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150-537: Copiapó lies about 800 km north of Santiago by the Copiapó River , in the valley of the same name. In the early 21st century, the river has dried up in response to climate change and more severe droughts. The town is surrounded by the Atacama Desert and receives 12 mm (½ in) of rain per year. The population of Copiapó was 9,128 in 1903; and 11,617 in 1907. As of 2012, there are 158,438 inhabitants. Copiapó

300-483: A 14-metre (46 ft) statue of the Virgin Mary . Today, the statue is visible from various points in the city. However, the shrine was not completed until several decades later. The 1910 Chile Centennial celebrations marked the beginning of several urban development projects. The railway network was expanded, connecting the city and its growing suburbs with a new ring and route to Cajón del Maipo . A new railway station

450-444: A January average of 22.2 °C (72.0 °F) and precipitation is virtually non-existent. Temperatures can occasionally exceed 30 °C (86.0 °F) any time of the year. The average annual precipitation is 18.8 millimetres (1 in), though this is highly variable, with some years recording no precipitation, as occurred in 1970, 1978, 1990, 1992-1993, and in 1998.. There are 3.2 days with measurable precipitation. The record high

600-465: A concern as well, and where enforced, modern practices have significantly improved safety in mines. Unregulated, poorly regulated or illegal mining , especially in developing economies , frequently contributes to local human rights violations and environmental conflicts . Mining can also perpetuate political instability through resource conflicts . Since the beginning of civilization, people have used stone , clay and, later, metals found close to

750-628: A football team called Club de Deportes Copiapó , which was born after the dissolution of Regional Atacama , in 1999. It plays in the Primera A League of football of Chile, and plays as local in the Luis Valenzuela Hermosilla Stadium and in the Municipal Stadium of Tierra Amarilla. This is the event that gathers the most 4x4 automobiles in the world, and it began in 1992. The effort and spirit of Raid Atacama has made it worthy of

900-486: A heated discussion about the actual implementation of mandatory earthquake standards in the city's modern architecture. Despite urban integration efforts, socioeconomic inequality and geosocial fragmentation remain two of the most important problems, both in the city and in the country. These problems have been considered one of the factors that led to the " Estallido Social " , a series of massive protests and severe riots carried out between 2019 and 2020. The protests led to

1050-636: A hopper and a shaking screen or trommel which frees the desired minerals from the waste gravel. The minerals are then concentrated using sluices or jigs. Large drills are used to sink shafts, excavate stopes, and obtain samples for analysis. Trams are used to transport miners, minerals and waste. Lifts carry miners into and out of mines, and move rock and ore out, and machinery in and out, of underground mines. Huge trucks, shovels and cranes are employed in surface mining to move large quantities of overburden and ore. Processing plants use large crushers, mills, reactors, roasters and other equipment to consolidate

1200-473: A layer of smog blanketed the city. In response, the authorities implemented legislative measures to reduce industrial pollution and placed restrictions on vehicle use. To address the problem of transportation, the metro system underwent significant expansion, with lines being extended and three new lines added between 1997 and 2006 in the southeastern sector. In 2011, a new extension was inaugurated in Maipú, bringing

1350-875: A mass of actual rock. Both types of ore deposit, placer or lode, are mined by both surface and underground methods. Some mining, including much of the rare earth elements and uranium mining , is done by less-common methods, such as in-situ leaching : this technique involves digging neither at the surface nor underground. The extraction of target minerals by this technique requires that they be soluble, e.g., potash , potassium chloride , sodium chloride , sodium sulfate , which dissolve in water. Some minerals, such as copper minerals and uranium oxide , require acid or carbonate solutions to dissolve. Explosives in Mining Explosives have been used in surface mining and sub-surface mining to blast out rock and ore intended for processing. The most common explosive used in mining

1500-426: A mining operation. Once the analysis determines a given ore body is worth recovering, development begins to create access to the ore body. The mine buildings and processing plants are built, and any necessary equipment is obtained. The operation of the mine to recover the ore begins and continues as long as the company operating the mine finds it economical to do so. Once all the ore that the mine can produce profitably

1650-503: A more sustainable future, the demand for metals is set to skyrocket. Between 2022 and 2050, an estimated 7 billion metric tons of metals will need to be extracted. Steel will account for the largest portion of this total at 5 billion tons, followed by aluminum at 950 million tons, copper at 650 million tons, graphite at 170 million tons, nickel at 100 million tons, and other metals. Notably, the energy expenditure required to extract these metals will soon surpass that of coal mining, highlighting

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1800-678: A north–south direction and 35 km (22 mi) from east to west. The Mapocho River flows through the city. The city is flanked by the main chain of the Andes to the east and the Chilean Coastal Range to the west. On the north, it is bordered by the Cordón de Chacabuco , a mountain range of the Andes. At the southern border lies the Angostura de Paine , an elongated spur of the Andes that almost reaches

1950-567: A powerful earthquake struck the city on 3 March 1985, causing minimal casualties but leaving many homeless and destroying numerous historic buildings. With the onset of the transition to democracy in 1990, the city of Santiago surpassed four million inhabitants, with the majority residing in the south, particularly in La Florida, which was the most populous area, followed by Puente Alto and Maipú. The real estate development in these municipalities, as well as in others such as Quilicura and Peñalolén,

2100-518: A serious civil confrontation, which led to thousands of arrests and accusations of human rights violations. Meanwhile, the demonstrations registered serious episodes of violence against public and private infrastructure, mainly in the surroundings of Plaza Baquedano , with the Santiago Metro being one of the most affected by these episodes: more than half of its stations registered damage (several being partially set on fire) and only eleven months later

2250-408: A strong inducement to extract these metals or to lease the deposits and collect royalties from mine operators. English, German , and Dutch capital combined to finance extraction and refining . Hundreds of German technicians and skilled workers were brought over; in 1642 a colony of 4,000 foreigners was mining and smelting copper at Keswick in the northwestern mountains. Use of water power in

2400-603: A virtual tie between them, López won the election with an overwhelming 50.07% of the votes to his rival's 31.52%. López's second term in office was characterized by high public expenditures, part of it from the Central Government to improve Chilean infrastructure toward the bicentennial of Independence. These expenditures went towards redesigning the Central Square, Matta Avenue and the City Chamber. In 2004, Marcos López

2550-515: A wider sense includes extraction of any non-renewable resource such as petroleum , natural gas , or even water . Modern mining processes involve prospecting for ore bodies, analysis of the profit potential of a proposed mine, extraction of the desired materials, and final reclamation or restoration of the land after the mine is closed. Mining materials are often obtained from ore bodies, lodes , veins , seams , reefs , or placer deposits . The exploitation of these deposits for raw materials

2700-635: Is ammonium nitrate . Between 1870 and 1920, in Queensland Australia, an increase in mining accidents lead to more safety measures surrounding the use of explosives for mining. In the United States of America, between 1990 and 1999, about 22.3 billion kilograms of explosives were used in mining quarrying and other industries; Moreover " coal mining used 66.4%, nonmetal mining and quarrying 13.5%, metal mining 10.4%, construction 7.1%, and all other users 2.6%". Artisanal and small-scale mining (ASM)

2850-515: Is Maglio Cicardini (Independent). The council has the following members: Since the return to democracy in 1990, there have been six mayoral elections held in Copiapó. In 1992, Mónica Calcutta (PPD) won the election against 24 candidates. Her term was characterized by public expenditures on green areas, parks, and street paving, and public infrastructure such as the new building of the City Hall (1994),

3000-811: Is a blanket term for a type of subsistence mining involving a miner who may or may not be officially employed by a mining company but works independently, mining minerals using their own resources, usually by hand. While there is no completely coherent definition for ASM, artisanal mining generally includes miners who are not officially employed by a mining company and use their own resources to mine. As such, they are part of an informal economy . ASM also includes, in small-scale mining, enterprises or individuals that employ workers for mining, but who generally still use similar manually-intensive methods as artisanal miners (such as working with hand tools). In addition, ASM can be characterized as distinct from large-scale mining (LSM) by less efficient extraction of pure minerals from

3150-506: Is dependent on investment, labor, energy, refining, and transportation cost. Mining operations can create a negative environmental impact, both during the mining activity and after the mine has closed. Hence, most of the world's nations have passed regulations to decrease the impact; however, the outsized role of mining in generating business for often rural, remote or economically depressed communities means that governments often fail to fully enforce such regulations. Work safety has long been

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3300-476: Is done by removing surface vegetation, dirt, and bedrock to reach buried ore deposits. Techniques of surface mining include: open-pit mining , which is the recovery of materials from an open pit in the ground; quarrying , identical to open-pit mining except that it refers to sand, stone and clay; strip mining , which consists of stripping surface layers off to reveal ore underneath; and mountaintop removal , commonly associated with coal mining, which involves taking

3450-720: Is headed by a provincial delegate appointed by the President of the Republic, and it is also part of the Santiago Metropolitan Region, governed by a popularly elected governor . When the term Santiago is used without further clarification, it typically refers to Gran Santiago (Greater Santiago), the metropolitan area characterized by continuous urban development. This area includes the commune of Santiago and over 40 other communes, encompassing much of Santiago Province and parts of neighboring provinces . The definition of

3600-576: Is in a rich silver and copper mining district. A bronze statue commemorates Juan Godoy , discoverer of the Chañarcillo silver mines in the 19th century. The Copiapó-Caldera railway line, built in 1850, was the first one in South America. The first section between Caldera and Monte Amargo was inaugurated on July 4, 1850 in honor of the Independence Day , as American businessman William Wheelwright

3750-613: Is mining upward, creating a sloping underground room, long wall mining , which is grinding a long ore surface underground, and room and pillar mining, which is removing ore from rooms while leaving pillars in place to support the roof of the room. Room and pillar mining often leads to retreat mining , in which supporting pillars are removed as miners retreat, allowing the room to cave in, thereby loosening more ore. Additional sub-surface mining methods include hard rock mining , bore hole mining, drift and fill mining, long hole slope mining, sub level caving, and block caving . Heavy machinery

3900-484: Is much more common, and produces, for example, 85% of minerals (excluding petroleum and natural gas) in the United States, including 98% of metallic ores. Targets are divided into two general categories of materials: placer deposits , consisting of valuable minerals contained within river gravels, beach sands, and other unconsolidated materials ; and lode deposits , where valuable minerals are found in veins, in layers, or in mineral grains generally distributed throughout

4050-413: Is not of immediate interest to the miner. The total movement of ore and waste constitutes the mining process. Often more waste than ore is mined during the life of a mine, depending on the nature and location of the ore body. Waste removal and placement is a major cost to the mining operator, so a detailed characterization of the waste material forms an essential part of the geological exploration program for

4200-479: Is present at over 1,000 meters of altitude. The natural vegetation of Santiago is made up of a thorny woodland of Vachellia caven (also known as Acacia caven and espinillo) and Prosopis chilensis in the west and an association of Vachellia caven and Baccharis paniculata in the east around the Andean foothills. Mining Mining is the extraction of valuable geological materials and minerals from

4350-584: Is recovered, reclamation can begin, to make the land used by the mine suitable for future use. Technical and economic challenges notwithstanding, successful mine development must also address human factors. Working conditions are paramount to success, especially with regard to exposures to dusts, radiation, noise, explosives hazards, and vibration, as well as illumination standards. Mining today increasingly must address environmental and community impacts, including psychological and sociological dimensions. Thus, mining educator Frank T. M. White (1909–1971), broadened

4500-534: Is the Tupungato mountain at 6,570 m (21,555 ft). Other mountains include Tupungatito , San José , and Maipo . Cerro El Plomo is the highest mountain visible from Santiago's urban area. During recent decades, urban growth has outgrown the boundaries of the city, expanding to the east up the slopes of the Andean Precordillera . In areas such as La Dehesa, Lo Curro, and El Arrayan, urban development

4650-521: Is the capital and largest city of Chile and one of the largest cities in the Americas . It is located in the country's central valley and is the center of the Santiago Metropolitan Region , which has a population of seven million, representing 40% of Chile's total population. Most of the city is situated between 500–650 m (1,640–2,133 ft) above sea level . Founded in 1541 by

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4800-423: Is the following: Copiapó has a desert climate ( Köppen : BWh ) with mild temperatures year round. Winters are mild with cool temperatures during the day, with a July maximum of 19.3 °C (66.7 °F) and cool to cold temperatures during the night, averaging 7 °C (44.6 °F). The cold Humboldt Current offshore leads to cool summer temperatures for being inland on its low latitude, and contributes to

4950-634: Is the largest producer of diamonds in Africa, with an estimated 12 million carats in 2019. Other types of mining reserves in Africa include cobalt , bauxite , iron ore , coal, and copper . Gold and coal mining started in Australia and New Zealand in the 19th century. Nickel has become important in the economy of New Caledonia . In Fiji , in 1934, the Emperor Gold Mining Company Ltd. established operations at Vatukoula , followed in 1935 by

5100-423: Is to conduct a feasibility study to evaluate the financial viability, the technical and financial risks, and the robustness of the project. This is when the mining company makes the decision whether to develop the mine or to walk away from the project. This includes mine planning to evaluate the economically recoverable portion of the deposit, the metallurgy and ore recoverability, marketability and payability of

5250-419: Is used in mining to explore and develop sites, to remove and stockpile overburden, to break and remove rocks of various hardness and toughness, to process the ore, and to carry out reclamation projects after the mine is closed. Bulldozers, drills, explosives and trucks are all necessary for excavating the land. In the case of placer mining , unconsolidated gravel, or alluvium , is fed into machinery consisting of

5400-475: Is very important in the region. According to the 2002 census of the National Statistics Institute , Copiapó had 129,091 inhabitants (64,922 men and 64,169 women). Of these, 125,983 (97.6%) lived in urban areas and 3,108 (2.4%) in rural areas . The population grew by 27.9% (28,184 persons) between the 1992 and 2002 censuses. According to the same census, the religious affiliation in Copiapó,

5550-468: The Apostle James , the patron saint of Spain. The city was established near Huelén, which Valdivia renamed Santa Lucía. He assigned the city's layout to master builder Pedro de Gamboa , who designed a grid plan . At its center, Gamboa placed a Plaza Mayor , which became the town's central hub. Surrounding the plaza, plots were designated for the cathedral , the jail, and the governor's house . The city

5700-519: The Arauco War . Santiago was left vulnerable, and a coalition of Mapuche and Picunche tribes led by chief Michimalonco destroyed the city on 11 September 1541, despite the efforts of a Spanish garrison of 55 soldiers defending the fort. The defense was led by Spanish conquistadora Inés de Suárez . When she realized they were being overpowered, she ordered the execution of all indigenous prisoners, displaying their heads on pikes and throwing some towards

5850-600: The Army of the Andes emerged victorious at the Battle of Chacabuco and restored the patriot government in Santiago. However, independence was still uncertain. The Spanish army achieved further victories in 1818 and advanced toward Santiago, but their progress was finally halted at the Battle of Maipú on April 5, 1818, on the Maipo River plains. With the end of the war, Bernardo O'Higgins

6000-555: The Copiapó Valley are thought to be around 10,000 years old. The settlement developed around the remains of an Inca cemetery. After the discovery of the rich silver deposits near Chañarcillo by Juan Godoy in 1832 it became an important mining centre, and until Chile annexed Antofagasta from Bolivia and Iquique and Arica from Peru following the War of the Pacific (1879–1883), Copiapó

6150-578: The Edificio Diego Portales was constructed in 1972. In 1967, the new Pudahuel International Airport was opened, and after years of discussion, construction of the Santiago Metro began in 1969. The first phase of the Metro, which ran beneath the western section of Alameda, was opened in 1975 and soon became one of the most prestigious buildings in the city. Over the following years, the Metro continued to expand, with two perpendicular lines in place by

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6300-513: The Greek author Diodorus Siculus , who mentions fire-setting as one method used to break down the hard rock holding the gold . One of the complexes is shown in one of the earliest known mining maps. The miners crushed the ore and ground it to a fine powder before washing the powder for the gold dust known as the dry and wet attachment processes. Mining in Europe has a very long history. Examples include

6450-470: The Inca cemetery in the city, which was investigated in the 1930s. In addition, a new casino has attracted both domestic and foreign tourists, and hotels have invested in new amenities and structures to satisfy demand. As a commune, Copiapó is a third-level administrative division of Chile administered by a municipal council , headed by an alcalde who is directly elected every four years. The 2012-2016 alcalde

6600-491: The National Stadium emerged in 1938. In the following decades, Santiago continued to grow at an unprecedented rate. In 1940, the city had a population of 952,075 residents, which increased to 1,350,409 by 1952, and reached 1,907,378 in the 1960 census. This growth was reflected in the urbanization of rural areas on the outskirts of the city, where middle and lower-class families with stable housing were established. In 1930,

6750-620: The Picunche people (as they were known to Chileans) or the Promaucae (as referred to by the Incas) were under Inca rule from the late 15th century to the early 16th century. The Incas established a settlement of mitimas in the valley, located in the center of present-day Santiago, with fortifications such as Huaca de Chena and the El Plomo hill sanctuary. According to Chilean historian Armando de Ramón ,

6900-407: The Picunche people who lived in the area. Valdivia later called a meeting with the local chiefs, during which he explained his plan to establish a city on behalf of Charles IV of Spain . The city would serve as the capital of his governorship of Nueva Extremadura . On 12 February 1541, Valdivia officially founded the city of Santiago del Nuevo Extremo ( Santiago of New Extremadura ) in honor of

7050-856: The Teatro Municipal opera house and the Club Hípico de Santiago . In addition, the 1875 International Exposition was held in the Quinta Normal grounds. Santiago emerged as the central hub of the national railway system. On 14 September 1857, the first railway arrived in the city and terminated at the Santiago Estación Central railway station , which was under construction at the time and officially opened in 1884. During this period, rail lines connected Santiago to Valparaíso and regions in northern and southern Chile. The streets of Santiago were also paved, and by 1875, there were 1,107 railway cars in

7200-507: The argentiferous galena in the mines of Cartagena ( Cartago Nova ), Linares ( Castulo ), Plasenzuela and Azuaga , among many others. Spain was one of the most important mining regions, but all regions of the Roman Empire were exploited. In Great Britain the natives had mined minerals for millennia , but after the Roman conquest , the scale of the operations increased dramatically, as

7350-409: The church of San Francisco in 1572. Both of these structures were primarily made of adobe and stone. In addition to the construction of significant buildings, the city began to thrive as the surrounding areas welcomed tens of thousands of livestock. During the 16th and 17th centuries, the growth of the city was hindered by a series of disasters including an earthquake , a smallpox epidemic in 1575,

7500-729: The electoral divisions of Chile , Copiapó is represented in the Chamber of Deputies by Lautaro Carmona ( PC ) and Daniella Cicardini Milla (Independent, backed up by the PS ) as part of the 5th electoral district, (together with Chañaral and Diego de Almagro ). The commune is represented in the Senate by Isabel Allende Bussi ( PS ) and Baldo Prokurica Prokurica ( RN ) as part of the 3rd senatorial constituency (Atacama Region). Copiapó provides public and private education, from kindergarten to high school, and also technical and bachelor's degrees. According to

7650-806: The greenstone of the Langdale axe industry based in the English Lake District . The oldest-known mine on archaeological record is the Ngwenya Mine in Eswatini (Swaziland) , which radiocarbon dating shows to be about 43,000 years old. At this site Paleolithic humans mined hematite to make the red pigment ochre . Mines of a similar age in Hungary are believed to be sites where Neanderthals may have mined flint for weapons and tools. Ancient Egyptians mined malachite at Maadi . At first, Egyptians used

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7800-418: The ministries and other public services, as well as the start of the construction of medium-rise buildings. Meanwhile, the traditional residents of the center began to migrate to more rural areas like Providencia and Ñuñoa, which attracted the oligarchy and European immigrant professionals, and San Miguel for middle-class families. Additionally, in the periphery, villas were built by various organizations of

7950-489: The 1980s when the government embraced a neoliberal economic model. In 1979, the master plan was revised, expanding the urban area to over 62,000 hectares for real estate development. This led to urban sprawl , particularly in La Florida , causing the city to reach 40,619 hectares in size in the early 1990s. According to the 1992 census, Santiago became the country's most populous municipality, with 328,881 residents. Tragically,

8100-505: The 21st century begins, a globalized mining industry of large multinational corporations has arisen. Peak minerals and environmental impacts have also become a concern. Different elements, particularly rare-earth minerals , have begun to increase in demand as a result of new technologies. In 2023, 8.5 billion metric tons of coal were extracted from the Earth's crust. However, as the global economy transitions away from fossil fuels and toward

8250-663: The 7th century to the 14th century. Gold was often traded to Mediterranean economies that demanded gold and could supply salt , even though much of Africa was abundant with salt due to the mines and resources in the Sahara desert . The trading of gold for salt was mostly used to promote trade between the different economies. Since the Great Trek in the 19th century, after, gold and diamond mining in Southern Africa has had major political and economic impacts. The Democratic Republic of Congo

8400-468: The Albasini and Don Álvaro chain-stores. The national government's free-market policies, along with a higher demand and better economic expectations, have encouraged the establishment here of such national businesses as the supermarkets Deca (1999), Jumbo (2005), and Lider (2006). Tourism in Copiapó has been developing since the early 21st century. Some come to see the desert and indigenous monuments, such as

8550-536: The Atacama Region, benefiting from the high amount of and constant solar radiation during the year. Solar photovoltaic energy production in 2016 reached more than 400 MW connected to the Central-North grid. Commerce is growing in Copiapó, largely old and new, small and medium enterprises. Downtown Copiapó activity reflects the growth of the city. Some local enterprises have grown rapidly in the last decade, such as

8700-528: The Congress mostly meets in nearby Valparaíso . In Chile, several entities share the name Santiago , which can often lead to confusion. The commune of Santiago , also referred to as Santiago Centro , is an administrative division encompassing the area occupied by the city during colonial times. It is governed by the Municipality of Santiago and led by a mayor. This commune is part of Santiago Province , which

8850-749: The Department of Education of Chile, Copiapó had (2007) an enrollment of more than 35.000 students, divided in the following programs: Kindergarten, 3.780 students; Differencial Education, 1.009 students; Elementary and Middle School, 20.794 students; High School, 10.291 students (5.185 in Scientific-Humanist programs and 5.106 in Technical-Professional programs). La commune of Copiapó offers public and private education held by 64 schools, divided in: 61 urbans and 3 rurals; 32 public, 23 State-subsidized private schools and 9 private schools. This city has

9000-524: The Earth's surface. These were used to make early tools and weapons; for example, high quality flint found in northern France , southern England and Poland was used to create flint tools . Flint mines have been found in chalk areas where seams of the stone were followed underground by shafts and galleries. The mines at Grimes Graves and Krzemionki are especially famous, and like most other flint mines, are Neolithic in origin (c. 4000–3000 BC). Other hard rocks mined or collected for axes included

9150-525: The Estadio Techado (1996), and the Technological School (inaugurated in 1997). During her term, Calcutta encouraged people to participate. One of these activities was the "Train of History" carried out in 1994 (for the 250th anniversary of Copiapó) and 1995. Despite all these expenditures, the City Hall ended up with no debt for 1996. In 1996, Calcutta ran for the re-election, but was defeated by

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9300-644: The French crown to operate mines in 1733, becoming "the first practical miner on Lake Superior"; seven years later, mining was halted by an outbreak between Sioux and Chippewa tribes. Mining in the United States became widespread in the 19th century, and the United States Congress passed the General Mining Act of 1872 to encourage mining of federal lands. As with the California Gold Rush in

9450-630: The Loloma Gold Mines, N.L., and then by Fiji Mines Development Ltd. (aka Dolphin Mines Ltd.). These developments ushered in a “mining boom”, with gold production rising more than a hundred-fold, from 931.4 oz in 1934 to 107,788.5 oz in 1939, an order of magnitude then comparable to the combined output of New Zealand and Australia's eastern states. During prehistoric times, early Americans mined large amounts of copper along Lake Superior 's Keweenaw Peninsula and in nearby Isle Royale ; metallic copper

9600-578: The Mapocho River floods in 1590, 1608, and 1618, and a devastating earthquake on 13 May 1647 which resulted in the death of over 600 people and affected over 5,000 others. Despite these setbacks, the capital of the Captaincy General of Chile continued to grow, with all the power of the country being centered on the Plaza de Armas in Santiago. In 1767, the corregidor Luis Manuel de Zañartu launched one of

9750-541: The National Award for Tourism. For over 21 years, the Atacama Raid has been the cornerstone of the development of off-road activities along Chile , and its example has been followed by many clubs and even several companies. In the last seven years, the enrollment has kept steady on an average of about 500 vehicles per event, and more than 1,800 participants from all regions of the country and abroad. In 1997, it reached

9900-674: The Normal School of Preceptors, the School of Arts and Crafts, and the Quinta Normal . The latter comprised the Museum of Fine Arts (now the Museum of Science and Technology) and the National Museum of Natural History . These institutions were established primarily for educational purposes, but also served as examples of public planning during that period. In 1851, the first telegraph system connecting

10050-639: The Rally Dakar Chile-Argentina has passed through, but also the place of birth of Jaime Prohens , considered by some as one of the most important participants of this rally. Copiapo is served by Desierto de Atacama Airport , with commercial passenger airline service on three of Chile's major airlines. As mentioned above, there is also an important railway in the city. Santiago, Chile Santiago ( / ˌ s æ n t i ˈ ɑː ɡ oʊ / , US also / ˌ s ɑː n -/ ; Spanish: [sanˈtjaɣo] ), also known as Santiago de Chile ( Spanish: [san̪ˈtja.ɣo ðe ˈtʃi.le] ),

10200-428: The Romans needed Britannia 's resources, especially gold , silver , tin , and lead . Roman techniques were not limited to surface mining. They followed the ore veins underground once opencast mining was no longer feasible. At Dolaucothi they stoped out the veins and drove adits through bare rock to drain the stopes. The same adits were also used to ventilate the workings, especially important when fire-setting

10350-417: The Santiago basin around the 10th millennium BC. These groups were primarily nomadic hunter-gatherers, traveling from the coast to the interior to hunt guanacos during the Andean snowmelt. By around 800 AD, the first permanent settlers established agricultural communities along the Mapocho River , where they cultivated crops such as maize , potatoes , and beans , and domesticated camelids. The villages of

10500-543: The Spanish conquistador Pedro de Valdivia , Santiago has served as the capital city of Chile since colonial times. The city features a downtown core characterized by 19th-century neoclassical architecture and winding side streets with a mix of art deco, neo-gothic, and other styles. Santiago's cityscape is defined by several stand-alone hills and the fast-flowing Mapocho River , which is lined by parks such as Parque Bicentenario , Parque Forestal , and Parque de la Familia . The Andes Mountains are visible from most parts of

10650-490: The Spanish to pulverize ore after being mined. This device was powered by animals and used the same principles used for grain threshing . Much of the knowledge of medieval mining techniques comes from books such as Biringuccio 's De la pirotechnia and probably most importantly from Georg Agricola 's De re metallica (1556). These books detail many different mining methods used in German and Saxon mines. A prime issue in medieval mines, which Agricola explains in detail,

10800-730: The Umm el-Sawwan site; gypsum was used to make funerary items for private tombs. Other minerals mined in Egypt from the Old Kingdom (2649-2134 BC) until the Roman Period (30 BC-AD 395) including granite , sandstone , limestone , basalt , travertine , gneiss , galena , and amethyst . Mining in Egypt occurred in the earliest dynasties. The gold mines of Nubia were among the largest and most extensive of any in Ancient Egypt. These mines are described by

10950-561: The area served as a base for failed Inca expeditions to the south and was a junction along the Inca Trail . Pedro de Valdivia , a conquistador from Extremadura sent by Francisco Pizarro from Peru , arrived in the Mapocho valley on 13 December 1540, after a long journey from Cusco . Valdivia and his party camped by the river on the slopes of the Tupahue hill and gradually began interacting with

11100-466: The aristocracy lost much of its power, and the middle class, composed of merchants, bureaucrats, and professionals, acquired the role of setting national policy. In this context, Santiago began to develop a substantial middle- and lower-class population, while the upper classes sought refuge in the districts of the capital. Thus, the old moneyed class, who previously frequented Cousiño and Alameda Park, lost their hegemony over popular entertainment venues, and

11250-583: The attackers. In response to this brutal act, the indigenous forces dispersed in fear. The city was gradually rebuilt, with the newly established city of Concepción gaining political prominence as the Royal Audiencia of Chile was established there in 1565. However, the ongoing threat of the Arauco War and frequent earthquakes delayed the establishment of the Royal Court in Santiago until 1607, which solidified

11400-624: The beginning of Chile’s path to independence . The city, which became the capital of the newly formed nation, faced various challenges, particularly from military actions in the vicinity. Although institutions like the Instituto Nacional and the National Library were established during the Patria Vieja , they were shut down after the patriots’ defeat at the Battle of Rancagua in 1814. The royal government continued until 1817, when

11550-521: The bright green malachite stones for ornamentations and pottery . Later, between 2613 and 2494 BC, large building projects required expeditions abroad to the area of Wadi Maghareh in order to secure minerals and other resources not available in Egypt itself. Quarries for turquoise and copper were also found at Wadi Hammamat , Tura , Aswan and various other Nubian sites on the Sinai Peninsula and at Timna . Quarries for gypsum were found at

11700-474: The capital to the Port of Valparaíso was inaugurated. During the "Liberal Republic" and the administration of Mayor Benjamín Vicuña Mackenna , a new phase in the urban development of the capital was initiated. One of the main projects during this period was the remodeling of Cerro Santa Lucía , which had fallen into disrepair despite its central location. In his effort to transform Santiago, Vicuña Mackenna initiated

11850-589: The cathedral's façade, the Palacio de La Moneda , the San Carlos Canal , and the completion of the embankments during the government of Ambrosio O'Higgins . These works were officially opened in 1798. The O'Higgins government also opened the road to Valparaíso in 1791, connecting the capital with the country's main port. On September 18, 1810, the First Government Junta was proclaimed in Santiago, marking

12000-482: The center, lies at 570 m (1,870 ft). Estadio San Carlos de Apoquindo , at the eastern edge of the city, has an elevation of 960 m (3,150 ft). The Santiago Basin is part of the Intermediate Depression and is remarkably flat, interrupted only by a few "island hills;" among them are Cerro Renca , Cerro Blanco , and Cerro Santa Lucía . The basin is approximately 80 kilometers (50 miles) in

12150-549: The central streets of Santiago, further diminishing the role of Valparaíso. The enactment of the Autonomous Municipalities Act empowered municipalities to establish various administrative divisions within the Santiago department, with the goal of enhancing local governance. In 1891, the municipalities of Maipú , Ñuñoa , Renca , Lampa , and Colina were created, followed by Providencia and Barrancas in 1897, and Las Condes in 1901. The La Victoria departmento

12300-530: The city and contribute to a smog problem, particularly during winter due to the lack of rain. The outskirts of the city are surrounded by vineyards, and Santiago is within an hour's drive of both the mountains and the Pacific Ocean. Santiago is the political and financial center of Chile and hosts the regional headquarters of many multinational corporations and organizations . The Chilean government's executive and judiciary branches are based in Santiago, while

12450-412: The city created a crisis in the city center. To reinvigorate the area, the government transformed the main shopping streets into pedestrian walkways, as it did in the 1970s, and offered tax benefits for the construction of residential buildings, which attracted young adults. The city faced a series of problems due to disorganized growth. During the winter months, air pollution reached critical levels and

12600-524: The city's status as the capital. During the early years of the city, the Spanish suffered from severe shortages of food and other supplies. The Picunches had adopted a strategy of halting cultivation and retreating to more remote locations, which isolated the Spanish and forced them to resort to eating whatever they could find. The shortage of clothing meant that some Spanish had to dress with hides from dogs, cats, sea lions , and foxes . Although Santiago

12750-492: The city, while 45,000 people used trams daily. As the new century began, Santiago underwent various changes due to the rapid growth of industry. Valparaíso, which had previously been the economic center of the country, gradually lost its prominence to the capital. By 1895, 75% of the national manufacturing industry was located in Santiago, while only 28% was in Valparaíso. By 1910, major banks and shops had established themselves in

12900-422: The city. The miners were 700 meters (2,300 ft) deep and 5 kilometers (3 mi) from the mine's entrance via spiraling underground ramps. Private, local, national and international resources cooperated in their rescue. The miners survived underground for 69 days until all were brought to the surface on 13 October 2010, a record period of time. This mine has been closed, but the industry of copper and gold mining

13050-612: The coast. The mountain range immediately bordering the city on the east is known as the Sierra de Ramón , which was formed due to tectonic activity of the San Ramón Fault . This range reaches 3296 meters at Cerro de Ramón . The Sierra de Ramón represents the " Precordillera " of the Andes. 20 km (12 mi) further east is the even larger Cordillera of the Andes , which has mountains and volcanoes that exceed 6,000 m (19,690 ft) and on which some glaciers are present. The tallest

13200-554: The construction of new avenues, such as the Américo Vespucio Avenue and Panamericana Route 5 , as well as the expansion of 'industrial belts'. The 1962 World Cup provided a new impetus for city improvement efforts, and in 1966, the Santiago Metropolitan Park was established on Cerro San Cristóbal. The Ministry of Housing and Urbanism ( MINVU ) also began to eradicate shantytowns and build new homes. Finally,

13350-519: The construction of the Camino de Cintura , a road surrounding the entire city. The redevelopment of Alameda Avenue also took place during this time, turning it into the city's main road. Also during this era, O'Higgins Park was established with the help of European landscapers in 1873. The public park, known for its large gardens, lakes, and carriage trails, became a landmark in Santiago. Other notable structures were also opened during this period, including

13500-685: The construction of the Ciudad Parque Bicentenario, which marked the bicentenary of the Republic. The trend of constructing tall buildings continued in the eastern sector, which was highlighted by the opening of the Titanium La Portada and Gran Torre Santiago skyscrapers in the Costanera Center complex. On 27 February 2010, a powerful earthquake hit the capital city of Santiago, causing damage to some older buildings and rendering some modern structures uninhabitable. This sparked

13650-417: The cutter-head is progressively launched further into the coal seam. High wall mining can produce thousands of tons of coal in contour-strip operations with narrow benches, previously mined areas, trench mine applications and steep-dip seams. Sub-surface mining consists of digging tunnels or shafts into the earth to reach buried ore deposits. Ore, for processing, and waste rock, for disposal, are brought to

13800-466: The eastern sector. This development extended to the Barrio Alto , which became an attractive location for the construction of high-rise buildings. Major companies and financial corporations established themselves in the area, giving rise to a thriving modern business center commonly known as Sanhattan . The departure of these companies to Barrio Alto and the construction of shopping centers all around

13950-510: The end of 1978. Building telecommunications infrastructure was also an important development of this period, as reflected in the construction of the Torre Entel , which, since its construction in 1975, has become one of the symbols of the capital and remained the tallest structure in the country for two decades. After the military coup of 1973 and the establishment of the military regime , significant changes in urban planning did not occur until

14100-698: The focus to the “total environment of mining”, including reference to community development around mining, and how mining is portrayed to an urban society, which depends on the industry, although seemingly unaware of this dependency. He stated, “[I]n the past, mining engineers have not been called upon to study the psychological, sociological and personal problems of their own industry – aspects that nowadays are assuming tremendous importance. The mining engineer must rapidly expand his knowledge and his influence into these newer fields.” Mining techniques can be divided into two common excavation types: surface mining and sub-surface (underground) mining . Today, surface mining

14250-579: The foothills of Las Condes and the La Reina sector. The regulation of growth in Santiago only began in the 1960s with the creation of various development plans for Greater Santiago, a concept that reflected the city's new reality as a much larger urban center. In 1958, the Intercommunal Plan of Santiago was released, which proposed a limit of 38,600 urban and semi-urban hectares for a maximum population of 3,260,000 residents. The plan also included plans for

14400-481: The form of water mills was extensive. The water mills were employed in crushing ore, raising ore from shafts, and ventilating galleries by powering giant bellows . Black powder was first used in mining in Selmecbánya , Kingdom of Hungary (now Banská Štiavnica , Slovakia) in 1627. Black powder allowed blasting of rock and earth to loosen and reveal ore veins. Blasting was much faster than fire-setting and allowed

14550-400: The growing importance of sustainable metal extraction practices. The process of mining from discovery of an ore body through extraction of minerals and finally to returning the land to its natural state consists of several distinct steps. The first is discovery of the ore body, which is carried out through prospecting or exploration to find and then define the extent, location and value of

14700-449: The largest number of participants to date, bringing together 613 4x4 vehicles. With no other event as large, this made it possible to apply for registration as a world record. Another of the achievements is to hold, without competition, the record for international off-road event (amateur) with greater permanence in time. In the last years, Copiapó has been not only one of the Chilean communes

14850-567: The latter derived from the Galician evolution of Vulgar Latin Sanctu Iacobu . Allegedly, there was no indigenous name for the area where Santiago is located, but the Mapuche language uses the adapted name Santiaw . Residents of the city and region are referred to as santiaguinos (for males) and santiaguinas (for females). Archaeological evidence suggests that the first human groups arrived in

15000-474: The metals due to the difficulties of transporting them, but the copper was eventually traded throughout the continent along major river routes. In the early colonial history of the Americas, "native gold and silver was quickly expropriated and sent back to Spain in fleets of gold- and silver-laden galleons", the gold and silver originating mostly from mines in Central and South America. Turquoise dated at 700 AD

15150-536: The metropolitan area has evolved over time as the city has expanded, incorporating smaller cities and rural areas. The name Santiago was chosen by the Spanish conqueror Pedro de Valdivia when he founded the city in 1541 as "Santiago del Nuevo Extremo," in reference to his home region of Extremadura and as a tribute to James the Great , the patron saint of Spain . The saint's name appears in various forms in Spanish, such as Diego , Jaime , Jacobo , or Santiago , with

15300-703: The mid-19th century, mining for minerals and precious metals, along with ranching , became a driving factor in the U.S. Westward Expansion to the Pacific coast. With the exploration of the West, mining camps sprang up and "expressed a distinctive spirit, an enduring legacy to the new nation"; Gold Rushers would experience the same problems as the Land Rushers of the transient West that preceded them. Aided by railroads, many people traveled West for work opportunities in mining. Western cities such as Denver and Sacramento originated as mining towns. When new areas were explored, it

15450-492: The mid-sixteenth century. On the continent, mineral deposits belonged to the crown, and this regalian right was stoutly maintained. But in England, royal mining rights were restricted to gold and silver (of which England had virtually no deposits) by a judicial decision of 1568 and a law in 1688. England had iron , zinc , copper , lead , and tin ores. Landlords who owned the base metals and coal under their estates then had

15600-432: The minehead, where the water was stored in large reservoirs and tanks. When a full tank was opened, the flood of water sluiced away the overburden to expose the bedrock underneath and any gold-bearing veins. The rock was then worked by fire-setting to heat the rock, which would be quenched with a stream of water. The resulting thermal shock cracked the rock, enabling it to be removed by further streams of water from

15750-431: The mining of previously impenetrable metals and ores. In 1762, one of the world's first mining academies was established in the same town there. The widespread adoption of agricultural innovations such as the iron plowshare , as well as the growing use of metal as a building material, was also a driving force in the tremendous growth of the iron industry during this period. Inventions like the arrastra were often used by

15900-561: The most significant architectural projects of the colonial period, the Calicanto Bridge, connecting the city to La Chimba on the north side of the Mapocho River. He also began constructing embankments to prevent river overflows. Although the bridge was completed, its piers were frequently damaged by the river. In 1780, Governor Agustín de Jáuregui hired the Italian architect Joaquín Toesca , who designed several important buildings, including

16050-539: The network returned to full normal service. The city lies in the center of the Santiago Basin , a large bowl-shaped valley consisting of broad and fertile lands surrounded by mountains. The city has a varying elevation, gradually increasing from 400 m (1,312 ft) in the western areas to more than 700 m (2,297 ft) in the eastern areas. Santiago's international airport , in the west, lies at an altitude of 460 m (1,509 ft). Plaza Baquedano , near

16200-405: The ore body. This leads to a mathematical resource estimation to estimate the size and grade of the deposit. This estimation is used to conduct a pre-feasibility study to determine the theoretical economics of the ore deposit. This identifies, early on, whether further investment in estimation and engineering studies is warranted and identifies key risks and areas for further work. The next step

16350-462: The ore concentrates, engineering concerns, milling and infrastructure costs, finance and equity requirements, and an analysis of the proposed mine from the initial excavation all the way through to reclamation. The proportion of a deposit that is economically recoverable is dependent on the enrichment factor of the ore in the area. To gain access to the mineral deposit within an area it is often necessary to mine through or remove waste material which

16500-442: The ore, lower wages, decreased occupational safety, benefits, and health standards for miners, and a lack of environmental protection measures. Artisanal miners often undertake the activity of mining seasonally. For example, crops are planted in the rainy season , and mining is pursued in the dry season . However, they also frequently travel to mining areas and work year-round. There are four broad types of ASM: Surface mining

16650-605: The overhead tanks. The Roman miners used similar methods to work cassiterite deposits in Cornwall and lead ore in the Pennines . Sluicing methods were developed by the Romans in Spain in 25 AD to exploit large alluvial gold deposits, the largest site being at Las Medulas , where seven long aqueducts tapped local rivers and sluiced the deposits. The Romans also exploited the silver present in

16800-412: The population of Santiago to be 507,296 inhabitants, equivalent to 13.6% of the total population of Chile. This represented a growth of 52.5% from the 1907 census, an annual increase of 3.3%, which was almost three times the national average. This growth was mainly due to an influx of farmers from the southern regions who came to work in the factories and railroads that were being built. However, this growth

16950-534: The production. The copper obtained by pirquineros (miners) goes to the copper smelter at Paipote . Agriculture is the second-largest source of income in this area. It consists largely of grape production, with olives, tomatoes, avocados and some citrus fruits also produced as commodity crops. Industry : Copiapó has mainly light industry, and some medium industry such as the INACESA plant and Paipote copper refinery. Energy : Many important solar plants were built in

17100-431: The remaining part of a coal seam previously exploited by other surface-mining techniques has too much overburden to be removed but can still be profitably exploited from the side of the artificial cliff made by previous mining. A typical cycle alternates sumping, which undercuts the seam, and shearing, which raises and lowers the cutter-head boom to cut the entire height of the coal seam. As the coal recovery cycle continues,

17250-446: The shafts could no longer be pumped dry with the available technology. Although an increased use of banknotes , credit and copper coins during this period did decrease the value of, and dependence on, precious metals , gold and silver still remained vital to the story of medieval mining. Due to differences in the social structure of society, the increasing extraction of mineral deposits spread from central Europe to England in

17400-558: The silver mines of Laurium , which helped support the Greek city state of Athens . Although they had over 20,000 slaves working them, their technology was essentially identical to their Bronze Age predecessors. At other mines, such as on the island of Thassos , marble was quarried by the Parians after they arrived in the 7th century BC. The marble was shipped away and was later found by archaeologists to have been used in buildings including

17550-462: The socialist candidate Marcos López (city councilor 1992–1996) by a narrow margin of 146 votes. López's term differed substantially from Calcutta's; his first three years as mayor did not see any important public expenditures in visible things. They came out the year before the following election. The 2000 election was a very confrontational one. López and Calcutta ran for election together with 10 other candidates. In spite of surveys that showed

17700-426: The streets. The harsh living conditions resulted in widespread diseases like tuberculosis, and took a toll on the homeless population. At the same time, unemployment rates and living costs skyrocketed, while the salaries of the people in Santiago fell. The situation would change several years later with a new industrial boom fostered by CORFO and the expansion of the state apparatus from the late 1930s. At this time,

17850-533: The surface of the Earth . Mining is required to obtain most materials that cannot be grown through agricultural processes , or feasibly created artificially in a laboratory or factory. Ores recovered by mining include metals , coal , oil shale , gemstones , limestone , chalk , dimension stone , rock salt , potash , gravel , and clay . The ore must be a rock or mineral that contains valuable constituent, can be extracted or mined and sold for profit. Mining in

18000-474: The surface through the tunnels and shafts. Sub-surface mining can be classified by the type of access shafts used, and the extraction method or the technique used to reach the mineral deposit. Drift mining uses horizontal access tunnels, slope mining uses diagonally sloping access shafts, and shaft mining uses vertical access shafts. Mining in hard and soft rock formations requires different techniques. Other methods include shrinkage stope mining , which

18150-488: The time. Modernity also spread in the city, with the introduction of the first theaters, the expansion of the telephone network, and the opening of Los Cerrillos Airport in 1928, among other advancements. The perception that the early 20th century was a time of economic prosperity due to technological advancements was in stark contrast to the living conditions of lower social classes. The previous decades of growth resulted in an unprecedented population boom starting in 1929, but

18300-542: The tomb of Amphipolis. Philip II of Macedon , the father of Alexander the Great , captured the gold mines of Mount Pangeo in 357 BC to fund his military campaigns. He also captured gold mines in Thrace for minting coinage, eventually producing 26 tons per year. However, it was the Romans who developed large-scale mining methods, especially the use of large volumes of water brought to the minehead by numerous aqueducts . The water

18450-448: The top of a mountain off to reach ore deposits at depth. Most placer deposits, because they are shallowly buried, are mined by surface methods. Finally, landfill mining involves sites where landfills are excavated and processed. Landfill mining has been thought of as a long-term solution to methane emissions and local pollution. High wall mining, which evolved from auger mining, is another form of surface mining. In high wall mining,

18600-557: The top slats. Many examples of such devices have been found in old Roman mines and some examples are now preserved in the British Museum and the National Museum of Wales . Mining as an industry underwent dramatic changes in medieval Europe . The mining industry in the early Middle Ages was mainly focused on the extraction of copper and iron . Other precious metals were also used, mainly for gilding or coinage. Initially, many metals were obtained through open-pit mining , and ore

18750-431: The total length of the metropolitan railway to 105 km (65 mi). In the early 1990s, the bus system also underwent a major reform. In 2007, the master plan known as Transantiago was established, although it has faced various challenges since its implementation. Entering the 21st century, rapid development continued in Santiago. The Civic District was revitalized with the creation of the Plaza de la Ciudadanía and

18900-417: The urban area covered 6,500 hectares, which increased to 20,900 in 1960 and to 38,296 in 1980. Although growth was mainly concentrated in communities such as Barrancas to the west, Conchalí to the north, and La Cisterna and La Granja to the south, the center of the city lost population, leaving more space for commercial, banking, and government development. The upper class, on the other hand, began to settle in

19050-403: The very low annual rainfall. Temperatures rarely fall below freezing. Most of the precipitation falls during this time of the year with June and July being the wettest months. While winters are normally dry, precipitation is highly variable. This was the case when June 1998 recorded 68 millimetres (3 in) of precipitation but generally, in most years, precipitation is rare. Summers are warm with

19200-461: The world's gold, followed by the establishment of large mines such as the Mount Morgan Mine , which ran for nearly a hundred years, Broken Hill ore deposit (one of the largest zinc-lead ore deposits), and the iron ore mines at Iron Knob . After declines in production, another boom in mining occurred in the 1960s. In the early 21st century, Australia remains a major world mineral producer. As

19350-468: The world, which was increasingly demanding copper for electrical and household goods. Canada's mining industry grew more slowly than did the United States due to limitations in transportation, capital, and U.S. competition; Ontario was the major producer of the early 20th century with nickel, copper, and gold. Meanwhile, Australia experienced the Australian gold rushes and by the 1850s was producing 40% of

19500-580: Was 34.0 °C (93.2 °F) in August 1972 and the record low was −2.0 °C (28.4 °F) in June 1975. Copiapó has a diversified and potential economy, but mining is the largest economic activity. The Copiapó Basin has a great deal of copper ore, mined by companies such as Minera Candelaria, which extracts copper near Tierra Amarilla , a neighboring commune. This generates a need for transportation, light industry, and services. "Small mining" represents over 30% of

19650-513: Was accepted as Supreme Director and, like his father, undertook several important projects for the city. During the Patria Nueva era, previously closed institutions were reopened. The General Cemetery was inaugurated, work on the San Carlos Canal was completed, and the drying riverbed in the south arm of the Mapocho River, known as La Cañada, which had been used as a landfill for some time,

19800-562: Was also built in the north of the city: the Mapocho Station . The Parque Forestal was established on the southern side of the Mapocho river, and new buildings such as the Museum of Fine Arts , the Barros Arana public boarding school , and the National Library were opened. In addition, a sewer system was installed, serving approximately 85% of the city's population. The 1920 census estimated

19950-402: Was also divided, leading to the creation of Lo Cañas in 1891, which was then further split into La Granja and Puente Alto in 1892, followed by La Florida in 1899, and La Cisterna in 1925. The San Cristobal Hill underwent a prolonged process of development during this period. In 1903, an astronomical observatory was established on the hill, and the following year, construction began on

20100-449: Was concentrated in the suburbs and not in the city center. During this time, the downtown district consolidated as a commercial, financial, and administrative center, with the establishment of various shops and businesses around Ahumada Street and a Civic District in the vicinity of the Palace of La Moneda. The latter project involved the construction of modernist buildings for the offices of

20250-470: Was divided into eight blocks from north to south and ten blocks from east to west, between the Mapocho River and the Cañada with each quarter-block, or solar , granted to settlers. The colonial architecture following the grid plan consisted of one or two-story houses, adobe walls, tile roofs, and rooms around interior corridors and patios . Valdivia left for the south with his troops months later, initiating

20400-520: Was due to suburban expansion to the south and west of the capital, as well as the growth of the bustling district of La Chimba, which resulted from the division of old properties in the area. This new peripheral development marked the end of the previous checkerboard structure that had dominated the city center. During the Republican era, several institutions were founded, including the University of Chile ,

20550-438: Was elected to another term, defeating the rightist candidate René Aedo (RN) with 50.01% to 40.82% of the votes. In 2008, López ran for a fourth term, but was defeated by the independent candidate Maglio Cicardini Neyra , by a margin of less than 1% of the votes. In 2012, López ran once again, but lost against Cicardini, who won the election with more than 50% of the votes. In 2016, Cicardini lost against Marcos López. Within

20700-399: Was facing the threat of permanent destruction early on, due to attacks from indigenous peoples, earthquakes, and floods, the city began to grow rapidly. Out of the 126 blocks designed by Pedro de Gamboa in 1558, 40 were occupied. In 1580, the first major buildings in the city started to be erected, marked by the placement of the foundation stone of the first Cathedral in 1561 and the building of

20850-428: Was largely driven by the construction of housing projects for middle-class families. Meanwhile, high-income families relocated to the foothills, now commonly referred to as Barrio Alto , boosting the population of Las Condes and giving rise to young communes, including Lo Barnechea and Vitacura , both established in 1981 and 1991, respectively. The area around Providencia Avenue became an important commercial hub in

21000-487: Was met with tragedy as the Great Depression hit. The collapse of the nitrate industry in the north left 60,000 people unemployed, compounded by a decline in agricultural exports, resulting in an estimated 300,000 unemployed people nationwide. Desperate for survival, many migrants flocked to Santiago and its thriving industry. However, they often found themselves struggling to find housing, with many being forced to live on

21150-612: Was mined in pre-Columbian America; in the Cerillos Mining District in New Mexico , an estimate of "about 15,000 tons of rock had been removed from Mt. Chalchihuitl using stone tools before 1700." In 1727 Louis Denys (Denis) (1675–1741), sieur de La Ronde – brother of Simon-Pierre Denys de Bonaventure and the son-in-law of René Chartier – took command of Fort La Pointe at Chequamegon Bay ; where natives informed him of an island of copper. La Ronde obtained permission from

21300-576: Was primarily extracted from shallow depths, rather than through deep mine shafts. Around the 14th century , the growing use of weapons , armour , stirrups , and horseshoes greatly increased the demand for iron. Medieval knights , for example, were often laden with up to 100 pounds (45 kg) of plate or chain link armour in addition to swords , lances and other weapons. The overwhelming dependency on iron for military purposes spurred iron production and extraction processes. The silver crisis of 1465 occurred when all mines had reached depths at which

21450-681: Was responsible for the project. The original wooden railway station is now a National Monument. Spanish explorers founded the settlement in 1742 and named it San Francisco de la Selva de Copiapó or Saint Francis of the Jungle of Copiapó, due to its lush vegetation. Prior to Spanish occupation, the area was inhabited by the Diaguita people under the rule of the Inca Empire into the 16th century. Remains of Diaguita fortresses have been found in this area. The earliest archaeological remains of human activity in

21600-406: Was still present near the surface in colonial times. Indigenous peoples used Lake Superior copper from at least 5,000 years ago; copper tools, arrowheads, and other artifacts that were part of an extensive native trade-network have been discovered. In addition, obsidian , flint , and other minerals were mined, worked, and traded. Early French explorers who encountered the sites made no use of

21750-480: Was the nation's northernmost city and main mining city. An earthquake on 4 December 1918 caused extensive damage throughout the city. Through the 20th century, the city of Copiapó grew markedly, both from the mining industry and its role as capital of its department. On 5 August 2010, the San José Copper Mine collapsed, trapping 33 miners underground. The mine was about 45 kilometers (28 mi) north of

21900-411: Was the removal of water from mining shafts. As miners dug deeper to access new veins, flooding became a very real obstacle. The mining industry became dramatically more efficient and prosperous with the invention of mechanically- and animal-driven pumps. Iron metallurgy in Africa dates back over four thousand years. Gold became an important commodity for Africa during the trans-Saharan gold trade from

22050-458: Was transformed into an avenue now known as the Alameda de las Delicias . Two earthquakes struck the city in the 19th century: one on November 19, 1822, and another on February 20, 1835. Despite these disasters, the city continued to grow rapidly. In 1820, the population was recorded as 46,000, but by 1854, it had risen to 69,018. By 1865, the census reported 115,337 residents. This significant increase

22200-403: Was used for a variety of purposes, including removing overburden and rock debris, called hydraulic mining , as well as washing comminuted , or crushed, ores and driving simple machinery. The Romans used hydraulic mining methods on a large scale to prospect for the veins of ore, especially using a now-obsolete form of mining known as hushing . They built numerous aqueducts to supply water to

22350-461: Was used. At other parts of the site, they penetrated the water table and dewatered the mines using several kinds of machines, especially reverse overshot water-wheels . These were used extensively in the copper mines at Rio Tinto in Spain, where one sequence comprised 16 such wheels arranged in pairs, and lifting water about 24 metres (79 ft). They were worked as treadmills with miners standing on

22500-539: Was usually the gold ( placer and then lode ) and then silver that were taken into possession and extracted first. Other metals would often wait for railroads or canals, as coarse gold dust and nuggets do not require smelting and are easy to identify and transport. In the early 20th century, the gold and silver rush to the western United States also stimulated mining for coal as well as base metals such as copper, lead, and iron. Areas in modern Montana, Utah, Arizona, and later Alaska became predominant suppliers of copper to

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