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WEI Yan-lan, YANG Yan-chen, LIU Na, HAN Shi-jiong, Wang Qing-shuang. The dating of ore-bearing granite porphyry in the Yuejinshan skarn Cu-Au deposit, Heilongjiang Province, and its tectonic significance[J]. GEOLOGY IN CHINA, 2015, 42(1): 169-179. DOI: 10.12029/gc20150112
Citation: WEI Yan-lan, YANG Yan-chen, LIU Na, HAN Shi-jiong, Wang Qing-shuang. The dating of ore-bearing granite porphyry in the Yuejinshan skarn Cu-Au deposit, Heilongjiang Province, and its tectonic significance[J]. GEOLOGY IN CHINA, 2015, 42(1): 169-179. DOI: 10.12029/gc20150112
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The dating of ore-bearing granite porphyry in the Yuejinshan skarn Cu-Au deposit, Heilongjiang Province, and its tectonic significance

  • 1.

    Collega of Earth Sciences, Jilin University, Changchun 130061, Jilin, China

  • 2.

    Institute of Karst Geology, CAGS, Guilin 541004, Guangxi, China

  • 3.

    Technology Guiding Center of Mineral Prospecting, Ministry of Land and Resources, Beijing 100037, China

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  • Abstract: The Yuejinshan Cu-Au deposit, located in southeast Heilongjiang Province, is a typical deposit which occurs in the north of Mishan-Dunhua Deep fracture of the Wandashan metallogenic belt. The authors carried out LA-ICP-MS zircon U-Pb dating of main and trace elements in the granite porphyry, and discussed the chronology of the rock mass and the tectonic setting. The results indicate that the ore-related Yuejinshan granite porphyry has a concordia LA-ICP-MS zircon U-Pb age of (109.17±0.91) Ma, which is basically in good consistency with the weighted average age. The Yuejinshan granite porphyry has a geochemical affinity with subduction magmas, characterized by peraluminous nature, enrichment of LILIs (Rb, Ba, La, Nd and Hf), and depletion of HFSE (Nb, Sr, P and Ti). The geochronologic and geochemical characteristics of the Yuejinshan granite porphyry, combined with tectonic evolution of the Wandashan metallogenic belt, suggest that the deposit was formed in a island arc or active continental margin setting and that its formation was probably related to the subduction of the Paleo-Pacific Ocean during the Mesozoic.
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