The Anorthosite Complexes and Proterozoic Mobile Belt of Peninsular India: A Review

Leelanandam, C.

doi:10.1016/s0166-2635(08)70177-4

Cited by 15 publications

(6 citation statements)

References 24 publications

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“…The Eastern Ghats Granulite Belt along the east coast of India extends for over 1000 km. Major rock units in this granulite terrain are khondalites exhibiting compositional heterogeneity from sector to sector and charnockites [24] and lesser abundances of basic granulites, intrusive alkaline rocks, anorthosites [25], pyroxene granulites, syn-posttectonic granites [26], quartzites and leptynites.…”

mentioning

confidence: 99%

Rutile Mineral Chemistry as a Guide to Provenance of Red Sediments and Modern Sands of Bhimunipatnam–Konada Coast, Andhra Pradesh, East Coast of India

Naidu

Reddy

Sekhar

et al. 2019

Natl. Acad. Sci. Lett.

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Rutile is the most stable and widely distributed TiO 2 polymorph in rocks of low-to high-grade metamorphic facies and is also an accessory mineral in igneous rocks. Rutile is commonly available in modern to ancient placer mineral deposits in the coastal sediments. Mineral chemistry of rutile from red sediments and modern sands along Bhimunipatnam-Konada coast were used in the present study to know its provenance. Iron (Fe), chromium (Cr), niobium (Nb) content and their distribution pattern in rutile and also their relationships with aluminum (Al) and magnesium (Mg) concentrations provide information on its provenance. These study reveals that the Fe-Cr and Cr-Nb systematics indicates majority of rutiles were derived from metapelitic rocks mainly khondalites and leptynites of the Eastern Ghats Granulite Belt (EGGB) and minor contribution is from magmatic charnockites, pegmatites and granites. The Al and Mg behavioral pattern in rutile from both zones clearly depicts that the most of the rutiles are derived from crustal rocks. The rutile contribution to late quaternary red sediments and modern coastal sands is also from same provenance.

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confidence: 99%

Rutile Mineral Chemistry as a Guide to Provenance of Red Sediments and Modern Sands of Bhimunipatnam–Konada Coast, Andhra Pradesh, East Coast of India

Naidu

Reddy

Sekhar

et al. 2019

Natl. Acad. Sci. Lett.

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“…At Kondapalle that lies south of the Godavari Rift, a layered complex of gabbro-norite-pyroxenite-anorthosite has intruded the metapelitic granulites (Leelanandam, 1990(Leelanandam, , 1997(Leelanandam, , 2004Sengupta et al 1999). The parental magma was high-Mg basalt, and the geochemical characteristics suggest emplacement in an arc-related environment (Leelanandam and Vijaya Kumar, 2007).…”

Section: Mafic-ultramafic Rocksmentioning

confidence: 99%

“…Massif-type anorthosite complexes of varying size occur in the EGB (Leelanandam, 1990;Leelanandam and Reddy, 1998;Bolangir: Bhattacharya et al 1998;Dobmeier, 2006;Chilka: Dobmeier and Simmat, 2002;Krause et al 2001;Sarkar et al 1981;Jugsayapatna: Nanda and Panda, 1999;Turkel: Maji et al 1997). The age of these anorthosite plutons is around ~0.9 Ga (Bolangir Complex: Krause et al 2001; Chilka Lake Complex: Chatterjee et al 2008).…”

Section: Anorthositementioning

confidence: 99%

The Eastern Ghats Belt … A polycyclic granulite terrain

Mukhopadhyay

Basak

2009

J Geol Soc India

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The Eastern Ghats Belt is a polycyclic granulite terrain along the east coast of India whose western boundary is marked by a shear zone along which the granulites are thrusted over the cratonic units of the Indian shield, and its northern margin is marked by the presence of a number of fault-bounded blocks. Recent work has convincingly brought out that there are domains within the belt having different evolutionary histories. The segment south of the Godavari Rift went through a high grade thermo-tectonic event at ~1.6-1.7 Ga. North of the Godavari Rift in a narrow zone along the western boundary the last high-grade metamorphic event is of late Archaean age. A series of alkaline plutons along the western boundary zone testifies to a rifting episode at ~1.3-1.5 Ga. In the major part of the EGB the metamorphism is broadly of Grenvillian age, with two major thermo-tectonic pulses at ~1.1-1.2 Ga and ~0.95-1.0 Ga. But high grade conditions persisted for a long period and younger thermal events of ~0.65 Ga to ~0.80 Ga are locally recorded. There are differences in the tectonometamorphic histories of different domains, but the tectonic significance of these differences remains uncertain. Pan-African (0.50-0.55) thermal overprints are common and become conspicuous along the western boundary zone. The thrusting of the Eastern Ghats granulites in a hot state over the cratons to the west is of Pan-African age. In the Rodinia assembly (~0.9 Ga) the Eastern Ghats and the Rayner-Napier Complexes of Antarctica were contiguous, but the pre-Rodinia configuration of these terrains remains unclear. At ~0.8 Ga during the Rodinia break up Greater India rifted apart from East Antarctica, and only later it docked with Australia-East Antarctica at 530-550 Ma. The continuation of the East Antarctic Pan-African orogenic belts into the Eastern Ghats is yet to be ascertained.

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“…The belt has a maximum width of 100 km in the northern part and less than 20 km in the south where it is concealed under the Phanerozoic cover. The craton-mobile belt boundary is characterized by the occurrence of alkaline rocks in the Bastar and Singhbhum cratons, like those of Prakasan alkaline province in the Transition zone of Dharwar craton to the south of Godavari Graben (Leelanandam, 1990). To the east of the fold belt is the Bay of Bengal.…”

Section: Introduction: Geological Settingmentioning

confidence: 99%

Cratons and Fold Belts of India

Sharma

2010

Lecture Notes in Earth Sciences

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BC Bastar Craton BKC Bundelkhand Craton (massif) BGC Banded Gneissic Complex CGC Chhotanagpur Granite-Gneiss Complex EDC Eastern Dharwar Craton MGC Meghalaya Craton SBC Singhbhum Craton WDC Western Dharwar Craton vi A hundred times a day I remind myself that my inner and outer lives are based on the labors of other people, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving. Albert Einstein Dedicated to the memory of my sister Rajbai and her mother-in-law Bhoribai whose benevolence and guardianship helped me attain what I could. ForewordProfessor Ram Swaroop Sharma whom I affectionately address as Bhratashri has asked me to write a foreword for his book on "Cratons and Fold Belts of India". Bhratashri's wish is always my command and this foreword is written with both delight and humility. Formation of rocks to make up the continental crust and the assembly of such rocks to form a contiguous and large physiographic feature called landmass is a first order geological problem. Several other geological problems such as the formation of various landforms (mountains, plateaus and plains), various mineral deposits, development/maintenance/evolution of hydrologic cycle, climate and life, and rivers and their basins are integral parts of this first order problem. Just as the fundamental thing called water is taken for granted, so also the existence of land on earth. Although land may not be a critical environmental resource, the existence of land is critical to the physics and chemistry of the life system on earth. This basic truth, perhaps realized by Vedic men, is dawned on to the contemporary scientific community only towards the end of the twentieth century, thanks to the developing environmental problems.Our knowledge of the earth, its materials and processes, is very rapidly increasing due to advancement in technical tools of investigations and in theoretical aspects of physics, chemistry and biology. The advent of plate tectonic theory after the Second World War and the realization of environmental consequences of consumption of earth materials and ecosystem services contributed very significantly to our understanding of earth processes. Studies of the Precambrian Geology of India have made very good use of all these development as well as International scientific cooperation. Although our knowledge of the formation of India as a landmass is better today than ever before, it is still far from what is required to sustain human "civilization."Prof. Sharma's book on "Cratons and Fold Belts of India" is an excellent exposition of the current status of our knowledge of the geology of Archaean cratonic parts of the Indian landmass and of the geology and processes of formation of Proterozoic fold belts on the cratonic basements (cratonic, of course, not during Proterozoic!). The book also provides, for an uninitiated but interested, in the first three chapters, concepts of terrain and terrain making processes, major cratonic terrains of India and pro...

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The Anorthosite Complexes and Proterozoic Mobile Belt of Peninsular India: A Review

Cited by 15 publications

References 24 publications

Rutile Mineral Chemistry as a Guide to Provenance of Red Sediments and Modern Sands of Bhimunipatnam–Konada Coast, Andhra Pradesh, East Coast of India

Rutile Mineral Chemistry as a Guide to Provenance of Red Sediments and Modern Sands of Bhimunipatnam–Konada Coast, Andhra Pradesh, East Coast of India

The Eastern Ghats Belt … A polycyclic granulite terrain

Cratons and Fold Belts of India

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