Browsing Scholarly literature by Author "Ray, D."
Now showing items 1-20 of 34
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Acetylcholinesterase activities in marine snail (Cronia contracta) as a biomarker of neurotoxic contaminants along the Goa coast, West coast of India
Gaitonde, D.; Sarkar, A.; Kaisary, S.; DeSilva, C.; Dias, C.F.M.; Rao, P.V.S.S.D.P.; Ray, D.; Nagarajan, R.; DeSousa, S.N.; Sarkar, S.; Patill, D. (Springer, 2006)The measurement of acetylcholinesterase (AChE) activity is used worldwide as a biomarker of environmental contamination due to neurotoxic substances. In the present study the AChE activities was measured in marine snails ... -
Anomalous phase association of REE in ferromanganese crusts from Indian mid-oceanic ridges: Evidence for large scale dispersion of hydrothermal iron
SuryaPrakash, L.; Ray, D.; Nath, B.N.; Satyanarayanan, M.; KameshRaju, K.A.; Kurian, J.P.; DileepKumar, M.; Rao, A.S. (Elsevier B.V., 2020)Ferromanganese crusts collected at selected locations along the ~7000 km long stretch of Carlsberg, Central Indian and Southwest Indian ridges are studied for bulk geochemical composition and distribution of rare earths ... -
Assessing the source of oil deposited in the surface sediment of Mormugao Port, Goa - A case study of MV Qing incident
Suneel, V.; Saha, M.; Rathore, C.; Sequeira, J.; Mohan, P.M.N.; Ray, D.; Veerasingam, S.; Rao, V.T.; Vethamony, P. (2019)In June 2016, a cruise vessel was grounded in the Mormugao Port, resulting in unnoticed oil spill. The surface water and sediment samples were collected from the vicinity of the ship, and also an oil sample from the ship ... -
Astrobiological implications of dim light phototrophy in deep-sea red clays
Das, A.; Tanya S.; LokaBharathi, P.A.; Dhakephalkar, P.K.; Mallik, S.; Kshirsagar, P.R.; Khadge, N.H.; Nath, B.N.; Bhattacharya, S.; Dagar, A.K.; Kaur, P.; Ray, D.; Shukla, A.D.; Fernandes, C.E.G.; Fernandes, S.O.; Thomas, T.R.A.; Mamatha, S.S.; Mourya, B.S.; Meena, R.M. (Elsevier, 2017)Red clays of Central Indian Basin (CIB) under influence of trace of Rodriguez Triple Junction exhibited chemoautotrophy, low temperature hydrothermal alterations and photoautotrophic potential. Seamount flank TVBC-08, ... -
Benthic cycling of phosphorus in the Eastern Arabian Sea: Evidence of present day phosphogenesis
Linsy, P.; Nath, B.N.; Mascarenhas-Pereira, M.B.L.; Vinitha, P.V.; Ray, D.; PrakashBabu, C.; Rao, B.R.; Kazip, A.; Sebastian, T.; Kocherla, M.; Miriyala, P. (Elsevier, 2018)Results of a study on phosphorus (P) cycling in the Eastern Arabian Sea provides convincing evidence of present-day phosphogenesis in the study area. This finding contrasts with previous reports of the occurrence of only ... -
Disseminated sulphides in basalts from the northern central Indian ridge: Implications on late-stage hydrothermal activity
Banerjee, R.; Ray, D. (Springer, 2015)This study examined the mineralogy and mineral chemistry of disseminated sulphides (mainly chalcopyrite-pyrite) in partly altered basalts from the northern Central Indian Ridge, Indian Ocean in order to understand the role ... -
Distribution of Mercury in different abiotic and biotic sectors of the Mandovi-Zuari estuary (Goa)
Bhat, M.; Mesquita, A.; Ray, D.; Fernandes, B. (CSIR-NISCAIR, 2014)This study highlights the behaviour of Mercury in the abiotic and biotic segments of the Mandovi-Zuari estuarine system Spatia l, seasonal (Premonsoon and Postmonsoon) and tidal, distribution of THg in dissolved/particulate ... -
Distribution of REEs and yttrium among major geochemical phases of marine Fe–Mn-oxides: Comparative study between hydrogenous and hydrothermal deposits
SuryaPrakash, L.; Ray, D.; Paropkari, A.L.; Mudholkar, A.V.; Satyanarayanan, M.; Sreenivas, B.; Chandrasekharam, D.; Kota, D.; KameshRaju, K.A.; Kaisary, S.; Balaram, V.; Gurav, T. (Elsevier, 2012)Mineralogy and geochemistry of the ferromanganese oxides collected from two seamounts in the Andaman Sea have been investigated with special reference to the solid phase partitioning behavior of rare earth elements (REEs). ... -
Elevated turbidity and dissolved manganese in deep water column near 10�47�S Central Indian Ridge: studies on hydrothermal activities
Ray, D.; KameshRaju, K.A.; Rao, S.A.; SuryaPrakash, L.; Mudholkar, A.V.; Yatheesh, V.; Samudrala, K.; Kota, D. (Springer Science and Business Media Deutschland GmbH, 2020)The deep water in the ridge segment between 10°18'S and 10°57'S of northern Central Indian Ridge was surveyed with CTD and AUV for seafloor hydrothermal activities. During the survey, 25 CTD hydrocasts were made, and ... -
Fe and S-isotope compositions of hydrothermal deposits from Kings Triple Junction, Lau Basin, southwest Pacific Ocean
Ray, D.; Sreenivas, B.; SuryaPrakash, L.; Mazumdar, A.; Peketi, A.; Paropkari, A.L.; Balu, G. (Elsevier, 2021)We analyzed iron and sulfur isotopic compositions of polymetallic sulfides from an extinct hydrothermal mound near the Kings Triple Junction of the northern Lau basin belonging to a back-arc basin for understanding the ... -
First quantitative exploration of benthic megafaunal assemblages on the mid-oceanic ridge system of the Carlsberg Ridge, Indian Ocean
Sautya, S.; Ingole, B.; Jones, D.O.B.; Ray, D.; KameshRaju, K.A. (Cambridge University Press, 2017)There are few quantitative studies on deep-sea biodiversity from the Indian Ocean, particularly on the mid-ocean ridges (MOR). We investigated the benthic megafaunal community structure of the Indian Ocean MOR at the ... -
Formation of hydrothermal deposits at Kings Triple Junction, northern Lau back-arc basin, SW Pacific: The geochemical perspectives
Paropkari, A.L.; Ray, D.; Balaram, V.; Prakash, L.S.; Mirza, I.H.; Satyanarayana, M.; Rao, T.G.; Kaisary, S. (Elsevier, 2010)An inactive hydrothermal field was discovered near Kings Triple Junction (KTJ) in northern Lau back-arc basin during 19th cruise of R/V Akademik Mstislav Keldysh in 1990. The field consisted of a large elongated basal ... -
Geochemical variability of MORBs along slow to intermediate spreading Carlsberg-Central Indian Ridge, Indian Ocean
Ray, D.; Misra, S.; Banerjee, R. (Elsevier, 2013)ICP-MS trace element data from the Carlsberg Ridge MORBs from two different locations is presented. Using this data the intra-ridge geochemical variations of the Carlsberg Ridge - Central Indian Ridge MORBs is reassessed. ... -
Geochemical, mineralogical, and Sr-Nd isotopic compositions of ferromanganese encrustations from Central Indian Ridge at 06�38.5-S
Banerjee, R.; Devasia, G.K.; Ray, D.; Balakrishnan, S. (John Wiley & Sons, 2018)Mineralogical, geochemical, and isotopic (Sr and Nd) studies of 14 ferromanganese encrustations on basaltic substrates from Central Indian Ridge at 06�38.5-S indicate that except for two (NC3 and NC4), the samples are ... -
Hydrothermal plumes over the Carlsberg Ridge, Indian Ocean
Ray, D.; KameshRaju, K.A.; Baker, E.T.; Rao, A.S.; Mudholkar, A.V.; Lupton, J.E.; SuryaPrakash, L.; Gawas, R.B.; VijayaKumar, T. (American Geophysical Union, 2012)Water column surveys and sampling in 2007 and 2009 was conducted to search for hydrothermal plumes over a segment of the Carlsberg Ridge. An evidence for two separate vent fields, one near 3 degrees 42′N, 63 degrees 40′E ... -
Impacts of Zn and Cu enrichment under ocean acidification scenario on a phytoplankton community from tropical upwelling system
Sharma, D.; Biswas, H.; Silori, S.; Bandyopadhyay, D.; Shaik, A.urR.; Cardinal, D.; Mandeng-Yogo, M.; Ray, D. (2020)Increasing dissolution of CO2 in the surface ocean is rapidly decreasing its pH and changing carbon chemistry which is further affecting marine biota in several ways. Phytoplankton response studies under the combination ... -
Implications of Microbial Thiosulfate Utilization in Red Clay Sediments of the Central Indian Basin: The Martian Analogy
Singh, Tanya; Kshirsagar, P.R.; Das, A.; Yadav, K.; Mallik, S.; Mascarenhas-Pereira, M.B.L.; Thomas, T.R.A.; Mamatha, S.S.; LokaBharathi, P.A.; Khadge, N.H.; Nath, B.N.; Dhakephalkar, P.K.; Iyer, S.D.; Ray, D.; Valsangkar, A.B.; Garg, A.; PrakashBabu, C.; Waghole, R.J.; Waghmare, S.S.; Rajwade, J.M.; Paknikar, K.M. (John Wiley & Sons, 2019)Microbial thiosulfate utilization and S-disproportionation could be important mechanisms of sulfate-formations on Earth and Mars. Sulfates on Mars date back to late-Noachian to Hesperian period. In contrast, the large ... -
Megafaunal community structure of Andaman seamounts including the back-arc basin - A quantitative exploration from the Indian Ocean
Sautya, S.; Ingole, B.S.; Ray, D.; Stohr, S.; Samudrala, K.; KameshRaju, K.A.; Mudholkar, A.V. (Public Library of Science, 2011)Species rich benthic communities have been reported from some seamounts, predominantly from the Atlantic and Pacific Oceans, but the fauna and habitats on Indian Ocean seamounts are still poorly known. This study focuses ... -
Microbathymetry inferences from two AUV dives over a short segment of the Central Indian Ridge between 10�18' and 10�57'S, Indian Ocean
KameshRaju, K.A.; Yatheesh, V.; Rao, A.S.; SuryaPrakash, L.; Ray, D.; Mudholkar, A.; Samudrala, K.; Augustin, N.; Kurian, P.J. (Springer, 2023)The topographic fabric of the rift valley floor has been analyzed using the multibeam echosounder data obtained by the autonomous underwater vehicle (AUV) Abyss at two locations over a short segment of the slow-spreading ... -
Microtexture and distribution of minerals in hydrothermal Barite-Silica chimney from the Franklin seamount, SW Pacific: Constraints on mode of formation.
Ray, D.; Kota, D.; Das, P.; SuryaPrakash, L.; Khedekar, V.D.; Paropkari, A.L.; Mudholkar, A.V. (Geological Society, 2014)An extinct hydrothermal barite-silica chimney from the Franklin Seamount of the Woodlark Basin, in the southwestern Pacific Ocean, was investigated for mineral distribution and geochemical composition. Six layers on either ...