胶西北前孙家-洼孙家断裂带构造地球化学找矿预测  

Tectono-geochemical prospecting prediction of Qiansunjia-Wasunjia fault in northwest of Jiaodong

作　　者：祝涛[1] 杨斌[1] 

机构地区：[1]中南大学有色金属成矿预测教育部重点实验室,中南大学地球科学与信息物理学院

出　　处：《黄金》2016年第1期9-13,共5页Gold

基　　金：国家科技支撑计划资助项目(2006BAB01B07);973计划前期研究专项课题(2007CB416608)

摘　　要：马虎沟测区位于灵北断裂带下盘,区内主干断裂为前孙家—洼孙家断裂,发育似斑状郭家岭型花岗闪长岩和玲珑型片麻状黑云母花岗岩。本次地表构造地球化学测量范围约15 km2,采集构造地球化学样品共858件,测试元素包括Au、Ni、Pb、Co、Mo、Sn、Zn、Ti、Cr、As、Sb、Hg、Ag、Cu、Ba、Bi、B、Mn、V等19种。Au元素异常沿前孙家—洼孙家断裂带及次级断裂分布特征明显。分形分维统计表明,Au具有多阶段成矿的特征。结合多元统计分析,厘定本测区构造地球化学异常找矿标志为Au-Pb-Bi元素组合异常及因子得分Y(i,2)和Y(i,3)异常。结合地质分析,圈定找矿靶区5处。The Mahugou survey area is located in the footwall of Lingbei fault zone where the major fault is Qiansunjia-Wasunjia fault and Guojialing type porphyraceous granodiorite and Linglong type gneissic biotite granite develop. During the measurement of tectonic geochemistry on the surface,858 samples were collected in the area of about15 km2 and 19 elements were tested including Au,Ni,Pb,Co,Mo,Sn,Zn,Ti,Cr,As,Sb,Hg,Ag,Cu,Ba,Bi,B,Mn and V. Au anomaly distributed mainly along Qiansunjia-Wasunjia fault and its secondary faults. Fractal dimension statistics showed the area is characterized by a multiple phase gold mineralization feature. Au-Pb-Bi combination anomalies and factor score anomalies of Y（ i,2）,Y（ i,3） were determined as tectonogeochemical prospecting indicators.Five prospecting targets were delineated based on the information of geology.

关 键 词：找矿预测 构造地球化学 多元统计分析 前孙家—洼孙家断裂带 

分 类 号：TD15[矿业工程—矿山地质测量] P618.51[天文地球—矿床学]