Barite deposit within the upper carbonaceous tuff zone of Pullampet formation of the middle Proterozoic Cuddapah Supergroup.
One of the world's largest baryte deposits, accounting for more than 98% of India's baryte production.
K.S. Misra of the Geological Survey of India (GSI) was the first to report fullerene-bearing shungitic rocks from the volcano-sedimentary Proterozoic formations in association with the world's largest bedded barite (barytes) deposit at Mangampeta, Kadapa (Cuddapah) district, India in the 3rd International seminar & exhibition on exploration geophysics in Osmania University, Hyderabad on 9th November 2006.
Both C60 and C70 forms of fullerene were identified by laser desorption/ionization spectrometry in black carbonaceous shales (now called shungitic rocks) having an organic carbon content of 5-13%. The associated rocks include grey shales, dolomites and quartzites. (Dr. R. Jagadiswara Rao; Professor of Geology [Retired], Sri Venkateswara University, Tirupati, AP 517502, India)
References
- Clark, S.H.B., Poole, F.G., and Zhongcheng Wang (2004): Comparison of some sediment-hosted, stratiform barite deposits in China, the United States, and India. Ore Geology Reviews 24, 85-101.
- Sama Suresh, Nirugatti Dinakar, T. N. V. K. V. Prasad, P. C. Nagajyothi, Thoti Damodharam and Arveti Nagaraju (2007): Effects of a Barite Mine on Ground Water Quality in Andhra Pradesh, India. Mine Water and the Environment 26, 119-123.
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