Metallogenic Mechanism and Tectonic Setting of Tungsten Mineralization in the Yangbishan Deposit in Northeastern China  

作　　者：HAO Yujie REN Yunsheng ZHAO Hualei LAI Ke ZHAO Xuan MA Yupeng 

机构地区：[1]College of Earth Sciences, Jilin University, Changchun 130061, China [2]Key Laboratory of Mineral Resources Evaluation in 130061, Jilin, China Northeast Asia, Ministry of Land and Resources of China, Changchun 130026, Jilin, China [3]Tianjin Institute of Geology and Mineral Resources, Tianjin 300170, China

出　　处：《Acta Geologica Sinica(English Edition)》2018年第1期241-267,共27页地质学报（英文版）

基　　金：supported by the National Key R&D Program of China(2017YFC0601304);the National Basic Research Program of China(also called 973 Program)(No.2013CB429802);the National Natural Science Foundation of China(NSFC)(No.41272094)

摘　　要：The Yangbishan iron-tungsten deposit in the Shuangyashan area of Heilongjiang Province is located in the center of the Jiamusi Massif in northeastern China. The rare earth element and trace element compositions of the scheelite show that it formed in a reducing environment and inherited the rare earth element features of the ore-forming fluid. The geochemical characteristics of the gneissic granite associated with the tungsten mineralization show that the magma formed in this reducing environment and originated from the partial melting of metamorphosed shale that contained organic carbon and was enriched with tungsten. In addition, in situ Hf isotopic analysis of zircons from the gneissic granite indicates that they probably originated from the partial melting of a predominantly Paleo-Mesoproterozoic crustal source. According to LA-ICP-MS zircon dating, the Yangbishan ore- related gneissic granite has an Early Paleozoic crystallization age of 520.6 ＋ 2.8 Ma. This study, together with previous data, indicates that the massifs of northeastern China, including Erguna, Xing＇an, Songliao, Jiamusi, and Khanka massifs, belonged to an orogenic belt that existed along the southern margin of the Siberian Craton during the late Pan-African period. The significant continental movements of this orogeny resulted in widespread magmatic activity in northeastern China from 530 Ma to 470 Ma under a tectonic setting that transitioned from compressional syn-collision to extensional post- collision.The Yangbishan iron-tungsten deposit in the Shuangyashan area of Heilongjiang Province is located in the center of the Jiamusi Massif in northeastern China. The rare earth element and trace element compositions of the scheelite show that it formed in a reducing environment and inherited the rare earth element features of the ore-forming fluid. The geochemical characteristics of the gneissic granite associated with the tungsten mineralization show that the magma formed in this reducing environment and originated from the partial melting of metamorphosed shale that contained organic carbon and was enriched with tungsten. In addition, in situ Hf isotopic analysis of zircons from the gneissic granite indicates that they probably originated from the partial melting of a predominantly Paleo-Mesoproterozoic crustal source. According to LA-ICP-MS zircon dating, the Yangbishan ore- related gneissic granite has an Early Paleozoic crystallization age of 520.6 ＋ 2.8 Ma. This study, together with previous data, indicates that the massifs of northeastern China, including Erguna, Xing＇an, Songliao, Jiamusi, and Khanka massifs, belonged to an orogenic belt that existed along the southern margin of the Siberian Craton during the late Pan-African period. The significant continental movements of this orogeny resulted in widespread magmatic activity in northeastern China from 530 Ma to 470 Ma under a tectonic setting that transitioned from compressional syn-collision to extensional post- collision.

关 键 词：SCHEELITE Yangbishan iron-tungsten deposit Early Paleozoic late Pan-African period Central Asian Orogenic Belt 

分 类 号：P0[天文地球]