| 大兴安岭北部十五里桥金矿床流体包裹体特征及矿床成因 |
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| 引用本文： | 孙彦峰,周传芳,王久懿,梁中恺,姜平,杜海双.大兴安岭北部十五里桥金矿床流体包裹体特征及矿床成因[J].地质与资源,2022,31(5):606-613. |
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| 作者姓名： | 孙彦峰 周传芳 王久懿 梁中恺 姜平 杜海双 |
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| 作者单位： | 中国地质调查局 哈尔滨自然资源综合调查中心，黑龙江 哈尔滨 150086 |
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| 基金项目： | 中国地质调查局项目“黑龙江省大兴安岭十五里桥、腰站林场、依西肯幅、开库康、下鱼亮子、绥安站、瓦干、闰王店岛、双合站1∶5万综合地质调查”（编号12120115041801），“大兴安岭山区生态地质调查”（编号DD20191014） |
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| 摘 要： | 十五里桥金矿床位于上黑龙江Au（Cu-Mo）成矿带内，上黑龙江盆地南缘、腰站断陷北缘与二十二站隆起南缘交接地带. 矿床可划分为4个成矿阶段：Ⅰ—脉状黄铁矿-石英阶段；Ⅱ—浸染状黄铁矿±黄铜矿-石英阶段；Ⅲ—浸染状黄铁矿±黄铜矿±闪锌矿±方铅矿-石英阶段；Ⅳ—少硫化物-碳酸盐阶段. 其中多金属硫化物-石英阶段为主成矿阶段. 流体包裹体研究表明，Ⅱ、Ⅲ阶段发育富气相和富液相型流体包裹体，Ⅱ阶段流体发生不混溶，均一温度介于283~394 ℃之间，盐度介于2.56%~7.99%（NaCl当量，质量分数）之间；Ⅲ阶段均一温度介于251~298 ℃，盐度介于2.56%~5.09%（NaCl当量，质量分数），属于简单的NaCl-H2O体系. H-O同位素指示成矿流体主要为大气降水；S同位素指示成矿物质主要来自深源岩浆硫. 十五里桥金矿床为火山岩容矿的浅成中温热液型矿床.
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| 关 键 词： | 金矿床 流体包裹体 矿床成因 中温热液型 大兴安岭 |
| 收稿时间： | 2021-10-18 |
FLUID INCLUSION CHARACTERISTICS AND GENESIS OF SHIWULIQIAO GOLD DEPOSIT IN NORTHERN DAXINGANLING MOUNTAINS |
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| SUN Yan-feng,ZHOU Chuan-fang,WANG Jiu-yi,LIANG Zhong-kai,JIANG Ping,DU Hai-shuang.FLUID INCLUSION CHARACTERISTICS AND GENESIS OF SHIWULIQIAO GOLD DEPOSIT IN NORTHERN DAXINGANLING MOUNTAINS[J].Geology and Resources,2022,31(5):606-613. |
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| Authors: | SUN Yan-feng ZHOU Chuan-fang WANG Jiu-yi LIANG Zhong-kai JIANG Ping DU Hai-shuang |
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| Institution: | Harbin Natural Resources Comprehensive Survey Center, CGS, Harbin 150086, China |
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| Abstract: | The Shiwuliqiao gold deposit is located in the junction zone between the southern margin of Upper Heilongjiang Basin, the northern margin of Yaozhan fault depression and the southern margin of Ershierzhan uplift within the Upper Heilongjiang Au-Cu-Mo metallogenic belt. The metallogenesis of the deposit can be divided into four stages, i.e. I) vein pyrite-quartz stage, Ⅱ) disseminated pyrite±chalcopyrite-quartz stage, Ⅲ) disseminated pyrite±chalcopyrite±sphalerite±galena-quartz stage and IV) low sulfide-carbonate stage, among which the polymetallic sulfide-quartz is the main metallogenic stage. The study of fluid inclusions shows that gas-rich and liquid-rich fluid inclusions are developed in stages Ⅱ and Ⅲ. The fluid in stage Ⅱ is immiscible, with the homogenization temperature of 283-394 ℃ and salinity of 2.56%-7.99%, while the homogenization temperature in stage Ⅲ is 251-298 ℃ with the salinity of 2.56%-5.09%, belonging to simple NaCl-H2O system. The H-O isotope indicates that the ore-forming fluid is dominated by atmospheric precipitation, and the S isotope suggests that the metallogenic materials mainly come from deep magmatic sulfur. The Shiwuliqiao gold deposit is of volcanic rock-hosted epi-mesothermal type. |
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| Keywords: | gold deposit fluid inclusion deposit genesis mesothermal type Daxinganling Mountains |
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