地学前缘 ›› 2026, Vol. 33 ›› Issue (3): 211-227.DOI: 10.13745/j.esf.sf.2024.12.199

• 物质来源与流体演化 • 上一篇    下一篇

大兴安岭北段天望台山金矿床流体包裹体、黄铁矿微量元素及H-O-S-Pb同位素研究

陆胜1,2,3,4(), 武广2,*(), 李成禄4, 倪福庆3, 苏海洋3, 宋志超3, 张志博3, 刘桂香5,*()   

  1. 1.中国地质调查局哈尔滨自然资源综合调查中心 自然资源部哈尔滨黑土地地球关键带野外科学观测研究站, 黑龙江 哈尔滨 150086
    2.中国地质科学院矿产资源研究所 自然资源部成矿作用与资源评价重点实验室, 北京 100037
    3.黑龙江省第五地质勘查院, 黑龙江 哈尔滨 150090
    4.黑龙江省自然资源调查院, 黑龙江 哈尔滨 150036
    5.中国地质调查局沈阳地质调查中心, 辽宁 沈阳 110034
  • 收稿日期:2024-05-06 修回日期:2025-03-06 出版日期:2026-05-25 发布日期:2026-03-26
  • 通信作者: *武 广(1965—),男,研究员,博士生导师,主要从事矿床学和区域成矿规律研究。E-mail: wuguang65@163.com;刘桂香(1966—),女,研究员,主要从事勘查技术与工程研究。E-mail: 549462147@qq.com
  • 作者简介:陆 胜(1985—),男, 高级工程师, 博士, 主要从事矿床成因及岩石地球化学研究。E-mail: dkwy2021@163.com
  • 基金资助:
    中国矿产地质志项目(DD20221695);中国矿产地质志项目(DD20190379);中国矿产地质志项目(DD20160346);中国地质调查局地质调查项目(DD20242753);中国地质调查局地质调查项目(DD20240206702);黑龙江省重点研发计划项目(GA21A204)

Study on fluid inclusions, trace elements in pyrite, and H-O-S-Pb isotopes of the Tianwangtaishan Au deposit in the northern Great Xing’an Range

LU Sheng1,2,3,4(), WU Guang2,*(), LI Chenglu4, NI Fuqing3, SU Haiyang3, SONG Zhichao3, ZHANG Zhibo3, LIU Guixiang5,*()   

  1. 1. Harbin Observation and Research Station of Earth Critical Zone in Black Soil, Ministry of Natural Resources, Harbin Center for Integrated Natural Resources Survey, China Geological Survey, Harbin 150086, China
    2. MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China
    3. The Fifth Geological Exploration Institute of Heilongjiang Province, Harbin 150090, China
    4. Natural Resources Survey Institute of Heilongjiang Province, Harbin 150036, China
    5. Shenyang Geological Survey Center of China Geological Survey, Shenyang 110034, China
  • Received:2024-05-06 Revised:2025-03-06 Online:2026-05-25 Published:2026-03-26

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摘要：

天望台山金矿床位于大兴安岭北段黑龙江省呼玛县。本文开展了天望台山金矿床赋矿围岩及脉岩的锆石U-Pb定年、流体包裹体显微测温、H-O-S-Pb组成和黄铁矿微量元素含量分析,探讨了成岩成矿时代,成矿流体性质、来源及演化,以及成矿物质来源。锆石U-Pb定年结果表明,赋矿围岩光华组流纹质岩屑晶屑熔结凝灰岩形成于(116±2) Ma,闪长玢岩形成于(114±2) Ma。流体包裹体岩相学、显微测温研究表明,天望台山金矿床仅发育富液两相流体包裹体,成矿流体为中-低温、低盐度H2O-NaCl体系。H-O-S-Pb同位素结果表明,成矿物质来源于岩浆,成矿流体以大气降水为主。成矿期黄铁矿具有低的Co和Ni含量,Co/Ni值均小于1,亦表明该矿床形成于中低温环境,成矿物质主要来自下白垩统光华组赋矿围岩。流体冷却是该矿床矿质沉淀的主要机制,天望台山金矿床成因类型为低硫化浅成低温热液型。

关键词: 成矿时代, 流体包裹体, H-O-S-Pb同位素, 黄铁矿微量元素分析, 天望台山金矿床, 大兴安岭北段

Abstract:

The Tianwangtaishan Au deposit in the northern Great Xing’an Range is located in Huma County, Heilongjiang Province. This study presents zircon U-Pb dating of ore-hosting rocks and dykes, microthermometric and H-O isotopic analyses of fluid inclusions in quartz veins, and S-Pb isotopic and trace element analyses of pyrite samples from the Tianwangtaishan Au deposit. The objectives are to determine the ages of mineralization and igneous rocks, reveal the nature, source, and evolution of the ore-forming fluids, and constrain the origin of the ore-forming materials. Zircon U-Pb dating indicates that the host rhyolitic crystal tuff of the Guanghua Formation formed at (116±2) Ma, and the diorite porphyry dyke at (114±2) Ma. Fluid inclusion studies show that only aqueous two-phase (liquid-rich) fluid inclusions are present, and the ore-forming fluid is a medium-low temperature, low-salinity H2O-NaCl system. H-O-S-Pb isotopes suggest that the ore-forming materials were magmatic in origin, and the ore-forming fluids were predominantly derived from meteoric water. Pyrite from the mineralization stage has low Co and Ni contents with Co/Ni ratios < 1, indicating a medium-low temperature environment and a principal source of metals from the Guanghua Formation host rocks. Fluid cooling was the main mechanism for gold precipitation. The Tianwangtaishan Au deposit is classified as a low-sulfidation epithermal Au deposit.

Key words: mineralization age, fluid inclusion, H-O-Pb-S isotopes, trace element analysis of pyrite, Tianwangtaishan Au deposit, northern Great Xing’an Range

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