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Re-Os geochemistry enlightens our understanding of how metal and hydrocarbon resources are created and where they are located.At the same time, insights from exceptional mineral or organic accumulations shed light on basic geologic processes. Combined with field observations, the data indicate that Mo–Re mineralization in the Baishan deposit is produced by a magmatic-hydrothermal event in an intracontinental extensional setting after late Paleozoic orogeny.The initial This study was financed by the Ministry of Science and Technology of China (2001CB4098CB409805), and the Chinese Academy of Sciences (KZCX3-SW-137).Deng Gang and Yang Zaifeng, XBGMR, and Wang Qingming, Geological Survey Institute of Xinjiang Autonomous Region, offered help during sampling in the field. This manuscript has also benefited from constructive reviews by Robert Frei, Vickie Bennett, and Jeremy Richards.The AIRIE Program has been producing state-of-the-art developmental and analytical work in Re-Os (rhenium-osmium) geochronology and tracer studies since 1995.

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Rhenium and osmium isotopes in sulfide minerals from the Baishan deposit are used to determine the age of mineralization.

Rhenium concentrations in molybdenite samples are between 74 and 250 μg/g.

In Rogaland-Vest Agder, molybdenite associated with deformed quartz and pegmatite veins formed between 982 ± 3 and 947 ± 3 Ma in the amphibolite-facies domain (three deposits) and between 953 ± 3 and 931 ± 3 Ma west of the clinopyroxene-in isograd (two deposits) in the vicinity of the 0.93-0.92 Ga Rogaland anorthosite complex.

The data constrain the last increment of ductile deformation to be younger than 0.95 and 0.93 Ga in these two metamorphic zones, respectively.

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