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Re-Os Geochronology and Sulfur Isotopes of the Lyangar W-Mo Deposit: Implications for Permian Tectonic Setting in South Tianshan Orogen, Uzbekistan

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Laboratory of Dynamic Diagenesis and Metallogenesis, Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
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Key Laboratory of Paleomagnetism and Tectonic Reconstruct, Ministry of Natural Resources, Beijing 100081, China
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State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, China
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Institute of Geology and Geophysics, Tashkent 100041, Uzbekistan
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School of the Earth Sciences and Resources, China University of Geosciences (Beijing), Beijing 100029, China
*
Author to whom correspondence should be addressed.
Minerals 2019, 9(9), 534; https://doi.org/10.3390/min9090534
Received: 19 July 2019 / Revised: 30 August 2019 / Accepted: 30 August 2019 / Published: 1 September 2019
The Lyangar W-Mo skarn deposit is located in the Nuratau area (western Uzbekistan), South Tianshan Orogen. The skarn system is distributed along the contact zone between the Aktau granitoid and the upper Paleozoic sedimentary rocks. Six molybdenite samples from the Lyangar deposit yielded a Middle Permian Re-Os isochron age of 268.0 ± 12.0 Ma (MSWD = 0.43) and a weighted mean age of 263.8 ± 1.5 Ma (MSWD = 0.22). Molybdenites have low Re contents (12.49 to 16.65 ppm), indicative of a continental crust-dominated source. The molybdenite δ34S values fall inside a narrow range (1.0 to 3.8‰; average 2.3‰), implying that the ore metals were likely derived from the granite intrusion. We concluded that the Lyangar W-Mo deposit was formed in a post-collisional setting caused by continental collision between the Tarim and Kazakhstan cratons. View Full-Text
Keywords: Lyangar W-Mo deposit; molybdenite Re-Os ages; sulfur isotopes; skarn; south Tianshan orogen Lyangar W-Mo deposit; molybdenite Re-Os ages; sulfur isotopes; skarn; south Tianshan orogen
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Zhou, Z.-J.; Chen, Z.-L.; Nurtaev, B.; Shukurov, S.; Han, F.-B.; Wang, Z.-X.; Xiao, W.-F.; Yu, X.-Q. Re-Os Geochronology and Sulfur Isotopes of the Lyangar W-Mo Deposit: Implications for Permian Tectonic Setting in South Tianshan Orogen, Uzbekistan. Minerals 2019, 9, 534.

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