Re os dating arsenopyrite pb pb dating

09-Oct-2019 22:32

Furthermore, the result also implies that the age of the Gaixian Formation in the Maoling district is older than 2316±40 Ma.

To learn more or modify/prevent the use of cookies, see our Cookie Policy and Privacy Policy.Both Precambrian (~1.0 Ga) and/or Late Cretaceous-early Tertiary ages have been proposed based on radiogenic isotope methods (i.e., K/Ar, Ar) used to determine ages of non-sulfide vein minerals.Here we report the first Re-Os geochronological data on arsenopyrite (aspy) extracted from a quartz-siderite vein from the 4000 ft. Arsenopyrite formed during the late stages of massive siderite precipitation — the main gangue mineral of the Ag-rich veins.Among these, the Carlin-like deposits are relatively rare, as compared to the typical orogenic gold deposits.

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The Yunnan–Guizhou–Guangxi “golden triangle” in southwestern China is one of the few important areas for Carlin-like gold deposits.The data also suggest that significant tectonic deformation of the Belt metasediments in and around the district, which predates the emplacement of the Ag-Pb-Zn veins, was associated with an orogenic event older than 1200 Ma, likely the 1.3 Ga East Kootenay orogeny, and not with the accretion of the Wallowa-Seven Devils terrane in the Early Cretaceous. 26--Booth# 17Economic Geology (Posters): All subjects, including IOCG and Porphyry Copper Deposits; Epithermal-Hot Springs; Non-Sulfide Ores; Gold; Magmas and Volatiles; and Copper in Asia Oregon Convention Center: Hall A AM- PM, Sunday, 18 October 2009Geological Society of America Abstracts with Programs, Vol. Permission is hereby granted to the author(s) of this abstract to reproduce and distribute it freely, for noncommercial purposes.