DRS at CSIR-National Institute of Oceanography: Recent submissions
Now showing items 4931-4950 of 9376
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Controls on organic carbon distribution in sediments from the eastern Arabian Sea margin
(Springer, 1997)Sediment cores from the upper continental slope of the eastern Arabian Sea have high organic carbon (OC), CaCO sub(3), and sand content at the top. The values decrease with increasing depth in the Holocene and Upper ... -
Hydrovolcanic activity in the Central Indian Ocean Basin. Does nature mimic laboratory experiments?
(Elsevier, 1997)Classical works in the 1960's on spherules (volcanic, extraterrestrial, cosmic etc.) were carried out in order to distinguish these morphological and compositionally so as to understand their genesis yet, in some cases ... -
Lithological and mineralogical changes observed in a core from the western Bay of Bengal
(Allied, New Delhi (India), 1997)Lithological and mineralogical studies were carried out on sediments from a 650 cm long core from the north western Bay of Bengal at a depth of 2700 m. These studies demarcate a boundary at 380 cm designated as unit 1 from ... -
Record of the Cretaceous magnetic quiet zone: A precursor to the understanding of evolutionary history of the Bay of Bengal
(Current Science Association, Bangalore, 1997)Magnetic study along a transect joining the sites of Ocean Drilling Programme (OPD) keg 116 (1 degrees S, 81 degrees 24'E) and the vicinity of Deep Sea Drilling Project (DSDP) site 218 (7 degrees N, 87 degrees 30'E) revealed ... -
Spreading rate dependent seafloor deformation in response to India-Eurasia collision: results of a hydrosweep survey in the Central Indian Ocean basin
(Elsevier, 1997)The nature of magnetic anomalies and associated ridge-parallel structural lineaments and topographic complexities from an area bounded by latitudes 9 degrees 45'S and 14 degrees 45'S in the Central Indian Ocean Basin (CIOB) ... -
Curstal evolution and sedimentation history of the Bay of Bengal since the cretaceous
(American Geophysical Union, 1997)Multichannel seismic reflection, gravity, magnetic, and bathymetric investigations were made along five latitudinal profiles from the eastern shelf of India of the Andaman shelf and four NW-SE profiles in the Western Basin ... -
Physical properties of a long sediment core from the central Indian Basin
(Geological Survey and Mines Bureau, Dehiwala, Sri Lanka, 1997)In a 7.5 m-long box core, collected at 9 degrees S and 77 degrees E from 5400 m water depth from the Central Indian Basin, geotechnical properties clearly reflect the Plio-Pleistocene boundary. It is marked by a drastic ... -
Diagenetic remobilization of rare earth elements in a sediment core from the central Indian Basin
(NISCAIR, CSIR, 1997)Rare earth elements (REE) distribution in a 36 cm long sediment box core from the Central Indian Basin is studied. REE concentration is generally higher in the upper oxic zone than in intermediate suboxic zone suggesting ... -
Seasonal changes in suspended particulate component in Bombay High oil field (Arabian Sea)
(NISCAIR, CSIR, 1997)Investigation on the influence of seasonal changes in physico-chemical factors on particulate matter in the "Bombay High" region from February'85 to January'86 suggests that dominance of physical factors in monsoon largely ... -
Geomorphology and surficial geology of the western continental shelf and slope of India: A review
(Current Science Association, Bangalore, 1997)Coastal geology and geomorphology of the area and nearshore currents played a significant role in the distribution of placer minerals off Kerala and Maharashtra. Transport and sedeimentation of fine-grained materials at ... -
Shallow stratigraphy and gas-charged sediments in the inner shelf off Redi, west coast of India
(Cent. for Earth Sci. Stud., Cochin (India), 1997)Bathymetric, side scan sonar and seismic studies were conducted in shallow waters of 11-18 m off Redi along central west coast of India to understand the stratigraphy and structural features. Bathymetric contours suggest ... -
Mapping of sea bottom topography over western offshore, India using TOPEX/ERS-1 altimeter data
(Elsevier, 1997)As bathymetry and geoid are highly correlated in the 50-300 km range, the satellite-derived geoid can be used in the mapping of bathymetry. An attempt has been made to assess the accuracy of predicting sea bottom ... -
Seafloor and sediment characteristics in INDEX AREA
(Metal Mining Agency of Japan, 1997)Seafloor surveys and sediment sampling during the INDEX (Indian Deep-Sea Environmental Experiment) studies in the Central Indian Basin, resulted in identification of Test and Reference Areas, as well of establishment of ... -
Evidence for recent hydrothermal activity in the Central Indian Basin
(Pergamon, 1997)This study documents the first actual prof of recent intraplate volcanic-hydrothermal activity in the Central Indian Basin (CIB). Twenty-six surface sediments and a spade core (37 cm long) from the CIB were examined for ... -
Dune associated calcretes, Rhizoliths and Paleosols from the western continental shelf of India
(Geological Society of India, 1997)The calcareous deposits on the western continental shelf of India, off Bhatkal (water depths 50 to 58 m) occur as crusts, sheets, cylinders and reddish brown mudstones. The outer layers of the crusts are micrite-dominated ... -
Magnetic expression of some major lineaments and cretaceous quiet zone in the Bay of Bengal
(Springer, 1997)Magnetic data over the eastern continental margin of India and adjacent Bengal fan demarcate two major lineaments. A high amplitude N - S trending lineation of the Cauvery offshore Basin corresponds to the offshore fragment ... -
Late Quaternary paleoceanographic features as deduced from calcium carbonate and faunal changes of planktonic foraminifers in core samples from northeastern Arabian Sea
(Marine Biological Association of India, 1997)Two pelagic core samples, ARB-52 and ARB-54 from 2240 m and 800 m depths respectively from the Arabian Sea off Bombay were analysed for determining climatic changes during the past 30,000 yr. based on the interpretation ... -
Structure and origin of the 85 degrees E ridge
(American Geophysical Union, 1997)The submerged 85 degrees E Ridge in the Bay of Bengal trends approximately N-S between 19 degrees N and 6 degrees N latitudes. Off the southeast coast of Sri Lanka it takes an arcuate shape and seems to terminate with the ... -
Palaeoceanographic conditions during the formation of ferromanganese crust from the Afanasiy Nikitin seamount, north central Indian Ocean: geochemical evidence
(Elsevier, 1997)A ferromanganese crust dredged from the summit of the Afanasiy-Nikitin seamount in the composed of fresh-water phreatic calcite cement, Terebratulinae casts, rounded and ferruginised basalt clasts and weathered coralline ... -
Chlorine isotopic geochemistry of salt lakes in the Qaidam Basin, China
(Elsevier, 1997)The isotopic compositions of chlorine in salt lake brine coexisting with halite, oil-field water and river water from the Qaidam Basin (Qinghai, China) have been examined using high-precision measurement of chlorine isotopes ...