| 黑龙江省跃进山铜金矿床花岗斑岩锆石U-Pb定年及地质意义 |
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| 引用本文： | 韦延兰,杨言辰 刘 娜 韩世炯 王庆双.黑龙江省跃进山铜金矿床花岗斑岩锆石U-Pb定年及地质意义[J].中国地质,2015(1):169-179. |
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| 作者姓名： | 韦延兰 杨言辰 刘 娜 韩世炯 王庆双 |
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| 作者单位： | 1.吉林大学 地球科学学院，吉林 长春 130061；2.中国地质科学院岩溶地质研究所，广西 桂林 541004；3.中国地质调查局发展研究中心（国土资源部矿产勘查技术指导中心），北京 100120 |
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| 基金项目： | 中国地质调查局地质调查项目（1212011120342，12120113098300）资助。 |
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| 摘 要： | 跃进山铜金矿床是完达山活动带的典型矿床,位于密山—敦化深断裂北侧。本文对含矿花岗斑岩开展了锆石LA-ICP-MS U-Pb测年、主量和微量元素的研究,厘定岩体的形成时代,探讨了成矿构造背景。结果表明与成矿密切相关的花岗斑岩的年龄为(109.17±0.91)Ma。它们为过铝质钙碱性系列岩石,富集Rb、Ba、La、Nd、Hf等元素,亏损Nb、Sr、P、Ti等元素,具俯冲带岩浆岩的基本特征,这些暗示它们形成于岛弧或活动大陆边缘环境。结合岩体的地球化学特征和完达山成矿带的构造岩浆演化,认为该矿床形成于岛弧构造背景,其形成与中生代太平洋的俯冲及早白垩世晚期东亚东部岩浆活动陆缘迁移、构造单元转化有关。
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| 关 键 词： | 黑龙江省 跃进山铜金矿 花岗斑岩 LA-ICP-MS锆石U-Pb年龄 构造意义 |
The dating of ore-bearing granite porphyry in the Yuejinshan skarn Cu-Au deposit, Heilongjiang Province, and its tectonic significance |
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| WEI Yan-lan,YANG Yan-chen,LIU N,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].Chinese Geology,2015(1):169-179. |
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| Authors: | WEI Yan-lan YANG Yan-chen LIU N HAN Shi-jiong Wang Qing-shuang |
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| Institution: | 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: | 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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| Keywords: | Heilongjiang Province Yuejinshan Cu-Au deposit granite porphyry LA-ICP-MS zircon U-Pb dating tectonic significance |
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