Browsing by Author "Parthiban, G."
Now showing items 21-40 of 55
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Geochemistry of ferromanganese nodule-sediment pairs from central Indian Ocean Basin
Pattan, J.N.; Parthiban, G. (Elsevier, 2011)Fourteen ferromanganese nodule-sediment pairs from different sedimentary environments such as siliceous ooze (11), calcareous ooze (two) and red clay (one) from Central Indian Ocean Basin (CIOB) were analysed for major, ... -
Anthropogenic effects on sediment quality offshore southwestern Taiwan: Assessing the sediment core geochemical record
Selvaraj, K.; Parthiban, G.; Chen, C.T.A.; Lou, J.Y. (Elsevier, 2010)Slag material was dumped in two sites off southwestern Taiwan by the China Steel Corporation during 1984-1995. By geochemically analyzing four sediment cores, the impact of slag on the sediment chemistry is investigated. ... -
Relationship between chemical composition and magnetic susceptibility in sediment cores from Central Indian Ocean Basin
Pattan, J.N.; Parthiban, G.; Banakar, V.K.; Tomer, A.; Kulkarni, M. (Indian Academy of Sciences, 2008)Three sediment cores in a north–south transect (3 degrees N to 13 degrees S) from different sediment types of the Central Indian Ocean Basin (CIOB) are studied to understand the possible relationship between magnetic ... -
A note on geochemistry of surface sediments from Krishna-Godavari basin, East Coast of India
Pattan, J.N.; Parthiban, G.; PrakashBabu, C.; Khadge, N.H.; Paropkari, A.L.; Kodagali, V.N. (The Geological Society of India, 2008)A closely spaced 75 surface sediments drawn from ‘Gas Hydrate` Project taken up by National Institute of Oceanography on a regional scale from the Krishna-Godavari Basin (Latitude I5 degrees 35 minutes to 16 degrees 20 ... -
Early Pliocene paleoceanography of the Vityaz Fracture Zone (VFZ), Central Indian Ridge
Guptha, M.V.S.; Banerjee, R.; Mergulhao, L.P.; Banerjee, P.; Parthiban, G.; Tewari, M. (Geological Society of China, 2007)Planktic foraminifera from the calcareous substrate of a ferromanganese crust in the Vityaz Fracture Zone (VFZ), Central Indian Ridge were studied to reconstruct the early Pliocene paleoceanography of this region. Eleven ... -
Composition and origin of buried ferromanganese nodules from central Indian Ocean
Pattan, J.N.; Parthiban, G. (Geological Society of India, 2006)Five buried ferromanganese nodules were recovered at different depths of 167-169 cm (A), 172 174 cm (B), 228 230 cm (C), 328 330 cm (D) and 418 420 cm (E) in a 5 m sediment core from the siliceous sediment of Central Indian ... -
Evidence of Himalayan erosional event at approx. 0.5 Ma from a sediment core from the equatorial Indian Ocean in the vicinityof ODP Leg 116 sites
Nath, B.N.; Gupta, S.M.; Mislankar, P.G.; Rao, B.R.; Parthiban, G.; Roelandts, I.; Patil, S.K. (Elsevier, 2005)A sediment core collected from an area _100 miles south of the ODP Leg 116 (distal Bengal Fan) in the equatorial Indian Ocean was investigated for microfossils, mineralogy, mineral chemistry, magnetic susceptibility, grain ... -
Compositional variation and genesis of ferromanganese crusts of the Afanasiy-Nikitin Seamount, Equatorial Indian Ocean
Rajani, R.P.; Banakar, V.K.; Parthiban, G.; Mudholkar, A.V.; Chodankar, A.R. (Indian Academy of Sciences, 2005)Eight ferromanganese crusts (Fe-Mn crusts) with igneous and sedimentary substrates collected at different water depths from the Afanasiy-Nikitin Seamount are studied for their bulk major, minor and rare earth element ... -
Biological productivity, terrigenous influence and noncrustal elements supply to the Central Indian Ocean Basin: Paleoceanography during the past approx. 1 Ma
Pattan, J.N.; Masuzawa, T.; Borole, D.V.; Parthiban, G.; Jauhari, P.; Yamamoto, M. (Indian Academy of Sciences, 2005)A 2 m-long sediment core from the siliceous ooze domain in the Central Indian Ocean Basin (CIOB; 13 degrees 03'S: 74 degrees 44'E; water depth 5099 m) is studied for calcium carbonate, total organic carbon, total nitrogen, ... -
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 ... -
Buried nodules from the central Indian Ocean basin
Pattan, J.N.; Parthiban, G. (Regional Research laboratory, Bhubaneswar, 2005)The occurrence of buried nodules is rare compared to surface nodule abundance in the deep sea. Surface nodules are collected with freefall grab, vanveen /peterson grabs, dredges and sediment cores whereas buried nodules ... -
Alterations in geochemical associations in artificially disturbed deep-sea sediments
Nath, B.N.; Parthiban, G.; Banaulikar, S.; Sarkar, S. (Taylor and Francis, 2005)In view of the role of sediment geochemistry in regulating the benthic ecosystem, diagenetic remobilization of dissolved constituents, bottom water redox, and regeneration of benthic fluxes, surficial sediments in and ... -
Himalayan sedimentary pulses recorded by silicate detritus within a ferromanganese crust from the Central Indian Ocean
Banakar, V.K.; Galy, A.; Sukumaran, N.P.; Parthiban, G.; Volvaiker, A.Y. (Elsevier, 2003)A Central Indian Ocean deep-water seamount hydrogenous ferromanganese crust (SS663-Crust) contains variable (7-23%) amounts of detrital material (silicate-detritus). Taking into account the growth rate of the authigenic ... -
Lead ingots from a shipwreck off Poompuhar, Tamil Nadu, east coast of India: Evidence for overseas trade and their significance
Tripati, S.; Parthiban, G.; Vora, K.H.; Sundaresh; Bandodkar, S.N. (Blackwell Publishing, 2003)Various types of lead ingots have been reported from a number of shipwrecks from different parts of the world. In 1991 exploration of a wreck off Poompuhar, Tamil Nadu, east coast of India, at a depth of 19 m yielded a ... -
Productivity fluctuations in the southeastern Arabian Sea during the last 140 ka
Pattan, J.N.; Toshiyuki Masuzawab; Naidu, P.D.; Parthiban, G.; Mineko Yamamoto (Elsevier, 2003)Detailed analyses of multiple geochemical productivity proxies such as calcium carbonate, biogenic opal, biogenic Ba, organic carbon and total nitrogen have been carried out on a sediment core from the southeastern Arabian ... -
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 ... -
Origin of ash in the Central Indian Ocean Basin and its implication for the volume estimate of the 74,000 year BP Youngest Toba eruption
Pattan, J.N.; Pearce, N.J.G.; Banakar, V.K.; Parthiban, G. (Indian Academy of Sciences, 2002)A controversy exists about the origin of ash in the Central Indian Ocean Basin (CIOB). In situ silicic volcanism and Indonesian arc volcanism have been proposed as sources of ash in the basin. We present here the detailed ... -
Sediment redistribution during simulated benthic disturbance and its implications on deep seabed mining
Sharma, R.; Nath, B.N.; Parthiban, G.; Sankar, S.J. (Pergamon, 2001)A benthic disturbance experiment was conducted in the Central Indian Basin to evaluate the possible effects of sediment redistribution on marine ecosystem during deep-sea mining. The analyses of disturbance features on the ... -
An occurrence of approx. 74 ka Youngest Toba tephra from the western continental margin of India
Pattan, J.N.; Shane, P.; Pearce, N.J.G.; Banakar, V.K.; Parthiban, G. (Indian Academy of Sciences, 2001)A dispersed volcanic ash layer was recovered at ~6 300 cm depth in a 5.52 m long sediment core collected at a latitude 9~'21'E from a water depth of 2300 m on the Western Continental Margin of India (WCMI). Glass shards ... -
Oceanic ferromanganese deposits: Future resources and past-ocean recorders
Banakar, V.K.; Nair, R.R.; Parthiban, G.; Pattan, J.N. (Mineralogical Society of India, 2000)Oceanic ferromanganese deposits occur mainly in two forms, as nodules and as encrustations; while the nodules form a carpet on the deep-sea abyssal plains, encrustations occur as caps on seamounts. The genesis of nodules ...