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85-651: The Aravalli Mountain Range is a northeast-southwest trending orogenic belt in the northwest part of India and is part of the Indian Shield that was formed from a series of cratonic collisions. The Aravalli Mountains consist of the Aravalli and Delhi fold belts, and are collectively known as the Aravalli-Delhi orogenic belt. The whole mountain range is about 700 km long. Unlike the much younger Himalayan section nearby,

170-455: A Precambrian event called the Aravalli - Delhi Orogen . The Aravalli Range is a northeast–southwest trending orogenic belt located in the northwestern part of Indian Peninsula. It is part of the Indian Shield that formed from a series of cratonic collisions. In ancient times, Aravalli were extremely high but since have worn down almost completely from millions of years of weathering , whereas

255-449: A lacustrine environment or in a restricted marine environment, although not all rifts contain such sequences. Reservoir rocks may be developed in pre-rift, syn-rift and post-rift sequences. Effective regional seals may be present within the post-rift sequence if mudstones or evaporites are deposited. Just over half of estimated oil reserves are found associated with rifts containing marine syn-rift and post-rift sequences, just under

340-498: A rigid indentor which controlled the overall wedge shaped geometry of the orogen. Lithology of area shows that the base rocks of Aravalli are of Mewar Gneiss formed by high-grade regional metamorphic processes from preexisting formations that were originally sedimentary rock with earliest life form that were formed during the archean eon, these contain fossils of unicellular organism such as green algae and cyanobacteria in stromatolitic carbonate ocean reefs formed during

425-507: A shelf depositional environment. Turbidite facies and argillaceous rocks are prominent in the upper Jharol group, thus suggesting a deep marine depositional environment. The depositional age of these sequences ranges approximately from 2.1 to 1.9 Ga. Three major episodes of deformation and metamorphism were involved in the Aravalli Supergroup, including foldings , shearing , kink bands and crenulations etc. Metamorphic grades of

510-502: A buffer against pollution, 51% of which is caused by the industrial pollution, 27% by vehicles, 8% by crop burning and 5% by diwali fireworks . It was proposed several times form the 1990s, but as of 2024 the project is still in the planning stage. The Sariska–Delhi leopard wildlife corridor or the Northern Aravalli leopard wildlife corridor is a 200 km long important biodiversity and wildlife corridor which runs from

595-478: A compressional phase was concurrent with the assembly of Rodinia . The deposition of the upper Vindhyan Supergroup may also denote the final episode of Rodinia formation. Several geochemical analyses show that detrital zircon samples obtained from the Marwar basin are highly linked to the breakup phase of Rodinia and the assembly phase of Gondwana . Aravalli Range The Aravalli Range (also spelled Aravali )

680-566: A convergent plate boundary) of the oceanic crust along the Rakhabdev lineament, flattening and eventual wrenching (also called strike-slip plate fault, sideways horizontal movement of colliding plates with no vertical motion) parallel to the collision zone. Associated mafic igneous rocks show both continental and oceanic tholeiitic geochemistry (magnesium and iron-rich igneous rocks) from phanerozoic eon (541–0 million) with rift-related magmatic rock formations. The Aravalli-Delhi Orogen

765-524: A craton where basement rock crops out at the surface and it is the relatively oldest and most stable part that are undeformed by the plate tectonics . The Aravalli Craton (Marwar-Mewar Craton or Western Indian Craton) covers Rajasthan as well as western and southern Haryana . It includes the Mewar Craton in the east and Marwar Craton in the west. It is limited by the Great Boundary Fault in

850-403: A kind of orogeneses in extensional settings, which is referred as to rifting orogeny. Once rifting ceases, the mantle beneath the rift cools and this is accompanied by a broad area of post-rift subsidence. The amount of subsidence is directly related to the amount of thinning during the rifting phase calculated as the beta factor (initial crustal thickness divided by final crustal thickness), but

935-582: A law. This amendment will reduce the Haryana's Natural Conservation Zones (NCZs) by 47% or 60,000 acres from 122,113.30 hectares to only 64,384.66 hectares. This is in violation of multiple guidelines of the Supreme Court of India as well as " NCR Planning Board " (NCRPB) notification which states the original 122,113.30 hectares ecologically sensitive forest of South Haryana is a forest, "The major natural features, identified as environmentally sensitive areas, are

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1020-438: A mid-oceanic ridge and a set of conjugate margins separated by an oceanic basin. Rifting may be active, and controlled by mantle convection . It may also be passive, and driven by far-field tectonic forces that stretch the lithosphere. Margin architecture develops due to spatial and temporal relationships between extensional deformation phases. Margin segmentation eventually leads to the formation of rift domains with variations of

1105-524: A rigid Archaean continent banded gneissic complex around 2.2 Ga with the coexisting formation of the Bhilwara aulacogen in its eastern part and eventual rupturing and separation of the continent along a line parallel to the Rakhabdev (Rishabhdev) lineament to the west, simultaneous development of a passive continental margin with the undersea shelf rise sediments of the Aravalli-Jharol belts depositing on

1190-468: A single basin-bounding fault. Segment lengths vary between rifts, depending on the elastic thickness of the lithosphere. Areas of thick colder lithosphere, such as the Baikal Rift have segment lengths in excess of 80 km, while in areas of warmer thin lithosphere, segment lengths may be less than 30 km. Along the axis of the rift the position, and in some cases the polarity (the dip direction), of

1275-523: Is a mountain range in Northern - Western India , running approximately 670 km (420 mi) in a south-west direction, starting near Delhi , passing through southern Haryana , Rajasthan , and ending in Ahmedabad Gujarat . The highest peak is Guru Shikhar on Mount Abu at 1,722 m (5,650 ft). The Aravalli Range is one of the oldest geological features on Earth , having its origin in

1360-546: Is about 2.5 Ga old. It is made up of a group of metamorphic and igneous rocks that are mainly amphibolite to granulite grade, tonalitic to granodioritic gneisses and intrusive granitoids with a minor amount of metasedimentary and metavolcanic rocks . The basement is categorized into two subdivisions: the Sandmata Complex and the Mangalwar Complex. The Sandmata Complex refers to gneisses and granitoids while

1445-779: Is along the Ferozpure Jhirka-Nuh Aravali range as well as Delhi South Ridge (Faridabad-Gurugram) to Farrukhnagar area on the Delhi–Haryana border, with reports of sightings in Saidpur, Lokri and Jhund Sarai Viran villages near the KMP expressway; Bhukarka 7 km from Pataudi; Pathkori, Bhond, Mandawar in Ferozepur Jirka region. In May 1992, some parts of the Aravalli hills in Rajasthan and Haryana were protected from mining through

1530-402: Is also affected by the degree to which the rift basin is filled at each stage, due to the greater density of sediments in contrast to water. The simple 'McKenzie model' of rifting, which considers the rifting stage to be instantaneous, provides a good first order estimate of the amount of crustal thinning from observations of the amount of post-rift subsidence. This has generally been replaced by

1615-470: Is an orogen event that led to a large structural deformation of the Earth's lithosphere (crust and uppermost mantle, such as Aravalli and Himalayas fold mountains) due to the interaction between tectonic plates when a continental plate is crumpled and is pushed upwards to form mountain ranges, and involve a great range of geological processes collectively called orogenesis . The archean basement had served as

1700-490: Is approximately from 1.7 to 1.5 Ga. In the ‘North Delhi belt’, the Delhi Supergroup is classified into three groups: lower Raialo Group, middle Alwar Group, and upper Ajabgarh Group. The Raialo Group consists predominantly of mafic volcanic and calcareous rocks. The Alwar Group mainly consists of arenaceous and mafic volcanic rocks. The Ajabgarh Group is dominated by carbonate, mafic volcanic and argillaceous rocks. In

1785-674: The Aravalli Supergroup and Delhi Supergroup . These two supergroups rest over the Archean Bhilwara Gneissic Complex basement , which is a gneissic (high-grade metamorphism of sedimentary or igneous rocks) basement formed during the archean eon 4 Ga ago. It started as an inverted basin , that rifted and pulled apart into granitoid basement , initially during Aravalli passive rifting around 2.5 to 2.0 Ga years ago and then during Delhi active rifting around 1.9 to 1.6 Ga years ago. It started with rifting of

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1870-614: The Geological Survey of India to declare the site as a National Geological Monument . Tectonic-stratigraphic evolution of the Aravalli Range: The stratigraphic classification of the Aravalli Range can be divided into the following parts (north to south direction): The Aravalli Range has been site of three broad stages of human history, early Stone Age saw the use of flint stones; mid-Stone Age starting from 20,000 BP saw

1955-612: The Himalayas , young fold mountains, are still continuously rising. Aravalli have stopped growing higher due to the cessation of upward thrust caused by the tectonic plates in the Earth's crust below them. The Aravalli Range joins two of the ancient Earth's crust segments that make up the greater Indian craton , the Aravalli Craton which is the Marwar segment of Earth's crust to the northwest of

2040-469: The Moho topography, including proximal domain with fault-rotated crustal blocks, necking zone with thinning of crustal basement , distal domain with deep sag basins, ocean-continent transition and oceanic domain. Deformation and magmatism interact during rift evolution. Magma-rich and magma-poor rifted margins may be formed. Magma-rich margins include major volcanic features. Globally, volcanic margins represent

2125-500: The Proterozoic era. The Aravalli Range is rich in natural resources and serves as check to the growth of the western desert. Aravalli, a composite Sanskrit word from the roots "ara" and "vali" , literally means the "line of peaks" . The Aravalli Range, an eroded stub of ancient mountains, is believed to be the oldest range of fold mountains in India. The natural history of

2210-609: The Rann of Kutch . "The Great Green Wall of Aravalli" is a proposed 1,600 km long and 5 km wide green ecological corridor along Aravalli range from Gujarat to Delhi, it will be connected to Shivalik hill range and 1.35 billion (135 crore) new native trees will be planted over 10 years to rehabilitate the forest cover in this area. To be implemented on a concept similar to the Great Green Wall of Sahara in Africa, it will act as

2295-583: The Sariska Tiger Reserve in Rajasthan to Delhi Ridge. This corridor is an important habitat for the Indian leopards and jackals of Aravalli. In January 2019, the Wildlife Institute of India announced that they will undertake the survey of leopard and wildlife, using pugmarks and trap cameras, subsequently, leopards and jackals will be tracked via the radio collars . Urban development, especially

2380-620: The paleoproterozoic era . Sedimentary exhalative deposits of base metal sulfide ores formed extensively along several, long, linear zones in the Bhilwara aulacogen or produced local concentration in the rifted Aravalli continental margin, where rich stromatolitic phosphorites also formed. Tectonic evolution of the Aravalli Mountains shows Mewar Gneiss rocks are overlain by Delhi Supergroup type of rocks that also have post-Aravalli intrusions. Metal sulfide ores were formed in two different epochs, lead and zinc sulfide ores were formed in

2465-645: The 'flexural cantilever model', which takes into account the geometry of the rift faults and the flexural isostasy of the upper part of the crust. Some rifts show a complex and prolonged history of rifting, with several distinct phases. The North Sea rift shows evidence of several separate rift phases from the Permian through to the Earliest Cretaceous , a period of over 100 million years. Rifting may lead to continental breakup and formation of oceanic basins. Successful rifting leads to seafloor spreading along

2550-637: The Aravalli Mountains are believed much older and can be traced back to the Proterozoic Eon. They are arguably the oldest geological feature on Earth. The collision between the Bundelkhand craton and the Marwar craton is believed to be the primary mechanism for the development of the mountain range. The precise evolutionary processes responsible for the Aravalli Mountain Range remains controversial today, and there are diverse theories put forward for

2635-645: The Aravalli Range dates back to times when the Indian Plate was separated from the Eurasian Plate by an ocean. The Proterozoic Aravalli-Delhi orogenic belt in northwest India is similar to the younger Himalayan-type orogenic belts of the Mesozoic - Cenozoic era (of the Phanerozoic ) in terms of component parts and appears to have passed through a near-orderly Wilson supercontinental cycle of events . The range rose in

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2720-632: The Aravalli Range, and the Bundelkand Craton segment of the Earth's crust to the southeast of the Aravalli Range. Cratons, generally found in the interiors of tectonic plates, are old and stable parts of the continental lithosphere that have remained relatively undeformed during the cycles of merging and rifting of continents. It consists of two main sequences formed in the Proterozoic eon , metasedimentary rock (sedimentary rocks metamorphosed under pressure and heat without melting) and metavolcanic rock (metamorphosed volcanic rocks) sequences of

2805-463: The Aravalli Range. The Aravalli Range has several forests with a diversity of environment. The Aravalli Range is rich in wildlife. The first-ever 2017 wildlife survey of a 200 square kilometre area crossing five districts (Gurgaon, Faridabad, Mewat, Rewari and Mahendergarh) of Haryana by the Wildlife Institute of India (WII) found 14 species, including leopards , striped hyena (7 sightings), golden jackal (9 sightings, with 92% occupancy across

2890-418: The Aravalli and the lack of an integrated Aravalli management agency are the major causes of concern. Rift Major rifts occur along the central axis of most mid-ocean ridges , where new oceanic crust and lithosphere is created along a divergent boundary between two tectonic plates . Failed rifts are the result of continental rifting that failed to continue to the point of break-up. Typically

2975-554: The Aravalli range dates back to at least the 5th century BCE, based on carbon dating . Recent research indicates that copper was already mined here during the Sothi - Siswal period going back to c.  4000 BCE . Ancient Kalibangan and Kunal, Haryana settlements obtained copper here. The Indian Craton includes five major cratons . Cratons are part of continental crust made up of upper layer called platforms and older bottom layer called basement rocks . shields are part of

3060-463: The Aravalli-Delhi orogenic belt. During Proterozoic Eon, N-S convergence between the Bundelkhand and Bhandara cratons at the Satpura Mobile Belt, and E-W convergence between the Bundelkhand and Marwar cratons at the Aravalli-Delhi orogenic belt have synchronously occurred in India. This resulted in an overall resultant force of NE-SW convergence of the Aravalli-Delhi orogenic belt, and also led to

3145-544: The Bundelkhand-Aravalli-BGC and the Marwar craton lie on the eastern side and western side respectively as the rifting phase separated the Bhilwara Gneissic Complex (BGC) from the Marwar craton. The oceanic basin created in the course of rifting received the Delhi Supergroup sediments. The compressional phase that followed led to eastward subduction of the western Marwar craton. Continuous subduction of

3230-701: The Central Rajasthan region, Sharma states that the presence of some mining has had both positive and negative effects on neighboring agriculture and the ecosystem. The rain-induced erosion brings nutrients as well as potential contaminants. The Aravali Range is the source area of many rivers, resulting in development of human settlements with sustainable economy since pre-historic times. The Delhi–Mumbai Industrial Corridor Project , Western Dedicated Freight Corridor , Mumbai–Ahmedabad high-speed rail corridor , North Western Railway network, Jaipur–Kishangarh Expressway and Delhi–Jaipur Expressway , all run parallel to

3315-678: The Ecologically Sensitive Areas clauses of Indian laws. In 2003, the central government of India prohibited mining operations in these areas. In 2004, India's Supreme Court banned mining in the notified areas of Aravalli Range. In May 2009, the Supreme Court extended the ban on mining in an area of 448 km across the Faridabad , Gurgaon and Mewat districts in Haryana , covering the Aravalli Range. A 2013 report used high-resolution Cartosat-1 and LISS-IV satellite imaging to determine

3400-594: The Mangalwar Complex refers to the metasedimentary and metavolcanic series which are considered to be metamorphosed older granite-greenstone belt . On top of the Archean basement, the Aravalli Supergroup overlies with clear unconformities separating the two strata. The Aravalli Supergroup is divided into three groups: lower Delwara Group, middle Debari Group, and Upper Jharol Group. The lower and middle groups shared similar lithology, where both groups are dominated by carbonates , quartzite , and pelitic rocks, thus suggesting

3485-761: The Semri Group while the upper Vinhyan consists of the Kaimur Group, Rewa Group, and Bhander Group. The earliest sedimentation forming the lower Vindhyan can be traced back to Paleoproterozoic and stopped somewhere around early Mesoproterozoic (~1,721 Ma to 1,600 Ma). Sedimentation forming the upper Vindhyan resumed again in the Mesoproterozoic and ceased in Neoproterozoic. Vindhyan Supergroup portrayed transitional to shallow marine depositional environment, such as alluvial fan , delta , tidal flat , carbonate ramp etc. To

Tectonic evolution of the Aravalli Mountains - Misplaced Pages Continue

3570-404: The arcuate shape of its convergent zone. The Aravalli Mountains basement started with an older sialic crust evolving into extensive granitic batholiths by the emplacement of granitic bodies during the period ca. 3.0 to 2.5 Ga. This subsequently led to rapid cratonization and rapid thickening of crust to about 20–25 km. The main crustal source is believed to be old crustal components of

3655-659: The area of the Aravalli Hill Range. Among them, there are similarities in material culture, and in the production of copper tools. They are located near the copper mines. "The GSCC is east of the Harappan culture, to the north-east of Ahar–Banas Complex , north/north west to the Kayatha Culture and at a later date, west of the OCP-Copper Hoard sites ( Ochre Coloured Pottery culture – Copper Hoard culture ). Located within

3740-401: The area. The lithologies of the rock suite are predominantly rhyolitic and rhyodacitic volcanic rocks with granitoid intrusions overlying unconformably or intruding through the Delhi Supergroup. Apart from the vigorous post-orogenic magmatic event, a large number of so-called ‘Purana’ basins was actively developing near the orogenic belts. The word ‘Purana’ means ‘ancient’ and was used to depict

3825-540: The area. The region subsequently experienced a large scale metamorphic event that granite is partly metamorphosed into gneissic rocks, forming the Archean Basement. These cratonization processes continued together signifying the end of amalgamation of cratonic nuclei that constitutes the development of an early continental crust. During the Paleoproterozoic Era, the opening of Aravalli oceanic basin separated

3910-554: The attenuated crust on the eastern flank of the separated continent, subsequent destruction of the continental margin by accretion of the Delhi island arc (a type of archipelago composed of an arc-shaped chain of volcanoes closely situated parallel to a convergent boundary between two converging tectonic plates) from the west around 1.5 Ga. This tectonic plates collision event involved early thrusting with partial obduction (overthrusting of oceanic lithosphere onto continental lithosphere at

3995-510: The crust after Delhi Orogeny. It spans an area of about 104,000 km in the northwestern part of India overlying on the Archean Bhilwara Gneissic Basement. The Vindhyan Supergroup is classified into two fundamental strata, lower and upper Vindhyan, with a large unconformity representing 500 million years interval between the strata. Within each stratum, it is further categorized into major groups. The lower Vinhydan comprises

4080-511: The development of an island arc between the two cratons. After collision had proceeded for a certain period of time, the uplift of the Aravalli Supergroup was induced at around 1800 Ma. In the last stage of convergence, the thrust fault further steepened and the colliding blocks eventually become sutured. The suture zone is marked by the Great Boundary Fault. During the Mesoproterozoic Era, another rifting phase began. At that time,

4165-469: The development of isolated basins. In subaerial rifts, for example, drainage at the onset of rifting is generally internal, with no element of through drainage. As the rift evolves, some of the individual fault segments grow, eventually becoming linked together to form the larger bounding faults. Subsequent extension becomes concentrated on these faults. The longer faults and wider fault spacing leads to more continuous areas of fault-related subsidence along

4250-486: The development of oceanic basin. The rifting process is believed to be associated with the formation of the Columbia supercontinent, which happened from 2.5 Ga to 1.8 Ga and was coeval with the onset of Aravalli orogeny's rifting basin. The opening of another sedimentary basin during the Delhi orogeny (~-1,100 Ma) coincided with the time where the supercontinent Columbia broke up, and the cessation of basin development followed by

4335-675: The domestication of cattle for agriculture; and post Stone Age starting from 10,000 BP saw the development of the Kalibangan civilisation, 4,000 BP the Aahar civilisation and 2,800 BP the Gneshwar civilisation. The Tosham hills have several Indus Valley Civilisation sites in and around the hill range as the area falls under copper-bearing zone of Southwest Haryana and Northeast Rajasthan of Aravalli hill range. Investigation of IVC network of mineral ore needs for metallurgical work and trade, shows that

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4420-616: The east, the Thar Desert in the west, Indo-gangetic alluvium in the north, and the Son River - Narmada River - Tapti River basins in the south. It mainly has quartzite , marble , pelite , greywacke and extinct volcanos exposed in the Aravalli-Delhi Orogen . Malani Igneous Suite is the largest in India and third largest igneous suit in the world. The uniqueness of the geological feature of Malani Igneous Suite at Jodhpur prompted

4505-493: The eastern Bundelkhand craton and the western Marwar craton. Sedimentation of the Aravalli Supergroup took place simultaneously with basic magmatism and followed by a gradual subsidence of the Aravalli Basin floor. Soon after the rifting phase ended, the compressional phase took place where the eastern Bundelkhand craton subducted under the western Marwar craton. As collision continued, the subduction zone steepened, leading to

4590-593: The existence and condition of mines in the Aravalli Range. In the Guru Gram district, the Aravalli hills occupy an area of 11,256 hectares, of which 491 (4.36%) hectares had mines, of which 16 hectares (0.14%) were abandoned flooded mines. In the Faridabad and Mewat districts, about 3610 hectares were part of mining industry, out of a total of 49,300 hectares. These mines were primarily granite and marble quarries for India's residential and real estate construction applications. In

4675-577: The extension of Aravalli ridge in Rajasthan, Haryana and NCT-Delhi; forest areas; rivers and tributaries... major lakes and water bodies such as Badkhal lake , Suraj Kund and Damdama in Haryana sub-region" . This area as part of Northern Aravalli leopard and wildlife corridor is an important habitat for the leopards in Haryana . This corridor runs from Sariska and Ranthmbor to Rann of Kutch National Park and Gir National Park in Gujarat. The following national parks, wildlife reserves, and forests lie in

4760-540: The forest land can be exploited and opened up for the intrusive human development. This habitat is under serious threat from the wrong actions of the Government of Haryana which in 2019 passed the amendment to the Punjab Land Alienation Act, 1900 (PLPA). Governor has given his assent for the act, but it has not yet been notified by the Haryana government, hence it is in limbo and has not officially become

4845-809: The grounds of the Government School in Khanak, during 2014 and 2016. They found early to mature Harappan phase IVC materials, pottery, semiprecious beads of lapis lazuli , carnelian and others. They also found evidence of metallurgical activities, such as crucibles (used for pouring molten metal), furnace lining, burnt floor, ash and ore slugs. Ceramic petrography , metallography , scanning electron microscope (SEM, non-destructive, surface images of nanoscale resolution), energy-dispersive X-ray spectroscopy (EDXA and EDXMA non-destructive, qualitative and quantitative elemental composition) and transmission electron microscopy (TEM, destructive method) scientific studies of

4930-570: The group of isolated sedimentary basins with thick Proterozoic sedimentary strata that are relatively undeformed on the Indian Shield. The Vindhyan Basin and the Marwar Basin are part of the Purana basins that sit near the Aravalli Mountain Range. The Vindhyan Basin is located on the southeastern side of the Aravalli Mountain Range where its formation is believed to be associated to the large downwarp of

5015-654: The highways and railways bisecting the Aravalli range and wildlife corridor in several places pose a great risk. Large parts of Aravalli are legally and physically unprotected, with no wildlife passages and little or no wildlife conservation work resulting in deaths of over 10 leopards in 4 years between January 2015 to January 2019. The Haryana side of the Gurugram-Faridabad Aravalli hill forests lack availability of water due to which wild animals are seldom seen there. The Government of Haryana used drones for aerial surveys and dug 22 ephemeral pits in 2018 to store

5100-522: The length of the Aravalli Range providing an economic boost. The Aravalli Range is the home of forests, wildlife, protected areas, UNESCO heritage listed forts, rivers, and historical monuments which sustain a large tourism industry. Damage to the environment and ecology from the unorganized urbanization , overexploitation of the natural resources including water and minerals, mining , untreated human waste and disposal, pollution, loss of forest cover and wildlife habitat , unprotected status of most of

5185-425: The main rift bounding fault changes from segment to segment. Segment boundaries often have a more complex structure and generally cross the rift axis at a high angle. These segment boundary zones accommodate the differences in fault displacement between the segments and are therefore known as accommodation zones. Accommodation zones take various forms, from a simple relay ramp at the overlap between two major faults of

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5270-567: The majority of passive continental margins. Magma-starved rifted margins are affected by large-scale faulting and crustal hyperextension. As a consequence, upper mantle peridotites and gabbros are commonly exposed and serpentinized along extensional detachments at the seafloor. Many rifts are the sites of at least minor magmatic activity , particularly in the early stages of rifting. Alkali basalts and bimodal volcanism are common products of rift-related magmatism. Recent studies indicate that post-collisional granites in collisional orogens are

5355-475: The material found prove that the Khanak site was inhabited by the IVC metal-workers who used the locally mined polymetallic tin , and they were also familiar with metallurgical work with copper and bronze . The lowest level of site dates back as far the pre-Harappan era to Sothi-Siswal culture (6600 BP) tentatively. The Ganeshwar Sunari Cultural Complex (GSCC) is a collection of third millennium BCE settlements in

5440-399: The middle Bilara Group, and the upper Nagaur Group. Arenaceous rocks , calcareous rocks and evaporites are the dominant rock type in the Marwar Basin. The tectonic events and basin developmental phases are thought to be correlated to the amalgamation and breakup of plates during supercontinent cycles of Columbia , Rodinia , and Gondwana . The Aravalli orogeny (~1,800 Ma) began with

5525-512: The most common type of grinding stone at Harappa is of Delhi quartzite type found only in the westernmost outliers of the Aravalli range in southern Haryana near Kaliana and Makanwas villages of Bhiwani district. The quartzite is red-pink to pinkish grey in colour and is crisscrossed with thin haematite and quartz filled fractures with sugary size grain texture. Ravindra Nath Singh and his team of Banaras Hindu University carried out ASI -financed excavations of Indus Valley Civilisation site on

5610-404: The product of rifting magmatism at converged plate margins. The sedimentary rocks associated with continental rifts host important deposits of both minerals and hydrocarbons . SedEx mineral deposits are found mainly in continental rift settings. They form within post-rift sequences when hydrothermal fluids associated with magmatic activity are expelled at the seabed. Continental rifts are

5695-430: The rainwater which became dry during the summer months. In January 2019, the government announced the plan to make the pit perennial by connecting those with pipelines from the nearby villages. Human activity, such as unplanned urbanization and polluting industrial plants, also pose a great threat. There is often reluctance and denial on part of the government officials of the presence of wildlife such as leopard so that

5780-1192: The regions of the Aravalli Hill Range, primarily along the Kantli, Sabi, Sota, Dohan and Bondi rivers, the GJCC is the largest copper producing community in third millennium BCE South Asia, with 385 sites documented. Archaeological indicators of the GSCC were documented primarily in Jaipur, Jhunjhunu, and Sikar districts of Rajasthan, India ..." Pottery found in the area include incised ware, and reserved slipware. There are two main type sites , Ganeshwar , and Sunari , in Tehsil Kot Putli, Jaipur district (Geo coordinates: N 27° 35' 51", 76° 06' 85" E). The Northern Aravalli range in Delhi and Haryana has humid subtropical climate and hot semi-arid continental climate with very hot summers and relatively cool winters. The main characteristics of climate in Hisar are dryness, extremes of temperature, and scanty rainfall. The maximum daytime temperature during

5865-432: The rift axis. Significant uplift of the rift shoulders develops at this stage, strongly influencing drainage and sedimentation in the rift basins. During the climax of lithospheric rifting, as the crust is thinned, the Earth's surface subsides and the Moho becomes correspondingly raised. At the same time, the mantle lithosphere becomes thinned, causing a rise of the top of the asthenosphere. This brings high heat flow from

5950-440: The rocks generally range from greenschist facies to amphibolite facies. The upper Delhi Supergroup overlies on the Aravalli Supergroup with a clear unconformity. This supergroup hosts two main types of rocks: a thick sequence of volcanic rocks that is of continental affinity; and sedimentary rocks that represent fluvial and shallow marine environments and deep marine depositional environment. The depositional age of these sequences

6035-474: The same polarity, to zones of high structural complexity, particularly where the segments have opposite polarity. Accommodation zones may be located where older crustal structures intersect the rift axis. In the Gulf of Suez rift, the Zaafarana accommodation zone is located where a shear zone in the Arabian-Nubian Shield meets the rift. Rift flanks or shoulders are elevated areas around rifts. Rift shoulders are typically about 70 km wide. Contrary to what

6120-474: The sedimentary rocks around 1.8 Ga years ago during Paleoproterozoic phase. The tectonic setting of zinc-lead-copper sulfides mineralisation in the Delhi supergroup rocks in Haryana-Delhi were formed by mantle plume volcanic action around one billion years ago covering Haryana and Rajasthan during the mesoproterozoic . In the southern part of the Aravalli supergroup arc base metal sulfides were generated near

6205-510: The sites of significant oil and gas accumulations, such as the Viking Graben and the Gulf of Suez Rift . Thirty percent of giant oil and gas fields are found within such a setting. In 1999 it was estimated that there were 200 billion barrels of recoverable oil reserves hosted in rifts. Source rocks are often developed within the sediments filling the active rift ( syn-rift ), forming either in

6290-464: The southern part, similar rock types, despite different names, are identified, where they are Gogunda Group (equivalent to Alwar group) and the Kumbhalgarh Group (equivalent to Ajabgarh Group). The tectonic evolution of the Aravalli-Delhi orogenic belt can be divided into four phases: Two phases of rifting , sedimentation , collision and suturing were documented in the tectonic evolution of

6375-598: The subduction zone on the western fringe and in zones of back-arc extension to the south-east. Continued subduction produced tungsten - tin mineralisation in S-type (sedimentary unmetamorphosed rock), felsic (volcanic rock), and plutons (crystallised solidified magma). This includes commercially viable quantities of minerals, such as rock phosphate , lead - zinc - silver mineral deposits at Zawar , Rikahbdev serpentinite , talc , pyrophyllite , asbestos , apatite , kyanite and beryl . Mining of copper and other metals in

6460-545: The summer varies between 40 and 46 °C (104 and 115 °F). During winter, its ranges between 1.5 and 4 °C. The Central Aravalli range in Rajasthan has an arid and dry climate. The Southern Aravalli range in Gujarat has a tropical wet and dry climate Three major rivers and their tributaries flow from the Aravalli, namely Banas and Sahibi rivers which are tributaries of Yamuna , as well as Luni River which flows into

6545-452: The survey area), nilgai (55 sightings), palm civet (7 sightings), wild pig (14 sightings), rhesus macaque (55 sightings), peafowl (57 sightings) and Indian crested porcupine (12 sightings). Encouraged by the first survey, the wildlife department has prepared a plan for a comprehensive study and census of wildlife across the whole Aravalli Range, including radio collar tracking of the wild animals. Well known leopard and hyena habitat

6630-478: The tectonic history. The Aravalli Mountain Range features a horst -like structure and consists of a series of Proterozoic rocks that are intensely deformed and metamorphosed . Three main subdivisions of rocks constitute the stratigraphy of the mountain range, with the Archean Bhilwara Gneissic Complex basement being the lowest strata, followed by the overlying lower Aravalli Supergroup and

6715-437: The transition from rifting to spreading develops at a triple junction where three converging rifts meet over a hotspot . Two of these evolve to the point of seafloor spreading, while the third ultimately fails, becoming an aulacogen . Most rifts consist of a series of separate segments that together form the linear zone characteristic of rifts. The individual rift segments have a dominantly half-graben geometry, controlled by

6800-485: The upper Delhi Supergroup. The northern part of the mountain range only consists of the Delhi Supergroup, and this has given to its name of ‘North Delhi Belt. On the southern side, however, both the Aravalli and Delhi supergroups are present. The mountain range is bounded by the Eastern and Western marginal faults , where the former is also termed as the Great Boundary Fault. Quartzites The Bhilwara Gneissic Complex basement

6885-491: The upwelling asthenosphere into the thinning lithosphere, heating the orogenic lithosphere for dehydration melting, typically causing extreme metamorphism at high thermal gradients of greater than 30 °C. The metamorphic products are high to ultrahigh temperature granulites and their associated migmatite and granites in collisional orogens, with possible emplacement of metamorphic core complexes in continental rift zones but oceanic core complexes in spreading ridges. This leads to

6970-671: The west of the Aravalli Mountain Range and far beyond the Vindhyan Basin lies the Neoproterozoic-to- Cambrian -aged Marwar Basin. The Marwar Basin sits on the Malani Igneous Suite and contains a sedimentary section of 2 km in thickness. Similar to other Purana basins, the Marwar Supergroup is less deformed and unmetamorphosed. The Marwar Supergroup is classified into three major groups: the lower Jodhpur Group,

7055-550: The western block might have created another island arc, and similar to the Aravalli orogeny, further collision between the two blocks with island arc in between gave rise to the development of the Delhi orogeny around 1100 Ma. The suture zone between the two cratons is marked by the Western Marginal Fault and the emplacement of the Phulad Ophiolite Suite in the region. The epilogue of the tectonic evolution

7140-522: Was marked by granitic and rhyolitic magmatic events, namely the emplacement of the Erinpura granite and the Malani Volcanics on the western side of Aravalli-Delhi orogenic belt. This event is ranked third among the largest igneous province in the globe, with a total area of about 52,000 km in India. Malani Igneous Suite is a collective term for bimodal volcanic and plutonic rocks aged 873–800 Ma in

7225-530: Was previously thought, elevated passive continental margins (EPCM) such as the Brazilian Highlands , the Scandinavian Mountains and India's Western Ghats , are not rift shoulders. The formation of rift basins and strain localization reflects rift maturity. At the onset of rifting, the upper part of the lithosphere starts to extend on a series of initially unconnected normal faults , leading to

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