2009•Acta Petrologica SinicaRequires access

Discovery of a～1.9Ga Mo deposit in the eastern Qinling orogen:Molybdenite Re-Os ages of the Longmendian Mo deposit in Henan Province

Wei Qing

Abstract

The Longmendian Mo deposit,located in the Xiong' ershan area of Henan Province,is hosted in Archean-Paleozoic gneisses of the Taihua Group in the southern margin of the North China craton.Re-Os model ages of five molybdenite samples range from 1868±6Ma to 2044±14Ma and give an isochron age of 1875Ma.These ages suggest that the Longmendian Mo deposit was formed during Palaeoproterozoic,and is the oldest Mo deposit found in China.

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Key concepts: Molybdenite, Isochron, Geology, Craton, Gneiss, Geochemistry, Paleozoic, Archean