International Journal of Earth Sciences and Engineering

Ruan Banxiao ¹, Lv Xinbiao ¹, Wu Chunming ¹, Yu Yingmin ²

Affiliations
1 Geologic Survey, China University of Geosciences, Wuhan-430074, CN
2 China University of Geosciences, Wuhan-430074, CN

Abstract

Series of late Mesozoic A-type granite and related polymetallic deposits located in the Southern Great Xing'an Range, NE China. The Bianjiadayuan Pb-Zn-Ag deposit serves a typical example and consists of quartz-sulfide vein-type mineralization within extensional faults related to granite. In situ LA-ICP-MS Hf isotopic analysis was conducted on zircons from ore-related granite. The zircons are characterized by εHf(t) of +2.3-+4.9 with average of +3.08 and T_DM2 of 788-952 Ma, indicating that the granite was derived from a juvenile crust that originated from depleted mantle and contaminated by some ancient continental crust. In term of mineralization,contamination with crust may play an important role in formation of the deposit.

Keywords

Lu-Hf Isotope, Zircon, A-Type Granite, Petrogenesis, Bianjiadayuan, NE China.

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