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Diagenetic formation of greigite and pyrrhotite in gas hydrate marine sedimentary systems

Larrasoana, Juan C; Roberts, Andrew; Musgrave, Robert; Gracia, Eulalia; Pinero, Elena; Vega, Marta; Martinez-Ruiz, Francisca


Mineral magnetic results and electron microscope observations from gas hydrate-bearing marine sediments cored at southern Hydrate Ridge during Ocean Drilling Program Leg 204 (Sites 1244 to 1252, Cascadia Margin, offshore Oregon) demonstrate that authigenic greigite and pyrrhotite formed as a byproduct of microbially-mediated diagenetic reactions in the sulphate, the anaerobic oxidation of methane (AOM), and the methanic/gas hydrate zones. Geochemical conditions favourable for formation and...[Show more]

CollectionsANU Research Publications
Date published: 2007
Type: Journal article
Source: Earth and Planetary Science Letters
DOI: 10.1016/j.epsl.2007.06.032


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