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Криогенные газовые гидраты в субмаринной мерзлоте: проблемы обнаружения и изучения PowerPoint PPT Presentation


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Криогенные газовые гидраты в субмаринной мерзлоте: проблемы обнаружения и изучения. Всероссийский научно исследовательский институт геологии и минеральных ресурсов Мирового океана им. академика И.С. Грамберга. T. Matveeva , A.A. Krylov , E.A. Logvina ( VNIIOkeangeologia , St. Petersburg)

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Криогенные газовые гидраты в субмаринной мерзлоте: проблемы обнаружения и изучения

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T. Matveeva, A.A. Krylov, E.A. Logvina (VNIIOkeangeologia, St. Petersburg)

Gas hydrates in off-shore permafrost: the problem of detection and study

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Sea level

Sea level

Base of GHSZ

Base of GHSZ

  • ESTIMATION OF GHSZ AND PT CONDITIONS

  • Calculation parameters:

  • Water salinity: 35

  • Hydrate-forming gas: pure methane

  • Geothermal gradient:2.7/100 m

  • Water depth: 300 and 280 m

  • Bottom temperature: -1 and -1.750C

  • Results:

  • GHSZ is non-detached from the seafloor

  • Thickness of GHSZ: 300 and 320 m


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HC, MKg/g

DISTRIBUTION OF HYDROCARBONS IN THE BOTTOM SEDIMENTS

OF THE WESTERN ARCTIC SHELF

HCin the sediments:

average = 30 g/g min = 10 g/gmax= 1000 g/g

Courtesy V.I. Petrova


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