DRS at CSIR-National Institute of Oceanography: Recent submissions
Now showing items 4611-4630 of 9376
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Morphogenetic controls on the distribution of the littoral placers along central west coast of India
(M.S. University of Baroda, Vadodara, India, 1995)The total heavy mineral concentration along the central west coast of India varies from 0.17 to 98.54 percent. A zone of higher concentration is confined to the central protion of the coastal segment between 17 degrees 59' ... -
Distribution of major, trace and rare-earth elements in surface sediments of the Wharton Basin, Indian Ocean
(Elsevier, 1995)Bulk chemical analysed of eighteen surface sediments taken on an east-west transect (lat. 15 degrees 40'S) in the Wharton Basin, Indian Ocean, were analysed for major, trace and rare-earth elements (REE) by inductively ... -
Origin and significance of high-grade phosphorite in a sediment core from the continental slope off Goa, India
(Current Science Association, Bangalore, India, 1995)A phosphorite crust was found at 380-390 cm depth interval of a sediment core collected from the topographic high occurring on the continental slope off Goa. This crust is fragile and grey to light brown in colour. Carbonate ... -
Influence of bathymetry in manganese nodule pilot mine site selection: A case study from the Central Indian Basin
(Int. Soc. of Offshore and Polar-Eng.(ISOPE), Colorado, USA, 1995)Although manganese nodules are observed in all world oceans, known reserves cannot be only criterion in future mine sites selection and sizing. Detailed and accurate depth data is another major prerequisite. With the advent ... -
Marine magnetic studies over a lost wellhead in Palk Bay, Cauvery Basin, India
(Geological Society of India, 1995)Close grid marine magnetic surveys in the vicinity of a drill well site PH 9-1 in Palk Bay revealed that the area is characterized by smooth magnetic field except for a local anomaly caused by a lost wellhead. The smooth ... -
Transparent heavy mineral distribution in the Bays of Jaigad, Ambwah, and Varvada, Ratnagiri District, Maharashtra
(Indian Association of Sedimentology, 1995) -
Establishment of gravity stations and inference of crustal thickness around Mormugao Harbour and NIO
(Geological Society of India, 1995)Complete descriptions and basic facts of nine gravity stations of Marmugao Harbour, Goa, India are presented. They exhibit a maximum Bouguer difference of 2.12 mGal in an overall distance of about 2 km. Keeping in view the ... -
Supra-generic radiolarian transfer function based late Miocene palaeomonsoonal changes in the northeastern tropical Indian Ocean
(Indian Geological Association, 1995)A Q-mode factor analysis of the % data of 25 broadly defined supra-generic radiolarian groups in 42 deep-sea surface sediments produced four statistically significant and geographically distinct faunal assemblages related ... -
Geochemistry of calcareous sediments from the SW Carlsberg Ridge: Evidence for deeper carbonate compensation depth
(NISCAIR, CSIR, 1995)Concentration of Mn, Fe, Ni, Co, Zn, Ca, Mg, K, Al, Si, Ti, P and CaCO sub(3) show wide range for the calcareous sediments from SW Carlsberg Ridge (CR). Compared with the average pelagic clays, the CR sediments are enriched ... -
Marine sediments and palaeoclimatic variations since the Late Pleistocene: An overview for the Arabian Sea
(Geol. Soc. India, Bangalore, 1995)A large number of surfacial and sub-surface sediments from the Arabian Sea have been studied to enhance our understanding of palaeoclimatic variations over the Indian region. Bsically the surficial sediments have been ... -
Distributional pattern of benthic foraminiferal morpho-groups in the shelf region off Mangalore: Environmental implications
(NISCAIR, CSIR, 1995)The foraminiferal population in 45 surface sediment samples (20-86 m water depth) off Mangalore, Karnataka, India, was divided into benthic and planktonic assemblages. Within the benthic community based on the external ... -
The impact of selected sea level rise scenarios in the vicinity of Cochin harbour, India
(1995)The physical response of selected sea level rise scenarios on a stretch of barrier beach in the vicinity of Cochin harbour, India are investigated with a thrust on quantifying landward displacement of the land/water ... -
Petrology of seamounts in the Central Indian Ocean Basin: Evidence for near-axis origin
(Springer, 1995)Previous studies on the distribution and morphology of ancient seamount chains (>50 Ma) in the Central Indian Ocean basin (CIOB) indicated their generation from the fast spreading Southeast Indian Ridge. The petrology of ... -
Structure and tectonics of the southwestern continental margin of India
(Elsevier, 1995)A NNW-SSE-trending graben in the inner shelf (40-60 m isobaths), a mid-shelf basement ridge (60-150 m isobaths), a shelf-margin basin (150-1000 m isobaths) and the Prathap Ridge Complex in the slope (1000-2000 m isobaths) ... -
Holocene sea level fluctuations on western Indian continental margin: An update
(Geological Society of India, 1995)A new Holocene curve is generated for the western Indian continental margin. While constructing this curve careful selection of the dates were made by giving due considerations to the genetic characteristics of the dated ... -
Rare earth element studies of surficial sediments from the southwestern Carlsberg Ridge, Indian Ocean
(Indian Academy of Sciences, Bangalore, India, 1995)The rare earth element (REE) contents of sixteen surficial calcareous sediments from the southwestern Carlsberg Ridge, Indian Ocean, have been determined. The total REE vary from 35 ppm to 126 ppm and are inversely related ... -
Foraminiferal evidences for 77-year cycles of droughts in India and its possible modulation by the gleissberg solar cycle
(Coastal Research Foundation, 1995)A 1.15 m long core collected from 20 m water depth off Karwar on the western continental shelf of India was studied to reconstruct the paleomonsoonal, precipitational history during the recent past with fine time resolution ... -
Verdine and glaucony facies from surficial sediments of the eastern continental margin of India
(Elsevier, 1995)The present paper reports the first mineralogical description of green grains (verdine and glaucony) from sediments of the eastern continental margin of India. Only 24 of the 82 sediment samples studied, at depths between ... -
Basement structure beneath the innershelf off Mahabalipuram to Palar River, east coast of India
(NISCAIR, CSIR, 1995)Magnetic data along three coastal parallel profiles over the innershelf (30-50 m water depth) off Mahabalipuram recorded short wavelength and high amplitude (peak to peak of the order of 200-700 nT) anomalies. Two linear ... -
Arc arrays: studies of high resolution techniques for multibeam bathymetric applications
(Elsevier, 1995)In this paper a theoretical study is initiated to observe the utility of directional spectral estimation techniques for `arc array' geometries. We examine the suitability of a 15 degrees arc transducer geometry for multibeam ...