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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Africa
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Madagascar (2)
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Asia
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Indian Peninsula
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Bangladesh (1)
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India
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Ghats
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Orissa India (1)
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Primary terms
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absolute age (11)
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Africa
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Madagascar (2)
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Asia
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Indian Peninsula
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Bangladesh (1)
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India
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Andhra Pradesh India
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Cuddapah Basin (1)
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Bastar Craton (3)
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Bundelkhand (2)
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Cauvery Basin (1)
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Deccan Plateau (1)
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Dharwar Craton (9)
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Ghats
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Eastern Ghats (4)
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Western Ghats (1)
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Karnataka India (3)
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Kerala India
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Trivandrum India (1)
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Orissa India (1)
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Southern Granulite Terrain (29)
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alkali metals
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rubidium (1)
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alkaline earth metals
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barium (1)
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hafnium
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Hf-177/Hf-176 (3)
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lead
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Pb-206/Pb-204 (1)
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Pb-208 (1)
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niobium (1)
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rare earths
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lutetium (1)
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tantalum (1)
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titanium (1)
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metamorphic rocks
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amphibolites (1)
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gneisses
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orthogneiss (1)
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granulites (6)
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metaigneous rocks
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metabasite (1)
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metasedimentary rocks
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metapelite (4)
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migmatites (1)
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quartzites (1)
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schists
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Precambrian
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upper Precambrian
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sedimentary rocks
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sedimentary rocks
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Southern Granulite Terrain
Tracing the crustal evolution of the Precambrian Southern Granulite terrane in East Gondwana: New insights from zircon U-Pb/Hf geochronology
Age and petrogenesis of mafic granulites from central Madurai block, south India: implications on regional tectonics
Tectonometamorphic evolution of the Trivandrum and Southern Madurai blocks in the Southern Granulite Terrane, south India: correlation with south-central Madagascar
Metamorphic evolution of the Sittampundi Layered Complex, India, during the Archaean–Proterozoic boundary: insight from pseudosection modelling and zircon U–Pb SHRIMP geochronology
Bhaaratha Craton - The Monolithic Precambrian Terrain of the Indian Peninsula
Crustal Density and Susceptibility Structure beneath Achankovil Shear Zone, India
Evolution of the Eastern Ghats Belt, India: A Magmatic Perspective
High Ti-bearing Gabbros from Chalk Hills of Salem, Southern India: A Co-genetic Origin during Neoproterozoic Alaskan-type Evolution
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.
Seismic Evidence for Proterozoic Collisional Episodes along Two Geosutures within the Southern Granulite Province of India
Origin of corundum within anorthite megacrysts from anorthositic amphibolites, Granulite Terrane, Southern India
Extreme thermal metamorphism associated with Gondwana assembly: Evidence from sapphirine-bearing granulites of Rajapalayam, southern India
Crustal architecture and Moho topography beneath the eastern Indian and Bangladesh margins – new insights on rift evolution and the continent–ocean boundary
Garnet in the Neoproterozoic Oddanchatram Anorthosite in the Southern Granulite Terrain, India: A Petrological Puzzle
Zircon U-Pb ages and Hf isotopic systematics of charnockite gneisses from the Ediacaran–Cambrian high-grade metamorphic terranes, southern India: Constraints on crust formation, recycling, and Gondwana correlations
Strain Analysis of the Salem-Attur Shear Zone of Southern Granulite Terrane Around Salem, Tamil Nadu
Upper-mantle anisotropy beneath the south Indian Shield: Influenced by ancient and recent Earth processes
Seismological mapping of a geosuture in the Southern Granulite Province of India
Abstract The Precambrian geological history of Peninsular India covers nearly 3.0 Ga. The Peninsula is an assembly of five different cratonic nuclei known as the Aravalli–Bundelkhand, Eastern Dharwar, Western Dharwar, Bastar and Singhbhum cratons along with the Southern Granulite Province. Final amalgamation of these elements occurred either by the end of the Archaean (2.5 Ga) or by the end of the Palaeoproterozoic ( c. 1.6 Ga). Each of these nuclei contains one or more sedimentary basins (or metasedimentary basins) of Proterozoic age. This chapter provides an overview of each of the cratons and a brief description of the Precambrian sedimentary basins in India that form the focus of the remainder of this book. In our view, it appears that basin formation and subsequent closure can be grossly constrained to three separate intervals that also broadly correspond to the assembly and disaggregation of the supercontinents Columbia, Rodinia and Gondwana. The oldest Purana-I basins developed during the 2.5–1.6 Ga interval, Purana-II basins formed during the 1.6–1.0 Ga interval and the Purana-III basins formed during the Neoproterozoic–Cambrian interval.
Abstract The Southern Granulite Terrane of India exposes remnants of an interbanded sequence of orthoquartzite–metapelite–calcareous rocks across the enigmatic Palghat–Cauvery Shear Zone (PCSZ), which has been interpreted as a Pan-African terrane boundary representing the eastward extension of the Betsimisaraka Suture Zone of Madagascar. Zircon U–Pb geochronology of metasedimentary rocks from both sides of the PCSZ shows that the precursor sediments of these rocks were sourced from the Dharwar Craton and the adjoining parts of the Indian shield. The similarity of the provenance and the vestiges of Grenvillian-age orogenesis in some metasedimentary rocks contradict an interpretation that the PCSZ is a Pan-African terrane boundary. The lithological association and the likely basin formation age of the metasedimentary rocks of the Southern Granulite Terrane show remarkable similarity to the rock assemblage and timing of sedimentation of the Palaeoproterozoic to Neoproterozoic shallow-marine deposits of the Purana basins lying several hundred kilometres north of this terrane. Integrating the existing geological information, it is postulated that the shallow-marine sediments were deposited on a unified land-mass consisting of a large part of Madagascar and the Indian shield that existed before Neoproterozoic time, part of which was later involved in the Pan-African orogeny. Supplementary material: Details of the zircon U–Pb LA-MC-ICP-MS analyses of samples are available at http://www.geolsoc.org.uk/SUP18793 .