甘肃岷县中寨乡、十里铺地区水系沉积物地球化学特征及找矿方向

发布时间：2018-03-24 13:19

  本文选题：中寨乡　切入点：十里铺　出处：《中国地质大学(北京)》2017年硕士论文

【摘要】：甘肃岷县中寨乡、十里铺地区位于秦岭造山带的西段,北接北秦岭加里东造山带和祁连山加里东造山带,南邻松潘-甘孜印支造山带,是重要的成矿带之一。矿区内具有较好的成矿地质背景,化探异常强度高。本文在对前人资料收集和分析的基础上,通过野外区域地质矿产调查及室内的综合研究,对岷县中寨乡、十里铺地区区域地质情况、水系沉积物地球化学特征等进行了全面的研究,得出以下几点结论:(1)利用1:50000水系沉积物测量方法对矿区展开全面的地球化学工作,对工作区17种元素在不同地质体中的分布形式、元素组合形式、元素富集与分散规律进行了分析研究。本文查明了工作区元素富集离散特征及地球化学空间分布规律,指出了本区的主要成矿元素为Au、Sb、As、Ag、Hg。共圈定水系沉积物单元素异常98处,组合异常27处,综合异常9处,其中甲类综合异常1个,乙类综合异常4个,丙类综合异常4个。并对所有甲、乙类综合异常及部分丙类综合异常进行了解释推断。(2)根据本区地质特征,结合化探异常初步探讨了研究区成矿前景,初步划定了元山沟-扎马沟等4处找矿靶区及4处成矿远景区。1处A级找矿靶区(摇路坝-坞麻桥),2处B级找矿靶区(元山沟-扎马沟、窑沟),1处C级找矿靶区(西沟-草坪梁)。4个成矿远景区即元山沟-扎马沟锑、汞、砷、铜Ⅱ成矿远景区、西沟-草坪梁汞、银Ⅲ级成矿远景区、窑沟金、锑Ⅱ级成矿远景区、摇路坝-坞麻桥金、锑、汞、砷Ⅰ级成矿远景区。
[Abstract]:Zhongzhai Township, Minxian County, Gansu Province, the Shilipu area is located in the western part of the Qinling orogenic belt, the Caledonian orogenic belt in the north Qinling Mountains and the Caledonian orogenic belt in the Qilian Mountains, and the Songpan-Ganzi Indosinian orogenic belt in the south. It is one of the important metallogenic belts. There is a good metallogenic geological background and high intensity of geochemical anomaly in the mining area. Based on the collection and analysis of the previous data, the field regional geological and mineral resources investigation and indoor comprehensive study are carried out in this paper. A comprehensive study of the regional geological conditions and geochemical characteristics of water system sediments in Zhongzhaixiang, Shilipu area, Minxian County has been carried out, and the following conclusions have been drawn: (1: 50 000) the geochemical work of the mining area is carried out by using the 1: 50000 water system sediment survey method. The distribution forms of 17 elements in different geological bodies, the forms of element assemblage, the law of element enrichment and dispersion are analyzed and studied. The discrete characteristics of element enrichment and geochemical spatial distribution in the working area are found out in this paper. It is pointed out that the main ore-forming elements in this area are Auto-SbSbAg-Ag-Hg.There are 98 single element anomalies, 27 assemblage anomalies and 9 comprehensive anomalies in the sediments of the drainage system, of which 1 is a comprehensive anomaly and 4 are a type B comprehensive anomaly. Based on the geological characteristics of the study area, the metallogenic prospect of the study area is preliminarily discussed according to the geological characteristics of the study area. Four ore-prospecting target areas such as Yuanshangou and Zamagou, and 4 ore-forming scenic spots, .1 A-grade prospecting targets (2 B-grade prospecting target areas (Yuanshangou-Zamagou) in Yoluoba-Wumaqiao area, etc., have been preliminarily delineated, and 4 ore prospecting targets (Yuanshangou-Zamagou) have been preliminarily delineated. One C-grade prospecting target area (Xigou-Laogliang). Four metallogenic areas, namely, Yuanshangou-Zamagou antimony, mercury, arsenic, copper 鈪，

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