东天山白山斑岩型钼矿床的地质特征及找矿标志
Geological characteristics and prospecting mark of the Baishan porphyry Mo deposit, East Tianshan
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摘要: 白山钼矿是首次在东天山康古尔韧性剪切带东段南侧的康古尔-土屋-赤湖-黄山成矿带内发现的具有一定规模的斑岩(石英网脉)型钼矿床。该矿床产于下石炭统干墩组(C1g)的黑云母长英质角岩带与花岗斑岩脉内,赋矿岩石主要由含有钾长石-石英细脉、硫化物细脉和长英质角岩组成。钼矿体形态以似层状为主,长100~2000m,平均厚度2.31~43.9m,钼品位变化范围0.030%~0.106%,矿区平均品位0.06%,矿体向深部延深较稳定,厚度大。从内向外可划分出钾长石-石英网脉带、黑云母-石英-钾长石化带、石英-绢云母化带、青盘岩化带4个蚀变带,其中钾长石-石英细网脉极为发育地段形成钼矿体。同时,从地貌、遥感、地球化学、构造、岩石、蚀变6个方面与典型斑岩钼矿床进行了对比,总结了白山钼矿的找矿标志。Abstract: The Baishan Mo deposit is the first porphyry (quartz stockwork) Mo deposit of fairly large magnitude found in the Kanggur-Tuwu-Chihu-Huangshan metallogenic belt on the southern side of the eastern segment of the Kanggur ductile shear zone in the East Tian