DRS at CSIR-National Institute of Oceanography: Recent submissions
Now showing items 3731-3750 of 9371
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Geophysical study of a seamount located on the continental margin of India
(Springer, 1991)Bathymetric, magnetic, and gravity data obtained over a 2,464 m high seamount located in the Arabian Sea indicate that the seamount (inferred mean density = 2.65 gm/cc) extends for 1 km beneath the seafloor and is locally ... -
Genesis and growth of internal microstructures of manganese nodule
(NISCAIR, New Delhi, 1991)Microscopic and microprobe studies of manganese nodule from the Somali basin indicate that the reflectance of Fe-Mn oxyhydroxide varies with Mn and Fe concentrations. The non-oxyhydroxide components (detrital, biogenic ... -
Clay mineral distribution in the continental shelf sediments from Krishna to Ganges river mouth, east coast of India
(NISCAIR, New Delhi, 1991)Ninety six sediment samples (less than 2 mu m fractions) of the eastern continental shelf of India between Ganges in the north and Krishna in the south have been studiEd. by X-ray diffraction. On the basis of nature and ... -
Gravity anomalies and crustal structure of the western continental margin off Goa and Mulki, India
(Elsevier, 1991)Bathymetric and gravity data totalling 2000 line kilometres on the continental margin off Goa and Mulki, India, have been studied and prominent NNW-SSE and ENE-WSW trending free-air gravity anomalies varying between -60 + ... -
A model of basement structure from magnetic anomalies of the Bombay High oil-field west of India
(Elsevier, 1991)Bathymetric and magnetic data along 25 profiles covering the Bombay High and adjacent area on the mid-shelf and inner shelf off the Bombay Coast are studied. Except for the NW-SE and ENE-WSW trending anomaly closures in ... -
Reference datum level
(NIO, Goa, 1991) -
Delineation of structural lineaments from marine magnetic anomalies off Jonnalakonda, East Coast of India
(NISCAIR, New Delhi, 1991)Bathymetric and total magnetic intensity data off Jonnalakonda, south of Visakhapatnam, India have been collected. Magnetic anomaly contour map revealed that (1) the well developed magnetic anomaly occurring seaward side ... -
Environmental considerations of nodule mining in Central Indian basin
(Offshore Technology Conference, 1991)The status of benthic population and their physical and chemical environment in the CIB have been evaluated. The information on nodule populations and their association with benthic activity leads to prediction of potential ... -
Lithogenic fluxes to the deep Arabian Sea measurEd. by sediment traps
(Pergamon, 1991)Particle fluxes measured continuously for one year at three locations in the Arabian Sea using time-series sediment traps show that lithogenic sedimentation processes are strongly coupled to biological processes. The ... -
Enhanced particle fluxes in Bay of Bengal inducEd. by injection of freshwater
(Macmillan, 1991)The melting of ice sheets during deglaciation results in the injection of large amounts of fresh water into the oceans. To investigate how such injections might influence particle fluxes in the ocean, and hence the uptake ... -
Organic carbon in the sediments of Mandovi estuary, Goa
(NISCAIR, New Delhi, 1991)Total organic carbon (TOC) in surficial sediments in Mandovi Estuary, Goa, India varies widely from 0.1 to 3% (av. 1.05%). Highest values of TOC (2.4-3%) lie close to the mouth region and indicate no definite trend in its ... -
Petroleum hydrocarbon concentration in sediments along northern west coast of India
(NISCAIR, New Delhi, 1991)Gas chromatography revealed that nonpolar material extracted from surface sediments collected along the northern west coast of India was originated from petroleum hydrocarbon residue. Petroleum hydrocarbon levels as ... -
Contribution from coastal laterites to the nearshore placers of central west coast of India
(Museo Geologico di Bologna, 1991)The heavy mineral placers with variable concentrations of ilmenite and magnetite occur in the surface and in the sub-surface sediments of many bays along central west coast of India. These sediments are associated with ... -
Pleistocene events recrodEd. by shallow seismic profiling over the continental shelf off Krishna-Godavari Deltas
(Geological Society of India, 1991) -
Speciation of iron and manganese in the sediments of Mandovi Estuary
(CAS in Marine Biology, Parangipettai, 1991)Several attempts have been made to study the distribution of iron and manganese in Mandovi Estuary, Goa, India. But this is the first report of its kind on the speciation of these metals in sediments from Indian waters. ... -
Marine survey techniques: A prerequisite for exploratory fishing
(NIO, Goa, 1991)The topography of the sea floor is an essential tool for almost every exploration or exploitation program. Bathymetric charts are used for the measurement of topographic variation of the sea bed. The calibration by the ... -
Studies on coaxial circular array for underwater transducer applications
(Acoustical Society of America, 1991) -
Significance of relative velocity in drag force or drag power estimation for a tethered float
(NIO, Goa, 1991)There is difference in opinion regarding the use of relative velocity instead of particle velocity alone in the estimation of drag force or power. In the present study, a tethered spherical float which undergoes oscillatory ... -
Methods in mooring deep sea sediment traps
(NIO, Goa, 1991)The experience gained during the process of deployment and retrieval of nearly 39 sets of deep sea sediment trap moorings on various ships like FS Sonne, ORV Sagarkanya and DSV Nand Rachit are outlined. The various problems ...