Academic literature on the topic 'Eastern Dharwar Craton (EDC)'

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Journal articles on the topic "Eastern Dharwar Craton (EDC)"

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Mohan, M. Ram, Ajay Dev Asokan, and Simon A. Wilde. "Crustal growth of the Eastern Dharwar Craton: a Neoarchean collisional orogeny?" Geological Society, London, Special Publications 489, no. 1 (December 11, 2019): 51–77. http://dx.doi.org/10.1144/sp489-2019-108.

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AbstractThe Eastern Dharwar Craton (EDC) is predominantly made of Neoarchean potassic granitoids with subordinate linear greenstone belts. Available geochemical and isotopic systematics of these granitoids suggest variations in the source and petrogenetic mechanisms. By compiling the available geochemical data, these granitoids can be classified into four groups, namely: TTGs (tonalite–trondhjemite–granodiorite); sanukitoids; biotite and two-mica granites; and hybrid granites. This classification scheme is in line with the global classification of Neoarchean granites, and enables the sources and petrogenetic mechanisms of these variants to be distinguished. Available geochemical, isotopic and geochronological datasets of these granitoids are integrated and the existing tectonic models for the Neoarchean EDC are reviewed. The variability of the EDC granitoids is ascribed to crustal reworking associated with the collision of two continental blocks. The tectonomagmatic evolution of the EDC is analogous to the development of the Himalayan Orogeny. Based on the evolutionary history of the Dharwar Craton, it can be concluded that convergent margin tectonics were operational in the Indian Shield from at least c. 3.3 Ga and continued into the Phanerozoic. However, the nature and style of plate tectonics could be different with time.
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Sunder Raju, P. V., P. G. Eriksson, O. Catuneanu, S. Sarkar, and S. Banerjee. "A review of the inferred geodynamic evolution of the Dharwar craton over the ca. 3.5–2.5 Ga period, and possible implications for global tectonics." Canadian Journal of Earth Sciences 51, no. 3 (March 2014): 312–25. http://dx.doi.org/10.1139/cjes-2013-0145.

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The geological history and evolution of the Dharwar craton from ca. 3.5–2.5 Ga is reviewed and briefly compared with a second craton, Kaapvaal, to allow some speculation on the nature of global tectonic regimes in this period. The Dharwar craton is divided into western (WDC) and eastern (EDC) parts (separated possibly by the Closepet Granite Batholith), based on lithological differences and inferred metamorphic and magmatic genetic events. A tentative evolution of the WDC encompasses an early, ca. 3.5 Ga protocrust possibly forming the basement to the ca. 3.35–3.2 Ga Sargur Group greenstone belts. The latter are interpreted as having formed through accretion of plume-related ocean plateaux. The approximately coeval Peninsular Gneiss Complex (PGC) was possibly sourced from beneath plateau remnants, and resulted in high-grade metamorphism of Sargur Group belts at ca. 3.13–2.96 Ga. At about 2.9–2.6 Ga, the Dharwar Supergroup formed, comprising lower Bababudan (largely braided fluvial and subaerial volcanic deposits) and upper Chitradurga (marine mixed clastic and chemical sedimentary rocks and subaqueous volcanics) groups. This supergroup is preserved in younger greenstone belts with two distinct magmatic events, at 2.7–2.6 and 2.58–2.54 Ga, the latter approximately coincident with ca. 2.6–2.5 Ga granitic magmatism which essentially completed cratonization in the WDC. The EDC comprises 2.7–2.55 Ga tonalite–trondhjemite–granodiorite (TTG) gneisses and migmatites, approximately coeval greenstone belts (dominated by volcanic lithologies), with minor inferred remnants of ca. 3.38–3.0 Ga crust, and voluminous 2.56–2.5 Ga granitoid intrusions (including the Closepet Batholith). An east-to-west accretion of EDC island arcs (or of an assembled arc – granitic terrane) onto the WDC is debated, with a postulate that the Closepet Granite accreted earlier onto the WDC as part of a “central Dharwar” terrane. A final voluminous granitic cratonization event is envisaged to have affected the entire, assembled Dharwar craton at ca. 2.5 Ga. When Dharwar evolution is compared with that of Kaapvaal, while possibly global magmatic events and freeboard–eustatic changes at ca. 2.7–2.5 Ga may be identified on both, the much earlier cratonization (by ca. 3.1 Ga) of Kaapvaal contrasts strongly with the ca. 2.5 Ga stabilization of Dharwar. From comparing only two cratons, it appears that genetic and chronologic relationships between mantle thermal and plate tectonic processes were complex on the Archaean Earth. The sizes of the Kaapvaal and Dharwar cratons might have been too limited yet to support effective thermal blanketing and thus accommodate Wilson Cycle onset. However, tectonically driven accretion and amalgamation appear to have predominated on both evolving cratons.
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PRAKASH, D., and I. N. SHARMA. "Metamorphic evolution of the Karimnagar granulite terrane, Eastern Dharwar Craton, south India." Geological Magazine 148, no. 1 (June 14, 2010): 112–32. http://dx.doi.org/10.1017/s0016756810000488.

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AbstractThe Karimnagar granulite terrane is an integral part of the Eastern Dharwar Craton (EDC), India, having been the subject of much interest because of the only reported granulite facies rocks in the EDC. It shows a large variety of rock types with a wide range of mineral parageneses and chemical compositions, namely charnockites (Opx+Pl+perthite+Qtz±Bt±Grt), gneisses (Opx+Crd+Bt+Pl+Qtz+perthite±Sil±Grt±Spl; Bt+Qtz+Pl±Crd±Hbl±Spl), mafic granulites (Cpx+Pl+Qtz±Opx±Hbl), quartz-free granulites (Spr+Spl+Bt+Crd+Kfs+Crn; Bt+Crd+Kfs±Crn±Spl±Krn; And+Bt+Kfs+Chl), granites (Qtz+Pl+Kfs±Bt±Hbl), altered ultramafic rocks (Chl+Trem+Tlc), metadolerites (Cpx+Pl±Bt±Qtz±Chl), banded magnetite quartzites and quartzites. Andalusite- and chlorite-bearing assemblages presumably suggest a retrograde origin. Investigation of quartz-free granulites of the area brings out some interesting and important observations, reflecting the presence of refractory phases. These granulites are devoid of sillimanite and contain corundum instead. Reaction textures in the gneisses include breakdown of garnet to form coronas and symplectites of orthopyroxene+cordierite, formation of cordierite from garnet+sillimanite+quartz and late retrograde biotite and biotite+quartz symplectites. In the mafic granulites, inclusions of quartz and hornblende within orthopyroxene are interpreted as being a part of the prograde assemblage. At a later stage orthopyroxene is also rimmed by hornblende. The quartz-free granulites display a variety of spectacular coronas, for example, successive rims on corundum consisting of spinel+sapphirine+cordierite±orthopyroxene, rare skeletal symplectitic intergrowth of sapphirine+cordierite+potash feldspar, and late retrograde formation of chlorite, corundum, spinel and andalusite from sapphirine±cordierite. Based on chemographic relationships and petrogenetic grids, a sequence of prograde, isothermal decompressive and retrograde reactions have been inferred. Quartz-free sapphirine granulites and mafic granulites record the highest P–T conditions (~7 kbar, 850°C), whereas the gneisses were formed at lower P–T conditions (~5 kbar, 800°C). In addition, the presence of andalusite-bearing rocks suggests a pressure of around 2.5 kbar. This change in pressure from 7 kbar to around 2.5 kbar suggests a decompressive path for the evolution of granulites in the study area, which indicates an uplift for the granulite-facies rocks from lower crustal conditions. The implications for supercontinent history are also addressed in light of available geochronological data.
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Rai, Apratim K., Rajesh K. Srivastava, Amiya K. Samal, and V. V. Sesha Sai. "Geochemical characterization and geodynamic implication of N-trending mafic dyke swarm from the western Dharwar craton and their possible link to the ca. 2.22 Ga large igneous province." Neues Jahrbuch für Mineralogie - Abhandlungen Journal of Mineralogy and Geochemistry 196, no. 3 (July 1, 2020): 243–60. http://dx.doi.org/10.1127/njma/2020/0215.

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Several N-trending mafic dykes are exposed in the western Dharwar craton (WDC) and they are thought to be coeval with the ca. 2.22 Ga N- to NNW-trending Kandlamadugu dyke swarm of the eastern Dharwar craton (EDC). Geo- chemical characterization of these dykes is presented here to understand their genetic aspects and likely correlation with their counterpart in the EDC. Petrographic examinations suggest mineralogical and textural variations from dolerite to metadolerite types. Geochemically they are classified either as sub-alkaline tholeiitic basalt or basaltic andesite. Geochemical variations suggest evolution of mantle melt and demonstrate prominent clinopyroxene fractionation, however, minor role of olivine, orthopyroxene and plagioclase fractionation cannot be discarded at initial stages of crystallization. Fractionation trends of trace elements suggest crystallization of accessory phases like ilmenite, apatite and zircon, at later stages. Although observed geochemical nature suggests a little effect of involvement of crust, however, its role in the genesis of the studied mafic dykes cannot be ignored. Conversely, it is suggested that they are derived from a melt generated in a sub-continental lithospheric mantle (SCLM), which was metasomatized during an ancient subduction event before its cratonization. Based on the petrogenetic models of incompatible trace elements, it is inferred that they were likely to be derived from a melt generated by a lower percentage of melting within the garnet or garnet-spinel transition zone. Their connection to the ca. 2.22 Ga large igneous province (LIP) indicates as an integral part of the ca. 2.22 Ga N- to NNW-trending Kandlamadugu dyke swarm of the EDC. The existence of a mantle plume, substantiated by mantle potential temperature (Tp) estimate, is well-supported by higher thermal regime in the upper mantle. Although there is no direct age data available for the studied mafic dykes, however, their geochemical similarities with the ca. 2.22 Ga Kandlamadugu swarm suggest that they are co-genetic and could be linked to the same event. The likely age correlation of the ca. 2.22 Ga Kandlamadugu swarm with mafic dykes of North Atlantic and Superior cratons, support their link with the Superia supercraton.
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Kumar, K. Satish, R. K. Kishore, Parveen Begum, D. Seshu, and Rama Rao Ch. "Estimation of depth extent of Gangam-Peruru complex of Eastern Dharwar Craton (EDC) from aeromagnetic data." Arabian Journal of Geosciences 8, no. 5 (April 13, 2014): 2681–86. http://dx.doi.org/10.1007/s12517-014-1383-1.

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Ashok, Ch, E. V. S. S. K. Babu, Sarbajit Dash, and G. H. N. V. Santhosh. "Redox Condition and Mineralogical Evidence of the Magma Mixing Origin of the Mafic Microgranular Enclaves (MMEs) from Sircilla Granite Pluton (SGP), Eastern Dharwar Craton (EDC), India." Journal of the Geological Society of India 98, no. 9 (September 10, 2022): 1237–43. http://dx.doi.org/10.1007/s12594-022-2158-z.

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Naqvi, S. M., R. M. K. Khan, C. Manikyamba, M. Ram Mohan, and Tarun C. Khanna. "Geochemistry of the NeoArchaean high-Mg basalts, boninites and adakites from the Kushtagi–Hungund greenstone belt of the Eastern Dharwar Craton (EDC); implications for the tectonic setting." Journal of Asian Earth Sciences 27, no. 1 (June 2006): 25–44. http://dx.doi.org/10.1016/j.jseaes.2005.01.006.

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Roy, Sunil Kumar, D. Srinagesh, Dipankar Saikia, Arun Singh, and M. Ravi Kumar. "Seismic anisotropy beneath the Eastern Dharwar craton." Lithosphere 4, no. 4 (August 2012): 259–68. http://dx.doi.org/10.1130/l198.1.

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OKUDAIRA, T., T. HAMAMOTO, B. HARI PRASAD, and RAJNEESH KUMAR. "Sm–Nd and Rb–Sr dating of amphibolite from the Nellore–Khammam schist belt, SE India: constraints on the collision of the Eastern Ghats terrane and Dharwar–Bastar craton." Geological Magazine 138, no. 4 (July 2001): 495–98. http://dx.doi.org/10.1017/s001675680100543x.

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The Nellore–Khammam schist belt, SE India, is sandwiched in between the Proterozoic Eastern Ghats terrane and the Archaean Dharwar–Bastar craton. We report Sm–Nd and Rb–Sr mineral isochron ages of amphibolite from the schist belt. The Sm–Nd and Rb–Sr ages are 824±43 Ma and 481±16 Ma, respectively. The Sm–Nd age indicates the timing of peak metamorphism, whereas the Rb–Sr age indicates the Pan-African thermal overprint. The peak metamorphism was related to collision of the Eastern Ghats terrane with the Dharwar-Bastar craton, which occurred during early Neoproterozoic time.
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Naganjaneyulu, K., and T. Harinarayana. "Deep Crustal Electrical Signatures of Eastern Dharwar Craton, India." Gondwana Research 7, no. 4 (October 2004): 951–60. http://dx.doi.org/10.1016/s1342-937x(05)71077-7.

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Dissertations / Theses on the topic "Eastern Dharwar Craton (EDC)"

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Gore, R. J. "Geochronological and sedimentological constraints of the Srisailam Formation, S.E. India." Thesis, 2011. http://hdl.handle.net/2440/96125.

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The Proterozoic Cuddapah Basin contains the poorly constrained Srisailam Formation, which presumably lies unconformably over the Nallamalai Group. The Cuddapah Basin is thought to have initiated as a rift basin > 1900 Ma before developing into a foreland basin due to uplift of the Eastern Ghats Belt (EGB) at ~1600 Ma. U-Pb geochronology indicates deposition of the Srisailam Formation commenced after 1660 Ma and ceased prior to the deposition of the Kurnool Group which was deposited < 1090 Ma. The Srisailam Formation was deposited in a tidal flat/shallow marine environment as it contains tidal and storms influences, glauconitic sandstones, along with bimodal east-west paleocurrents, which suggest links with an open seaway. Detrital zircon Hf isotope data combined with detrital zircon U-Pb data suggest the Dharwar Craton as a dominant source region with a mixed crustal evolution (ɛHf -11 to +8). Detrital zircon age peaks at ~3200 Ma, ~2700-2400 Ma and ~2300 Ma imply that sediments are dominantly sourced from 3400-3000 Ma tonalite-trondhjemite-granodiorite (TTG), 3000-2500 Ma volcanosedimentary greenstone belts and 2600-2500 Ma calc-alkaline to K-rich granitic intrusions. Trace element data suggests zircon grains are sourced from granitoids with zircon crystallisation at ~860˚C. This study reveals that the Srisailam Formation is quite possibly a lateral equivalent of the Nallamalai Group.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Earth and Environmental Sciences, 2011
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Marokane, Manoko Maggie. "Petrology and (U-Th)/He Thermochronology of Mesoproterozoic Kimberlites from the eastern Dharwar Craton, southern India." Thesis, 2017. https://hdl.handle.net/10539/25041.

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A dissertation submitted in fulfilment of the requirements for the degree of Master of Science, in the Department of Geosciences, University of the Witwatersrand, Johannesburg, South Africa, 2017.
Apatite (U-Th)/He thermochronometry data from two different kimberlite clusters of the Dharwar Craton is used, together with geologic constraints, to develop a model for the burial, uplift, and unroofing history of southern India (i.e. Peninsular India). The apatite helium (AHe) dates for the CC-5 kimberlite at a present-day elevation of 398 m range between 128-235 Ma, with a mean age of 164.9 ± 21.2 Ma (1 S.D.). The AHe dates for the SK-2 kimberlites at a present-day elevation of 289 m range from 121.1-170.7 Ma, with a mean age of 166.3 ± 25.2 Ma (1 sigma standard deviation). The mean AHe ages for the CC-5 and SK-2 kimberlites from the approximately 150 km apart Wajrakarur and Raichur kimberlite fields, respectively, are indistinguishable within their uncertainties. This suggests a similar uplift and erosion history of the two areas on the eastern Dharwar craton. All these dates are younger than kimberlite pipe emplacement (ca. 1100 Ma) signalling a major post-emplacement erosion during the Mesozoic (Middle Jurassic). We use the data to link not only uplift and erosion to elevation gain, but to show how this corresponds to deep mantle processes and continental formation or breakup. Our HeFTy time-temperature modelling results indicate heating to temperatures of ~175 °C suggesting burial, which was followed by an unroofing (cooling) event. Plate tectonic modelling using GPlates software package is also consistent with t-T models, in that the signals observed are also recorded by plate movements (e.g. the 175 Ma). Burial is restricted to a depth of 3 km after pipe emplacement. Erosion estimates show that the Dharwar Craton underwent ≥ 1.5-4 km of erosion during the Jurassic, most likely related to Gondwana break-up that commenced at ~180 Ma. The fast drift of the Indian plate (18 cm/a) towards the northern hemisphere during the Cretaceous is related to the removal of the once thick cratonic keel beneath the Indian Craton. Whether parts of the mantle lithosphere were delaminated/removed during or post Gondwana is controversially debated. Herein, we propose a model for cratonic root delamination, related to deep mantle processes (i.e., dynamic topography) that may have played a role or aided in lithospheric thinning of the Indian tectonic plate.
LG2018
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Books on the topic "Eastern Dharwar Craton (EDC)"

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Rao, A. T. A crustal section of eastern Dharwar craton-Godavari rift-Eastern Ghats mobile belt, India: Field excursion guide book. Bangalore: Geological Society of India, 1997.

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Book chapters on the topic "Eastern Dharwar Craton (EDC)"

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Das, J. N., M. M. Korakoppa, Fareeduddin, S. Shivanna, J. K. Srivastava, and N. L. Gera. "Tuffisitic Kimberlite from Eastern Dharwar Craton, Undraldoddi Area, Raichur District, Karnataka, India." In Proceedings of 10th International Kimberlite Conference, 109–28. New Delhi: Springer India, 2013. http://dx.doi.org/10.1007/978-81-322-1173-0_8.

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Pahari, Arijit, and C. Manikyamba. "Arc–Back Arc Cohabitation and Associated Bimodal Volcanism: Evidence from Neoarchean Raichur Greenstone Belt, Eastern Dharwar Craton, India." In Geochemical Treasures and Petrogenetic Processes, 3–29. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-4782-7_1.

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Ravi, S., M. V. Sufija, S. C. Patel, J. M. Sheikh, M. Sridhar, F. V. Kaminsky, G. K. Khachatryan, S. S. Nayak, and K. S. Bhaskara Rao. "Diamond Potential of the Eastern Dharwar Craton, Southern India, and a Reconnaissance Study of Physical and Infrared Characteristics of the Diamonds." In Proceedings of 10th International Kimberlite Conference, 335–48. New Delhi: Springer India, 2013. http://dx.doi.org/10.1007/978-81-322-1170-9_23.

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Sesha Sai, V. V., S. N. Mahapatro, Santanu Bhattacharjee, Tarun C. Khanna, and M. M. Korakoppa. "Petrology and Mineral Chemistry of a Porphyritic Mafic Dyke, Jonnagiri Schist Belt, Eastern Dharwar Craton, India: Implications for Its Magmatic Origin." In Springer Geology, 391–414. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-1666-1_10.

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Absar, Nurul, Mohd Qaim Raza, Sminto Augustine, Shreyas Managave, D. Srinivasa Sarma, and S. Balakrishnan. "Trace, Rare-Earth Elements and C, O Isotope Systematics of Carbonate Rocks of Proterozoic Bhima Group, Eastern Dharwar Craton, India: Implications for the Source of Dissolved Components, Redox Condition and Biogeochemical Cycling of Mesoproterozoic Ocean." In Society of Earth Scientists Series, 297–326. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-89698-4_13.

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R. Mir, Akhtar. "Proterozoic Newer Dolerite Dyke Swarm Magmatism in the Singhbhum Craton, Eastern India." In Geochemistry and Mineral Resources [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.104833.

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Precambrian mafic magmatism and its role in the evolution of Earth’s crust has been paid serious attention by researchers for the last four decades. The emplacement of mafic dyke swarms acts as an important time marker in geological terrains. Number of shield terrains throughout the world has been intruded by the Precambrian dyke swarms, hence the presence of these dykes are useful to understand the Proterozoic tectonics, magmatism, crustal growth and continental reconstruction. Likewise, the Protocontinents of Indian Shield e.g. Aravalli-Bundelkhand, Dharwar, Bastar, and Singhbhum Protocontinent had experienced the dyke swarm intrusions having different characteristics and orientations. In Singhbhum craton, an impressive set of mafic dyke swarm, called as Newer dolerite dyke swarm, had intruded the Precambrian Singhbhum granitoid complex through a wide geological period from 2800 to 1100 Ma. Present chapter focuses on the published results or conclusions of these dykes in terms of their mantle source characteristics, metasomatism of the mantle source, degree of crustal contamination and partial melting processes. Geochemical characteristics of these dykes particularly Ti/Y, Zr/Y, Th/Nb, Ba/Nb, La/Nb, (La/Sm)PM are similar to either MORB or subduction zone basalts that occur along the plate margin. The enriched LREE-LILE and depletion of HFSE especially Nb, P and Ti probably indicate generation of these dykes in a subduction zone setting.
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Conference papers on the topic "Eastern Dharwar Craton (EDC)"

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Miller, Scott R., Joseph G. Meert, Anthony F. Pivarunas, Anup K. Sinha, and M. K. Pandit. "PALEOMAGNETISM AND GEOCHRONOLOGY IN THE EASTERN DHARWAR CRATON." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-303387.

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Pal, S. K., and S. Kumar. "Kimberlite mapping using Electrical Resistivity Tomography in Wajrakarur kimberlite field, Eastern Dharwar craton." In 1st Indian Near Surface Geophysics Conference & Exhibition. European Association of Geoscientists & Engineers, 2019. http://dx.doi.org/10.3997/2214-4609.201979029.

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Kumar, S., and S. K. Pal. "Interpretation of VLF-EM data over Wajrakarur kimberlite pipe 2, Eastern Dharwar craton, India." In 1st Indian Near Surface Geophysics Conference & Exhibition. European Association of Geoscientists & Engineers, 2019. http://dx.doi.org/10.3997/2214-4609.201979053.

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Pattnaik, Jiten, Sujoy Ghosh, and E. V. S. S. K. Babu. "Subduction and cumulate processes for the origin of eclogite xenoliths from Wajrakarur kimberlite field, Eastern Dharwar craton." In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.3319.

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Khadke, Namrata, Vijaya Kumar Teeda, Bhaskar Rao Yerraguntla, and E. V. S. S. K. Babu. "New information on the geochemistry of Neoarchean Sanukitoids from Eastern Dharwar Craton, Southern India; implications to regional tectonics." In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.7341.

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Chatterjee, Amitava, Suresh Chandra Patel, and Chang Whan Oh. "The Amalgamation of the Eastern Ghats Belt with the Dharwar Craton, India: Constraints from SHRIMP Zircon and EPMA Monazite Dating." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.367.

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Pvs, Raju. "The Occurrence of Platinum (Pt) and Skaergaardite (Pd, Cu) in the Hutti Underground Gold Mines, Eastern Dharwar Craton, Karnataka, India." In Goldschmidt2022. France: European Association of Geochemistry, 2022. http://dx.doi.org/10.46427/gold2022.10071.

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Harlov, Daniel, Daniel Dunkley, Edward Hansen, Ishwar-Kumar C, Vinod Samuel, and Tomokazu Hokada. "Zircon as a recorder of chemical change during metamorphism of Neoarchean lower crust, Shevaroy Block, Eastern Dharwar Craton, southern India." In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.5160.

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Augustine, Sminto, Nurul Absar, Shreyas Managave, Rajneesh Bhutani, and S. Balakrishnan. "Redox Conditions and Carbon Cycling of Mesoproterozoic Ocean: Clues from Trace Element and C-O-Sr Isotope Geochemistry of Carbonate Rocks of the Bhima Group, Eastern Dharwar Craton, India." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.93.

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