| 甘肃阳山金矿带构造岩浆演化与金矿成矿 |
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| 引用本文： | 齐金忠,杨贵才,罗锡明.甘肃阳山金矿带构造岩浆演化与金矿成矿[J].现代地质,2006,20(4):564-572. |
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| 作者姓名： | 齐金忠 杨贵才 罗锡明 |
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| 作者单位： | 1. 中国人民武装警察部队,黄金地质研究所,河北,廊坊,065000
2. 中国地质大学,海洋学院,北京,100083 |
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| 基金项目： | 武警黄金指挥部科研项目(HJ04-01) |
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| 摘 要： | 甘肃阳山金矿带位于西秦岭南部,结合同位素测年资料发现阳山金矿区在侏罗纪早期、白垩纪早期及第三纪早期曾发生3期岩浆活动;稳定同位素分析结果显示,矿石中石英的流体包裹体δD值为-75‰~-56‰,1δ8OH2O为3.7‰~12.2‰,矿脉中黄铁矿及辉锑矿的3δ4S为-2.2‰~-0.7‰,表明阳山金矿成矿热液及成矿物质主要来自于岩浆作用;构造变形分析显示该区在三叠纪曾发生韧性变形,在侏罗纪早期产生韧—脆性变形;侏罗纪晚期以后区内构造转为脆性,早期以逆冲推覆构造为主,晚期主要为脆性伸展活动。结合该区地质构造演化史认为本区的3期岩浆活动与区域伸展作用有关,而与岩浆侵入有关的多期岩浆热液活动是促成阳山金矿床形成的主要因素。
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| 关 键 词： | 阳山金矿 构造演化 岩浆—热液活动 金成矿作用 甘肃 |
| 文章编号： | 1000-8527(2006)04-0564-09 |
| 收稿时间： | 04 3 2006 12:00AM |
| 修稿时间： | 08 5 2006 12:00AM |
Tectonic-Magmatic Evolution and Gold Mineralization in Yangshan Gold Belt,Gansu Province, China |
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| QI Jin-zhong,YANG Gui-cai,LUO Xi-ming.Tectonic-Magmatic Evolution and Gold Mineralization in Yangshan Gold Belt,Gansu Province, China[J].Geoscience——Journal of Graduate School,China University of Geosciences,2006,20(4):564-572. |
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| Authors: | QI Jin-zhong YANG Gui-cai LUO Xi-ming |
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| Institution: | 1. Gold Geological Institute of China Armed Police Force, Langfang, Hebei 065000, China; 2. School of Marine Sciences, China University of Geosciences, Beijing 100083, China |
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| Abstract: | Yangshan gold deposit is located in Wenxian County, Gansu Province.Geochronology study shows that three magmatic-hydrothermal events happened in the ore district respectively in Early Jurassic,Early Cretaceous and Early Tertiary.Stable isotope analysis shows that δD value of fluid inclusions in mineralized quartz veinlet ranges from-75‰ to-56‰,δ~(18)O_(H_2O)value ranges from 3.7‰ to 12.2‰,and δ~(34)S value of pyrite and stibnite ranges from-2.2‰ to-0.7‰,indicating that metallogenic materials and ore fluid are mainly from the magmatic events.Analysis of tectonic deformation indicates that ductile deformation occurred in Triassic Period,ductile-brittle deformation occurred in Early Jurassic,while brittle deformation occurred after Jurassic Period.The brittle deformation experienced early pression period and late tension period.By comparing the tectonic-magmatic events with the regional tectonic evolusion,we propose that the coupling of three magmatic-hydrothermal events affected by regional extension contributed to mineralization of Yangshan gold deposit. |
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| Keywords: | Yangshan gold deposit tectonic evolution magmatic-hydrothermal event gold mineralization Gansu |
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