Clastic-volcaniclastic Rocks in Papaghni Sub-basin: Implications for Syn-sedimentary Felsic Volcanism during the Deposition of Paleoproterozoic Vempalle Carbonate Sequence, Cuddapah Basin, India

Based on detailed field, petrographic, mineral chemistry and geochemical studies, succinct details on the clastic - volcaniclastic sequence recorded within the dolomite horizon in Paleoproterozoic Vempalle Formation, Cuddapah basin, India are presented. The clastic rocks represented by rudaceous-are...

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Bibliographic Details
Published in:Journal of the Geological Society of India 2023-06, Vol.99 (6), p.747-757
Main Authors: Sesha Sai, V. V., Reddy, N. Ramakrishna, Tripathy, Vikash, Bhattacharjee, Santanu, Narahari, S. T., Krishna, K. Sai
Format: Article
Language:English
Subjects:
Apatite
Carbonates
Chemical composition
Chert
Conglomerates
Dolomite
Dolostone
Earth and Environmental Science
Earth Sciences
Feldspars
Geology
Horizon
Hydrogeology
Monazite
Original Article
Rock
Rocks
Rutile
Sequencing
Tuff
Volcanic activity
Volcanism
Zircon
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Summary:Based on detailed field, petrographic, mineral chemistry and geochemical studies, succinct details on the clastic - volcaniclastic sequence recorded within the dolomite horizon in Paleoproterozoic Vempalle Formation, Cuddapah basin, India are presented. The clastic rocks represented by rudaceous-arenaceous sequence and the volcaniclastic rock represented by an intervening tuffaceous horizon are noticed in the Vempalle dolomite near Tummalapalle area, in southwestern part of the Cuddapah basin. The conglomerate is matrix supported with dominantly chert clasts and the arenaceous unit is represented by fine grained quartz arenite. The tuffaceous unit is finely laminated exhibiting typical; clast matrix texture characteristic of fine grained pyroclastic rocks. Zircon, apatite, rutile and monazite are the accessory phases in the tuff. Geochemically, the felsic tuff is rhyolitic, peraluminous and shows relative enrichment of LREE. The chemical composition of the feldspar falls close to the K-feldspar end member in the Or-Ab-An plot. The clastic - volcaniclastic sequence in the Vempalle carbonate sequence indicate a localised break in carbonate precipitation accompanied by syn-sedimentary felsic volcanism during the evolution of Paleoproterozoic segment in the Cuddapah basin, India.
ISSN:0016-7622
0974-6889
DOI:10.1007/s12594-023-2381-2