Browsing Scholarly literature by Author "Ray, Dwijesh"
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A new report of serpentinites from Northern Central Indian Ridge (at 6 degrees S) - An implication for hydrothermal activity
Ray, Dwijesh; Banerjee, R.; Iyer, S.D.; Mukhopadhyay, S. (Geological Society of China, 2008)Abstract: Serpentinites from the inside corner high (6O38.5'SI 6S019.34'E) from the Northern Central Indian Ridge (NCIR) are comprised mainly of high Mg-rich lizardite and chrysotile pseudomorphs with varying morphologies. ... -
A petrogenetic model of basalts from the Northern Central Indian Ridge: 3-11°S
Ray, Dwijesh; Iyer, S.D.; Banerjee, R.; Misra, S.; Widdowson, M. (Geological Society of China, 2007)Mid-Ocean Ridge Basalts (MORB) from Northern Central Indian Ridge (NCIR) were recovered between latitudes 30 and 110S and are olivine tholeiite with higher abundances of K and Rb. They are of typical transitional MORB ... -
Contact programme on isotope geology and geochronology - Rb-Sr systematics
Das, I.C.; Krishna, K.V.S.S.; Praveen, K.R.; Ray, Dwijesh; Baiju, K.R.; Jena, J.K.; Goswami, T.K. (Geological Society of India, 2005) -
Evidences for seawater-rock hydrothermal interaction in the serpentinites from Northern Central Indian Ridge
Ray, Dwijesh; Banerjee, R.; Iyer, S.D.; Mukhopadhyay, S. (Current Science Association, 2009)Serpentinites and serpentinized harzburgites were collected from a ridge-transform intersection at 6 ddgrees 39 minutes S-68 degrees 19 minutes E from the Northern Central Indian Ridge. The degree of serpentinization is ... -
Geochemical implications of gabbro from the slow-spreading Northern Central Indian Ocean Ridge, Indian Ocean
Ray, Dwijesh; Misra, S.; Banerjee, R.; Weis, D. (Cambridge University Press, 2011)Gabbro samples (c. < 0.4 Ma old) dredged from close to the ‘Vityaz Megamullion’ on the slow-spreading Northern Central Indian Ridge (NCIR, 18-22 mm yr sup(-1)) include mostly olivine gabbro and Fe-Ti oxide gabbro. The ... -
Glass and mineral chemistry of northern central Indian ridge basalts: Compositional diversity and petrogenetic significance
Ray, Dwijesh; Banerjee, R.; Iyer, S.D.; Basavalingu, B.; Mukhopadhyay, S. (The Geological Society of China, 2009)The glass and mineral chemistry of basalts examined from the northern central Indian ridge (NCIR) provides an insight into magma genesis around the vicinity of two transform faults: Vityaz (VT) and Vema (VM). The studied ... -
Hydrothermal alteration studies of gabbros from northern central Indian ridge and their geodynamic implications
Ray, Dwijesh; Mevel, C.; Banerjee, R. (Indian Academy of Sciences, 2009)Mylonitic gabbro and altered gabbro were recovered from off-axis high and corner high locations at ridge-transform intersection, adjacent to Vityaz transform fault of the slow spreading (32-35 mm/yr, full spreading) Northern ... -
Metallogenesis along the Indian Ocean Ridge System
Banerjee, R.; Ray, Dwijesh (Indian Academy of Sciences, 2003)Twenty years after the discovery of the sea-floor hot springs, vast stretches of the global mid-ocean ridge system still remain unexplored for locating hydrothermal vents. In comparison to the mid-oceanic ridge systems of ... -
Mid-ocean ridges, InRidge and the future
Iyer, S.D.; Mukhopadhyay, R.; Drolia, R.K.; Ray, Dwijesh (Indian Academy of Sciences, 2003)In this article, we chronicle the events that lead to the creation of a global scientific network for midoceanic ridge research, identify areas where Indian researchers could participate and built a case to support and ... -
Mineral chemistry and alteration characteristics of spinel in serpentinised peridotites from the northern central Indian Ridge
Banerjee, R.; Ray, Dwijesh; Ishii, T. (Geological Society of India, 2015)Serpentinites (frequently cross cut by gabbroic dikelet), collected from Northern Central Indian Ridge (NCIR), Indian Ocean, contain both Cr-rich (Group I) and Cr-poor (Group II) variety of spinel. Based on mineralogy they ... -
Morphotectonic and petrological variations along the southern Central Indian Ridge
Mukhopadhyay, R.; Iyer, S.D.; Ray, Dwijesh; Karisiddaiah, S.M.; Drolia, R.K. (Springer, 2016)In order to ascertain the effect of geomorphic and tectonic domains on the formation, enrichment, and ascension of the ridge axis melt, structural and petrological data from a nearly 300-km-long axial stretch along the ... -
Preliminary results of a recent cruise to the Northern Central Indian Ridge
Drolia, R.K.; Iyer, S.D.; Chakraborty, B.; Kodagali, V.N.; Mukhopadhyay, R.; Nanyasi, S.K.; Sarma, K.V.L.N.S.; Rajasekhar, R.P.; Misra, S.; Ray, Dwijesh; Andrade, R.; Lasitha, S.; Varghese, J.; Jacob, J.; Sukumaran, N.P.; Pednekar, A.; Furtado, R.; Nair, A. (InterRidge, 2002) -
Structure, tectonic and petrology of mid-oceanic ridges and the Indian scenario
Iyer, S.D.; Ray, Dwijesh (Indian Academy of Sciences, 2003)We examine and synthesize the existing information about the structure, tectonic and petrology of the 70,000 km long mid-oceanic ridges and focus on similar studies made of the Carlsberg–Central Indian Ridges. The potential ... -
The Northern Central Indian Ridge: Geology and tectonics of fracture zones-dominated spreading ridge segments
Drolia, R.K.; Iyer, S.D.; Chakraborty, B.; Kodagali, V.N.; Ray, Dwijesh; Misra, S.; Andrade, R.; Sarma, K.V.L.N.S.; Rajasekhar, R.P.; Mukhopadhyay, R. (Indian Academy of Sciences, 2003)Multi-beam and single-beam bathymetric, gravity and magnetic data, across seven ridge segments (length varying between 37 and 84 km), offset by six transform discontinuities (ranging in dislocation length between 48 and ...