Deformation Structures in a Large Slump Horizon, Paleoproterozoic Vempalle Formation, Cuddapah Basin, Southern India

2020 ◽  
pp. 000-000
Author(s):  
Sayani Khan ◽  
Tuasha Majumder ◽  
Sarbani Patranabis-Deb ◽  
Dilip Saha
Keyword(s):  
Southern India ◽  
Cuddapah Basin ◽  
Deformation Structures ◽  
Vempalle Formation

Metamorphic chronology of the Precambrian provinces of South India

1968 ◽  
Vol 5 (3) ◽  
pp. 591-600 ◽  
Author(s):  
U. Aswathanarayana
Keyword(s):  
South India ◽  
Regional Metamorphism ◽  
Southern India ◽  
Eastern Ghats ◽  
Cuddapah Basin ◽  
Upper Limit

There are three Precambrian provinces in southern India — the Dharwars (metavolcanics, metasediments, charnockites and granites), the Eastern Ghats (metasediments, charnockites and granites), and the Cuddapahs (essentially flat-lying continental sediments disturbed at the margins) — with chronostratigraphic histories dovetailing into one another. The Dharwars bear the impress of three episodes (about 3000 m.y., 2600–2300 m.y., and about 2000 m.y.) of folding, metamorphism, and emplacement of granites, the second being the most important. The pelitic sediments deposited in the Eastern Ghats geosyncline during the post-Dharwar times (upper limit, 2600 m.y.) were later folded and metamorphosed about 1600 m.y. ago into garnet-sillimanite-graphite gneisses (khondalites). Important deposits of mica pegmatites developed during this episode. Charnockites and granites associated with the Eastern Ghats were emplaced 1520–1300 m.y. ago. The Eastern Ghats rocks were subsequently cross-folded and metamorphosed about 500 m.y. ago. The sedimentation in the Cuddapah Basin was initiated sometime after the Eastern Ghats orogeny (1600 m.y. ago) but before 1160 m.y. ago. The Cuddapahs were subjected to regional metamorphism about 500 m.y. ago.

scholarly journals Petrogenesis of Proterozoic Lamproites and Kimberlites from the Cuddapah Basin and Dharwar Craton, Southern India: a Reply

2005 ◽  
Vol 46 (6) ◽  
pp. 1081-1084 ◽  
Author(s):  
N. V. CHALAPATHI RAO ◽  
S. A. GIBSON ◽  
D. M. PYLE ◽  
A. P. DICKIN ◽  
J. DAY
Keyword(s):  
Dharwar Craton ◽  
Southern India ◽  
Cuddapah Basin

Carbonate platform development in a Paleoproterozoic extensional basin, Vempalle Formation, Cuddapah Basin, India

2014 ◽  
Vol 91 ◽  
pp. 263-279 ◽  
Author(s):  
Gopal Chakrabarti ◽  
Debasish Shome ◽  
Subhasish Kumar ◽  
George M. Stephens ◽  
Linda C. Kah
Keyword(s):  
Carbonate Platform ◽  
Cuddapah Basin ◽  
Extensional Basin ◽  
Platform Development ◽  
Vempalle Formation

Petrogenesis of an alkaline lamprophyre (camptonite) with ocean island basalt (OIB)-affinity at the NW margin of the Cuddapah basin, eastern Dharwar craton, southern India

2019 ◽  
Vol 196 (2) ◽  
pp. 149-177 ◽  
Author(s):  
Rohit Kumar Giri ◽  
Praveer Pankaj ◽  
N.V. Chalapathi Rao ◽  
Ramananda Chakrabarti ◽  
Dinesh Pandit
Keyword(s):  
Mantle Source ◽  
Dharwar Craton ◽  
Southern India ◽  
Striking Similarity ◽  
Cuddapah Basin ◽  
Eastern Dharwar Craton ◽  
Calc Alkaline ◽  
Western Margin ◽  
Ocean Island ◽  
Alkaline Lamprophyres

We report petrology and geochemistry (including Sr and Nd isotopes) of a fresh lamprophyre at Ankiraopalli area at the north-western margin of Paleo-Mesoproterozoic Cuddapah basin, eastern Dharwar craton, southern India. Ankiraopalli samples possess a typical lamprophyre porphyritic-panidiomorphic texture with phenocrysts of kaersutite and diopside set in a plagioclase dominant groundmass. Combined mineralogy and geochemistry classify it as alkaline lampro- phyre in general and camptonite in particular. Contrary to the calc-alkaline and/or shoshonitic orogenic nature portrayed by lamprophyres occurring towards the western margin of the Cuddapah basin, the Ankiraopalli samples display trace element composition revealing striking similarity with those of ocean island basalts, Italian alkaline lamprophyres and highlights an anorogenic character. However, the87 Sr/86 Srinitial (0.710316 to 0.720016) and εNdinitial (– 9.54 to – 9.61) of the Ankiraopalli lamprophyre show derivation from an 'enriched' mantle source showing long term enrichment of incompatible trace elements and contrast from those of (i) OIB, and (ii) nearby Mahbubnagar alkaline mafic dykes of OIB affinity. Combining results of this study and recent advances made, multiple mantle domains are identified in the Eastern Dharwar craton which generated distinct Mesoproterozoic lamprophyre varieties. These include (i) Domain I, involving sub-continental lithospheric mantle source essentially metasomatized by subduction-derived melts/fluids (represented by orogenic calcalkaline and/or shoshonitic lamprophyres at the Mudigubba, the Udiripikonda and the Kadiri); (ii) Domain II, comprising a mixed sub-continental lithospheric and asthenospheric source (represented by orogenic-anorogenic, alkaline to calc-alkaline transitional lamprophyres at the Korakkodu), and (iii) Domain III, representing a sub-continental lithospheric source with a dominant overprint of an asthenospheric (plume) component (represented by essentially alkaline lamprophyres at the Ankiraopalli). Our study highlights the varied mantle source heterogeneities and complexity of geodynamic processes involved in the Neoarchean-Paleo/Mesoproterozoic evolution of the Eastern Dharwar craton.

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