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 Qian-sunjia-Wasunjia fault and Guojialing type porphyraceous granodiorite and Linglong type gneissic biotite granite devel-op. During the measurement of tectonic geochemistry on the surface,858 samples were collected in the area of about 15 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 a-nomalies 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.
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