Description: Currently you are watching Re-os dating arsenopyrite porn video uploaded to: Hairy porn category. You can find more videos like Re-os dating arsenopyrite below in the related videos section. The Meguma terrane is dominated by two rock types, regionally deformed and metamorphosed Cambro-Ordovician metasedimentary rocks and ca. The metasedimentary rocks contain numerous orogenic-type, vein-hosted gold deposits which occur throughout the sandstone-dominated Goldenville Group rather than the overlying siltstone- and mudrock-dominated Halifax Group. These mineralized veins are dominated by quartz-carbonate-sulfide assemblages and occupy structures consistent with emplacement during late-stage fold tightening of the regional, northeast-trending, upright folds formed during Neoacadian deformation at ca. Our previous work suggests vein formation, hence gold mineralization, spanned Ma, as constrained from field observations and radiometric dating. The former indicates veins post-date cleavage formation given that cleaved wall-rock fragments occur in some veins and that rarely veins post-date hornfels related to Ma granites. Here we report new Re-Os geochronological data generated from arsenopyrite in gold-rich veins for two deposits sampled, both of which lie in the same stratigraphic-structural position in the lower part of the Goldenville Group. Six arsenopyrites closely related to Au mineralization of the Maoling gold deposit are dated by Re-Os technique and define a Re-Os isochron.
Added: 12.11.2018 at 14:04
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