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Mud volcano gas hydrates in the Gulf of Cadiz (2002)

Mazurenko, L. L. ; Soloviev, V. A. ; Belenkaya, I. ; [et al.]

Oxford, UK : Blackwell Science Ltd

Terra nova 14 (2002), S. 0

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ISSN: 1365-3121

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Geosciences

Notes: This paper presents new geochemical data on gas-hydrate-bearing mud volcanoes discovered for the first time in the Gulf of Cadiz during cruises TTR9 and TTR10 of the R/V Professor Logachev in 1999–2000. The estimated gas hydrate content is 3–16% of sediment volume and 5–31% of pore space volume. Estimated values of the water isotopic composition for the Ginsburg mud volcano are very heavy for δ18O (up to +53‰) and light for δD (up to − 210‰). Gas released from the hydrates contains 81% of C1 and 19% of C2+. The inferred source of the gas in the hydrates is enriched in C2–C6 (≤ 5%), indicating that the gas has a thermogenic origin. Gas hydrate of cubic structure II should be formed from a gas of such composition. It is interpreted that the composition of the mud volcano fluid corresponds to deep oil basins below the Gulf of Cadiz.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1046/j.1365-3121.2002.00428.x

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