Pdf granitic rocks underlying deccan trap along the. Aug 27, 2009 synplutonic mafic dykes from late archaean granitoids in the eastern dharwar craton, southern india by m. Scribd is the worlds largest social reading and publishing site. Pdf greenstone belts of the eastern dharwar craton, india are reinterpreted as composite tectonostratigraphic terranes of accreted.
The dharwar craton, southern india, and its late archaean. Numerous lamproite dykes are hosted by the eastern dharwar craton, southern india, particularly towards the northwestern margin of the cuddapah basin. Precambrian mafic dyke swarms in the singhbhum craton eastern india and their links with dyke swarms of the eastern dharwar craton southern india reply rajesh k. Geochronology of neoarchaean granitoids of the nw eastern. Another transgression on the east coast of the peninsula is found between guntur.
Greenstone metamorphism, hydrothermal alteration, and gold. This craton is chiefly comprised of vast ttg gneisses, two generations of greenstone belts and late calcalkaline to potassic granites. Proterozoic evolution of eastern dharwar and bastar cratons, india an overview of the intracratonic basins, craton margins and mobile belts, doi 10. Synplutonic mafic dykes from late archaean granitoids in. Petrology and geochemistry of late archaean granitoids in. Smnd and rbsr dating of amphibolite from the nellore. Alternatively you can download a pdf containing the link which can be freely. Seismic anisotropy beneath the eastern dharwar craton research. Metamorphic evolution of the karimnagar granulite terrane, eastern. Petrological characteristics of the peddavura schist belt and. Google earth image and crosscutting field relationships of distinct paleoproterozoic mafic dykes from south of devarakonda area in the eastern dharwar craton has been studied to establish relative emplacement ages.
We report an interesting occurrence of a limestone xenolith in the siddanpalli kimberlite that intrudes the gadwal granite. The dharwar craton of southern india is one such archaean block, comprising 2. The eastern dharwar craton edc exposes widespread neoarchaean granite. It is divided into eastern dharwar craton and western dharwar craton owing to their differences in lithologies. Jul 12, 20 the remarkable similarity recorded between undraldoddi kimberlite and the diamondiferous tuffisitic kimberlites of wesselton mine, south africa is expected to renew the interest in kimberlite search as well as diamond exploration in this part of the eastern dharwar craton. New palaeomagnetic and rock magnetic results on mesoproterozoic kimberlites from the eastern dharwar craton, southern india. Located to the south of the central indian tectonic zone citz the bastar craton is limited by three prominent rifts, namely the godavari rift in the sw, the. The grey gneiss complex covering the entire craton formerly known as peninsular gneiss. In the northwestern part of the eastern dharwar craton edc granitoid magmatism started at 2. The craton is bounded in the east by the proterozoic eastern ghats mobile belt, in the northeast by the archaean. Journal of the geological society of india volume 74, pages 279 280 2009cite this article. Dharwar schist belts large, with volcanics, subordinate sediments. Proterozoic magmatism in the nallamalai fold belt and.
The sedimentary sequences and associated magmatic rocks from the cuddapah basin and adjoining fold belts on the eastern margin of the dharwar craton of peninsular india are repositories of several economic mineral deposits, including radioactive mineral deposits. Conclusion dharwar craton is a classical greenstonegranite terrain, divided into western and eastern dharwar craton. Pdf seismic anisotropy beneath the eastern dharwar craton. New zircon upb and luhf results on charnockites, granitoids and migmatites from the eastern salem block indicate that it mainly consists of bimodal juvenile neoarchaean early palaeoproterozoic. Field geological and petrographic study of granitic rocks. The kyanite eclogite from the p3 pipe is more mgrich than those from kl2. As part of the indian shield, it has been a relatively stable geologic terrain for several billion years. The western boundary of the eastern dharwar craton edc is poorly defined and closely approximates with the closepet granite.
Proterozoic evolution of eastern dharwar and bastar cratons, india an overview of the intracratonic basins, craton margins and mobile belts. Martin, 1986, greenstone belts and 3 late calcalkaline to krich 1994. The western dharwar craton wdc is located in southwest india and is bound to the east by the eastern dharwar craton edc, to the west by the arabian sea, and to the south by a transition into the socalled southern granulite. Furthermore, several granitic intrusives dot the east dharwar crust, among which. Petrogenesis of an alkaline lamprophyre camptonite with ocean. Structural mapping of southern part of kadiri schist belt, eastern. Implications for paleoreconstructions and support for a. Pdf granitic rocks underlying deccan trap along the margin. Petrogenesis of lamprophyres synchronous to kimberlites. The craton is generally divided into two blocks as western and eastern dharwar craton based on the nature, abundance and age of greenstone belts, basement gneisses and degree of metamorphism swami nath and. The metamorphic rocks of the eastern dharwar craton show an. Pdf discovery of lamproites near vattikod area, nw. Geological mapping, petrographic study and field relation of. Two types of archaean supracrustal belts in the bundelkhand craton.
Remnant of proterozoic platformal cover sequence of bhimakurnool age. Evidence for metamorphic and hydrothermal phases from the hirabuddini deposit, raichur district, karnataka, india, journal of earth system science 127, no. Dharwar craton is divided into two tectonic blocks in the year 1986 by rogers. The craton is divided into two blocks, the eastern dharwar craton edc and the western dharwar craton wdc, with apparently distinct histories of crustal evolution chadwick et al. Neoarchean greenstone metamorphism in the eastern dharwar. We suggest that the deeper mantle source region of the kimberlites was more pristine and devoid of subduction. Upb baddeleyite ages from mafic dyke swarms in dharwar craton. Geoelectric structure of the dharwar craton from magnetotelluric. Important new work on lithostratigraphy, basin development, structure, geochemistry and geochronology has led to wideranging speculation on the late archaean plate tectonic setting. Dilip saha, sarbani patranabisdeb proterozoic evolution of eastern dharwar and bastar cratons, india an overview of the intracratonic basins, craton margins and mobile belts, journal of asian earth sciences 91 sep 2014. Boninites from the neoarchaean gadwal greenstone belt. Analytical techniques nine kimberlite samples, free from visible crustal contamination, have been collected from various exposed domains of the. It is separated by the chitradurga shear zone close to the closepet granite. Free download, read and cite papers for your scientific research and study.
It lies to ene of the dharwar craton dc, separated from the latter by the godavari rift. A prominent shear zone located along the eastern margin of the chitradurga greenstone belt, the chitradurga. We show that kimberlites and associated magmas were emplaced for a longer duration ca. Subductionrelated origin of eclogite xenoliths from the wajrakarur kimberlite field, eastern dharwar craton, southern india.
Late archaean 2550 2520 ma juvenile magmatism in the eastern dharwar craton. Pdf discovery of lamproites near vattikod area, nw margin. Thus the geoelectric structure is strongly influenced by the phase data, which is free from the static problem. The tectonics of the eastern dharwar craton and eastern ghats mobile belt can therefore be compared to the subduction and collision related to the diamondiferous kimberley and witwatersrand blocks, which represent the western and eastern domains of the kaapvaal craton, respectively e. However, the nature of crustal growth including the mechanism and tectonic setting of the neoarchaean are controversial issues.
Subductionrelated origin of eclogite xenoliths from the. The various parts of cudappah igneous provice cipprakasham alkaline province pap of the eastern dharwar craton edc, southern india is known for the occurrence of lamprophyre. The dharwar craton in the southern part of the indian shield comprises two distinct blocks viz. Proterozoic evolution of eastern dharwar and bastar. Pdf archaean highmg granitoids of mantle origin in the. Synplutonic mafic dykes from late archaean granitoids in the. The nkf kimberlites, in general, are very small bodies and these kimberlites lack mantle xenoliths 25. In spite of detailed geological investigations of the dharwar craton since the 1890s, its principal lithological units, structure and chronology remain contentious. Palaeomagnetic and rockmagnetic behaviour of dykes from. Geochemical characterization and geodynamic implication of n. Dharwar craton introduction and its extension classification difference between wdc and edc western dharwar craton eastern dharwar craton lithology dharwar supracrustal rocks sargur group bababudan group chitradurga group greenstone belts younger granites closepet granite regional structure metamorphism life economic.
Pdf new palaeomagnetic and rock magnetic results on. Issues and limitations of broad band remote sensing of. Edc consists of the older gneisses, greenstone belts of dharwar super group, closepet granite and charnokites. Subduction tectonics in the evolution of the eastern. The mudigubba lamprophyres are free from crustal xenoliths, and have a. Petrology and geochemistry of late archaean granitoids in the. Geology of dharwar craton the archaean dharwar craton is a typical granitegreenstone terrane with a gneissic basement of tonalitetrondhjemitegranodiorite ttg composition known as peninsular gneisses naqvi and rogers, 1987. Contrasting isotopic mantle sources for proterozoic lamproites and kimberlites from the cuddapah basin and eastern dharwar craton. Dec 11, 2017 conclusion dharwar craton is a classical greenstonegranite terrain, divided into western and eastern dharwar craton. Continental lithosphere growth by accretion of diverse plume and arc terranes.
Found in abundance in the dharwar district of karnataka. Pdf on nov 12, 2016, ashutosh pandey and others published origin of clinopyroxene megacrysts from the udiripikonda lamprophyre, eastern dharwar craton, southern india find, read and cite all. Western dharwar craton eastern dharwar craton these 2 cratons divided by the chitradurga shear zone. Strain patterns, dkollement and incipient sagducted. Limestone xenolith in siddanpalli kimberlite, gadwal granite.
We present here a comprehensive mineralogical and geochemical including sr and nd isotopic study on the lamproites from the vattikod field, exposed in the vicinity of the wellstudied ramadugu. Limestone xenolith in siddanpalli kimberlite, gadwal. Mafic xenoliths in proterozoic kimberlites from eastern. Clinopyroxene and garnet mantle cargo in kimberlites as. The eastern part of the craton is dominated by late archaean 2. Abstractthe archaean dharwar craton is characterized by two greenstone successions. Dharwar craton whereas nac is placed to the east of the dharwar craton. Seismic imaging of crust beneath the dharwar craton, india. Kunda v badhe, h s pandalai evolution of huttimaski greenstone belt of the eastern dharwar craton. Imaging mantle lithosphere for diamond prospecting in. Discovery of lamproites near vattikod area, nw margin of the cuddapah basin, eastern dharwar craton, southern india. Download this share file about petrological characteristics of the peddavura schist belt and adjacent rocks in eastern dharwar craton in parts of nalgonda district, telangana state from eduzhais vast library of public domain share files. Narayanpet kimberlites are emplaced in granodiorites and gneisses and structurally controlled by ew and nesw trending lineament 15.
The closepet granite is divided in to 3 depth zones 1. Petrogenesis of the craterfacies tokapal kimberlite pipe. Oct 01, 2016 read palaeomagnetic and rockmagnetic behaviour of dykes from hyderabad granitic region, part of eastern dharwar craton, southern india, acta geologica sinica english edition on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Petrology, genesis and geodynamic implication of the. The contact between the eastern dharwar craton with the deccan trap, in the vertical section, is less studied structurally. Pdf evidence of mafic and ultramafic magmatism exists in many parts of the dharwar craton which is divided into two blocks, the west. Contrasting crustal evolution processes in the dharwar craton.
Limestone xenolith in siddanpalli kimberlite, gadwal granitegreenstone terrain, eastern dharwar craton, southern india. Arcgis studies and field relationships of paleoproterozoic. Kanigiri melange 860 the rifting of the eastern dharwar craton margin as suggested on the basis of 861 the deformed alkaline. The geodynamic evolution of the eastern dharwar craton, southern india, is widely. The dharwar craton, southern india, and its late archaean plate. Pdf limestone xenolith in siddanpalli kimberlite, gadwal. In the observed d 1 to d 5 deformation sequence at hutti, the proximal biotite alteration zones, containing isoclinally folded quartz veins d 2 and the laminated faultfill veins d.
The geologic events responsible for jonnagiri started with accretion of the greenstone package at the subduction boundary between the eastern and western blocks of the dharwar craton, followed by their deformation, shearing, and metamorphism, with subsequent emplacement of the pagadarayi granodiorite and continued shearing, culminating with. Quartzfree sapphirine granulites and mafic granulites record the highest pt. Archaean volcanosedimentary schist belts in the eastern part of the craton hu. Pdf contrasting isotopic mantle sources for proterozoic. The xenolith is unmetamorphosed, is extremely fine grained micritic, and displays laminations characteristic of sedimentary carbonate rocks. Aug 12, 2017 081217 23 western dharwar craton wdc eastern dharwar craton edc 1. Subduction tectonics in the evolution of the eastern dharwar. Eastern dharwar craton greenstone belts of dharwar supergroup the edc is characterized by volcanicsdominated,sedimentpoor and goldrich belts,in contrast to those of wdc. Metamorphism, fluid flux, and fluid evolution relative to. A field study at the margin of the deccan trap with east dharwar craton. Garnets in kyanitebearing samples are rich in grossular, whereas they are predominantly pyropealmandines in the bimineralic kyanite free samples.
Petrological characteristics of the peddavura schist belt. Present paper reports a lamprophyre dyke near the thirtal area, khammam district, telangana, india 80 0 08 0. The dharwar craton of india is an archaean craton intruded by several different generations of mainly pal. Vikash tripathy geological survey of india academia. The girar belt, located in the southern part of the craton, consists generally of metasedimentary. Pdf subductionrelated origin of eclogite xenoliths from. The eastern dharwar craton edc exposes widespread neoarchaean granitegreenstone belts.
Paleoproterozoic cordilleranstyle accretion along the south eastern margin of the eastern dharwar craton. All the rocks in the dharwar craton are archean to late proterozoic in age. The dharwar or karnataka craton in south india is a piece of the earths crust that dates back to the late archean. Peninsular gneiss, 3000 ma basement having angular unconformity with the dharwar marked by qpc.
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