112-1035: [REDACTED] Look up yk in Wiktionary, the free dictionary. YK or yk may refer to: Places [ edit ] Yellowknife, Northwest Territories , the capital of the Northwest Territories of Canada Yogyakarta , a city in Indonesia Yogyakarta railway station , a railway station in Yogyakarta (station code YK) Yukon , a territory in Canada (with any casing, within internet TLD .CA, and as YK for an unofficial postal abbreviation) In business [ edit ] IATA airline codes: YK, former code for Cyprus Turkish Airlines (defunct since June 2010) Avia Traffic Company of Kyrgyzstan (starting between June 2010 and end of 2015) Yugen kaisha ,
224-399: A fault . Water often lubricates faults, filling in fractures and jogs. About 10 kilometres (6.2 mi) below the surface, under very high temperatures and pressures, the water carries high concentrations of carbon dioxide, silica, and gold. During an earthquake, the fault jog suddenly opens wider. The water inside the void instantly vaporizes, flashing to steam and forcing silica, which forms
336-610: A premier , which forms the Executive Council of the Northwest Territories , also known as the cabinet . In addition, a Commissioner is appointed by the Federal Government to fulfil a similar role to that of the Lieutenant Governor . The Northwest Territories is one of only two federal, provincial or territorial jurisdictions in Canada that operate under a consensus system of government . The Northwest Territories
448-580: A 27 km (17 mi) drive via the Ingraham Trail . Yellowknife has three publicly funded school boards (districts) that provide kindergarten and grades 1–12: The NWT Montessori Society offers the Montessori program up to Grade 5 at Yellowknife Education District No. 1's Macpherson School. In the 2021 Census of Population conducted by Statistics Canada , Yellowknife had a population of 20,340 living in 7,519 of its 7,975 total private dwellings,
560-419: A change of 3.9% from its 2016 population of 19,569 . With a land area of 103.37 km (39.91 sq mi), it had a population density of 196.8/km (509.6/sq mi) in 2021. As of the 2016 Census , there were 19,569 people and 7,130 households in the city. The population density was 185.5/km (480/sq mi). The 2016 Census found that 22.7% of residents identified as Indigenous . In 2017,
672-483: A dilute solution of gold(III) chloride or chlorauric acid . Unlike sulfur, phosphorus reacts directly with gold at elevated temperatures to produce gold phosphide (Au 2 P 3 ). Gold readily dissolves in mercury at room temperature to form an amalgam , and forms alloys with many other metals at higher temperatures. These alloys can be produced to modify the hardness and other metallurgical properties, to control melting point or to create exotic colors. Gold
784-462: A downturn in the 1990s during the closure of the gold mines and the downsizing of the government workforce in 1999, Yellowknife's economy has recovered, largely because of the diamond boom; the Ekati Diamond Mine , owned and operated by BHP Billiton (sold to Dominion Diamond Corporation in 2013), opened in 1998. A second mine, Diavik Diamond Mine , began production in 2003. Production from
896-468: A form of business organization in Japan Other uses [ edit ] Yom Kippur , a Jewish Day of Atonement Yottakelvin , a measure of temperature equal to 1 septillion kelvin, or 1000000000000000000000000K Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with the title YK . If an internal link led you here, you may wish to change
1008-572: A gold-from-seawater swindle in the United States in the 1890s, as did an English fraudster in the early 1900s. Fritz Haber did research on the extraction of gold from sea water in an effort to help pay Germany 's reparations following World War I . Based on the published values of 2 to 64 ppb of gold in seawater, a commercially successful extraction seemed possible. After analysis of 4,000 water samples yielding an average of 0.004 ppb, it became clear that extraction would not be possible, and he ended
1120-830: A golden hue to metallic caesium . Common colored gold alloys include the distinctive eighteen-karat rose gold created by the addition of copper. Alloys containing palladium or nickel are also important in commercial jewelry as these produce white gold alloys. Fourteen-karat gold-copper alloy is nearly identical in color to certain bronze alloys, and both may be used to produce police and other badges . Fourteen- and eighteen-karat gold alloys with silver alone appear greenish-yellow and are referred to as green gold . Blue gold can be made by alloying with iron , and purple gold can be made by alloying with aluminium . Less commonly, addition of manganese , indium , and other elements can produce more unusual colors of gold for various applications. Colloidal gold , used by electron-microscopists,
1232-552: A large alluvial deposit. The mines at Roşia Montană in Transylvania were also very large, and until very recently, still mined by opencast methods. They also exploited smaller deposits in Britain , such as placer and hard-rock deposits at Dolaucothi . The various methods they used are well described by Pliny the Elder in his encyclopedia Naturalis Historia written towards the end of
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#17328815871021344-581: A large variation between day and night. Daylight hours range from five hours of daylight in December to 20 hours in June. Civil Twilight lasts all night from late May to mid-July. Yellowknife has a subarctic climate ( Köppen : Dfc , Trewartha Ecld ). Although winter is predominantly polar, rapid heat waves emerge at the summit of summer due to the immense path south. The city averages less than 300 mm (12 in) of precipitation annually, as it lies in
1456-416: A larger crew to develop the previous gold finds and search for more. Gold was found on the east side of Yellowknife Bay in 1934 and the short-lived Burwash Mine was developed. When government geologists uncovered gold in more favourable geology on the west side of Yellowknife Bay in the fall of 1935, a small staking rush occurred. From 1935 to 1937, one prospector and trapper named Winslow C. Ranney staked in
1568-493: A modern transportation system. Yellowknife Airport is the busiest airport in northern Canada , having 70,699 aircraft movements in 2007 and handling over 400,000 passengers and 30,000 tonnes of cargo yearly. It has two asphalt runways, one 7,500 ft (2,300 m) strip and another of 5,000 ft (1,500 m); while the Yellowknife Airport is classified as an airport of entry by Nav Canada and
1680-462: A novel type of metal-halide perovskite material consisting of Au and Au cations in its crystal structure has been found. It has been shown to be unexpectedly stable at normal conditions. Gold pentafluoride , along with its derivative anion, AuF − 6 , and its difluorine complex , gold heptafluoride , is the sole example of gold(V), the highest verified oxidation state. Some gold compounds exhibit aurophilic bonding , which describes
1792-514: A portion of their operating revenue through property taxation. Property taxes in Yellowknife are calculated through property assessment and the municipal and education mill rates. Mill rates in 2005 were 13.84 (residential) and 19.87 (commercial). Canadian North , a regional airline, was headquartered in Yellowknife, in the Northwest Tower in downtown. The airline announced that when its lease
1904-443: A purchased tag. The City of Yellowknife Solid Waste Management Facility is located on the Ingraham Trail (Highway 4) 2 km (1.2 mi) north of the city; salvaging is encouraged, and the dump is infamous for the number of still useful items often found in it. The City of Yellowknife provides pressurized potable water throughout the majority of the city, and has a network of gravity-fed sewage lines; trucked water and sewage
2016-401: A sheet of 1 square metre (11 sq ft), and an avoirdupois ounce into 28 square metres (300 sq ft). Gold leaf can be beaten thin enough to become semi-transparent. The transmitted light appears greenish-blue because gold strongly reflects yellow and red. Such semi-transparent sheets also strongly reflect infrared light, making them useful as infrared (radiant heat) shields in
2128-424: A small quantity of radioactive nuclear fuel was released into the environment, and Operation Morning Light —an attempt to retrieve it—was only partially successful. A new mining rush and fourth building boom in Yellowknife began with the discovery of diamonds 300 km (190 mi) north of the city in 1991. The Giant Mine was the subject of a bombing during a labour dispute in 1992 that resulted in one of
2240-517: A solution of Au(OH) 3 in concentrated H 2 SO 4 produces red crystals of gold(II) sulfate , Au 2 (SO 4 ) 2 . Originally thought to be a mixed-valence compound, it has been shown to contain Au 4+ 2 cations, analogous to the better-known mercury(I) ion, Hg 2+ 2 . A gold(II) complex, the tetraxenonogold(II) cation, which contains xenon as a ligand, occurs in [AuXe 4 ](Sb 2 F 11 ) 2 . In September 2023,
2352-470: Is Au with a half-life of 2.27 days. Gold's least stable isomer is Au with a half-life of only 7 ns. Au has three decay paths: β decay, isomeric transition , and alpha decay. No other isomer or isotope of gold has three decay paths. The possible production of gold from a more common element, such as lead , has long been a subject of human inquiry, and the ancient and medieval discipline of alchemy often focused on it; however,
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#17328815871022464-696: Is Au , which decays by proton emission with a half-life of 30 μs. Most of gold's radioisotopes with atomic masses below 197 decay by some combination of proton emission , α decay , and β decay . The exceptions are Au , which decays by electron capture, and Au , which decays most often by electron capture (93%) with a minor β decay path (7%). All of gold's radioisotopes with atomic masses above 197 decay by β decay. At least 32 nuclear isomers have also been characterized, ranging in atomic mass from 170 to 200. Within that range, only Au , Au , Au , Au , and Au do not have isomers. Gold's most stable isomer
2576-417: Is a chemical element with the chemical symbol Au (from Latin aurum ) and atomic number 79. In its pure form, it is a bright , slightly orange-yellow, dense, soft, malleable , and ductile metal . Chemically, gold is a transition metal , a group 11 element , and one of the noble metals . It is one of the least reactive chemical elements, being the second-lowest in the reactivity series . It
2688-648: Is also known, an example of a mixed-valence complex . Gold does not react with oxygen at any temperature and, up to 100 °C, is resistant to attack from ozone: Au + O 2 ⟶ ( no reaction ) {\displaystyle {\ce {Au + O2 ->}}({\text{no reaction}})} Au + O 3 → t < 100 ∘ C ( no reaction ) {\displaystyle {\ce {Au{}+O3->[{} \atop {t<100^{\circ }{\text{C}}}]}}({\text{no reaction}})} Some free halogens react to form
2800-520: Is also used in infrared shielding, the production of colored glass , gold leafing , and tooth restoration . Certain gold salts are still used as anti-inflammatory agents in medicine. Gold is the most malleable of all metals. It can be drawn into a wire of single-atom width, and then stretched considerably before it breaks. Such nanowires distort via the formation, reorientation, and migration of dislocations and crystal twins without noticeable hardening. A single gram of gold can be beaten into
2912-427: Is always richer at the exposed surface of gold-bearing veins, owing to the oxidation of accompanying minerals followed by weathering; and by washing of the dust into streams and rivers, where it collects and can be welded by water action to form nuggets. Gold sometimes occurs combined with tellurium as the minerals calaverite , krennerite , nagyagite , petzite and sylvanite (see telluride minerals ), and as
3024-513: Is attributed to wind-blown dust or rivers. At 10 parts per quadrillion, the Earth's oceans would hold 15,000 tonnes of gold. These figures are three orders of magnitude less than reported in the literature prior to 1988, indicating contamination problems with the earlier data. A number of people have claimed to be able to economically recover gold from sea water , but they were either mistaken or acted in an intentional deception. Prescott Jernegan ran
3136-548: Is done on a regular schedule by the City of Yellowknife public works department. Speed limits are 45 km/h (28 mph) on most roads, 30 km/h (19 mph) in school zones , and 70 to 100 km/h (43 to 62 mph) on highways. School zones and playground zones are in effect 24 hours per day, 7 days per week. The highway system in the NWT is maintained by the Government of
3248-464: Is found in ores in rock formed from the Precambrian time onward. It most often occurs as a native metal , typically in a metal solid solution with silver (i.e. as a gold/silver alloy ). Such alloys usually have a silver content of 8–10%. Electrum is elemental gold with more than 20% silver, and is commonly known as white gold . Electrum's color runs from golden-silvery to silvery, dependent upon
3360-592: Is home to most of the city's commercial activity, though some retail does exist in Range Lake. Industrial activity is limited to the Kam Lake and airport subdivisions. Jolliffe Island sits in Yellowknife Bay and is public land under the jurisdiction of the City of Yellowknife after a land purchase when Imperial Oil vacated the site. The island is surrounded by a community of houseboats, where people have been living off
3472-530: Is in the federal electoral riding of the Northwest Territories and has one Member of Parliament , Michael McLeod , and one Senator , Margaret Dawn Anderson . Yellowknife is home to seven of the 19 electoral districts in the Northwest Territories, the Frame Lake , Great Slave , Kam Lake , Range Lake , Yellowknife Centre , Yellowknife North and Yellowknife South ridings. As the largest city in
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3584-465: Is most often called the oldest since this treasure is the largest and most diverse. Gold artifacts probably made their first appearance in Ancient Egypt at the very beginning of the pre-dynastic period, at the end of the fifth millennium BC and the start of the fourth, and smelting was developed during the course of the 4th millennium; gold artifacts appear in the archeology of Lower Mesopotamia during
3696-528: Is now questioned. The gold-bearing Witwatersrand rocks were laid down between 700 and 950 million years before the Vredefort impact. These gold-bearing rocks had furthermore been covered by a thick layer of Ventersdorp lavas and the Transvaal Supergroup of rocks before the meteor struck, and thus the gold did not actually arrive in the asteroid/meteorite. What the Vredefort impact achieved, however,
3808-460: Is on the Canadian Shield , which was scoured down to rock during the last ice age . The surrounding landscape is very rocky and slightly rolling, with many small lakes in addition to the larger Great Slave Lake. Trees such as spruce and birch are abundant in the area, as are smaller bushes, but there are also many areas of relatively bare rock with lichen . Yellowknife's high latitude causes
3920-487: Is provided in areas not serviced by piped infrastructure. Sewage , with the aid of lift stations, is pumped to a series of lakes, referred to as Fiddler's Lake Lagoon, where it is held and allowed to naturally decompose. Water is obtained from the Yellowknife River and is disinfected with chlorine and liquid fluoride is added, but is not otherwise filtered or treated. Yellowknife, while isolated geographically, has
4032-427: Is red if the particles are small; larger particles of colloidal gold are blue. Gold has only one stable isotope , Au , which is also its only naturally occurring isotope, so gold is both a mononuclidic and monoisotopic element . Thirty-six radioisotopes have been synthesized, ranging in atomic mass from 169 to 205. The most stable of these is Au with a half-life of 186.1 days. The least stable
4144-553: Is resistant to most acids, though it does dissolve in aqua regia (a mixture of nitric acid and hydrochloric acid ), forming a soluble tetrachloroaurate anion . Gold is insoluble in nitric acid alone, which dissolves silver and base metals , a property long used to refine gold and confirm the presence of gold in metallic substances, giving rise to the term ' acid test '. Gold dissolves in alkaline solutions of cyanide , which are used in mining and electroplating . Gold also dissolves in mercury , forming amalgam alloys, and as
4256-484: Is similarly unaffected by most bases. It does not react with aqueous , solid , or molten sodium or potassium hydroxide . It does however, react with sodium or potassium cyanide under alkaline conditions when oxygen is present to form soluble complexes. Common oxidation states of gold include +1 (gold(I) or aurous compounds) and +3 (gold(III) or auric compounds). Gold ions in solution are readily reduced and precipitated as metal by adding any other metal as
4368-483: Is solid under standard conditions . Gold often occurs in free elemental ( native state ), as nuggets or grains, in rocks , veins , and alluvial deposits . It occurs in a solid solution series with the native element silver (as in electrum ), naturally alloyed with other metals like copper and palladium , and mineral inclusions such as within pyrite . Less commonly, it occurs in minerals as gold compounds, often with tellurium ( gold tellurides ). Gold
4480-724: Is staffed by the Canada Border Services Agency , it is certified for general aviation aircraft only. The Yellowknife airport is designated by the Royal Canadian Air Force (RCAF) as a forward operating location for the CF-18 Hornet . Despite its shorter runways, the airport can still accommodate 747s and other wide-body aircraft for emergency landings. Air traffic control services, Instrument landing system (Category 1), and radar services are provided by Nav Canada. YKTransit (formerly Yellowknife Transit)
4592-498: Is the public transportation agency in the city, operating three regular services Monday-Saturday and one express route on weekdays. It is the only transit system in the Northwest Territories. Road construction in Yellowknife is often a challenge due to the presence of permafrost which requires that roads generally be regraded and resurfaced every 10 to 20 years. Most roads in Yellowknife are paved and road width varies from 9 to 13.5 m (30 to 44 ft). Winter snow removal
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4704-585: Is the soluble form of gold encountered in mining. The binary gold halides , such as AuCl , form zigzag polymeric chains, again featuring linear coordination at Au. Most drugs based on gold are Au(I) derivatives. Au(III) (referred to as auric) is a common oxidation state, and is illustrated by gold(III) chloride , Au 2 Cl 6 . The gold atom centers in Au(III) complexes, like other d compounds, are typically square planar , with chemical bonds that have both covalent and ionic character. Gold(I,III) chloride
4816-634: Is thought to have been delivered to Earth by asteroid impacts during the Late Heavy Bombardment , about 4 billion years ago. Gold which is reachable by humans has, in one case, been associated with a particular asteroid impact. The asteroid that formed Vredefort impact structure 2.020 billion years ago is often credited with seeding the Witwatersrand basin in South Africa with the richest gold deposits on earth. However, this scenario
4928-505: Is thought to have been produced in supernova nucleosynthesis , and from the collision of neutron stars , and to have been present in the dust from which the Solar System formed. Traditionally, gold in the universe is thought to have formed by the r-process (rapid neutron capture) in supernova nucleosynthesis , but more recently it has been suggested that gold and other elements heavier than iron may also be produced in quantity by
5040-416: Is unaffected by most acids. It does not react with hydrofluoric , hydrochloric , hydrobromic , hydriodic , sulfuric , or nitric acid . It does react with selenic acid , and is dissolved by aqua regia , a 1:3 mixture of nitric acid and hydrochloric acid . Nitric acid oxidizes the metal to +3 ions, but only in minute amounts, typically undetectable in the pure acid because of the chemical equilibrium of
5152-645: The Chu (state) circulated the Ying Yuan , one kind of square gold coin. In Roman metallurgy , new methods for extracting gold on a large scale were developed by introducing hydraulic mining methods, especially in Hispania from 25 BC onwards and in Dacia from 106 AD onwards. One of their largest mines was at Las Medulas in León , where seven long aqueducts enabled them to sluice most of
5264-532: The Gahcho Kue Diamond Mine Project on the property formerly known as Kennady Lake . The mine was officially opened on 20 September 2016, and began commercial production in March 2017. As well, growth and expansion in natural gas development and exploration sectors has contributed to this growth. Economic growth in the Northwest Territories was 10.6% in 2003. The major employers in Yellowknife include
5376-583: The Old Testament , starting with Genesis 2:11 (at Havilah ), the story of the golden calf , and many parts of the temple including the Menorah and the golden altar. In the New Testament , it is included with the gifts of the magi in the first chapters of Matthew. The Book of Revelation 21:21 describes the city of New Jerusalem as having streets "made of pure gold, clear as crystal". Exploitation of gold in
5488-641: The Varna Necropolis near Lake Varna and the Black Sea coast, thought to be the earliest "well-dated" finding of gold artifacts in history. Several prehistoric Bulgarian finds are considered no less old – the golden treasures of Hotnitsa, Durankulak , artifacts from the Kurgan settlement of Yunatsite near Pazardzhik , the golden treasure Sakar, as well as beads and gold jewelry found in the Kurgan settlement of Provadia – Solnitsata ("salt pit"). However, Varna gold
5600-719: The Yellowknives Dene First Nation . They traded tools made from copper deposits near the Arctic Coast. Modern Yellowknives members can be found in city and in the adjoining, primarily Indigenous communities of Ndilǫ and Dettah . The city's population, which is ethnically mixed, was 20,340 per the 2021 Canadian Census . Of the eleven official languages of the Northwest Territories, five are spoken in significant numbers in Yellowknife: Dene Suline , Dogrib , South and North Slavey , English, and French. In
5712-445: The rain shadow of mountain ranges to the west. Due to its location on Great Slave Lake, Yellowknife has a frost-free growing season that averages slightly over 100 days. In an occasional year, the first fall frost does not come until October. Most of the limited precipitation falls between June and October, with April being the driest month of the year and August having the most rainfall. Snow that falls in winter accumulates on
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#17328815871025824-470: The reducing agent . The added metal is oxidized and dissolves, allowing the gold to be displaced from solution and be recovered as a solid precipitate. Less common oxidation states of gold include −1, +2, and +5. The −1 oxidation state occurs in aurides, compounds containing the Au anion . Caesium auride (CsAu), for example, crystallizes in the caesium chloride motif; rubidium, potassium, and tetramethylammonium aurides are also known. Gold has
5936-733: The Canadian capital city with the smallest population. On August 16, 2023, the territorial government began evacuating Yellowknife as wildfires approached the city, fearing that the Yellowknife Highway (Highway 3)—the main road leading into Yellowknife—would soon be inaccessible. The government also worked with homeless residents to assist them in evacuating. Air Canada and WestJet were initially criticized for high prices and unwaived cancellation fees for flights to and from Yellowknife, but they have since changed policies to alleviate financial burden for evacuees. Both carriers also increased
6048-458: The Dogrib language, the city is known as Sǫǫ̀mbak’è ( Athapascan pronunciation: [sõːᵐbakʼe] , "where the money is"). The Yellowknife settlement is considered to have been founded in 1934, after gold was found in the area, although commercial activity in the present-day waterfront area did not begin until 1936. Yellowknife quickly became the centre of economic activity in the NWT, and
6160-611: The Government of the Northwest Territories reported that the population was 20,834 with an average yearly growth rate of 0.6% from 2007. In Yellowknife, the population is slightly younger at 34.6 than the average age for the rest of the NWT which is 34.9. However, the population is slightly disproportionate in terms of age distribution compared to the national average of 41.0. As of the 2016 figures, 13.9% of residents were 9 or under, 6.0% were from 10 to 14 years old, 13.1% were from 15 to 24, 34.1.2% were from 25 to 44, 22.0% were from 45 to 59, and 10.9% were 60 or older. Gold Gold
6272-478: The NWT and Yellowknife is the main entry point for visitors. Many tourists come to experience the Northern climate and traditional lifestyle, as well as to see the aurora . In 2004–2005, visitors to the territory spent CA$ 100.5 million. The City of Yellowknife raises 50% of its operating revenue through property taxation . Both Yellowknife Education District No. 1 and Yellowknife Catholic School Board also raise
6384-481: The Northwest Territories and Nunavut. This ice road is usually open from the end of January through late March or early April, and Yellowknife becomes the dispatch point for the large number of truck drivers that come north to drive on the ice roads. During the 2007 ice road season, several drivers were featured on the History Channel TV series Ice Road Truckers . Tourism is the largest renewable industry in
6496-472: The Northwest Territories delegates powers to the municipality through legislative acts and regulations. Council meetings are held in the Council Chambers at City Hall on the second and fourth Monday of each month, and are open to the public. Municipal elections are held every three years. The current mayor of Yellowknife is Rebecca Alty, who succeeded Mark Heyck in 2018. Alty was elected 16 October 2018 and
6608-442: The Northwest Territories, Yellowknife is the hub for mining, industry, transportation, communications, education, health, tourism, commerce, and government activity in the territory. Historically, Yellowknife's economic growth came from gold mining, and later government; however, because of falling gold prices and increased operating costs, the final gold mine closed in 2004, marking a turning point for Yellowknife's economy. After
6720-429: The Northwest Territories. Highway 4 (Ingraham Trail) and Highway 3 (Yellowknife Highway) both run through Yellowknife and are all-weather roads. One well-known, almost infamous, road in Yellowknife is Ragged Ass Road , after which Tom Cochrane named an album. Until 2012, Yellowknife did not have a permanent road connection to the rest of Canada's highway network, as the Yellowknife Highway relied, depending on
6832-690: The Snare-Bluefish systems, provided by the Northwest Territories Power Corporation (NTPC). NTPC's local production capacity is 67.9 megawatts, 30.89 MW from 10 generators at the Jackfish Diesel Plant, 28.8 MW from Snare Lake, and 7.5 MW from Miramar Bluefish. Residential garbage removal is through a user pay system, in which residents are allowed three 77 L (17 imp gal; 20 US gal) garbage bags per week; any additional bags must have
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#17328815871026944-559: The Territorial Government, the Federal Government, Diavik Diamond Mines, Dominion Diamonds, DeBeers Canada, First Air , NorthwesTel , RTL Robinson Trucking, and the City of Yellowknife. Government employment accounts for 7,644 jobs, a large percentage of those in Yellowknife. During winter, the Tibbitt to Contwoyto Winter Road is opened for semi-trailer truck traffic to take supplies from Yellowknife north to various mines located in
7056-529: The area between David Lake and Rater Lake with few commercial results. The nearby hill known as Ranney Hill is his namesake and a popular hiking destination today. Con Mine was the most impressive gold deposit and its development created the excitement that led to the first settlement of Yellowknife in 1936–1937. Some of the first businesses were Corona Inn, Weaver & Devore Trading , Yellowknife Supplies and post office, and The Wildcat Cafe . Con Mine entered production on 5 September 1938. Yellowknife boomed in
7168-505: The city's fire, ambulance, rescue, and hazardous materials responses. A point of debate in recent years has been the implementation of 911 services in Yellowknife (currently one may now dial 911) through a partnership with five other Northwest Territories communities; the cost of installation is currently estimated at around $ 1 million a year. There have been a number of incidents where emergency services have been either misdirected, or improperly dispatched. Health services are provided through
7280-503: The city. On August 19, 2023, 87 percent of the city was evacuated as of 6:58 am (ET), with only 2,600 of the original 20,000 remaining, 1,000 of whom were essential workers. NWT Premier Caroline Cochrane announced that she had evacuated to Alberta to avoid taking up a space on one of the last planes to leave. The evacuation order was rescinded 6 September and Yellowknife residents began to return later that day. An estimated 1,000 people had been flown home by September 8. Yellowknife
7392-461: The coldest winter and longest snow cover season, along with the sunniest spring and summer, of any city in Canada. Yellowknife, like most other urban centres, has distinct commercial, industrial, and residential areas. Frame Lake, Niven Lake, Range Lake, and Old Town are the residential sectors, with some of the population living in high-rises in the downtown core. Niven Lake is the only area under active development and expansion. Downtown Yellowknife
7504-610: The community is the historic and traditional home of the Yellowknives Dene, the land's First Nations residents. Dettah was the first formal settlement in the area, which was founded by the Yellowknives in the 1930s and located on a point of land on the east side of Yellowknife Bay. The name Dettah means Burnt Point and refers to a traditional fishing camp that the Dene used for hundreds of years. The current municipal area of Yellowknife
7616-1409: The corresponding gold halides. Gold is strongly attacked by fluorine at dull-red heat to form gold(III) fluoride AuF 3 . Powdered gold reacts with chlorine at 180 °C to form gold(III) chloride AuCl 3 . Gold reacts with bromine at 140 °C to form a combination of gold(III) bromide AuBr 3 and gold(I) bromide AuBr, but reacts very slowly with iodine to form gold(I) iodide AuI: 2 Au + 3 F 2 → Δ 2 AuF 3 {\displaystyle {\ce {2Au{}+3F2->[{} \atop \Delta ]2AuF3}}} 2 Au + 3 Cl 2 → Δ 2 AuCl 3 {\displaystyle {\ce {2Au{}+3Cl2->[{} \atop \Delta ]2AuCl3}}} 2 Au + 2 Br 2 → Δ AuBr 3 + AuBr {\displaystyle {\ce {2Au{}+2Br2->[{} \atop \Delta ]AuBr3{}+AuBr}}} 2 Au + I 2 → Δ 2 AuI {\displaystyle {\ce {2Au{}+I2->[{} \atop \Delta ]2AuI}}} Gold does not react with sulfur directly, but gold(III) sulfide can be made by passing hydrogen sulfide through
7728-477: The deadliest mass murders in Canada with 9 deaths. The last of the gold mines in Yellowknife closed in 2004. Today, Yellowknife is primarily a government town and a service centre for the diamond mines. On 1 April 1999, its purview as capital of the NWT was reduced when the territory of Nunavut was split from the NWT. As a result, jurisdiction for that region of Canada was transferred to the new capital city of Iqaluit . Consequently, Yellowknife lost its standing as
7840-424: The densest element, osmium , is 22.588 ± 0.015 g/cm . Whereas most metals are gray or silvery white, gold is slightly reddish-yellow. This color is determined by the frequency of plasma oscillations among the metal's valence electrons, in the ultraviolet range for most metals but in the visible range for gold due to relativistic effects affecting the orbitals around gold atoms. Similar effects impart
7952-422: The early 1930s, and prospectors began fanning out to find additional metals. In 1933 two prospectors, Herb Dixon and Johnny Baker, canoed down the Yellowknife River from Great Bear Lake to survey for possible mineral deposits. They found gold samples at Quyta Lake, about 30 km (19 mi) up the Yellowknife River, and some additional samples at Homer Lake. The following year, Johnny Baker returned as part of
8064-664: The early 4th millennium. As of 1990, gold artifacts found at the Wadi Qana cave cemetery of the 4th millennium BC in West Bank were the earliest from the Levant. Gold artifacts such as the golden hats and the Nebra disk appeared in Central Europe from the 2nd millennium BC Bronze Age . The oldest known map of a gold mine was drawn in the 19th Dynasty of Ancient Egypt (1320–1200 BC), whereas
8176-574: The first written reference to gold was recorded in the 12th Dynasty around 1900 BC. Egyptian hieroglyphs from as early as 2600 BC describe gold, which King Tushratta of the Mitanni claimed was "more plentiful than dirt" in Egypt. Egypt and especially Nubia had the resources to make them major gold-producing areas for much of history. One of the earliest known maps, known as the Turin Papyrus Map , shows
8288-403: The gold acts simply as a solute, this is not a chemical reaction . A relatively rare element, gold is a precious metal that has been used for coinage , jewelry , and other works of art throughout recorded history . In the past, a gold standard was often implemented as a monetary policy . Gold coins ceased to be minted as a circulating currency in the 1930s, and the world gold standard
8400-557: The grid since 1978. Their relationship with the city is complex and often strained as the houseboats are popular with sightseers, but at the same time their residents live outside of the city's tax jurisdiction while still using city services, leading to lawsuits and tensions with the City of Yellowknife. Yellowknife has a municipal government system and is governed by the Yellowknife City Council , which consists of an elected mayor and eight councillors . The Government of
8512-516: The ground until the spring thaw. Yellowknife experiences very cold winters and mild to warm summers. The average temperature in January is around −26 °C (−15 °F) and 17 °C (63 °F) in July. According to Environment and Climate Change Canada , Yellowknife has the sunniest summer in the country, averaging 1,034 hours from June to August. The lowest temperature ever recorded in Yellowknife
8624-563: The highest electron affinity of any metal, at 222.8 kJ/mol, making Au a stable species, analogous to the halides . Gold also has a –1 oxidation state in covalent complexes with the group 4 transition metals, such as in titanium tetraauride and the analogous zirconium and hafnium compounds. These chemicals are expected to form gold-bridged dimers in a manner similar to titanium(IV) hydride . Gold(II) compounds are usually diamagnetic with Au–Au bonds such as [ Au(CH 2 ) 2 P(C 6 H 5 ) 2 ] 2 Cl 2 . The evaporation of
8736-423: The independent Yellowknife Telephone Company, owned by investors mostly within the community. The system was sold at the end of 1963 to Canadian National Telecommunications , now Northwestel. Northwestel also provides manual mobile telephone service on VHF frequencies, and by the 1990s also provided cellular services that were later transferred to Bell Mobility . In 2008, northern-based company Ice Wireless entered
8848-432: The link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=YK&oldid=1147594826 " Category : Disambiguation pages Hidden categories: Short description is different from Wikidata All article disambiguation pages All disambiguation pages Yellowknife, Northwest Territories Yellowknife is the capital, largest community, and
8960-495: The local Stanton Territorial Hospital . The Yellowknife Primary Care Centre has a broad range of practitioners including physicians, nurse practitioners, nurses, counsellors, dieticians and more. Services provided at the Yellowknife Primary Care Centre include mental health, diabetes education, diagnostic imaging, psychiatry and some home care services. Yellowknife's telephone services were established in 1947 by
9072-557: The market in Yellowknife, providing digital cellular products and services. Yellowknife's television services, in addition to over-the-air transmission begun in 1967, included the Mackenzie Media cable television system placed in service 1 September 1972, which was sold to Northwestel in late 1995. Electricity is provided to Yellowknife by Northland Utilities , serving 6,350 residential and 800 commercial customers. Yellowknife operates almost entirely on hydroelectricity from
9184-542: The mineral quartz, and gold out of the fluids and onto nearby surfaces. The world's oceans contain gold. Measured concentrations of gold in the Atlantic and Northeast Pacific are 50–150 femtomol /L or 10–30 parts per quadrillion (about 10–30 g/km ). In general, gold concentrations for south Atlantic and central Pacific samples are the same (~50 femtomol/L) but less certain. Mediterranean deep waters contain slightly higher concentrations of gold (100–150 femtomol/L), which
9296-411: The noble metals, it still forms many diverse compounds. The oxidation state of gold in its compounds ranges from −1 to +5, but Au(I) and Au(III) dominate its chemistry. Au(I), referred to as the aurous ion, is the most common oxidation state with soft ligands such as thioethers , thiolates , and organophosphines . Au(I) compounds are typically linear. A good example is Au(CN) − 2 , which
9408-586: The north-northeast of Yellowknife from 1950 to 1969. Between 1939 and 1953, Yellowknife Administration district was controlled by the Northern Affairs department (now Crown–Indigenous Relations and Northern Affairs Canada) of the Government of Canada . A small council, partially elected and partially appointed, made decisions. By 1953, Yellowknife had grown so much that it was made a municipality, with its own council and town hall. The first mayor of Yellowknife
9520-412: The number of flights to Yellowknife. The smoke from the 236 active wildfires in the Northwest Territories spread quickly across Canada due to powerful winds and was compared by news sources to the 2023 Hawaii wildfires , which similarly started in a dry and windy environment. As of August 17, 2023 , the fire was 162,936 ha (402,620 acres) in size, at 16 km (9.9 mi) distance from
9632-533: The only city in the Northwest Territories , Canada. It is on the northern shore of Great Slave Lake , about 400 km (250 mi) south of the Arctic Circle , on the west side of Yellowknife Bay near the outlet of the Yellowknife River . Yellowknife and its surrounding water bodies were named after a local Dene tribe, who were known as the "Copper Indians" or "Yellowknife Indians", today incorporated as
9744-563: The plan of a gold mine in Nubia together with indications of the local geology . The primitive working methods are described by both Strabo and Diodorus Siculus , and included fire-setting . Large mines were also present across the Red Sea in what is now Saudi Arabia . Gold is mentioned in the Amarna letters numbered 19 and 26 from around the 14th century BC. Gold is mentioned frequently in
9856-459: The project. The earliest recorded metal employed by humans appears to be gold, which can be found free or " native ". Small amounts of natural gold have been found in Spanish caves used during the late Paleolithic period, c. 40,000 BC . The oldest gold artifacts in the world are from Bulgaria and are dating back to the 5th millennium BC (4,600 BC to 4,200 BC), such as those found in
9968-681: The r-process in the collision of neutron stars . In both cases, satellite spectrometers at first only indirectly detected the resulting gold. However, in August 2017, the spectroscopic signatures of heavy elements, including gold, were observed by electromagnetic observatories in the GW170817 neutron star merger event, after gravitational wave detectors confirmed the event as a neutron star merger. Current astrophysical models suggest that this single neutron star merger event generated between 3 and 13 Earth masses of gold. This amount, along with estimations of
10080-620: The rare bismuthide maldonite ( Au 2 Bi ) and antimonide aurostibite ( AuSb 2 ). Gold also occurs in rare alloys with copper , lead , and mercury : the minerals auricupride ( Cu 3 Au ), novodneprite ( AuPb 3 ) and weishanite ( (Au,Ag) 3 Hg 2 ). A 2004 research paper suggests that microbes can sometimes play an important role in forming gold deposits, transporting and precipitating gold to form grains and nuggets that collect in alluvial deposits. A 2013 study has claimed water in faults vaporizes during an earthquake, depositing gold. When an earthquake strikes, it moves along
10192-420: The rate of occurrence of these neutron star merger events, suggests that such mergers may produce enough gold to account for most of the abundance of this element in the universe. Because the Earth was molten when it was formed , almost all of the gold present in the early Earth probably sank into the planetary core . Therefore, as hypothesized in one model, most of the gold in the Earth's crust and mantle
10304-935: The reaction. However, the ions are removed from the equilibrium by hydrochloric acid, forming AuCl − 4 ions, or chloroauric acid , thereby enabling further oxidation: 2 Au + 6 H 2 SeO 4 → 200 ∘ C Au 2 ( SeO 4 ) 3 + 3 H 2 SeO 3 + 3 H 2 O {\displaystyle {\ce {2Au{}+6H2SeO4->[{} \atop {200^{\circ }{\text{C}}}]Au2(SeO4)3{}+3H2SeO3{}+3H2O}}} Au + 4 HCl + HNO 3 ⟶ HAuCl 4 + NO ↑ + 2 H 2 O {\displaystyle {\ce {Au{}+4HCl{}+HNO3->HAuCl4{}+NO\uparrow +2H2O}}} Gold
10416-464: The rest of the gold on Earth is thought to have been incorporated into the planet since its very beginning, as planetesimals formed the mantle . In 2017, an international group of scientists established that gold "came to the Earth's surface from the deepest regions of our planet", the mantle, as evidenced by their findings at Deseado Massif in the Argentinian Patagonia . On Earth, gold
10528-474: The same result and showing that the isotopes of gold produced by it were all radioactive . In 1980, Glenn Seaborg transmuted several thousand atoms of bismuth into gold at the Lawrence Berkeley Laboratory. Gold can be manufactured in a nuclear reactor, but doing so is highly impractical and would cost far more than the value of the gold that is produced. Although gold is the most noble of
10640-533: The season, on ferry service or an ice road to cross the Mackenzie River . With the completion of the Deh Cho Bridge , which officially opened on 30 November 2012, the city now has its first direct road connection to the rest of the country. One still-used ice road connects Yellowknife with the neighbouring community of Dettah , 6.5 km (4.0 mi) to the southeast across an arm of Great Slave Lake; or
10752-486: The silver content. The more silver, the lower the specific gravity . Native gold occurs as very small to microscopic particles embedded in rock, often together with quartz or sulfide minerals such as " fool's gold ", which is a pyrite . These are called lode deposits. The metal in a native state is also found in the form of free flakes, grains or larger nuggets that have been eroded from rocks and end up in alluvial deposits called placer deposits . Such free gold
10864-446: The south-east corner of the Black Sea is said to date from the time of Midas , and this gold was important in the establishment of what is probably the world's earliest coinage in Lydia around 610 BC. The legend of the golden fleece dating from eighth century BCE may refer to the use of fleeces to trap gold dust from placer deposits in the ancient world. From the 6th or 5th century BC,
10976-468: The summer of 1938 and many new businesses were established, including the Canadian Bank of Commerce , Hudson's Bay Company , Vic Ingraham's first hotel, Sutherland's Drug Store, and a pool hall. The population of Yellowknife quickly grew to 1,000 by 1940, and by 1942, five gold mines were in production in the Yellowknife region. However, by 1944, gold production had ground to a halt as men were needed for
11088-436: The tendency of gold ions to interact at distances that are too long to be a conventional Au–Au bond but shorter than van der Waals bonding . The interaction is estimated to be comparable in strength to that of a hydrogen bond . Well-defined cluster compounds are numerous. In some cases, gold has a fractional oxidation state. A representative example is the octahedral species {Au( P(C 6 H 5 ) 3 )} 2+ 6 . Gold
11200-403: The transmutation of the chemical elements did not become possible until the understanding of nuclear physics in the 20th century. The first synthesis of gold was conducted by Japanese physicist Hantaro Nagaoka , who synthesized gold from mercury in 1924 by neutron bombardment. An American team, working without knowledge of Nagaoka's prior study, conducted the same experiment in 1941, achieving
11312-449: The two operating mines in 2004 was 12,618,000 carats (2,523.6 kg; 5,563.6 lb), valued at over CA$ 2.1 billion. This ranked Canada third in world diamond production by value, and sixth by weight. A third mine, the De Beers owned Snap Lake Diamond Mine , received final approval and funding in 2005 and went into production in 2007. De Beers also applied in 2005 for a permit to open
11424-659: The vicinity. Most mines in the Yellowknife area are within the Kam Group, a part of the Yellowknife greenstone belt . Policing in Yellowknife is provided by the Royal Canadian Mounted Police (RCMP); Yellowknife is the headquarters for G Division, and houses more than 30 officers. The City of Yellowknife Municipal Enforcement Division (MED) is responsible for municipal bylaw infractions and traffic infractions (within city limits). The Yellowknife Fire Department handles
11536-417: The visors of heat-resistant suits and in sun visors for spacesuits . Gold is a good conductor of heat and electricity . Gold has a density of 19.3 g/cm , almost identical to that of tungsten at 19.25 g/cm ; as such, tungsten has been used in the counterfeiting of gold bars , such as by plating a tungsten bar with gold. By comparison, the density of lead is 11.34 g/cm , and that of
11648-661: The war effort . An exploration program at the Giant Mine property on the north end of town had suggested a sizable gold deposit in 1944. This new find resulted in a massive post-war staking rush to Yellowknife. It also resulted in new discoveries at the Con Mine, greatly extending the life of the mine. The Yellowknife townsite expanded from the Old Town waterfront, and the new townsite was established during 1945–1946. The Discovery Mine , with its own townsite, operated 81 km (50 mi) to
11760-465: Was Jock McNiven . In September 1967, Yellowknife officially became the capital of the Northwest Territories . This important new status sparked what has been coined as the third boom in Yellowknife. New sub-divisions were established to house an influx of government workers. In 1978 the Soviet nuclear-powered satellite Kosmos 954 crashed to Earth near Yellowknife. There were no known casualties, although
11872-783: Was abandoned for a fiat currency system after the Nixon shock measures of 1971. In 2020, the world's largest gold producer was China, followed by Russia and Australia. As of 2020 , a total of around 201,296 tonnes of gold exist above ground. This is equal to a cube, with each side measuring roughly 21.7 meters (71 ft). The world's consumption of new gold produced is about 50% in jewelry, 40% in investments , and 10% in industry . Gold's high malleability, ductility, resistance to corrosion and most other chemical reactions, as well as conductivity of electricity have led to its continued use in corrosion-resistant electrical connectors in all types of computerized devices (its chief industrial use). Gold
11984-575: Was first occupied by prospectors who ventured into the region in the mid-1930s. A Klondike -bound prospector, E.A. Blakeney, made the first discovery of gold in the Yellowknife Bay area in 1898. The discovery was viewed as unimportant in those days because of the Klondike Gold Rush and because Great Slave Lake was too far away to attract attention. In the late 1920s, aircraft were first used to explore Canada's Arctic regions. Samples of uranium and silver were uncovered at Great Bear Lake in
12096-425: Was named the capital of the Northwest Territories in 1967. As gold production began to wane, Yellowknife shifted from being a mining town to a centre of government services in the 1980s. However, with the discovery of diamonds north of the city in 1991, this shift began to reverse. In recent years, tourism, transportation, and communications have also emerged as significant Yellowknife industries. The area around
12208-643: Was sworn in 5 November. Yellowknife is represented in the territorial government by seven of the 19 members of the Legislative Assembly of the Northwest Territories . These members, referred to as MLAs, are elected every four years and sit in the Northwest Territories Legislative Building , located in Yellowknife. The MLAs elect the Speaker of the House as well as six cabinet ministers and
12320-605: Was to distort the Witwatersrand basin in such a way that the gold-bearing rocks were brought to the present erosion surface in Johannesburg , on the Witwatersrand , just inside the rim of the original 300 km (190 mi) diameter crater caused by the meteor strike. The discovery of the deposit in 1886 launched the Witwatersrand Gold Rush . Some 22% of all the gold that is ascertained to exist today on Earth has been extracted from these Witwatersrand rocks. Much of
12432-500: Was to expire in the end of August 2013, the airline will vacate the office and move it and 20 employees out of Yellowknife. The airline is now headquartered in Calgary . Yellowknife was originally established as a supply centre for numerous gold mines operating in the region in the late 1930s and early 1940s. The following is a list of the major mines, all of which are now closed. There were also tungsten , tantalum and uranium mines in
12544-559: Was −51.2 °C (−60.2 °F) on 31 January 1947, and the highest was 32.6 °C (90.7 °F) on 2 August 2021. Yellowknife averages 2256.5 hours of bright sunshine per year or 43.5% of possible daylight hours, ranging from a low of 15.4% in December to a high of 63.0% in June. Due to its warm summer temperatures, Yellowknife is well below the Arctic tree line in stark contrast to areas farther east in Canada on similar parallels. In 2014, Environment Canada ranked Yellowknife as having
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