DRS at CSIR-National Institute of Oceanography: Recent submissions
Now showing items 4201-4220 of 9443
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New evidence for enhanced preservation of organic carbon in contact with oxygen minimum zone on the western continental slope of India
(Elsevier, 1993)In order to evaluate the reason for organic enrichment on the western continental slope of India, we provide Rock-Eval pyrolysis data of 25 surficial sediment samples from this area. Results show that the organic matter ... -
Comment on "Lack of enhanced preservation of organic matter in sediments under the oxygen minimum on the Oman Margin" by T.F. Pedersen, G.B. Shimmield, and N.B. Price
(Pergamon, 1993)A comment on the study on the lack of enhanced preservation of organic matter in sediments under the oxygen minimum on the Oman Margin is given. As such a negative correspondence between productivity and organic enrichment ... -
Lithogenic fluxes to the northern Indian Ocean - An overview
(University of Hamburg, Germany, 1993)Lithogenic fluxes to the northern Indian Ocean, measurEd. by time-series sediment traps, exhibit a strong seasonality with the bulk of the material (40 to 80 %) being deposited during the southwest monsoon period. This ... -
Some new observations on the intra-plate deformation in the Central Indian Basin (CIB)
(Elsevier, 1993)Single channel airgun seismic reflection data from equatorial region of the Central Indian Basin (CIB) revealed some new information on the structure and stratigraphy of the deformed blocks in this area. The data from five ... -
Mineral chemistry of Carlsberg Ridge basalts at 3 degrees 35'- 3 degrees 41' N
(Springer, 1993)Mineral chemical analyses of transitional basalts from the Carlsberg Ridge show plagioclase (An approximately 87 mole %), phenocrysts, and microphenocrysts have a K sub(2)O depletion as compared to the laths (approximately ... -
Growth constraints of the Indian Ocean seamounts
(Indian Geophysical Union, Hyderabad, India, 1993)Distribution and morphology of volcanic seamounts from an area of 84572 km super(2) in the Central Indian Ocean Basin (CIOB) using multibeam bathymetric system are presented here. The study area is boundEd. by two NNE-SSW ... -
Morphology of a coral bank, western continental shelf of India: A multibeam study
(Geological Society of India, 1993)Morphology of a living coral bank (Gaveshani Bank) is described using multibeam swath bathymetric survey system Hydrosweep. The bank has a height of 42 m, length of 2 km and a maximum width of 1.66 km, with steep flanks ... -
Granulometric analyses of pelites using a sedigraph: Examples from a Volcano-sedimentary environment
(Geological Society of India, 1993)This article presents granulometric data of pelites (less than 40 microns) of mixed composition from a volcano-sedimentary environment. The sedigraph serves as an useful tool in the analyses of silt-clay fraction of marine ... -
Manganese nodule distribution in different topographic domains of the central Indian Basin
(Taylor and Francis, 1993)Manganese nodule distribution is primarily influencEd. by seafloor topography. Nodule distribution at 479 locations vis-a-vis seabed topography is studiEd. by superimposing sampling location on the topographic profile and ... -
Spreading history of the Arabian Sea: Some new constraints
(Elsevier, 1993)Based on a new identification of magnetic anomalies, additional constraints are provided on the two episodes of spreading history of the Arabian Sea. Commencing at A27, the older phase ended at A21 and sprading of the ... -
On the possibility of allochtonous peat on the inner shelf off Karwar
(Current Science Association, Bangalore, India, 1993)Peat deposits occupying an area of more than 139 km super(2), intercalated in sediments from the inner shelf of Karwar-Kumta, Karnataka, India, have been identified. Such organic-rich nearshore facies are rare and hence ... -
Suspended sediment transport and shoaling in the Munambam fishery harbour, Kerala
(Kerala Science Congress, 1993)Results of the monthly synoptic field observations of vertical profiles of suspended sediment concentration, current velocity and salinity carried out in the Azhicode Estuary are presented with a view to understand the ... -
Rare earth element distribution and behaviour in buried manganese nodules from the Central Indian Basin
(Elsevier, 1993)Eight burried manganese nodules taken in the upper metre of a siliceous ooze sediment core in the Central Indian Basin at 14 degrees S and 74 degrees E were analysed for major, trace and rare earth (REE) elements. ... -
Depositional processes inferred from the log probability distribution
(Hindustan Publishing Corporation, Delhi, 1993) -
A new report on the occurrence of zeolitites in the abyssal depths of the Central Indian Basin
(Society for Sedimentary Geology, 1993)Forty-two indurated slabs of zeolites collected from the abyssal depths of the Central Indian Basin have been studied. The slabs show characters similar to harmotome-rich scorias of the Society Ridge and phillipsite slabs ... -
Hydrocarbon prospects of the western continental slope of India as indicatEd. by surficial enrichment of organic carbon
(Indian Petroleum Publishers, Dehra Dun, India, 1993)The sediments from the continental mid-slope (150-1500 m depth) of the western margin are highly enriched in organic carbon (upto 16%) occurring as a long and wide band off Bombay to southern tip of India. Organic carbon ... -
Evidence of climatic change during Holocene in the nearshore regions of Konkan (central west coast of India
(Museo Geologico di Bologna, 1993)In order to understand the paleoenvironmental setting of the nearshore area of the central west coast of India, three vibro-cores from the Kalbadevi Bay, from a depth range of 6-12 m were analysed for sedimentological, ... -
Quantitative estimation of seafloor features from photographs and their application to nodule mining
(Taylor and Francis, 1993)Methods developed for quantitative estimation of seafloor features from seabed photographs and their application for estimation of nodule sizes, coverage, abundance, burial, sediment thickness, extent of rock exposure, ... -
Influences of Holocene sea level, regional tectonics, and fluvial, gravity and slope currents induced sedimentation on the regional geomorphology of the continental slope off northwestern India
(Elsevier, 1993)Regional geomorphology derived from echosounding and bathymetric data (lines of a total of 12,000 km), depth to basement, regional deep seated tectonic features, surficial sediment distribution and Holocene sedimentation ... -
Evidences of climatic variations during Late Pleistocene- Holocene in the eastern Bay of Bengal
(Current Science Association, Bangalore, India, 1993)Based upon the variations of clay minerals, sediment texture, heavy mineral assemblage and sup(230)Th excess in the Late Pleistocene sediments of a hemipelagic core from the eastern Bay of Bengal (2713 m water depth), 35 ...