DRS at CSIR-National Institute of Oceanography: Recent submissions
Now showing items 3971-3990 of 9513
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Detailed bathymetric surveys in the central Indian Basin
(International Hydrographic Bureau, France, 1992)Over 420,000 line kilometers of echo-sounding data was collected in the Central Indian Basin. This data was digitized, merged with navigation data and a detailed bathymetric map of the Basin was prepared. The Basin can be ... -
Tectonic development of Graben over the Astrid ridge off Dronning Maud Land, Antarctica
(Scientific Publishing Company, Tokyo, 1992) -
Marine magnetic studies in the northern Bay of Bengal, preliminary results
(Oxford and IBH, New Delhi, 1992)The bathymetric and total magnetic intensity data collected along six E-W tracks were analysed and presented as stacked anomaly profiles. A first order basement configuration model was generated across the Bay of Bengal. ... -
A mid-Holocene strandline deposit on the inner shelf of Cochin, West coast of India
(Geological Society of India, 1992) -
Laminae and grain-size measures in beach sediments, east coast beaches, India
(Coastal Research Foundation, 1992)The studies of size parameters in 1.8 mm slices in 36 4-cm long cores from different physiographic units of 4 beaches along the east coast of India, having beach states from "reflective" to "dissipative", suggest significant ... -
Evidence for change in depositional environment in the Arabian Sea
(Oxford and IBH, New Delhi, 1992)Sediments of late Pleistocene and Holocene periods, from a 12 m long core collected at a depth of 3627 m from the Arabian Sea, have been studied in order to understand the depositional environment. Sub-samples selected at ... -
Heavy mineral occurrence off Hazira, west coast of India
(Indian Society of Earth Sciences, Calcutta, 1992)The occurrence of heavy mineral placers on the west coast of India are well known from Konkan and Malabar Coast. However, a geological and geophysical investigation (including echosounding and side scan sonar profiles and ... -
Geological factors associated with megabenthic activity in the Central Indian Ocean Basin
(Pergamon, 1992)Observations from more than 1000 seabed photographs show: a high frequency of occurrence (85-100%) of organisms and their lebensspuren in sediment-covered areas; a fairly close association (43-75%) with the nodules, with ... -
Late Quaternary sedimentation in eastern Bay of Bengal
(Oxford and IBH, New Delhi, 1992)This study presents variations in various size measures, calcium carbonate, organic carbon, clay mineralogy and major and trace elements in a core (5.40 m long, 2713 m depth) from the eastern Bay of Bengal. On a CM diagram, ... -
Rare earth element geochemistry of ferromanganese deposits of the Indian Ocean
(Elsevier, 1992)Fourteen manganese nodules and three ferromanganese crusts from the Indian Ocean were analysed for major and minor elements and the 14 naturally occurring rare earth elements (REE). The REE were analysEd. by inductively ... -
Marine magnetic anomalies in the northeastern Arabian Sea
(Oxford and IBH, New Delhi, 1992)Based on the analysis of some additional magnetic profiles, an updated correlation and identification of the sea-floor spreading type magnetic lineations in the northeastern Arabian Sea is presented. The anomaly 24 A-B ... -
Distribution of planktonic foraminifera in waters of the submarine coral banks in southeast Arabian Sea during winter
(NISCAIR, New Delhi, 1992)Twentyfive species of planktonic foraminifera are recorded from 36 plankton tows collected from waters of the submerged coral banks- Bassas de Pedro, Sesostris and Cora Divh-located at northern end of the Laccadive group ... -
Fluctuating sea levels off Bombay (India) between 14,500 and 10,000 years before present
(Current Science Association, Bangalore, India, 1992)A 26.5-metre-long core collected from the outer-shelf area off Bombay (India) at 75 m water depth showed ooids and shallow-water benthic foraminifera all along the core. The presence of these well-known indicators of ... -
The upwelling record in the sediments of the westen continental margin of India
(Pergamon, 1992)Analysis of 63 sediment samples from the western continental margin of India for planktonic foraminifera, organic carbon, biogenic silica and calcium carbonate content showed higher frequency (30-40%) of Globigerina bulloides ... -
Gravity anomalies over a segment of Pratap ridge and adjoining shelf margin basin, western continental margin of India
(Oxford and IBH, New Delhi, 1992)Bathymetric and gravity data totalling 2000 line km on the continental margin off Goa and Mulki, west of India have been studied. The free-air gravity anomalies vary between -60 to 25 mgals with prominent NNW-SSE trends ... -
Design of a gravity corer for near shore sediment sampling
(NISCAIR, New Delhi, 1992)For the purpose of geotechnical investigation a gravity corer has been designed and fabricated to obtain undisturbed sediment core samples from near shore waters. The corer was successfully operated at 75 stations up to ... -
Regional geomorphology of the continental slope of NW India: Delineation of the signatures of deep-seated structures
(Taylor and Francis, 1992)Geomorphological features (derived from 16,000 lkm of echo-sounding and bathymetric data) and deep-seated tectonic tectonic structures of the continental margin off NW India are presented. The shelf break over the entire ... -
Organic carbon removal in the sea: the continental connection
(Geological Society of London, 1992)Time series sediment traps have been deployed since May 1986 in the Arabian Sea and since October 1987 in the Bay of Bengal. The results of one and a half years from the western, central, and eastern Arabian Sea and of one ... -
Magnetic studies over the northern extension of the Prathap ridge complex, eastern Arabian sea
(Springer, 1992)The northern parts of the Prathap and Laccadive Ridge system, eastern Arabian Sea, consist of three parallel basement ridge peaks at varied depths. The topographic highs are associated with either well developed or subdued ... -
A note on incipient spilitisation of central Indian basin basalts
(Geological Society of India, 1992)Rocks dredged in the vicinity of the 79 degrees E fracture zone, in the Central Indian Basin, are sub-alkaline basalts, which are regarded as precursors to spilites. The minerals identified are mainly albitic plagioclase, ...

