Now showing items 5361-5380 of 9513

    • Quaternary carbonate record from the equatorial Indian Ocean and its relationship with productivity changes 

      Naidu, P.D.; Malmgren, B.A. (Elsevier, 1999)
      The CaCO sub(3) content in Quaternary deep-sea sediments from Pacific and Atlantic oceans have been suggested to respond differently to glacial/interglacial cycles; CaCO sub(3), contents are highest during glacials in ...
    • Synthesis of morphotectonics and volcanics of the Central Indian Ocean Basin 

      Mukherjee, A.D.; Iyer, S.D. (Current Science Association, Bangalore, India, 1999)
      The Central Indian Ocean Basin (CIOB) is an enigmatic ocean basin in the young and tectonically complex Indian Ocean. Major tectonic and volcanic forms identified are fracture zones, abyssal hills, seamounts and ridges and ...
    • Some aspects of volcanic ash layers in the Central Indian Basin. 

      Sukumaran, N.P.; Banerjee, R.; Borole, D.V.; Gupta, S.M. (Springer, 1999)
      Intercalated volcanic ash layers in two deep-sea sediment cores from the Central Indian Basin (CIB) are examined for the possibility of an in situ source of suboceanic volcanism. An in situ source has been predicated based ...
    • Gas hydrates stability zone thickness map of Indian deep offshore areas - A GIS based approach 

      Rastogi, A.; Deka, B.; Bhattacharya, G.C.; Ramprasad, T.; KameshRaju, K.A.; Srinivas, K.; Murty, G.P.S.; Chaubey, A.K.; Ramana, M.V.; Subrahmanyam, V.; Sarma, K.V.L.N.S.; Desa, M.; Paropkari, A.L.; Menezes, A.A.A.; Murty, V.S.N.; Antony, M.K.; SubbaRaju, L.V.; Desa, E.; Veerayya, M. (Indian Oil Corporation, New Delhi, India, 1999)
      Natural gas hydrates, which have the potential of being an alternate energy resource, are known to occur worldwide in the sediments of the outer continental margins and in the polar regions in association with permafrost. ...
    • Paleocene on-spreading-axis hotspot volcanism along the Ninetyeast Ridge: An interaction between the Kerguelen hotspot and the Wharton spreading center 

      Krishna, K.S.; Gopala Rao, D.; SubbaRaju, L.V.; Chaubey, A.K.; Shcherbakov, V.S.; Pilipenko, A.I.; Murthy, I.V.R. (Indian Academy of Sciences, Bangalore, India, 1999)
      Investigations of three plausible tectonic settings of the Kerguelen hotspot relative to the Wharton spreading center evoke the on-spreading-axis hotspot volcanism of Paleocene (60-54 Ma) age along the Ninetyeast Ridge. ...
    • Trace elements in near-shore sediments along the east and west coasts of India 

      Paropkari, A.L.; Shirodkar, P.V.; Alagarsamy, R.; Kaisary, S.; Mesquita, A. (Science and Technology Agency of Japan (JISTEC, STA), Japan, 1999)
      To understand the distribution of trace elements and their controlling factors in the coastal regions of India. Some representative sediment samples from the nearshore regions were selected from the east and west coasts ...
    • Neotectonism - An offshore evidence from eastern continental shelf off Visakhapatnam 

      Subrahmanyam, A.S.; Venkateswarlu, K.; Murthy, K.S.R.; Rao, M.M.M.; Rao, K.M.; Raju, Y.S.N. (Current Science Association, Bangalore, India, 1999)
      A minor tremor measuring 4.5 on the Richter scale occurred around 4.58 p.m. on 18 December 1995, with its epicentre located in the Bay of Bengal, nearly 30 km east of Vizianagaram on the Andhra Pradesh coast. The location ...
    • Multibeam echosounder pseudo sidescan images as a tool for manganese nodule exploration 

      Kodagali, V.N.; Chakraborty, B. (International Society of Offshore and Polar Engineers, Cupertino, CA (USA), 1999)
      Deep ocean floor is the storehouse of vast quantities of mineral resources and manganese nodules are one of the important resources. The method of semi quantitative evaluation of nodule resource estimation using the rms ...
    • Volcanogenic-hydrothermal iron-rich materials from the southern part of the Central Indian Ocean Basin 

      Iyer, S.D.; Gupta, S.M.; Charan, S.N.; Mills, O.P. (Elsevier, 1999)
      Reported is the occurrences of magnetite-rich spherules, Ti-rich particles and possibly nontronite recovered at 19 degrees S and 76 degrees E from the pelagic clay in the Central Indian Ocean Basin (CIOB). It is proposed ...
    • A 25 ky BP record of Himalayan aridity using muscovite and clays as proxy climate indicators 

      Gujar, A.R.; Chauhan, O.S. (Museo Geologico di Bologna, 1999)
      Based upon the temporal variations in the grain size parameters, characteristic clay minerals, their ratios and detrital muscovite content in a isotopically dated turbidity free core from hemipelagic environment. (2713 m ...
    • Seabottom backscatter studies in the western continental shelf of India 

      Chakraborty, B.; Pathak, D. (Academic Press, 1999)
      The study is initiated to observe the interaction effects of the sound signal with three different sediment bottoms in the shelf area between Cochin and Mangalore in the western continental shelf of India. An echo signal ...
    • Seasonal and spatial variations in settling manganese fluxes in the northern Arabian Sea 

      Nair, T.M.B.; Ramaswamy, V.; Shankar, R.; Ittekkot, V. (Pergamon, 1999)
      Particulate manganese (Mn) fluxes measured with six time series sediment traps showed that the annual settling fluxes were 3-6 times higher in the west compared to those in the east and central Arabian Sea. Annual detrital ...
    • Studying the Indian Ocean Ridge System: Agenda for the new century 

      Mukhopadhyay, R.; Iyer, S.D.; Banerjee, R.; Drolia, R.K. (Geological Society of India, 1999)
      Studies on the Indian Ocean Ridge System, though sporadic, was aimed to map the complete IORS petrologically and tectonically. Three areas are placed for immediate investigation; one in the slow spreading Carlsberg Ridge ...
    • Modern techniques of sea level measurement 

      Joseph, A. (Marcel Dekker, New York, USA, 1999)
    • Internet-accessible real-time weather information system 

      Desai, R.G.P.; Joseph, A.; Desa, E.; Mehra, P.; Desa, E.; Gouveia, A.D. (Cochin Univ. of Sci. Technol., Cochin, India, 1999)
      An internet-accessible real-time weather information system has been developed. This system provides real-time accessibility to weather information from a multitude of spatially distributed weather stations. The Internet ...
    • A technique to circumvent lower density water trapping by tide-wells 

      Joseph, A.; Vijaykumar, K.; Desa, E.S.; Desa, E.; Peshwe, V.B. (Cochin Univ. of Sci. and Technol., Cochin, India, 1999)
      A 3-year study of water density differences inside and outside of a conventional tide-well indicated that the average water density within the well is consistently lower than the external ambient waters. The tide-well at ...
    • Inter-comparison between Aanderaa and Potok current meters deployed during INDEX programme 

      Fernandes, A.A.; Pednekar, S.M.; Vethamony, P. (International Society of Offshore and Polar Engineers, Cupertino, CA (USA), 1999)
      The results of inter-comparison study between the Aanderaa RCM 7 and Potok 2M current meters deployed in the Southern Equatorial Indian Ocean during April to September 1996 in phase-2 of the INDEX programme has been ...
    • Evaluation of pressure transducers under turbid natural waters 

      Joseph, A.; Desa, E.; Desa, E.; Smith, D.; Peshwe, V.B.; Vijaykumar, K.; Desa, J.A.E. (American Meteorological Society, 1999)
      Pressure measurements made in two turbid natural waters have led to the inference that the effective depthmean in situ density values, rho sub(eff), of these waters are less than (approx equal to 0.4%-4.5%) that of the ...
    • Concentration of metals in fishes from Thane and Bassein creeks of Bombay, India 

      Krishnamurti, A.J.; Nair, V.R. (Council of Scientific and Industrial Research, New Delhi, 1999)
      Concentration of Cu, Zn, Cd, Pb and Ni in different tissues of 10 species of fishes from Thane and Bassein creeks were estimated for a period of 15 months. The trend in bioaccumulation indicated that irrespective of species ...
    • Pollution of coastal seas 

      Varkey, M.J. (Indian Academy of Sciences, Bangalore, India, 1999)
      Pollution of various environments is a consequence of population growth and industrialisation. Coastal seas form part of marine environment and are very rich in minerals, crude oil fishes etc. They are also being used for ...