Browsing by Subject "geochemistry"
Now showing items 41-60 of 115
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Geochemical and isotopic signatures of surficial sediments from the western continental shelf of India: Inferring provenance, weathering, and the nature of organic matter
(Society for Sedimentary Geology, 2013)Bottom sediments from thirteen transects sampled mainly at depth contours of 30, 100, and 200 m along the western continental margin of India, falling in two offshore sectors from Dwaraka to Goa and Cape Comorin to Goa, ... -
Geochemical evidence of terrigenous influence in deep-sea sediments upto 8°S in the Central Indian basin
(Elsevier, 1989)Thirty-two representative deep-sea sediment samples have been studied from three manganese nodule-bearing environments in the Central Indian Basin: diatomaceous-radiolarian ooze-clay, pelagic brown clay and calcareous ooze. ... -
Geochemical studies in the Godavari Estuary, India
(Elsevier, 1993)The dissolved O sub(2), Fe, dissolved organic carbon (DOC), particulate organic carbon (POC), silica and U isotope measurements in reiver-estuarine waters of the Godavari and the concentrations of 23 elements in the suspended ... -
Geochemical trends in the sediments and manganese nodules from a part of the Central Indian Basin
(Geological Society of India, 1994)Geochemical analyses of eighteen surface sediments samples collected from an area between 1 degree-15 degrees S latitudes and 73 degrees-87 degrees E longitudes exhibit significant variation in their chemical ... -
Geochemical variability of copper and iron in Oman margin sediments
(Elsevier, 2009)An analysis of the geochemical distribution of selected trace metals among various geochemical phases of the sediments in the Oman Margin was carried out using a sequential extraction technique. The present study showed ... -
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 ... -
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 ... -
Geochemistry of deep-sea sediment cores from the Central Indian Ocean Basin
(NISCAIR, New Delhi, 1993)Four sediment cores from the Central Indian Ocean Basin (CIOB) were studied to characterise the coarse fraction (less than 63 mu), transition metal and major oxide contents. Transition metals (Mn, Cu, Ni, Zn) show enrichment ... -
Geochemistry of ferromanganese micronodules and associated Mn and trace metals diagenesis at high terrigenous depositional site of middle fan region, Bay of Bengal
(Elsevier, 2003)The influence of sedimentation on the morphology, growth and geochemistry of the micronodules, and on Mn enrichment in the sediments of the Bay of Bengal has been evaluated. Mn accumulation is 307-219 mg cm u2 kyr u-1 in ... -
Geochemistry of Sediment cores of the Western Equatorial Indian Ocean
(Indian Association for Limnology and Oceanography, 1983)Geochemical investigations including partition analysis have been carried out on nine sediment cores from the western equatorial Indian Ocean. The results show that a core from the Arabian Sea exhibits a greater terrigenous ... -
Geochemistry of sediments
(Oxford and IBH, New Delhi, 2001)Considering the potential of elemental data in marine sediments as diagnostic tools of various geological and oceanographic processes, sediment geochemical data from the Indian Ocean region has been reviewed in this article. ... -
Geochemistry of sediments of the eastern continental shelf of India
(Indian Association for Limnology and Oceanography, 1985)The bulk and partition geochemistry of Al, Fe, Ti, Mn, Zn, and Cu have been investigated in sediments of the eastern continental shelf of India. The results show that (1) the bulk geochemistry varies from one shelf unit ... -
Geochemistry of surficial sediments along the central southwest coast of India - Seasonal changes in regional distribution
(Coastal Education and Reserch Foundation, 2003)The coastal sediments (129 samples) of central- southwest coast of India, in and around Cochin, the second biggest industrial city along the west coast of India, were analyzed for their textural and geochemical fractions ... -
Geochemistry of zinc in the sediments of the western continental shelf and slope of India
(Indian Association for Limnology and Oceanography, 1985)The bulk geochemistry of zinc in the sediments of the western continental shelf and slope of India and also the partition geochemistry of the sediments of the shelf and slope regions between Ratnagiri and Mangalore have ... -
Grade distributions in manganese nodules of Central Indian Ocean Basin
(Current Science Association, 1989)Data concerning to geological setting physical characteristics and bulk chemical composition of the nodules sampled from CIOB were stored in the Computer Data Bank of this Institute. Bulk chemical composition of nodules, ... -
Grain size analysis of sediments from the northern Andaman Sea: Comparison of laser diffraction and sieve-pipette techniques
(Coastal Education and Reserch Foundation, 2006)A comparison has been made of sand, silt, and clay percentage of 118 samples from the Ayeyarwady continental shelf, northern Andaman Sea, measured by the sieve-laser diffraction technique and by classical sieve-pipette ... -
Growth rate and chemical composition of a manganese nodule from the EEZ of Seychelles
(Geological Society of India, 1989)mhe ferro-manganese nodule collected in EEZ of Seychelles yields a growth rate of 1.5 mm/10 6Y 230Th (ex)/ and 230Th (ex)/ 232Th activity ratio methods indicating very slow growth of ferro-manganese nodules. The Mn/Fe and ... -
Heavy metal accumulation in a flow restricted, tropical estuary
(Elsevier, 2005)Levels of heavy metals (Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn), organic carbon content and textural characteristics in the surficial sediments of Cochin estuary (SW coast of India) and adjacent coast are presented. ... -
Identification and characterization of tsunami deposits off southeast coast of India from the 2004 Indian Ocean tsunami: Rock magnetic and geochemical approach.
(Indian Academy of Sciences, 2014)The December 2004 Indian Ocean Tsunami (IOT) had a major impact on the geomorphology and sedimentology of the east coast of India. Estimation of the magnitude of the tsunami from its deposits is a challenging topic to be ... -
Ilmenite placer deposits in the bays of Jaigad, Ambwah and Varvada, Maharashtra, India
(Geological Survey and Mines Bureau, Dehiwala, Sri Lanka, 1997)Growing demand for ilmenite owing to very limited resources of rutile and technological advancements in the industrial utilisation of ilmenite in place of rutile have excited interest in large-scale exploration for ilmenite ...