| 新疆阿希地区金矿概论 |
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| 引用本文： | 毋瑞身,田昌烈,杨芳林,刘海山,贾斌,沙德铭.新疆阿希地区金矿概论[J].地质与资源,1996,5(1):5-21. |
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| 作者姓名： | 毋瑞身 田昌烈 杨芳林 刘海山 贾斌 沙德铭 |
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| 作者单位： | 沈阳地质矿产研究所 |
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| 基金项目： | 本文系新吸维吾尔自治区人民政府国家30 5顶目办公室下达"薪粗伊宁县阿希金矿控矿规林与外圈靶区评价研究"专皿报告的部分凝缩. |
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| 摘 要： | 在新疆伊宁县阿希地区发现的大中型金矿床属于浅成低温热液金矿系统,赋存于晚古生代拉张环境下形成的吐拉苏火山盆地内,三级火山构造分别控制矿带、矿田和矿床.矿床围岩为下石炭统大哈拉军山组中酸性-酸性(偏碱性)陆相火山岩系,成矿时代为早石炭世杜内期,可分成冰长石-绢云母型和硅化岩型.在成矿时代、构造环境上有别于以前确认的浅成低温热液系统,对于扩大找矿领域,推进区域成矿学的研究均具一定意义.
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| 关 键 词： | 新疆 阿希地区 金矿 晚古生代 火山盆地 浅成低温热液 冰长石—绢云母型 硅化岩型 |
| 收稿时间： | 1995-10-25 |
THE OUTLINE OF GOLD DEPOSITS IN AXI AREA, XINJIANG |
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| Wu Ruishen,Tian Changlie,Yang Fanglin Liu Haishan,Jia Bin,Sha Deming.THE OUTLINE OF GOLD DEPOSITS IN AXI AREA, XINJIANG[J].Geology and Resources,1996,5(1):5-21. |
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| Authors: | Wu Ruishen Tian Changlie Yang Fanglin Liu Haishan Jia Bin Sha Deming |
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| Institution: | Shenyang Institute of Geology and Mineral Resources |
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| Abstract: | The gold deposits of Axi area in Yining county of xinjiang indicate those which con trolled by Tulasu volcanic basin in the north part of west Tianshan, including Axi, Xier-mande, Qiabukandangta etc. Based on Caledonides in west Tianshan, the Tulasu volcanic basin was formed in pull-apart environment in Late Palaeozoic, with E-Wextension, the length of 80km and the width of 20km approrimately. The basement of the basin had two lager structure of pre -Sinian crystalline rock series and Lower palaeozoic unmetamorphic sedimentary series. The basin was separated from Yili basin and Sailimu uplifting by thelarge faults on south and north boundaries respectively. The geological body related to gold deposit include continental intermediate -acid volcanic eruptive rock series of Dahalajunshan formation (C1) and corresponding subvolcanic body which belong to calc-alkalic-alkalic series association; sedementary rock of Aqialehe formation (C1) and K-feldspar porphyry rock body (C2). The basin can be divided into three grades volcanic structure; the ist grade is volcanic basin which controlled gold ore belt ;the 2 nd is S-N striking fault belt which controlled gold orefield; the 3rd is volcanic mechanism which controlled gold ore. The main types of gold deposit are as follows: ① adular -sericite type of epithermal system (e.g. Axi) and silicified rock type (e.g. Yiermade); ②porphyry type (e. g. Tawuerbieke);③gold -bearing breccia type. The metallogenic epoch of the 1st type is Early Carboniferous (324.4-338.2 Ma), the adular-sericite type appeared as vein orebody and controlled by volcanic mechanism, and the silicified rock type appeared as plane orebody, with lower grade, far away from volcanic mechanism and controlled by volcanic cycle and rock series.The discovery of Axi and Yiermande etc. gold deposits indicate that important breakthrough in gold ore prospecting have been realized in west Tianshan and mean that a new gold producing base will set up in the west of China. In metallogenic epoch and metallogenic environment, this kind of epithermal gold deposit is different from the former one which oc-cured in Cenozoic island arc area, and also different from the one which occured in Mesozoic superimposed volcanic basin of intraplate crystalline basement in east of China, while similar to the one which occured in volcanic basin of Palaeozoic orogenic belt. Therefore, this paper has great significance in expanding the prospecting area of epithermal deposit and improving the study on regional metallogenics of Eurasian continent. |
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| Keywords: | Xinjiang Axi area gold deposit volcanic basin Late Palaeozoic epithermal adular-sericite type silicified rock type |
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