Mesozoic magmatism and metallogenesis associated with the destruction of the North China Craton: Evidence from U-Pb geochronology and stable isotope geochemistry of the Mujicun porphyry Cu-Mo deposit

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• 作者：Guochen Dong^a ; ^b ; ^{donggc@cugb.edu.cn} ; M. Santosh^a ; ^b ; Shengrong Li^a ; ^b ; Junfeng Shen^a ; ^b ; Xuanxue Mo^a ; ^b ; Steve Scott^a ; ^c ; Kai Qu^a ; Xia Wang^a
• 关键词：Geochronology ; Stable isotope geochemistry ; Mujicun Cu&ndash ; Mo deposit ; Craton destruction ; Tectonics ; North China Craton
• 刊名：Ore Geology Reviews
• 出版年：2013
• 出版时间：September, 2013
• 年：2013
• 卷：53
• 期：Complete
• 页码：434-445
• 全文大小：1567 K

文摘

The North China Craton (NCC) provides a classic example of lithospheric destruction and refertilization. The timing and duration of magmatism and related metallogenesis associated with the destruction process are pivotal to understanding the geodynamic controls. In this study, we present zircon U-Pb and Hf data, Re-Os ages, and He, Ar, Pb and S isotope data from the Mujicun porphyry Cu-Mo deposit in the northern Taihang Mountains within the Central Orogenic Belt of the NCC. We constrain the timing of magmatism as 144.1 ¡À 1.2 Ma from zircon U-Pb data on the diorite porphyry that hosts Cu-Mo mineralization. Another U-Pb age of 139.7 ¡À 1.4 Ma was obtained from an epidote skarn that is located in the contact zone between the porphyry and its wall rocks. These data and five Re-Os molybdenite ages that range from 142.7 ¡À 2.0 Ma to 138.5 ¡À 1.9 Ma suggest that magmatism and mineralization occurred in about five million year duration from ~ 143 Ma to ~ 138 Ma. The He, Ar, Pb and, Hf data suggest that magmatism involved recycled Neoarchean lower crustal components, with input of heat and volatiles from an upwelling mantle. The Mujicun porphyry and associated mineralization provide a typical example for magmatism and metallogeny associated with lithospheric thinning in the NCC.