Temporal and spatial separation mechanisms of the Cu and Mo mineralization in the Dabate porphyry deposit, Western Tianshan, Xinjiang, China

Zheng, Shaohua; Gu, Xiaohong; Zhang, Yongmei; Wang, Jialin; Peng, Yi‐Wei; Xu, Jingchi; Xing, Lidan

doi:10.1016/j.oregeorev.2022.104924

Cited by 2 publications

(1 citation statement)

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“…The molybdenum deposits in China are mainly the products of the late Indosinian to Yanshanian magmatism, which is different from the late Cretaceo-Oligocene molybdenum deposits in foreign countries [7][8][9]. The study of geochronology and petrogeochemistry of intrusions which the porphyry deposits occurred in is not only helpful to understand the process of diagenesis and mineralization [10][11][12][13][14][15], but can also reflect the tectonic evolution process controlling the formation of intrusions and ore deposits [16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Geochronology, Geochemistry, and Lu-Hf Isotopic Compositions of Monzogranite Intrusion from the Chang’anpu Mo Deposit, NE China: Implications for Tectonic Setting and Mineralization

et al. 2022

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The Chang’anpu Molybdenum deposit occurs in the monzogranite intrusions in the Lesser Khingan Mountains-Zhangguangcai Mountains metallogenic belt. Previous work focused on the study of deposits, including geological characteristics, mineralization time, S-Pb isotope, etc. However, systematic petrogeochemical study of monzogranite intrusion and comparative analysis with other porphyry deposits in the region are lacking. Three monzogranite dating samples yield LA-ICP-MS zircon weighted mean 206Pb/238U ages of 174.7 ± 1.3 Ma, 174.9 ± 1.4 Ma, and 174.3 ± 1.8 Ma, respectively, indicating that the magmatism occurred in the middle Jurassic of Mesozoic. The 14 monzogranite samples show alkali rich and relatively high silica content (up to 84.39%) with the differentiation index (DI) ranges from 86 to 96, showing that monzogranite have been subjected to fractional crystallization during its evolution; the depletion of Ba, Sr, P, Nb, Ti, and Eu also indicates that the rock has undergone crystallization fractionation, the monzogranite belong to the highly fractionated I-type. Positive εHf(t) values (6.72–8.85) and young TDM2 (551–673 Ma) of the monzogranite indicate that the formation of Chang’anpu monzogranite intrusion is related to the partial melting of juvenile lower crust, originated from the Mesoproterozoic depleted mantle. The magmatism and related Mo mineralization in the Chang’anpu deposit occurred in an active continental margin setting associated with westward subduction of the Paleo-Pacific plate beneath the Eurasian plate.

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