A5101845724- Geological and Geochemical Analysis
- earthquake and tectonic studies
- High-pressure geophysics and materials
- Geology and Paleoclimatology Research
- Geochemistry and Geologic Mapping
- Geomagnetism and Paleomagnetism Studies
- Paleontology and Stratigraphy of Fossils
- Reservoir Engineering and Simulation Methods
- Isotope Analysis in Ecology
- Geochemistry and Elemental Analysis
- Marine and environmental studies
- Methane Hydrates and Related Phenomena
- Hydraulic Fracturing and Reservoir Analysis
- Oil and Gas Production Techniques
- Geophysical and Geoelectrical Methods
- Geological formations and processes
- Rock Mechanics and Modeling
- Dental Trauma and Treatments
- Pleistocene-Era Hominins and Archaeology
- Fish Biology and Ecology Studies
- Planetary Science and Exploration
- Geological Formations and Processes Exploration
- Identification and Quantification in Food
- Evolution and Paleontology Studies
- Drilling and Well Engineering
Presidency University
2009-2023
Presidency University
2012-2016
The evidence of a long‐lived Grenvillian orogeny around 1.0 Ga is preserved in the eastern part India form large‐scale syn‐collisional granitic activity and high‐grade metamorphism Chotanagpur Granite Gneissic Complex (CGGC). Geochemically, granitoid rocks CGGC were classified as ferroan, per‐aluminous, calc‐alkalic to alkali‐calcic S‐type granites which generated from anatexis meta‐sedimentary protolith (khondalite) volcanic‐arc setting. Relatively high crystallization temperatures...
Abstract The layered gabbro‐anorthosite suite in the eastern Indian shield is ideal for a texture based study of crystallization history mafic magma static chamber. magmatic comprises 40–150 m thick persistent layers different lithounits, which have been divided into two cycles. lower cycle (I) represented from bottom to top by gabbro, gabbronorite, leucogabbronorite, anorthositic gabbronorite and gabbro. upper (II) similar I, except that gabbro units are not present there. characteristic...
An east–west‐trending medium‐grained mafic sill containing co‐genetic Fe–Ti oxide ore lenses is found disposed within granite gneisses around Saltora‐Mejia area in the eastern part of Chotanagpur Granite Gneissic Complex (CGGC) India. CGGC considered as a Proterozoic mobile belt it witnessed multiple phases deformation and high‐ grade metamorphism during 1.8–0.8 Ga. Occurrence such ore‐bearing unique entire which vast orogenic has many voluminous felsic magmatisms. The rock gabbronorite...
Cr-spinel bearing wehrlite rocks of Bangriposi are found within the multiply deformed metasedimentary Singhbhum Group belonging to North Mobile Belt eastern India. Detailed mineralogical and geochemical studies reveal that these have suffered a two-stage alteration involving deeper level modal cryptic metasomatism subsequent shallower depth pervasive hydrothermal alteration. Cryptic is defined by elevated LREE contents its clinopyroxne grains. Metasomatism induced changes in mineralogy...
The Deccan Traps are of global interest for their possible links to Cretaceous-Tertiary (K-T) mass extinction event and climate change. Radiometric dating Trap lavas intrusions have shown that bulk the magmatic activities occurred 65 (±1) Ma. Isotopic similarity between Reunion been used as an evidence suggest magmas were supplied by Deccan-Reunion plume-head. Kutch is located in northwest India where, based on trajectory Indian plate took while crossing over plume, earliest would be...
A layered gabbro suite was emplaced around Kuliana (lat 22°3ʹN and long 86°38ʹE), Orissa, eastern India, within deformed metasedimentary rocks of the north Singhbhum mobile belt. This magmatic does not have any exposures feeder dikes, chilled margins, or other evidence for an intrusive character. Because cumulate layers do provide information about parent magma this suite, equilibrium distribution method has been utilized in study to estimate trace element concentrations melts with solid...
The NE-SW, NW-SE and E-W trending Proterozoic Newer Dolerite dykes around Chaibasa, Jharkhand, India are found to intrude Singhbhum Granites of late Archean age. Clouded plagioclase, bastitised orthopyroxene uralitized clinopyroxene, magnetite-ilmenite, quartz-feldspar granophyric intergrowth the characteristic minerals present in dolerite which assign a low grade metamorphosed character dolerite. Both olivine normative quartz varieties observed this suite dykes. These dolerites have been...
Analyses of foraminiferal δ 18 O (δ carb ), 13 C ) and bulk organic matter org across a tropical Eocene/Oligocene boundary (EOB) section from Kutch basin, western India show that the ocean cooling (at least ∼3°C) is coincident with rapid enrichment (∼3‰) in but depletion (∼1.5‰) . The decrease pCO 2 ocean‐atmosphere system boundary, possibly resulting enhanced silicate weathering rising Himalayas accompanied carbon burial ocean, caused enrichment. end‐Eocene climatic stress decreased oceanic...
The effects of deformation and concomitant high‐grade metamorphism during the Cenozoic period in active Himalayan orogen hinder reconstruction original geological framework thus evolution history. Shillong Group Plateau, northeastern India, rests unconformably above crystalline basement gneiss, is divided two formations, Lower Metapelite Formation (LMF) Upper Quartzite (UQF). There are three horizons conglomerate: (a) Basal, between Group, (b) an inter‐formational conglomerate, LMF UQF, (c)...