| 新疆阿克塔斯金矿床黑云母花岗岩锆石U-Pb和绢云母39Ar/40Ar测年及地质意义 |
| Received:October 27, 2018 Revised:January 21, 2019 点此下载全文 |
| 引用本文：WEI XiaoFeng,PAN Dong,YIN YuanJun,LIAO Zhen,LÜ XiaoQiang,SHAN LiHua,DING RuFu.2019.Zircon U-Pb age of biotite granite and 39Ar/40Ar age of sericite from Aketasi gold deposit in Xinjiang,and their geological significance[J].Mineral Deposits,38(2):251~260 |
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| Author Name | Affiliation | | WEI XiaoFeng | Beijing Institute of Geology for Mineral Resources, Beijing 100012, China | | PAN Dong | China Non-ferrous Metals Resource Geological Survey, Beijing 100012, China | | YIN YuanJun | Sinotech Minerals Exploration Co., Ltd., Beijing 100012, China | | LIAO Zhen | Sinotech Minerals Exploration Co., Ltd., Beijing 100012, China | | LÜ XiaoQiang | China Non-ferrous Metals Resource Geological Survey, Beijing 100012, China | | SHAN LiHua | China Non-ferrous Metals Resource Geological Survey, Beijing 100012, China | | DING RuFu | China Non-ferrous Metals Resource Geological Survey, Beijing 100012, China |
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| 基金项目:十二五国家科技支撑计划项目（编号：2011BA06B00）和新疆地勘基金项目（编号：AL16-2-LQ08）联合资助 |
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| 中文摘要:阿克塔斯金矿床位于新疆阿尔泰造山带南缘，矿体赋存于黑云母花岗岩与中泥盆统北塔山组中性火山岩接触带，矿石类型主要为石英脉型和蚀变岩型。矿区中酸性侵入岩体的岩石类型为二长花岗岩、黑云母花岗岩。近矿的黑云母花岗岩LA-ICP-MS锆石U-Pb年龄为（329.5±1.8） Ma，成岩时代为早石炭世；主成矿期的金-黄铁矿-石英细脉中的绢云母40Ar/39Ar坪年龄为（247.7±1.3） Ma、等时线年龄为（245.1±1.4） Ma，成矿时代为早三叠世。研究表明，阿克塔斯金矿成岩与成矿时代相距80 Ma，为碰撞造山和后碰撞造山不同地质作用的产物。该矿床具有造山型金矿的特点，额尔齐斯断裂带的右形剪切走滑作用控制金矿成矿过程。 |
| 中文关键词:地球化学 锆石 U-Pb 测年 绢云母 40Ar-39Ar 测年 阿克塔斯金矿 阿尔泰造山带 |
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| Zircon U-Pb age of biotite granite and 39Ar/40Ar age of sericite from Aketasi gold deposit in Xinjiang,and their geological significance |
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| Abstract:The Aketasi gold deposit is located on the southern margin of the Altay orogenic belt. Gold orebodies are mainly hosted in the contact zone between the biotite granite and the middle Devonian Beitashan Formation volcanic rock. The main ore types are quartz vein type and altered rock type. The lithology of the Aketasi rocks is mainly composed of monzonitic granite and biotite granite. The age of U-Pb dating of zircon from the biotite granite is(329.5±1.8)Ma, demonstrating that the petrogenetic age is early Carboniferous. The39Ar/40Ar age of sericite which is coexistent with that of gold, pyrite and quartz veinlets at the main metallogenic stage shows the plateau age of(247.7±1.3)Ma, and isochronal age of(245.1±1.4)Ma, implying that the metallogenic age is Early Triassic. Studies show that the difference between petrogenesis age and mineralization age of the Aktas gold deposit is 80 Ma, suggesting products of different geological processes of collision orogeny and post-collision orogeny. The deposit has the characteristics of orogenic gold deposit and the ore-forming process was controlled by the right-shaped shear strike-slip of the Irtysh fault zone |
| keywords:geochemistry zircon U-Pb dating sericite40Ar/39Ar dating Aketasi gold deposit Altay orogenic belt |
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