| 龙灵利,王京彬,王玉往,孙志远,赵路通,石煜.东天山寨北山热液脉状铜矿地质特征、成矿时代及矿床成因初探[J].矿产勘查,2018,9(12):2282-2291 |
| 东天山寨北山热液脉状铜矿地质特征、成矿时代及矿床成因初探 |
| Geological characteristics, metallogenic age of hydrothermal vein-type copper deposit, Zhaibeishan, eastern Tianshan, Xinjiang and discussion of the deposit genesis |
| 投稿时间：2018-10-15 |
| DOI： |
| 中文关键词: 东天山 寨北山铜矿床 Re-Os同位素年龄 硫-氢-氧同位素 火山-次火山热液型 |
| 英文关键词: Eastern Tianshan,Zhaibeishan copper deposit, Re-Os isotope age, sulfur-oxygen-hydrogen isotope, volcanic-subvolcanic hydrothermal type |
| 基金项目:国家重点基础发展研究计划项目(编号:2014CB440803)资助。 |
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| 中文摘要: |
| 寨北山铜矿位于东天山阿奇山-雅满苏成矿带的东段。矿体主要赋存于早石炭世玄武安山玢岩中,受断裂构造控制明显。矿石以脉状、浸染状构造为主,矿石矿物主要为黄铜矿,黄铁矿较少。围岩蚀变较弱,分带性不明显。获得矿区黄铁矿Re-Os同位素模式年龄为337.9 ±5.7 Ma,表明该矿床形成于早石炭世。矿区硫化物硫同位素δ34S值介于-1.4‰～-7.2‰之间,接近于幔源硫值；矿石石英中δD值为-105.6‰~-96.4‰,δ18O值为0.3‰~3.2‰,反映成矿流体主要来自岩浆。综合研究认为寨北山铜矿可能为一火山-次火山热液型矿床。 |
| 英文摘要: |
| The Zhaibeishan copper deposit is located in eastern part of the Aqishan-Yamansu metallogenic belt in eastern Tianshan. The orebodies of this deposit are mainly hosted in the basalitic of the andesite porphyrite of the Lower Carboniferous, and they are obviously controlled by fault structure. The ore is dominated by the vein and disseminated structures. Ore minerals are mainly chalcopyrite, and the pyrite is less. Wall-rock alteration is generally weak and the alteration zoning is not obvious. The Re-Os isotope age of 337.9±5.7Ma was obtained, and it indicates that this deposit was formed in the Early Carboniferous. The δ34S value of sulfide in ore district is 1.4‰～-7.2‰, which are close to the commonly assumed value for mantle sulfur. The δD value of quarts is -105.6‰~-96.4‰ and the δ18O value of quarts is 0.3‰~3.2‰ from the quart sulfide veins, which indicate that ore-forming fluids mainly come from the magma. Comprehensive study suggests that the Zhaibeishan copper deposit is a volcanic-subvolcanic hydrothermal type deposit. |
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