A Re–Os study of molybdenites from the Lanjiagou Mo deposit of North China Craton and its geological significance |
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| Authors: | Chunming Han Wenjiao Xiao Guochun Zhao Min Sun Wenjun Qu Andao Du |
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| Affiliation: | aState Key laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China;bDepartment of Earth Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China;cNational Research Center of Geoanalysis, Beijing, 100037, China |
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| Abstract: | The Lanjiagou Mo deposit is located in the eastern part of the North China Craton. Rhenium and osmium isotopes in molybdenites from the Lanjiagou porphyry Mo deposit have been used to determine the timing of mineralization. Molybdenite was analyzed mainly from granite porphyry, which is characterized by moderate to strong silicification. Rhenium concentrations in molybdenite samples are between 33 and 48 µg/g. Analysis of eleven molybdenite samples yields an isochron age of 181.6 ± 6.5 Ma (2σ). Based on the geological history and spatio-temporal distribution of the granitoids, it is proposed that the Mo deposits in the eastern part of the North China Craton were related to the subduction of the Paleo-Pacific plate during Jurassic time. |
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| Keywords: | Re– Os study Mo deposit Lanjiagou North China Craton |
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