DRS at CSIR-National Institute of Oceanography: Recent submissions
Now showing items 5801-5820 of 9443
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Position fixing and surveying techniques for marine archaeological studies
(National Institute of Oceanography, India, 2003)This technical report comprises of two major aspects: (1) Surface positioning and (2) Sub-surface Positioning, which are followed for obtaining geographical positions while carrying out marine archaeological studies. Also, ... -
Trace metal levels in nearshore sediments close to industrial discharges off Cuddalore (Bay of Bengal)
(ASTM International, 2003)Trace metals in the sediment and in the overlying water column along with texture characteristics in the vicinity of industrial discharges at Cuddallore were analyzed, covering the seasonal changes to identify probable ... -
Multipeakedness and groupiness of shallow water waves along Indian coast
(Coastal Education and Reserch Foundation, 2003)Based on one year wave data collected at 4 locations along the Indian coast, the frequency of occurrence of double-peaked spectra was estimated. It was found that 40% of the data analysed was single-peaked. The double ... -
Orbital frequencies in radiolarian assemblages of the central Indian Ocean: implications on the Indian summer monsoon
(Elsevier, 2003)Radiolarian distribution in surface sediments and its relationships with overlying surface oceanography provided impetus for down-core faunal variation related to changes in monsoon intensity due to the Earth's orbital ... -
Environmental studies for deep seabed mining
(Discovery Publishing House, 2003)Minerals from the deep-sea are potential sources of metals such as Cu, Ni, Co, Mn, Fe, that could be mined in future by developing suitable technologies for mining as well as extracting metals from them. Several groups of ... -
Potential impact on climate of the exploitation of methane hydrate deposits offshore
(Elsevier, 2003)Considerable attention has focussed on methane hydrates as a potential energy resource but much less on the potential environmental problems of exploiting these deposits. In fact, methane hydrate deposits represent a dynamic ... -
Methane hydrate in marine sediments: New alternative for natural energy
(National Institute of Oceanography, India, 2003) -
Geochemistry of ferromanganese micronodules and associated Mn and trace metals diagenesis at high terrigenous depositional site of middle fan region, Bay of Bengal
(Elsevier, 2003)The influence of sedimentation on the morphology, growth and geochemistry of the micronodules, and on Mn enrichment in the sediments of the Bay of Bengal has been evaluated. Mn accumulation is 307-219 mg cm u2 kyr u-1 in ... -
Impact microcrater morphology on Australian microtektites
(Meteoritical Society, 2003)Scanning electron microscopy of 137 Australian microtekties and fragments from 4 sediments cores in the Central Indian Ocean reveals more than 2000 impact-generated features in the size range of 0.3 to 600 mu m. Three ... -
Microbial dolomite crusts from the carbonate platform off western India
(International Association of Sedimentologists, 2003)The occurrence of Late Pleistocene dolomite crusts that occur at 64 m depth on the carbonate platform off western India is documented. Dolomite is the most predominant mineral in the crusts. In thin section, the crust ... -
Sediment transport and depth variation study of the Gulf of Kutch using remote sensing
(Taylor and Francis, 2003)Ocean Colour Monitor (OCM) data gathered onboard Indian Remote Sensing satellite (IRS P4), in eight VNIR bonds covering Gulf of Kutch and adjoining regions were digitally processed using an image processing system. False ... -
Longshore sediment transport rate-measurement and estimation, central west coast of India
(Elsevier, 2003)Measurements of the longshore sediment transport rate (LSTR) along the surf zone at a 4-km-long beach on the central west coast of India were made over a 4-month period. During the study, both the lateral and vertical ... -
Carbon and oxygen isotope time series records of planktonic and benthic foraminifera from the Arabian Sea: Implications on upwelling processes
(Elsevier, 2003)Oxygen and carbon isotopic analyses have been performed on the tests of Globigerina bulloides and Pulleniatina obliquiloculata (planktonic foraminifera) and Uvigerina excellens (benthic foraminifer) to study the evolution ... -
Quantitative seafloor characterization using angular backscatter data of the multi-beam echo-sounding system - Use of models and model free techniques
(Allied, India, 2003)For quantitative seafloor roughness characterization and classification using multi-beam processed backscatter data, a good correlation is indicated among the power law parameters (composite roughness model) and hybrid ANN ... -
Himalayan sedimentary pulses recorded by silicate detritus within a ferromanganese crust from the Central Indian Ocean
(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 ... -
Hydrothermal petroleum in the sediments of the Andaman Backarc Basin, Indian Ocean
(Elsevier, 2003)Recent sediments of he Andaman Backarc Basin, Indian Ocean, between the Andaman Nicobar islands and the Malay Peninsula have been analyzed for biomarker lipids. Three cores were selected: one each from the fault zone in a ... -
Sea-floor classification using multibeam echo-sounding angular backscatter data: A real-time approach employing hybrid neural network architecture
(IEEE, 2003)The presently studied numerical model, e.g., composite roughness, is successful for the purpose of sea-floor classification employing processed multibeam angular backscatter data from manganese-nodule-bearing locations of ... -
Significance of relic carbonate deposits along the central and southwestern margin of India for late Quaternary environmental and sea level changes
(Elsevier, 2003)Environmental and sea level indicators were investigated using dredge samples from late Quaternary carbonate deposits along the shelf break between Goa and Cape Comorin, India. Geomorphic features in the area were identified ... -
Deep-sea polymetallic nodule mining: Challenges ahead for technologists and environmentalists
(Taylor and Francis, 2003)Although, offshore mining for mineral wealth is not required at present, it may be the only alternative in the future due to the continuous growing demand for certain metals that have no or limited land deposits. Risk ... -
Two layers of Australian impact ejecta in the Indian Ocean
(Meteoritical Society, 2003)Only 2 Australian tektites have been found in the Indian Ocean, and both are associated with surficial sediments. Cores from both locations are collected, where the tektites have been reported. The microtektites in these ...