DRS at CSIR-National Institute of Oceanography: Recent submissions
Now showing items 6161-6180 of 9443
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Seasonal sea surface temperature contrast between the Holocene and last glacial period in the western Arabian Sea (Ocean Drilling Project Site 723A): Modulated by monsoon upwelling
(AGU, 2005)Annual, summer, and winter sea surface temperatures (SSTs) in the western Arabian Sea were reconstructed through the last 22 kyr using artificial neural networks (ANNs) based on quantitative analyses of planktic foraminifera. ... -
Stable nitrogen isotopic ratios of sinking particles and sediments from the northern Indian Ocean
(Elsevier, 2005)Delta sup(15)N values in modern sediments of the northern Indian Ocean range from less than 4 ppt in the northern Bay of Bengal to greater than 11 ppt in the central Arabian Sea due to the strong spatial variability of ... -
Changes in geotechnical properties of sediments from the Central Indian Basin induced by disturbance experiment
(Taylor and Francis, 2005)During the Indian Deep-sea Environment Experiment (INDEX) conducted in the Central Indian Basin to simulate nodule mining activity, the sediments were physically disturbed, lifted from the seafloor, and then redeposited ... -
Seasonal variations in heavy mineral placer sand from Kalbadevi Bay, Ratnagiri, Maharashtra
(Allied, India, 2005)Heavy mineral sand from Kalbadevi Bay, Ratnagiri, Maharashtra is well known for ilmenite placer deposits. Study along the central profile of the Bay shows that the sand is major constituent followed by silt, and clay content ... -
Radionuclide fluxes in the Arabian Sea: The role of particle composition
(Elsevier, 2005)The influence of the composition of the vertical particle flux on the removal of particle reactive natural radionuclides (sup(230)Th and sup(231)Pa) from the water column to the sediments is investigated. Radionuclide ... -
Changing sedimentary environment during the late Quaternary: Sedimentological and isotopic evidence from the distal Bengal Fan
(Elsevier, 2005)The sediments recovered from two gravity cores of the lower and distal Bengal Fan were investigated for sedimentological properties and Sr -Nd isotopes.Each core exhibits two distinct units, the lower unit 2 and upper unit ... -
Carbonate and carbon fluctuations in the Eastern Arabian Sea over 140 ka: Implications on productivity changes?
(Elsevier, 2005)Biological productivity in the western Arabian Sea was higher during interglacial than glacial times. In the eastern Arabian Sea productivity was higher during the glacials compared to interglacials, which is in sharp ... -
Enhanced export of carbon by salps during the northeast monsoon period in the northern Arabian Sea
(Elsevier, 2005)A drifting sediment trap was deployed and sup(234)Th activity in the water column was measured to calculate export flux of carbon at a time-series station in the northern Arabian Sea (lat. 21 degrees 30 minutes N; long. ... -
Heavy mineral distribution in the beaches of Nagapattinam District, Tamilnadu, India
(Allied, India, 2005)Heavy mineral studies were undertaken systematically along the coastal region from Poompuhar to Nagoor, Tamil Nadu, India. Heavy mineral studies by different size grades show a similar trend of concentration from +70 to ... -
Alterations in geochemical associations in artificially disturbed deep-sea sediments
(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 ... -
Palaeoceanographic implications of abundance and mean proloculus diameter of benthic foraminiferal species Epistominella exigua in sub-surface sediments from distal Bay of Bengal fan
(Indian Academy of Science, 2005)Temporal variation in abundance and mean proloculus diameter of the benthic foraminiferal species Epistominella exigua has been reconstructed over the last approx. 50,000 yr BP, from a core collected from the distal Bay ... -
Deep-sea impact experiments and their future requirements
(Taylor and Francis, 2005)In recent years, several experiments to assess the potential impacts due to deep-sea mining in the Pacific as well as the Indian Oceans have indicated the immediate changes and restoration patterns of environmental conditions ... -
A first look at past sea surface temperatures in the equatorial Indian Ocean from Mg/Ca in foraminifera
(AGU, 2005)Sea surface temperature (SST) for the central equatorial Indian Ocean, has been reconstructed over the last approx. 137 kyr, from Mg/Ca of the planktonic foraminiferal species Globigerinoides ruber. According to our record ... -
Pumices from the Central Indian Ocean Basin
(Regional Research laboratory, Bhubaneswar, 2005)A better understanding of submarine volcanisms that result in pyroclastics is of universal importance for paleotectonic reconstruction, crustal growth estimates and location of volcanisms throughout the earth's history. ... -
Rock magnetic records of the sediments of the eastern Arabian Sea: Evidence for the late Quaternary climatic change
(Elsevier, 2005)Rock-magnetic measurements along with grain size, acid-insoluble residue (AIR), organic carbon (OC), CaCO sub(3) and delta sup(18)O of the planktonic foraminifers of the sediments were determined for 15 gravity cores ... -
A foraminiferal testimony for the reduced adverse effects of mining in Zuari Estuary, Goa
(Taylor and Francis, 2005)This paper demonstrates the potentiality of foraminifera in detecting mining pollution. Goa's Mandovi-Zuari estuarine complex is most vulnerable to deterioration caused by the mining industry. The objective of the present ... -
Evidences for incipient hydrothermal event(s) in the Central Indian Basin: A review
(The Geological Society of China, 2005)The Central Indian Basin (CIB, 10 degrees-19 degrees S) encompasses morphotectonic features such as seamounts, abyssal hills, faults, fracture zones and lineations and basic to silicic volcanics that were derived from ... -
Mapping the floor
(CSIR, India, 2005) -
Grain size distribution and annual variation along the beaches from Poompuhar to Nagoor, Tamilnadu, India
(Allied, India, 2005)Systematic sedimentological investigations have been carried out along the central coast of Tamil nadu (India) for a stretch of 35 km from Poompuhar to Nagoore. Sediment samples had been collected in Dec. 2003, 2004 and ... -
First phase monitoring studies of simulated benthic disturbance delineating movement of fine particles in the Central Indian Basin
(Taylor and Francis, 2005)Benthic disturbance due to future deep-sea polymetallic nodule mining would involve extensive sediment plume generation and resedimentation on the sea floor. In order to evaluate the effects of resedimentation on benthic ...