Implications of super dense carbonic and hypersaline fluid inclusions in granites from the Ranchi area, Chottanagpur Gneissic Complex, Eastern India

Mishra, Biswajit; Saravanan, C. Sakthi; Bhattacharya, Abhijit; Goon, S.; Mahato, Souradeep; Bernhardt, Heinz-Jürgen

doi:10.1016/j.gr.2006.09.002

Cited by 11 publications

(3 citation statements)

References 58 publications

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“…The result is nearly consistent with available palaeodepth estimates for pegmatite and aplite veins intruding the dioritic rocks ($16 km/$4.8 kbar; and also for plutonic rocks in the Central Indian Tectonic Zone ($17 km/P5 kbar; Mishra et al, 2007). As the basement rocks in the study area is located close to the surface, the thickness of eroded rocks after the crystallization of the dioritic rocks can be estimated to be $17-22 km from the pressure range.…”

Section: Emplacement Depth and Exhumation Historysupporting

confidence: 87%

“…Geothermobarometric studies coupled with fluid inclusion studies are important tools for the estimation of pressure and temperature (P-T) conditions of crystallization of igneous rocks (e.g., Anderson and Smith, 1995;Tulloch and Challis, 2000;Zhang et al, 2006;Mishra et al, 2007;. In this study, we apply hornblende thermobarometry to the dioritic rocks from Maddhapara area in northwestern Bangladesh to estimate their P-T conditions of crystallization.…”

Section: Introductionmentioning

confidence: 99%

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Geothermobarometry and fluid inclusions of dioritic rocks in Bangladesh: Implications for emplacement depth and exhumation rate

Hossain

Tsunogae

Rajesh

2009

Journal of Asian Earth Sciences

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Section: Emplacement Depth and Exhumation Historysupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Geothermobarometry and fluid inclusions of dioritic rocks in Bangladesh: Implications for emplacement depth and exhumation rate

Hossain

Tsunogae

Rajesh

2009

Journal of Asian Earth Sciences

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“…The gneiss complex consists of a basement of unknown age (possibly >1,750 Ma) dominated by felsic gneisses and migmatite with enclaves of pelitic and calcsilicate supracrustal rocks and mafic granulites (Dey et al., ; Karmakar et al., ; Maji et al., ; Rekha et al., ; Sanyal & Sengupta, ; Sanyal et al., ). Metapelitic and granulitic enclaves from the southern and central parts of the gneiss complex yield P–T estimates of 4 kbar, 600°C (Mishra et al., ) and 4–6 kbar, 750–850°C respectively (Bhattacharya & Mukherjee, ; Maji et al., ; Manna & Sen, ; Sen & Bhattacharya, ). The basement gneisses were intruded by porphyritic granite between 1,750 and 1,660 Ma (U–Pb in zircon; Saikia et al., ).…”

Section: Regional Geological Settingmentioning

confidence: 99%

The geological evolution of the Gangpur Schist Belt, eastern India: Constraints on the formation of the Greater Indian Landmass in the Proterozoic

Chakraborty

Upadhyay

Ranjan

et al. 2018

Journal Metamorphic Geology

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The Central Indian Tectonic Zone (CITZ) is a Proterozoic suture along which the Northern and Southern Indian Blocks are inferred to have amalgamated forming the Greater Indian Landmass. In this study, we use the metamorphic and geochronological evolution of the Gangpur Schist Belt (GSB) and neighbouring crustal units to constrain crustal accretion processes associated with the amalgamation of the Northern and Southern Indian Blocks. The GSB sandwiched between the Bonai Granite pluton of the Singhbhum craton and granite gneisses of the Chhotanagpur Gneiss Complex (CGC) links the CITZ and the North Singhbhum Mobile Belt. New zircon age data constrain the emplacement of the Bonai Granite at 3,370 ± 10 Ma, while the magmatic protoliths of the Chhotanagpur gneisses were emplaced at c. 1.65 Ga. The sediments in the southern part of the Gangpur basin were derived from the Singhbhum craton, whereas those in the northern part were derived dominantly from the CGC. Sedimentation is estimated to have taken place between c. 1.65 and c. 1.45 Ga. The Upper Bonai/Darjing Group rocks of the basin underwent major metamorphic episodes at c. 1.56 and c. 1.45 Ga, while the Gangpur Group of rocks were metamorphosed at c. 1.45 and c. 0.97 Ga. Based on thermobarometric studies and zircon–monazite geochronology, we infer that the geological history of the GSB is similar to that of the North Singhbhum Mobile Belt with the Upper Bonai/Darjing and the Gangpur Groups being the westward extensions of the southern and northern domains of the North Singhbhum Mobile Belt respectively. We propose a three‐stage model of crustal accretion across the Singhbhum craton—GSB/North Singhbhum Mobile Belt—CGC contact. The magmatic protoliths of the Chhotanagpur Gneisses were emplaced at c. 1.65 Ga in an arc setting. The earliest accretion event at c. 1.56 Ga involved northward subduction and amalgamation of the Upper Bonai Group with the Singhbhum craton followed by accretion of the Gangpur Group with the Singhbhum craton–Upper Bonai Group composite at c. 1.45 Ga. Finally, continent–continent collision at c. 0.96 Ga led to the accretion of the CGC with the Singhbhum craton–Upper Bonai Group–Gangpur Group crustal units, synchronous with emplacement of pegmatitic granites. The geological events recorded in the GSB and other units of the CITZ only partially overlap with those in the Trans North China Orogen and the Capricorn Orogen of Western Australia, indicating that these suture zones are not correlatable.

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Prograde, Peak and Retrograde Metamorphic Fluids and Associated Metasomatism in Upper Amphibolite to Granulite Facies Transition Zones

Nijland¹,

Touret

2012

Lecture Notes in Earth System Sciences

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Implications of super dense carbonic and hypersaline fluid inclusions in granites from the Ranchi area, Chottanagpur Gneissic Complex, Eastern India

Cited by 11 publications

References 58 publications

Geothermobarometry and fluid inclusions of dioritic rocks in Bangladesh: Implications for emplacement depth and exhumation rate

Geothermobarometry and fluid inclusions of dioritic rocks in Bangladesh: Implications for emplacement depth and exhumation rate

The geological evolution of the Gangpur Schist Belt, eastern India: Constraints on the formation of the Greater Indian Landmass in the Proterozoic

Prograde, Peak and Retrograde Metamorphic Fluids and Associated Metasomatism in Upper Amphibolite to Granulite Facies Transition Zones

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