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NARROW
GeoRef Subject
-
all geography including DSDP/ODP Sites and Legs
-
Africa
-
Madagascar (1)
-
Southern Africa
-
Namaqualand metamorphic complex (1)
-
South Africa (1)
-
-
-
Antarctica
-
East Antarctica (3)
-
-
Asia
-
Indian Peninsula
-
Bangladesh (1)
-
Godavari River (1)
-
India
-
Andhra Pradesh India
-
Cuddapah Basin (4)
-
Khammam India (1)
-
Nellore India (1)
-
Nellore mica belt (2)
-
Srikakulam India (1)
-
Visakhapatnam India (3)
-
-
Bastar Craton (5)
-
Bundelkhand (1)
-
Cauvery Basin (1)
-
Chhattisgarh India
-
Bastar India (1)
-
-
Deccan Plateau (5)
-
Dharwar Craton (12)
-
Ghats
-
Eastern Ghats (60)
-
Western Ghats (29)
-
-
Gujarat India
-
Kutch India (1)
-
Saurashtra (1)
-
-
Karnataka India
-
Chitradurga schist belt (1)
-
-
Kerala India
-
Trivandrum India (1)
-
-
Krishna River (1)
-
Madhya Pradesh India (2)
-
Maharashtra India
-
Koyna Dam (2)
-
Koyna River (1)
-
Poona India (1)
-
-
Narmada-Son Lineament (1)
-
Orissa India (10)
-
Rajasthan India (2)
-
Satpura Range (2)
-
Southern Granulite Terrain (5)
-
Tamil Nadu India (4)
-
West Bengal India (1)
-
-
Indian Shield (4)
-
-
Krasnoyarsk Russian Federation
-
Taymyr Dolgan-Nenets Russian Federation
-
Norilsk region (1)
-
Norilsk Russian Federation (1)
-
-
-
Vindhyan Basin (1)
-
-
Australasia
-
Australia
-
Western Australia (1)
-
-
-
Chicxulub Crater (1)
-
Commonwealth of Independent States
-
Russian Federation
-
Krasnoyarsk Russian Federation
-
Taymyr Dolgan-Nenets Russian Federation
-
Norilsk region (1)
-
Norilsk Russian Federation (1)
-
-
-
-
-
Indian Ocean
-
Bay of Bengal (1)
-
Bengal Fan (1)
-
-
Indian Ocean Islands
-
Madagascar (1)
-
-
Southern Ocean
-
Prydz Bay (1)
-
-
-
commodities
-
barite deposits (1)
-
bauxite deposits (3)
-
construction materials (1)
-
diamond deposits (2)
-
fluorspar deposits (1)
-
graphite deposits (2)
-
metal ores
-
copper ores (1)
-
IOCG deposits (1)
-
manganese ores (1)
-
nickel ores (1)
-
niobium ores (1)
-
rare earth deposits (1)
-
strontium ores (1)
-
tungsten ores (1)
-
-
mineral deposits, genesis (4)
-
mineral exploration (1)
-
mineral resources (1)
-
phosphate deposits (1)
-
placers
-
beach placers (1)
-
-
-
elements, isotopes
-
carbon
-
C-13/C-12 (1)
-
-
chemical ratios (1)
-
halogens
-
chlorine (1)
-
fluorine (2)
-
-
isotope ratios (7)
-
isotopes
-
radioactive isotopes
-
Pb-206/Pb-204 (1)
-
Rb-87/Sr-86 (1)
-
Sm-147/Nd-144 (1)
-
-
stable isotopes
-
C-13/C-12 (1)
-
Hf-177/Hf-176 (1)
-
Nd-144/Nd-143 (3)
-
O-18/O-16 (2)
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-206 (1)
-
Rb-87/Sr-86 (1)
-
Sm-147/Nd-144 (1)
-
Sr-87/Sr-86 (4)
-
-
-
Lu/Hf (1)
-
metals
-
actinides
-
thorium (1)
-
uranium (1)
-
-
alkali metals
-
potassium (2)
-
rubidium
-
Rb-87/Sr-86 (1)
-
-
sodium (1)
-
-
alkaline earth metals
-
calcium (3)
-
magnesium (1)
-
strontium
-
Rb-87/Sr-86 (1)
-
Sr-87/Sr-86 (4)
-
-
-
aluminum (1)
-
chromium (1)
-
hafnium
-
Hf-177/Hf-176 (1)
-
-
lead
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-206 (1)
-
-
manganese (1)
-
platinum group (2)
-
rare earths
-
neodymium
-
Nd-144/Nd-143 (3)
-
Sm-147/Nd-144 (1)
-
-
samarium
-
Sm-147/Nd-144 (1)
-
-
-
-
oxygen
-
O-18/O-16 (2)
-
-
-
fossils
-
Chordata
-
Vertebrata
-
Tetrapoda
-
Reptilia
-
Diapsida
-
Archosauria
-
dinosaurs (1)
-
-
-
-
-
-
-
Invertebrata
-
Arthropoda
-
Mandibulata
-
Insecta
-
Pterygota
-
Neoptera
-
Endopterygota
-
Hymenoptera (1)
-
-
-
-
-
-
-
-
palynomorphs
-
miospores
-
pollen (1)
-
-
-
-
geochronology methods
-
Ar/Ar (4)
-
Lu/Hf (1)
-
paleomagnetism (4)
-
Pb/Pb (1)
-
Rb/Sr (3)
-
Re/Os (1)
-
Sm/Nd (4)
-
thermochronology (1)
-
U/Pb (11)
-
U/Th/Pb (3)
-
-
geologic age
-
Cenozoic
-
Quaternary
-
upper Quaternary (1)
-
-
Tertiary
-
Neogene
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Miocene (1)
-
-
Paleogene
-
Eocene (1)
-
Paleocene
-
lower Paleocene
-
K-T boundary (4)
-
-
-
-
upper Tertiary (1)
-
-
-
Mesozoic
-
Cretaceous
-
Upper Cretaceous
-
K-T boundary (4)
-
-
-
-
Paleozoic
-
Cambrian (3)
-
-
Precambrian
-
Archean
-
Mesoarchean (2)
-
Napier Complex (1)
-
Neoarchean
-
Dharwar Supergroup (1)
-
Sargur Group (1)
-
-
Paleoarchean (2)
-
Singhbhum Granite (1)
-
-
Bijawar System (1)
-
upper Precambrian
-
Mahakoshal Group (1)
-
Proterozoic
-
Mesoproterozoic (7)
-
Neoproterozoic
-
Tonian (1)
-
-
Paleoproterozoic (4)
-
-
-
-
Vindhyan (1)
-
-
igneous rocks
-
igneous rocks
-
carbonatites (1)
-
kimberlite (1)
-
plutonic rocks
-
anorthosite (4)
-
diorites
-
ferrodiorite (1)
-
-
gabbros
-
norite (1)
-
-
granites
-
A-type granites (2)
-
charnockite (10)
-
leucogranite (1)
-
-
lamproite (2)
-
pegmatite (2)
-
syenites
-
nepheline syenite (1)
-
-
ultramafics
-
pyroxenite (1)
-
-
-
volcanic rocks
-
basalts
-
alkali basalts (1)
-
flood basalts (6)
-
mid-ocean ridge basalts (1)
-
ocean-island basalts (1)
-
-
pyroclastics
-
ignimbrite (1)
-
tuff (1)
-
-
rhyolites (1)
-
-
-
ophiolite (2)
-
-
metamorphic rocks
-
metamorphic rocks
-
amphibolites (1)
-
gneisses
-
orthogneiss (1)
-
paragneiss (1)
-
-
granulites (22)
-
metaigneous rocks
-
meta-anorthosite (1)
-
-
metasedimentary rocks
-
khondalite (4)
-
metapelite (2)
-
paragneiss (1)
-
-
migmatites (3)
-
quartzites (1)
-
schists (1)
-
-
ophiolite (2)
-
-
minerals
-
minerals (5)
-
native elements
-
graphite (1)
-
-
oxides
-
corundum (1)
-
cryptomelane (2)
-
franklinite (1)
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goethite (1)
-
hematite (1)
-
iron oxides (1)
-
magnetite (1)
-
spinel (3)
-
titanomagnetite (1)
-
ulvospinel (1)
-
-
phosphates
-
apatite (3)
-
monazite (7)
-
-
silicates
-
chain silicates
-
aenigmatite group
-
sapphirine (5)
-
-
amphibole group
-
clinoamphibole
-
arfvedsonite (1)
-
hastingsite (1)
-
hornblende (1)
-
pargasite (1)
-
richterite (1)
-
-
-
pyroxene group
-
clinopyroxene (2)
-
orthopyroxene (4)
-
-
-
framework silicates
-
feldspar group
-
alkali feldspar
-
K-feldspar (2)
-
-
plagioclase (6)
-
-
myrmekite (2)
-
nepheline group
-
nepheline (1)
-
-
pseudoleucite (1)
-
silica minerals
-
quartz (3)
-
-
zeolite group (1)
-
-
orthosilicates
-
nesosilicates
-
garnet group (5)
-
olivine group
-
olivine (1)
-
-
sillimanite (3)
-
titanite group
-
titanite (1)
-
-
zircon group
-
zircon (12)
-
-
-
sorosilicates
-
chevkinite group
-
perrierite (1)
-
-
kornerupine (1)
-
-
-
sheet silicates
-
clay minerals
-
kaolinite (1)
-
smectite (1)
-
-
mica group
-
biotite (3)
-
phlogopite (1)
-
-
-
-
sulfides
-
copper sulfides (1)
-
nickel sulfides (1)
-
-
-
Primary terms
-
absolute age (19)
-
Africa
-
Madagascar (1)
-
Southern Africa
-
Namaqualand metamorphic complex (1)
-
South Africa (1)
-
-
-
Antarctica
-
East Antarctica (3)
-
-
Asia
-
Indian Peninsula
-
Bangladesh (1)
-
Godavari River (1)
-
India
-
Andhra Pradesh India
-
Cuddapah Basin (4)
-
Khammam India (1)
-
Nellore India (1)
-
Nellore mica belt (2)
-
Srikakulam India (1)
-
Visakhapatnam India (3)
-
-
Bastar Craton (5)
-
Bundelkhand (1)
-
Cauvery Basin (1)
-
Chhattisgarh India
-
Bastar India (1)
-
-
Deccan Plateau (5)
-
Dharwar Craton (12)
-
Ghats
-
Eastern Ghats (60)
-
Western Ghats (29)
-
-
Gujarat India
-
Kutch India (1)
-
Saurashtra (1)
-
-
Karnataka India
-
Chitradurga schist belt (1)
-
-
Kerala India
-
Trivandrum India (1)
-
-
Krishna River (1)
-
Madhya Pradesh India (2)
-
Maharashtra India
-
Koyna Dam (2)
-
Koyna River (1)
-
Poona India (1)
-
-
Narmada-Son Lineament (1)
-
Orissa India (10)
-
Rajasthan India (2)
-
Satpura Range (2)
-
Southern Granulite Terrain (5)
-
Tamil Nadu India (4)
-
West Bengal India (1)
-
-
Indian Shield (4)
-
-
Krasnoyarsk Russian Federation
-
Taymyr Dolgan-Nenets Russian Federation
-
Norilsk region (1)
-
Norilsk Russian Federation (1)
-
-
-
Vindhyan Basin (1)
-
-
Australasia
-
Australia
-
Western Australia (1)
-
-
-
barite deposits (1)
-
bauxite deposits (3)
-
carbon
-
C-13/C-12 (1)
-
-
Cenozoic
-
Quaternary
-
upper Quaternary (1)
-
-
Tertiary
-
Neogene
-
Miocene (1)
-
-
Paleogene
-
Eocene (1)
-
Paleocene
-
lower Paleocene
-
K-T boundary (4)
-
-
-
-
upper Tertiary (1)
-
-
-
Chordata
-
Vertebrata
-
Tetrapoda
-
Reptilia
-
Diapsida
-
Archosauria
-
dinosaurs (1)
-
-
-
-
-
-
-
construction materials (1)
-
continental drift (1)
-
crust (14)
-
crystal chemistry (3)
-
crystal growth (2)
-
crystal structure (1)
-
deformation (4)
-
diamond deposits (2)
-
earthquakes (7)
-
ecology (1)
-
economic geology (2)
-
faults (14)
-
fluorspar deposits (1)
-
folds (1)
-
foliation (1)
-
fractures (3)
-
geochemistry (11)
-
geomorphology (5)
-
geophysical methods (3)
-
graphite deposits (2)
-
ground water (1)
-
heat flow (1)
-
hydrology (5)
-
igneous rocks
-
carbonatites (1)
-
kimberlite (1)
-
plutonic rocks
-
anorthosite (4)
-
diorites
-
ferrodiorite (1)
-
-
gabbros
-
norite (1)
-
-
granites
-
A-type granites (2)
-
charnockite (10)
-
leucogranite (1)
-
-
lamproite (2)
-
pegmatite (2)
-
syenites
-
nepheline syenite (1)
-
-
ultramafics
-
pyroxenite (1)
-
-
-
volcanic rocks
-
basalts
-
alkali basalts (1)
-
flood basalts (6)
-
mid-ocean ridge basalts (1)
-
ocean-island basalts (1)
-
-
pyroclastics
-
ignimbrite (1)
-
tuff (1)
-
-
rhyolites (1)
-
-
-
inclusions
-
fluid inclusions (2)
-
-
Indian Ocean
-
Bay of Bengal (1)
-
Bengal Fan (1)
-
-
Indian Ocean Islands
-
Madagascar (1)
-
-
intrusions (10)
-
Invertebrata
-
Arthropoda
-
Mandibulata
-
Insecta
-
Pterygota
-
Neoptera
-
Endopterygota
-
Hymenoptera (1)
-
-
-
-
-
-
-
-
isotopes
-
radioactive isotopes
-
Pb-206/Pb-204 (1)
-
Rb-87/Sr-86 (1)
-
Sm-147/Nd-144 (1)
-
-
stable isotopes
-
C-13/C-12 (1)
-
Hf-177/Hf-176 (1)
-
Nd-144/Nd-143 (3)
-
O-18/O-16 (2)
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-206 (1)
-
Rb-87/Sr-86 (1)
-
Sm-147/Nd-144 (1)
-
Sr-87/Sr-86 (4)
-
-
-
land use (1)
-
lava (1)
-
magmas (5)
-
mantle (7)
-
Mesozoic
-
Cretaceous
-
Upper Cretaceous
-
K-T boundary (4)
-
-
-
-
metal ores
-
copper ores (1)
-
IOCG deposits (1)
-
manganese ores (1)
-
nickel ores (1)
-
niobium ores (1)
-
rare earth deposits (1)
-
strontium ores (1)
-
tungsten ores (1)
-
-
metals
-
actinides
-
thorium (1)
-
uranium (1)
-
-
alkali metals
-
potassium (2)
-
rubidium
-
Rb-87/Sr-86 (1)
-
-
sodium (1)
-
-
alkaline earth metals
-
calcium (3)
-
magnesium (1)
-
strontium
-
Rb-87/Sr-86 (1)
-
Sr-87/Sr-86 (4)
-
-
-
aluminum (1)
-
chromium (1)
-
hafnium
-
Hf-177/Hf-176 (1)
-
-
lead
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-206 (1)
-
-
manganese (1)
-
platinum group (2)
-
rare earths
-
neodymium
-
Nd-144/Nd-143 (3)
-
Sm-147/Nd-144 (1)
-
-
samarium
-
Sm-147/Nd-144 (1)
-
-
-
-
metamorphic rocks
-
amphibolites (1)
-
gneisses
-
orthogneiss (1)
-
paragneiss (1)
-
-
granulites (22)
-
metaigneous rocks
-
meta-anorthosite (1)
-
-
metasedimentary rocks
-
khondalite (4)
-
metapelite (2)
-
paragneiss (1)
-
-
migmatites (3)
-
quartzites (1)
-
schists (1)
-
-
metamorphism (22)
-
metasomatism (1)
-
mineral deposits, genesis (4)
-
mineral exploration (1)
-
mineral resources (1)
-
mineralogy (1)
-
minerals (5)
-
Mohorovicic discontinuity (3)
-
orogeny (9)
-
oxygen
-
O-18/O-16 (2)
-
-
paleoclimatology (1)
-
paleogeography (2)
-
paleomagnetism (4)
-
Paleozoic
-
Cambrian (3)
-
-
palynomorphs
-
miospores
-
pollen (1)
-
-
-
paragenesis (6)
-
petrology (8)
-
phase equilibria (5)
-
phosphate deposits (1)
-
placers
-
beach placers (1)
-
-
plate tectonics (14)
-
pollution (1)
-
Precambrian
-
Archean
-
Mesoarchean (2)
-
Napier Complex (1)
-
Neoarchean
-
Dharwar Supergroup (1)
-
Sargur Group (1)
-
-
Paleoarchean (2)
-
Singhbhum Granite (1)
-
-
Bijawar System (1)
-
upper Precambrian
-
Mahakoshal Group (1)
-
Proterozoic
-
Mesoproterozoic (7)
-
Neoproterozoic
-
Tonian (1)
-
-
Paleoproterozoic (4)
-
-
-
-
remote sensing (3)
-
roads (2)
-
sedimentary rocks
-
bauxite (2)
-
chemically precipitated rocks
-
duricrust (1)
-
-
clastic rocks
-
graywacke (1)
-
shale (1)
-
-
-
sedimentation (1)
-
sediments
-
clastic sediments
-
sand (1)
-
-
-
slope stability (2)
-
soil mechanics (1)
-
soils
-
laterites (6)
-
-
Southern Ocean
-
Prydz Bay (1)
-
-
stratigraphy (1)
-
structural analysis (1)
-
tectonics
-
neotectonics (2)
-
-
tectonophysics (1)
-
weathering (3)
-
-
rock formations
-
Deccan Traps (11)
-
Siberian Traps (1)
-
-
sedimentary rocks
-
sedimentary rocks
-
bauxite (2)
-
chemically precipitated rocks
-
duricrust (1)
-
-
clastic rocks
-
graywacke (1)
-
shale (1)
-
-
-
-
sediments
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sediments
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clastic sediments
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sand (1)
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soils
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paleosols (1)
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soils
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laterites (6)
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Ghats
The Central Indian Tectonic Zone: A Rodinia supercontinent-forming collisional zone and analogy with the Grenville and Sveconorwegian orogens
Ubiquitous Chemical Signature in Khondalites of Eastern Ghats Granulite Belt, a Possible Explanation
Honey-producing bee–pollen–vegetation relationships in the West Coast and Western Ghats of India
Effect of Geological, Mineralogical Characteristics on Grindability of Bauxite: A Case Study of Indian Lateritic Bauxite Deposits
A red bole zircon record of cryptic silicic volcanism in the Deccan Traps, India
The interrelationship between electrical resistivity and V P / V S ratio: A novel approach to constrain the subsurface resistivity structure in data gap areas in a seismogenic zone
Development of Crustal-Scale Shear Zones at the Singhbhum Craton–Eastern Ghats Belt Boundary Region: A Critical Review of the Mesoarchean–Neoproterozoic Odyssey
Crustal Density and Susceptibility Structure beneath Achankovil Shear Zone, India
Geotechnical Investigation and Numerical Analysis of Slope Failure: A Case Study of Landslide Vulnerability Zone in Kolli Hills, Tamil Nadu
Proterozoic Magmatism in the Nallamalai Fold Belt and Adjoining Nellore Schist Belt, Eastern Dharwar Craton: Tectonic implications
Report on the Webinar No. 25 on ‘Ramnadi Restoration Mission’ , 29 th November, 2020, Pune
Evolution of the Eastern Ghats Belt, India: A Magmatic Perspective
Abstract Granitoids form the dominant component of Archean cratons. They are generated by partial melting of diverse crustal and mantle sources and subsequent differentiation of the primary magmas, and are formed through a variety of geodynamic processes. Granitoids, therefore, are important archives for early Earth lithospheric evolution. Peninsular India comprises five cratonic blocks bordered by mobile belts. The cratons that stabilized during the Paleoarchean–Mesoarchean (Singhbhum and Western Dharwar) recorded mostly diapirism or sagduction tectonics. Conversely, cratons that stabilized during the late Neoarchean (Eastern Dharwar, Bundelkhand, Bastar and Aravalli) show evidence consistent with terrane accretion–collision in a convergent setting. Thus, the Indian cratons provide testimony to a transition from a dominantly pre-plate tectonic regime in the Paleoarchean–Mesoarchean to a plate-tectonic-like regime in the late Neoarchean. Despite this diversity, all five cratons had a similar petrological evolution with a long period (250–850 myr) of episodic tonalite–trondhjemite–granodiorite (TTG) magmatism followed by a shorter period (30–100 myr) of granitoid diversification (sanukitoid, K-rich anatectic granite and A-type granite) with signatures of input from both mantle and crust. The contributions of this Special Publication cover diverse granitoid-related themes, highlighting the potential of Indian cratons in addressing global issues of Archean crustal evolution.
Origin of orthopyroxene-bearing felsic gneiss from the perspective of ultrahigh-temperature metamorphism: an example from the Chilka Lake migmatite complex, Eastern Ghats Belt, India
Koyna-Warna Shallow Seismic Region, India: Is there Any Geomorphic Expression of Active Tectonics?
Gravity of Dharwar Craton, Southern Indian Shield
The Deccan Volcanic Province (DVP), India: A Review: Part 2: Geochemistry, petrological evolution, petrogenesis, mantle sources, age and erupted volume relations, Upper Cretaceous-Palaeogene (K-Pg) mass extinctions, economic aspects, summary and future studies in DVP
ABSTRACT We conducted a detailed rock magnetic and mineralogical study of bole beds from the Deccan magmatic province, India. Magnetic susceptibility of 15 bole beds showed two contrasting patterns, with susceptibility values either increasing or decreasing up the profile. We then focused on two representatives red boles located in the Western Ghats, the RBB and RBAN profiles, to unravel the nature and origin of these contrasting magnetic susceptibility patterns. The presence of smectite argues against significant secondary thermal alterations. Major-elemental compositions obtained by X-ray fluorescence spectrometry of RBB and RBAN red boles are comparable to the parent basalt and show significant and typical depletion of mobile elements such as sodium and calcium compared to the parent basalt. The Ti/Al ratio of both the red boles and their overlying clay layers is close to the typical value of Deccan basalt (0.2), suggesting that the material of the red boles has been derived from weathering of the parent basalt. The chemical index of alteration varies from 40–50 in the parent basalt to 80–90 at the top of the bole beds, consistent with moderate to intense weathering of the bole beds. However, similar to other Deccan bole beds, indices of lateritization below 50 suggest that the state of lateritization has not been reached. Although the RBB and RBAN profiles share similar mineralogical signatures, their magnetic mineral assemblages are distinctly different. In the RBB profile, magnetic susceptibility decreases up-profile as a result of oxidation/dissolution of primary titanomagnetite inherited from the parent basalt, with subsequent formation of pedogenic hematite and superparamagnetic particles. In contrast, magnetic susceptibility in the RBAN profile, which contains magnetite, some hematite, and goethite, increases up-profile. The increase in the magnetic signal is mainly due to the increasing amounts of phyllosilicate and goethite, while the content of magnetite and hematite remains constant along the profile. We attribute the variation in the magnetic mineral assemblage to contrasting humid and dry environments during weathering, leading to the preferential formation of goethite or hematite, respectively. The combined mineralogical and rock magnetic data suggest the existence of a single weathering profile involving soil formation in the two studied red boles, with few or no contributions from an external source.