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Zircon U‐Pb‐Hf Isotopic Systematics and Geochemistry of the Granites in the Wurinitu Molybdenum Deposit, Inner Mongolia, China: Implications for Tectonic Setting and Genetic Type of Mineralization
Author(s) -
ZHANG Zhenjie,
CHENG Qiuming,
YAO Lingqing,
BAI Huishan,
LI Cheng
Publication year - 2016
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/1755-6724.13022
Subject(s) - zircon , geology , geochemistry , mineralization (soil science) , subduction , geochronology , paleozoic , mesozoic , molybdenum , tectonics , paleontology , chemistry , structural basin , soil science , soil water , inorganic chemistry
The Wurinitu Mo deposit is one of the newly found molybdenum deposits in the southwestern part of the late Paleozoic–Mesozoic Erenhot–Dong‐Ujimqin metallogenic belt (S‐EDMB), Inner Mongolia, China. In the present study, the mineralization age of the Wurinitu deposit is constrained to 137.3 ± 1.3 to 131.9 ± 1.5 Ma based on a combination of the laser ablation–inductively coupled plasma–mass spectrometry (LA–ICP–MS) zircon U–Pb dating of the mineralization related fine‐grained monzonitic granite and the post‐mineralization granite porphyry. The results of zircon Lu–Hf isotopes, combined with the geochemical characteristics of the granites in the S‐EDMB, suggest that the Wurinitu Mo deposit was formed in an extensional environment in relation to the subduction of the Paleo‐Pacific plate in late Mesozoic. The Wurinitu deposit shares similarities with the classical Climax‐type porphyry molybdenum deposits in tectonic setting, mineral assemblages, and metal zonation.