Browsing Institute's contributions by Author "Valsangkar, A.B."
Now showing items 21-40 of 52
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Impacts on surface productivity during sediment dispersal experiment in Central Indian Basin
LokaBharathi, P.A.; Nath, B.N.; Ingole, B.S.; Parthiban, G.; Matondkar, S.G.P.; Raghukumar, C.; Khadge, N.H.; Valsangkar, A.B.; Suryanarayana, A.; Jaisankar, S.; Sharma, R. (Taylor and Francis, 2005)It is anticipated that in the case of mining of marine minerals, sea floor sediments will be brought up along with the mineral ores and discharged on the surface. These nutrient rich sediments would create a set of different ... -
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 ... -
Implications of post-disturbance studies on the grain size of the sediments from the Central Indian Basin
Valsangkar, A.B. (Indian Academy of Sciences, 2001)Indian Deep-Sea Environment Experiment (INDEX) was conducted by simulating benthic disturbance and resuspension of the sediments in 3 km ´ 200 m narrow strip at 5300 m water depth in the Central Indian Basin (CIB). Using ... -
Magnetic properties of polymetallic nodules from the Central Indian Ocean Basin
Valsangkar, A.B. (Bangalore: Geological Society of India, 1994) -
Manpower
Valsangkar, A.B.; Nath, B.N.; Sharma, R. (New Delhi: Department of Ocean Development, 1988)The recruitment, training and deployment of manpower for scientific work during an oceanographic expedition is discussed. Fifty scientists and 50 technicians in various disciplines of oceanography were recruited. A training ... -
Mineral resources
Valsangkar, A.B. (Oxford and IBH, New Delhi, 2001)Marine minerals have been center of attraction to mankind since ancient times. The technological advances in the recent years show that the retrieval of underwater minerals from deep-sea can no longer be a dream. Marine ... -
Mineral resources of the Indian Ocean and related scientific research
Siddiquie, H.N.; Gujar, A.R.; Hashimi, N.H.; Valsangkar, A.B.; Nath, B.N. (1985)The Indian Ocean (area: 74.917 x 106 km2, water volume: 291.945 x 106 km3, average depth: 3897 m) is the third largest of the world oceans. The lands bordering the ocean contain almost 40 percent of the world's population ... -
Monitoring effects of simulated disturbance at INDEX site: Current status and future activities
Sharma, R.; Nath, B.N.; Valsangkar, A.B.; Khadge, N.H.; Parthiban, G.; Sankar, S.J.; Ansari, Z.A.; Ingole, B.S.; Raghukumar, C.; LokaBharathi, P.A.; Matondkar, S.G.P.; RameshBabu, V.; Murty, V.S.N.; Babu, M.T.; Sardar, A.A. (International Society of Offshore and Polar Engineers, 2003)During the Indian Deep-Sea Environment Experiment (INDEX), greater than 6000 cu.m of sediment was resuspended 5 m above seafloor. Data collected from deep-towed photography, sediment traps, sediment coring and CTD operations ... -
Monitoring the sedimentary carbon in an artificially disturbed deep-sea sedimentary environment
Nath, B.N.; Khadge, N.H.; Nabar, S.; Raghukumar, C.; Ingole, B.S.; Valsangkar, A.B.; Sharma, R.; Srinivas, K. (Springer, 2012)An area of 0.6 km sup(2) in the manganese nodule field of the Central Indian Basin was physically disturbed and sediments discharged in the near bottom waters to simulate seabed mining and study its impact on benthic ... -
Monsoonal effects on beach and offshore sediments from kalbadevi bay, Ratnagiri, Maharashtra state, India.
Valsangkar, A.B.; Farnnades, D. (DAV publisher, 2014)Sediment samples representing the beach and offshore area of Kalbadevi Bay, Ratnagiri, Maharashtra were studied for different seasons along three east-west beach profiles (BP-01, BP-02 and BP-03) which covered berm, dune, ... -
Morphological and interlayer geochemical studies on manganese nodules from the southwestern Carlsberg ridge
Valsangkar, A.B.; Rajamanickam, G.V.; Karisiddaiah, S.M.; Siddiquie, H.N. (Elsevier, 1988)Mixed facies of manganese nodules from the southwestern Carlberg Ridge have been analysed for Mn, Fe, Ni, Cu, Co and Zn. Seventy one analyses including the averages presented for outer layer, inner layer and near-core ... -
Nodules size: An important factor in nodule mining?
Valsangkar, A.B. (Int. Soc. of Offshore and Polar-Eng.(ISOPE), Colorado, USA, 1995)A study of about 850 different sized nodules from 234 sites in the Central Indian Basin (CIB) showed a clear inverse relationship between size and grade of nodules. Among the different sized nodules, only the small (less ... -
Ploymetallic nodule resources in the central Indian Ocean
Valsangkar, A.B. (National Inst. of Oceanography (CSIR); India, 2009) -
Potential diagenetic and detrital sources for calcareous sediments from the Carlsberg Ridge, Indian Ocean
Valsangkar, A.B.; Borole, D.V.; Shejwalkar, A.S.; Kalangutkar, N.G.; Fernandes, N.O.; Dias, C.C. (Current Science Association, 2009)Six sediment cores from the Carlsberg Ridge (CR) were studied for elemental concentration, magnetic susceptibility (chi), grain size and clay mineral distribution, and sedimentation rate to decipher possible detrital and ... -
Pre- and post-monsoonal changes in grain size and heavy minerals in the sediments from Kalbadevi Bay, Ratnagiri, west coast of India
Valsangkar, A.B.; Fernandes, D. (NISCAIR (CSIR), 2011)Sediments from the Kalbadevi Bay, Ratnagiri collected during January, May and October have been studied for processes responsible for the observed grain size variations and heavy mineral distribution. The study shows ... -
Regional variability in occurrence and distribution of polymetallic nodules in the central Indian Basin
Valsangkar, A.B.; Rebello, J.M.S. (Taylor and Francis, 2016)Regional scale morphological studies on different-sized polymetallic nodules from the Central Indian Basin show that only 2–5 cm sized nodules have highest occurrence per station (92–94% along latitudes; 88–94% along ... -
Relationship between size and geochemistry of polymetallic nodules from the Central Indian Ocean Basin: Significance in selection of high grade nodules
Valsangkar, A.B.; Ambre, N.V. (Publ. and Inf. Dir., New Delhi, India, 1994)Morphological, mineralogical and geochemical studies on nodules of different sizes collected from the Central Indian Ocean Basin (CIOB) show two suits of nodule formation by oxic diagenetic and hydrogenous process resulting ... -
Relationship of sediment-biochemistry, bacterial morphology, and activity to geotechnical properties in the central Indian Basin
Naik, S.S.; Khadge, N.H.; Valsangkar, A.B.; Das, A.; Fernandes, C.E.G.; LokaBharathi, P.A. (Taylor & Francis, 2016)Distribution of biochemical properties, morphological and functional characteristics of bacteria in the extreme sedimentary environment of the Central Indian Basin (CIB) was examined in relation to geotechnical properties ... -
Role of sediment particles in mining of polymetallic nodules in the Central Indian Ocean
Valsangkar, A.B. (Hindi Vigyan Sahitya Parishad. Mumbai, 2001) -
Seafloor and sediment characteristics in INDEX AREA
Sharma, R.; Nath, B.N.; Valsangkar, A.B.; Khadge, N.H.; Gupta, S.M.; Parthiban, G. (Metal Mining Agency of Japan, 1997)Seafloor surveys and sediment sampling during the INDEX (Indian Deep-Sea Environmental Experiment) studies in the Central Indian Basin, resulted in identification of Test and Reference Areas, as well of establishment of ...