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Geochronological and Geochemical Constraints on the Galinge Skarn Deposit

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Book cover Metallogenic Mechanism of the Galinge Polymetallic Iron Skarn Deposit, Qiman Tagh Mountains, Qinghai Province

Part of the book series: Springer Theses ((Springer Theses))

Abstract

Galinge, the largest iron (Fe) polymetallic skarn deposit in the Qinghai province (NW China), is located in the Qiman Tagh metallogenic belt. At Galinge, post-collisional calc-alkaline metaluminous intrusions, including granodiorite, diorite and diorite porphyry dikes were emplaced into the Cambrian to Ordovician Qiman Tagh strata. Zircon U-Pb dating for granitic rocks yielded ca. 229 ‒ 217 Ma. Phlogopite coexisting with disseminated magnetite was dated to be 234.2 ± 3.5 Ma by Ar-Ar technique, indicating a close temporal magmatic-metallogenic relationship. Geochemically, the Qiman Tagh granodiorite is enriched in light earth element (LREE) with moderately negative Eu anomalies. Such geochemical data and zircon Hf isotopic data suggest that the studied granodiorite might be generated by low-degree partial melting of the amphibolite-facies metamorphosed rocks, whereas the Galinge diorite and diorite porphyry dykes were probably generated by higher degree of partial melting of the residual materials after granodioritic magma. We propose that the Galinge granitic magmatism and skarn Fe mineralization were formed under Late Triassic post-collisional extension after the closure of the Paleo-Tethys.

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Authors and Affiliations

  1. Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring, Ministry of Education, School of Geosciences and Info-Physics, Central South University, Changsha, Hunan, China

    Dr. Miao Yu

  2. MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, CAGS, Beijing, China

    Dr. Miao Yu

  3. China School of Earth and Space Sciences, Peking University, Beijing, China

    Dr. Miao Yu

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Yu, M. (2019). Geochronological and Geochemical Constraints on the Galinge Skarn Deposit. In: Metallogenic Mechanism of the Galinge Polymetallic Iron Skarn Deposit, Qiman Tagh Mountains, Qinghai Province. Springer Theses. Springer, Singapore. https://doi.org/10.1007/978-981-10-7907-8_8

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