陕西国安寺-白杨沟地区金矿成矿地质条件及找矿潜力分析

Analysis on the Metallogenic Condition of Gold Deposit and Ore Prospecting Potential in Guoansi-Baiyanggou Area,Shanxi Province

国安寺-白杨沟地区所在凤太矿集区大地构造位于华北板块与扬子板块的夹持部位,成矿区划上处于秦岭泥盆系金-多金属成矿带中段。凤太海盆沉积基底火山岩及变质火山岩中丰富的成矿物质,为区内金属矿产的形成提供了大量的物质来源。此外,区内地壳构造活动强烈,为热液的运移、成矿物质的活化及迁移提供了动力学条件,伴随地壳活动产生的各种断裂构造为成矿物质的运移提供了通道、也为成矿物质的聚集和保存提供了有利的空间。笔者结合野外实际情况,在分析对比凤太矿集区已知金矿床的成矿环境和控矿要素的基础上,通过综合研究该区成矿地质背景、地质特征和地球化学资料,对该区进行找矿潜力分析,认为该区有较好的找金前景。

The tectonic structure of the Fengxian-Taibai Ore Cluster in Guoansi-Baiyanggou area in Shannxi province, is located in the damping part of the north china plate and Yangtze plate, with metallogenic zoning in the middle part of the Qinling gold polymetallic belt in the Devonian. The rich ore-forming materials in the volcanic rocks and metamorphic volcanic rocks at the bottom of Fengxian-Taibai sea basin offer a wide range of source materials for the formation of the gold mineral. In addition, the strong tectonic activities in the area provide dynamic conditions for the migration of hydrothermal fluid and activation of ore-forming materials. All kinds of fracture structures along with the earth＇ s crust activity provided channels for the migration of ore-forming materials, also provide a favourble space for the congregation and conserve of metallogenic materials. In view of the practical work in this area, and on the basis of analyzing the known metallogenic environment and ore controlling factors of Fengxian-Taibai mineral cluster, and comprehensive study of the regional mineralization geological background, geological characteristics and geochemical information, prospecting potential for exploration of gold deposit in this area is analyzed with favorable conclusion.