U–Pb and Re–Os Ages of the Huaheitan Molybdenum Deposit,NW China |
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| Authors: | Jiang Zhu Xinbiao Lü Chao Chen Xiaofeng Cao Chunming Wu |
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| Institution: | 1. Research Center of Granitic Diagenesis and Mineralization, China Geological Survey, , Wuhan, China;2. Wuhan Center of Geological Survey, China Geological Survey, , Wuhan, China;3. Faculty of Earth Resources, China University of Geosciences, , Wuhan, China |
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| Abstract: | The Huaheitan molybdenum deposit in the Beishan area of northwest China consists of quartz‐sulfide veins. Orebodies occur in the contact zone of the Huaniushan granite. LA‐ICPMS U–Pb zircon dating constrains the crystallization of the granite at 225.6 ± 2.2 Ma (2σ, MSWD = 4.5). Re–Os dating of five molybdenite samples yield model ages ranging from 223.2 ± 3.5 Ma to 228.6 ± 3.4 Ma, with an average of 225.2 ± 2.4 Ma. The U–Pb and Re–Os ages are identical within the error, suggesting that the granite and related Huaheitan molybdenum deposit formed in the Late Triassic. Our new data, combined with published geochronological results from the other molybdenum deposits in this region, imply that intensive magmatism and Mo mineralization occurred during 240 Ma to 220 Ma throughout the Beishan area. |
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| Keywords: | Beishan area Huaheitan molybdenum deposit Re– Os molybdenite dating U– Pb zircon dating |
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