National Centre for Earth Science Studies

General Research Interests:

Awards & Honours:

• Lifetime Achievement Award from the Indian Society of Applied Geochemists (ISAG), 2022
• Shanti Swarup Bhatnagar Prize 2015
• PRL Award 2013
• National Geoscience Award, Ministry of Mines, Govt. of India, 2009
• M.S. Krishnan Medal, Indian Geophysical Union, 2009
• Young Scientist Medal, Indian National Science Academy (INSA), 2000
• Young Associate, Indian Academy of Sciences (IAS), Bangalore, 1999
• Best Ph.D. Thesis Award, PRL, Ahmedabad, India, 1998

Selected Publications:

• N. Awasthi and J.S. Ray, The Palaeogene record of Himalayan erosion in the Andaman Basin, Journal of Earth System Science 29, 15 doi:10.1007/s12040-019-1266-7, 2020.
• A. Chatterjee, J.S. Ray, A.D. Shukla and K. Pande, On the existence of a perennial river in the Harappan heartland, Scientific Reports 9, 17221,doi:10.1038/s41598-019-53489-4, 2019.
• B.G. George, J.S. Ray and others, Stratigraphy and geochemistry of the Balwan Limestone, Vindhyan Supergroup, India: Evidence for the Bitter Springs del13C anomaly Precambrian Research 313, 18-30, 2018.
• I. Gautam, J.S. Ray, and others: Role of fractionation correction in accurate determination of 142Nd/144Nd by TIMS: A case study of 1.48 Ga alkaline rocks from Khariar, India, Chemical Geology 466, 479-490, 2017.
• A. Chatterjee and J.S. Ray, Sources and depositional pathways of mid-Holocene sediments in the Great Rann of Kachchh, India: Implications for fluvial scenario during the Harappan Culture, Quaternary International 443, 177-187, 2017.
• J.S. Ray, K. Pande and R. Bhutani, 40Ar/39Ar geochronology of subaerial lava flows of Barren Island volcano and the deep crust beneath the Andaman Island Arc, Burma Microplate, Bulletin of Volcanology 77:57, 1-10, 2015.
• N. Awasthi, J.S. Ray and others, Provenance of the late quaternary sediments in the Andaman Sea: Implications for monsoon variability and ocean circulation, Geochemistry, Geophysics, Geosystems DOI: 10.1002/2014GC005462, 2014.
• J.S. Ray, Pande, K., Bhutani, R., and others, Age and geochemistry of the Newania dolomite carbonatites, India: implications for the source of primary carbonatite magma, Contributions to Mineralogy and Petrology 166,1613-1632, 2013.
• J.S. Ray, Kumar, A., and others, Origin of gases and water in mud volcanoes of Andaman accretionary prism: implications for fluid migration in forearcs, Chemical Geology 347, 102-113, 2013.
• J.S. Ray, Mahoney, J.J., and others, Chronology and geochemistry of lavas from the Nazca Ridge and Easter Seamount Chain: a ~30 Myr hotspot record, Journal of Petrology 53, 1417-1448, 2012.
• N. Awasthi, J.S. Ray, and others, Major ash eruptions of Barren Island Volcano (Andaman Sea) during the past 72 kyr: clues from a sediment core record, Bulletin of Volcanology 72, 1131-1136, 2010.
• J.S. Ray, Radiogenic isotopic ratio variations in carbonatites and associated alkaline silicate rocks: Role of crustal assimilation, Journal of Petrology 50, 1935-1954, 2009.
• H.C. Sheth, J.S. Ray, and others, Volcanology and eruptive styles of Barren Island: an active mafic stratovolcano in the Andaman Sea, NE Indian Ocean, Bulletin of Volcanology 71, 1021-1039, 2009.
• H.C. Sheth, J.S. Ray, and others, Geology and geochemistry of Pachmarhi dykes and sills,...central India: problems of dyke-sill flow correlations in the Deccan Traps, Contributions to Mineralogy and Petrology 158, 357-380, 2009.
• J.S. Ray, Shukla, A.D., and Dewangan, L.K., Carbon and oxygen isotopic compositions of Newania dolomite carbonatites, Rajasthan, India: implication for source of carbonatites, Mineralogy and Petrology DOI 10.1007/s00710-009-0073-2, 2009.
• J.S. Ray, Age of Vindhyan Supergroup: A review of recent findings, Journal of Earth System Science 115, 149-160, 2006.
• J.S. Ray, and R. Ramesh, Stable carbon and oxygen isotopic compositions of Indian carbonatites, International Geology Review 48, 17-45, 2006.
• J.S. Ray, S.K. Pattanayak and Kanchan Pande, Rapid emplacement of the Kerguelen plume-related Sylhet Traps, eastern India: Evidence from 40Ar-39Ar geochronology, Geophysical Research Letters 32, L10303, 2005.
• J.S. Ray, J. Veizer, and W.J. Davis, C, O, Sr and Pb isotope systematics of carbonate sequences of the Vindhyan Supergroup, India: age, correlations and implications for global events, Precambrian Research 121, 103-140, 2003.
• J.S. Ray, M.W. Martin, S. Bowring and J. Veizer, U-Pb geochronology and Sr isotope stratigraphy of the Vindhyan Supergroup, India, Geology 30, 131-134, 2002.
• J.S. Ray and R. Ramesh, Rayleigh stable isotopic fractionation from a multicomponent source, Geochimica et Cosmochimica Acta 64, 299-306, 2000.
• J.S. Ray, and R. Ramesh, Evolution of carbonatite complexes of Deccan flood basalt province, India: Stable carbon and oxygen isotopic constraints, Journal of Geophysical Research 104, 29, 471-29, 482, 1999.
• J.S. Ray, R. Ramesh and K. Pande, Carbon isotopes in Kerguelen-plume derived carbonatites: evidence for recycled inorganic Carbon, Earth and Planetary Science Letters 170, 205-214, 1999.
• J.S. Ray, and K. Pande, Carbonatite-alkaline magmatism associated with continental flood basalts at stratigraphic boundaries: cause for mass extinctions, Geophysical Research Letters 26, 1917-1920, 1999.
• J.S. Ray, Trace element and isotope evolution during concurrent assimilation, fractional crystallization and liquid immiscibility of a carbonated silicate magma, Geochimica et Cosmochimica Acta 62, 3301-3306, 1998.