Browsing by Author "Karisiddaiah, S.M."
Now showing items 21-40 of 43
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Mineralogy and chemistry of manganese nodules from the Southern part of Carlsberg Ridge
Karisiddaiah, S.M. (Geological Society of India, 1985)Petrographic study indicates that the nucleus of nodules is generally composed of clay, volcanic glass, basalt fragments, and earlier nodules. polished sections indicate typical collomorphic globular segregations and partly ... -
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 ... -
Morphology and petrography of pumice from the Central Indian Ocean Basin
Iyer, S.D.; Karisiddaiah, S.M. (CSIR-NISCAIR, 1988)Majority of pumice are equant with high Corey's shape factor values. Petrographic studies indicate flow bands of isotropic nature, with varied vesicle shape and size, and the diffractograms show them to be mainly composed ... -
Morphology of pockmarks along the western continental margin of India: Employing multibeam bathymetry and backscatter data
Dandapath, S.; Chakraborty, B.; Karisiddaiah, S.M.; Menezes, A.A.A.; Ranade, G.; Fernandes, W.A.; Naik, D.K.; PrudhviRaju, K.N. (Elsevier, 2010)This study addresses the morphology of pockmarks along the western continental margin of India using multibeam bathymetry and backscatter data. Here, for the first time we have utilized the application of ArcGIS (Geographical ... -
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 ... -
Multidisciplinary investigations exploring indicators of gas hydrate occurrence in the Krishna–Godavari Basin offshore, east coast of India
Ramana, M.V.; Ramprasad, T.; Paropkari, A.L.; Borole, D.V.; Rao, B.R.; Karisiddaiah, S.M.; Desa, M.; Kocherla, M.; Joao, H.M.; LokaBharathi, P.A.; DeSouza, M.J.B.D.; Pattan, J.N.; Khadge, N.H.; PrakashBabu, C.; Sathe, A.V.; Kumar, P.; Sethi, A.K. (Springer, 2009)Some main results of multidisciplinary investigations carried out within the framework of the Indian National Gas Hydrate Program in 2002–2003 in the Krishna–Godavari Basin offshore sector, east coast of India are reported, ... -
Multifractal detrended fluctuation analysis to compare coral bank and seafloor seepage area-related characterization along the central Western continental margin of India
Chakraborty, B.; VishnuVardhan, Y.; Haris, K.; Menezes, A.A.A.; Karisiddaiah, S.M.; Fernandes, W.A.; Kurian, J. (IEEE, 2016)In this letter, the characterization of two coral banks is initiated employing the multifractal detrended fluctuation analysis (MFDFA) for multibeam bathymetry and associated backscatter data. The seafloor roughness was ... -
Occurrence of pockmarks and gas seepages along the central western continental margin of India
Karisiddaiah, S.M.; Veerayya, M. (Indian Academy of Sciences, 2002)High-resolution seismic reflection profiling has revealed the occurrence of acoustic masking, pockmarks, gas seepages and plumes on the inner shelf, middle shelf and upper continental slope of western India, between 20 and ... -
Petrology of ocean floor rocks from Central Indian Ocean basin
Iyer, S.D.; Karisiddaiah, S.M. (NISCAIR, CSIR, 1990) -
Petrology of offshore basalts of Bombay harbour area, west coast of India
Karisiddaiah, S.M. (CSIR-NISCAIR, 1988)Recent marine geological and geophysical surveys indicate that the Deccan Traps extend to the offshore area of Bombay. Cores from bore holes in Deccan Traps collected from Bombay Harbour have been classified as basalts, ... -
Petrology of rift-related basalts at Bombay High waters, Arabian Sea
Karisiddaiah, S.M.; Iyer, S.D. (NISCAIR, New Delhi, 1991)Tholeiitic basalts obtained in 6 cores from Bombay High Region (Maharashtra, India), at depths of 860-2550 m below the seabed, are of low K and high Fe types. SiO sub(2) varies from 45.68 to 50.72%, K sub(2)O 0.09 to 0.69%, ... -
Pore-water sulfate concentration profiles of sediment cores from Krishna-Godavari and Goa basins, India
Mazumdar, A.; Paropkari, A.L.; Borole, D.V.; Rao, B.R.; Khadge, N.H.; Karisiddaiah, S.M.; Kocherla, M.; Joao, H.M. (The Geochemical Society of Japan, 2007)Several cores from Krishna-Godavari (Western Bay of Bengal) and Goa (India) (Eastern Arabian Sea) basins have been studied for pore water sulfate concentrations in order to understand and contrast the diagenetic processes. ... -
Post-lay survey of the Bombay High to Bombay submarine pipelines: A case study
Karisiddaiah, S.M.; Veerayya, M.; Wagle, B.G. (CWPRS, Pune, 1994) -
Potential distribution of subsurface methane in the sediments of the eastern Arabian Sea and its possible implications
Karisiddaiah, S.M.; Veerayya, M. (American Geophysical Union, 1996) -
Report: Fourth International Conference on Gas Hydrates, held at Yokohama, Japan, 19-23 May 2002
Karisiddaiah, S.M. (Geological Society of India, 2003) -
Sandwaves of the Gulf of Khambhat
Vora, K.H.; Gujar, A.R.; Karisiddaiah, S.M. (CSIR-NISCAIR, 1980)In the Gulf of Khambhat (Gujarat, India) the best formed sandwaves are seen in the west close to the Eastern Sand Bank. With increasing clay content and clay cover of the sea bed, the sandwaves become poorly formed. In the ... -
Scenario of gas-charged sediments and gas hydrates in the western continental margin of India
Karisiddaiah, S.M.; SubbaRaju, L.V. (Indian Geophysical Union, 2002)Echosounding, high-resolution shallow seismic data were collected along track lines spaced at 20 km interval across the western continental margin of India. A detailed analysis of the underway data revealed the occurrence ... -
Seismic and sequence stratigraphy of the central western continental margin of India: late-Quaternary evolution
Karisiddaiah, S.M.; Veerayya, M.; Vora, K.H. (Elsevier, 2002)Seismic and sequence stratigraphic architecture of the central western continental margin of India (between Coondapur and south of Mangalore) has been investigated with shallow seismic data. Seismic stratigraphic analysis ... -
Studies on the pore water sulfate, chloride and sedimentary methane to understand the sulfate reduction process in the eastern Arabian Sea
Karisiddaiah, S.M.; Borole, D.V.; Rao, B.R.; Paropkari, A.L.; Joao, H.M.; Kocherla, M.; Sarkar, G.P.; Biswas, G.; Kumar, N. (Indian Academy of Sciences, 2006)Sediment cores (~5 m length) from ten stations collected in the water depths of 2665-3210 m in the eastern Arabian Sea were studied for pore water sulfate (SO42-), chloride (Cl-) and lighter-hydrocarbons (methane: C1, ... -
Texture, carbonate content and component composition of Mauritius beach sands, Indian Ocean
Karisiddaiah, S.M.; Veerayya, M.; Guptha, M.V.S. (Tirunelveli: JCSONLINE, 1988)Samples collected from beaches bordering the southern, southeastern, western and northwestern shores representing swell (windward) and non-swell (leeward) dominated environments of the island of Mauritius were studied in ...