多宝山矿集区,铜山铜矿床,Ⅴ号矿体,辉钼矿,Re-Os同位素,成矿物质来源


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,"/> <p class="MsoNormal"> 大兴安岭多宝山矿集区铜山超大型斑岩铜矿床成矿时代与物质来源——辉钼矿Re-Os同位素示踪

吉林大学学报(地球科学版) ›› 2026, Vol. 56 ›› Issue (5): 1589-1604.doi: 10.13278/j.cnki.jjuese.20250276

• 地质与资源 • 上一篇    下一篇

大兴安岭多宝山矿集区铜山超大型斑岩铜矿床成矿时代与物质来源——辉钼矿Re-Os同位素示踪

赵俊康1,2,3，张荣庆1，赖晓丹1，范建彪1，高跃2，王宇晨2，李闪1，王建华2，杜英杰2，索青宇4   

  1. 1.紫金矿业集团股份有限公司矿产地质勘查院，福建厦门361015

    2.黑龙江多宝山铜业股份有限公司，黑龙江嫩江161416

    3.紫金矿业集团西南地质勘查有限公司，成都610051

    4.昆明理工大学国土资源工程学院，昆明650093

  • 出版日期:2026-09-26 发布日期:2026-10-18
  • 基金资助:

    国家重点研发计划项目（2022YFC2903604）


Metallogenic Age and Sources of Ore-Forming Materials of Tongshan Supergiant Porphyry Copper Deposit in Duobaoshan Ore District, Great Xing’an Range: Constraints from Molybdenite Re-Os Isotope Geochronology

Zhao Junkang1,2,3，Zhang Rongqing1，Lai Xiaodan1，Fan Jianbiao1，Gao Yue2，Wang Yuchen2，Li Shan1，Wang Jianhua2，Du Yingjie2，Suo Qingyu4   

  1. 1. Institute of Geology and Mineral Exploration, Zijin Mining Group Co., Ltd. ,Xiamen 361015, Fujian, China

    2.  Heilongjiang Duobaoshan Copper Industry Inc., Nenjiang 161416, Heilongjiang, China

    3. Zijin Mining Group Southwest Geological Exploration Co., Ltd., Chengdu 610051, China

    4. Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, China

  • Online:2026-09-26 Published:2026-10-18
  • Supported by:
    Supported by the National Key Research and Development Program of China (2022YFC2903604)

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摘要： 铜山铜矿床是大兴安岭多宝山矿集区的超大型铜矿床，累计查明铜资源量达416万t。2020年之后新发现的Ⅴ号矿体铜资源量达281万t，且矿体尚未封闭，向下仍有较大增储空间。钻探工程揭示，在Ⅴ号矿体南侧地表以下1 700 m的部分区域发育强硅化-钾化蚀变，在Ⅲ号矿体南侧地表以下1 300 m深部发育强硅化-钾化英云闪长岩，指示其热液中心埋深为1.3~1.7 km，并推测强硅-钾化核南侧的绢英岩化带仍具有较好的找矿前景。为了揭示Ⅴ号矿体的成矿时代、成矿物质来源，以及与多宝山铜矿床的成因联系，对Ⅴ号矿体中与铜矿化共生的辉钼矿进行Re-Os同位素测试分析。结果表明：辉钼矿Re-Os同位素模式年龄为468.1~464.2 Ma，等时线年龄为（463.7±4.7）Ma（MSWD = 0.37，n=4）；Ⅴ号矿体成矿时代晚于多宝山铜矿床主成矿期（约475 Ma），暗示Ⅴ号矿体具有相对独立的热液中心；Ⅴ号矿体辉钼矿w(Re)平均值为1 026.98×10-6，显著高于多宝山矿床（467.58×10-6）和铜山铜矿床其余矿体（601.85×10-6），表明Ⅴ号矿体成矿岩浆源区性质更偏幔源。结合区域S、Pb同位素资料，认为多宝山矿集区成矿物质以幔源为主，壳源贡献相对有限。

关键词: 多宝山矿集区')">

多宝山矿集区, 铜山铜矿床, Ⅴ号矿体, 辉钼矿, Re-Os同位素,
')">成矿物质来源


Abstract:

The Tongshan copper deposit is a super-large copper deposit in the Duobaoshan ore district of the Great Xing’an Range, with total identified Cu resources of 4.16 Mt. The newly discovered No.Ⅴ orebody, identified after 2020, contains 2.81 Mt of Cu resources and remains open at depth, indicating substantial potential for further resource expansion. Drilling has revealed zones of intense silicic-potassic alteration within the No.Ⅴ orebody at depths of approximately 1 700 m below surface. In addition, strongly silicified and potassic-altered tonalite has been identified in the deep southern part of the No.Ⅲ orebody at approximately 1 300 m depth. These features indicate that the hydrothermal center is buried at a depth of approximately 1.3-1.7 km. The quartz-sericite alteration zone south of the intense silicic-potassic alteration core is therefore inferred to have favorable exploration potential. To constrain the mineralization age, the source of ore-forming materials, and the genetic relationship between the No.Ⅴ orebody and the Duobaoshan copper deposit, we conducted Re-Os isotope analyses of molybdenite that coexists with Cu mineralization in the No.Ⅴ orebody. The results show that molybdenite Re-Os model ages range from 468.1 to 464.2 Ma, with an isochron age of (463.7±4.7) Ma (MSWD=0.37, n=4). The mineralization age of the No.Ⅴ orebody is slightly younger than the main mineralization stage of the Duobaoshan copper deposit (ca. 475 Ma), suggesting that the No.Ⅴ orebody may have formed from an independent hydrothermal center. The average Re content of molybdenite from the No.Ⅴ orebody is 1 026.98×10-6, significantly higher than that of the Duobaoshan deposit (467.58×10-6) and of the other orebodies in the Tongshan copper deposit (601.85×10-6). This indicates that the ore-forming magma source of the No.Ⅴ orebody had a stronger mantle-derived signature. Together with regional S and Pb isotopic data, these results suggest that the ore-forming materials in the Duobaoshan ore district were dominated by mantle-derived components, with only a limited crustal contribution.


Key words: Duobaoshan ore district, Tongshan copper deposit, No. Ⅴ orebody, molybdenite, Re-Os isotopes, source of ore-forming materials

中图分类号: 

  • P618.41
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