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re os dating arsenopyrite-43

Peridotite xenoliths which are thought to sample the upper mantle sometimes contain supra-chondritic Os-isotopic ratios.

The first reservoir is characterized by depletion in Re and proxies for melt fertility (such as concentrations of elements like Ca and Al). Direct measurement of the age of continental crust through Re-Os dating is difficult.

A 2.71 /- 0.05 Ga arsenopyrite isochron and 2.707 /- 0.008 Ga highly radiogenic arsenopyrite from a mineralisation along a rock contact, together with a 2.64 /- 0.02 Ga arsenopyrite isochron along the axial plane of the fold core indicate a two-stage mineralisation process. (More)The Storo greenstone belt in Godthabsfjord, southern West Greenland consists of juxtaposed rock units of different age and origin, and hosts gold mineralisation that is associated with arsenopyrite along a contact between lithological units and along the axial plane of a large fold core.

A 2.71 /- 0.05 Ga arsenopyrite isochron and 2.707 /- 0.008 Ga highly radiogenic arsenopyrite from a mineralisation along a rock contact, together with a 2.64 /- 0.02 Ga arsenopyrite isochron along the axial plane of the fold core indicate a two-stage mineralisation process.

Development of Re-Os geochronology for crustal matrices has been ongoing since 1998 in the laboratory.