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    • Keywords


      Cold seep; gas flares; methane hydrate; methane and hydrogen sulfide gases; chemosymbiont.

    • Abstract


      Here we report the discovery of cold-seep ecosystem and shallow methane hydrates (2–3 mbsf) associated with methane gas flares in the water column from the Indian EEZ for the first time. The seep-sites are located in the Krishna–Godavari (K–G) basin at water depths of 900–1800 m and are characterized by gas flares in the water-column images. The occurrence of methane gas hydrates at very shallow depths (2–3 mbsf) at some of the seep-sites is attributed to high methane flux and conducive P–T conditions, necessary for the stability of methane hydrate. Chemosymbiont bearing Bivalves (Vesicomidae, Mytilidae, Thyasiridae and Solemyidae families); Polychaetes (Siboglinidae family) and Gastropods (Provannidae family) are also identified from seep-sites.

    • Author Affiliations


      Mazumdar A1 Dewangan P1 Peketi A1 Gullapalli S1 Kalpana M S2 Naik G P1 Shetty D1 Pujari S1 Pillutla S P K1 Gaikwad V V1 Nazareth D1 Sangodkar N S1 Dakara G1 Kumar A1 Mishra C K1 Singha P1 Reddy R1

      1. Gas Hydrate Research Group, Geological Oceanography, CSIR–National Institute of Oceanography, Dona Paula, Goa 403 004, India.
      2. CSIR–National Geophysical Research Institute, Uppal Road, Hyderabad 500 007, India.
    • Dates

  • Journal of Earth System Science | News

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      Posted on July 25, 2019

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