甘肃省肃北县红石头沟化探异常及“三位一体”找矿预测  

Geochemical anomaly and “Trinity” prospecting prediction of Hongshitougou area,Gansu province

作　　者：潘中奎 王滔 PAN Zhong-kui;WANG Tao(Third Institute Geological and Mineral Exploration of Gansu Provincial Bureau of Geology and Mineral Rosources,Lanzhou 730050)

机构地区：[1]甘肃省地质矿产勘查开发局第三地质矿产勘查院

出　　处：《矿产勘查》2019年第6期1435-1443,共9页Mineral Exploration

摘　　要：在祁连西段的大泉-黑刺沟一带开展1∶5万矿产远景调查时,圈定了一处W、Sn、Bi综合异常,通过查证,发现了红石头沟钨矿点。圈出白钨矿化带两条,其中一条长度大于1200m,平均厚度2.20m,WO3平均品位0.32%,含矿岩性主要为北大河岩群b岩组的矽卡岩化大理岩。利用"三位一体"找矿理论进行分析认为,矿点北侧中酸性岩体为成矿提供了良好的物质来源及热动力条件,是成矿地质体,断层构造、侵入接触带和岩性接触面(硅/钙面)是主要的成矿构造和成矿结构面,成矿作用为岩浆热液接触交代作用。红石头沟钨矿点成矿地质条件较好,具有良好的找矿前景,异常北侧北大河岩群与花岗岩体接触部位具有找矿潜力。When carrying out a prospective survey of 1∶50,000 minerals in the Daquan-Heicigou area of western Qilian,a comprehensive anomaly of W,Sn and Bi was delineated.By verifying,Hongshitougou tungsten ore poine was found,and cirlieing two scheelite mineralization belts,one of them is more than 1200 m long and has an average thickness of 2.20 m,the WO3 grade is 0.078%-2.39%,and the ore-bearing lithology is mainly skarnized marble of Beidahe rock group b petrofabric.According to the"trinity"prospecting theory,the intermediate-acid rock mass in the north of the ore poine provides a good material source and thermodynamic conditions for mineralization,being the metallogenic geological body,faults,intrusive contact and Lithologic interface(silica-calcium plane)are the main metallogenic tectonics and structural planes,mineralization is contact metasomatism.Hongshitougou metallogenic geological conditions are good and have well prospecting prospects,the contact area between Beidahe Group and intermediate-acid rock mass on the north side of the anomaly has prospecting potential.

关 键 词：水系沉积物测量综合异常 矽卡岩化大理岩 “三位一体”找矿理论 红石头沟钨矿点 甘肃肃北 

分 类 号：P622[天文地球—地质矿产勘探] P632[天文地球—地质学]