Options
Methane and hydrogen sulfide seepage in the NW Peloponnesus petroliferous basin (Greece): origin and geohazard
Author(s)
Language
English
Status
Published
Peer review journal
Yes
Title of the book
Issue/vol(year)
90
Publisher
American Association of Petroleum Geologists
Pages (printed)
701-713
Issued date
May 2006
Alternative Location
Abstract
Gas seepages along the Ionian coast of the northwestern Peloponnesus
(Greece), at Killini, Katakolo, and Kaiafas reflect deep
hydrocarbon-generation processes and represent a real hazard for
humans and buildings. Methane microseepage, gas concentration in
offshore and onshore vents, and gas dissolved in water springs,
including the isotopic analysis of methane, have shown that the
seeps are caused by thermogenic methane that had accumulated in
Mesozoic limestone and had migrated upward through faults, or
zones of weakness, induced by salt diapirism. A link between local
seismicity and salt tectonics is suggested by the analyses of hypocenter
distribution. Methane acts as a carrier gas for hydrogen sulfide
produced by thermal sulfate reduction and/or thermal decomposition
of sulfur compounds in kerogen or oil. Methane seeps in
potentially explosive amounts, and hydrogen sulfide is over the
levels necessary to induce toxicological diseases and lethal effects.
(Greece), at Killini, Katakolo, and Kaiafas reflect deep
hydrocarbon-generation processes and represent a real hazard for
humans and buildings. Methane microseepage, gas concentration in
offshore and onshore vents, and gas dissolved in water springs,
including the isotopic analysis of methane, have shown that the
seeps are caused by thermogenic methane that had accumulated in
Mesozoic limestone and had migrated upward through faults, or
zones of weakness, induced by salt diapirism. A link between local
seismicity and salt tectonics is suggested by the analyses of hypocenter
distribution. Methane acts as a carrier gas for hydrogen sulfide
produced by thermal sulfate reduction and/or thermal decomposition
of sulfur compounds in kerogen or oil. Methane seeps in
potentially explosive amounts, and hydrogen sulfide is over the
levels necessary to induce toxicological diseases and lethal effects.
Type
article
File(s)
No Thumbnail Available
Name
AAPG-Etiope et al 2006.pdf
Size
1.98 MB
Format
Adobe PDF
Checksum (MD5)
60de3e1bdf969640b1b708914e291e90