烟台市张家金矿地质特征及外围找矿方向分析

烟台市张家金矿位于张家断裂金成矿带上,该断裂位于胶北断隆东部,走向NNE,与招平断裂近平行,在其主断面下部发育较大规模的黄铁矿化绢英岩带。1993年山东省第八地质队在北张家发现并勘探1个中型金矿体。自2008年至今在王坡顶、陈家沟等地的金矿普查中发现,除主断面外,主断裂西300～400m发育近平行的构造绢英岩蚀变带,探槽取样Au最高品位7.29g/t,钻孔取样Au最高品位22.50g/t。主要根据张家金矿地质特点,结合该区基础地质工作,简要分析张家断裂Au的矿化、赋存状态,探讨该区找矿方向。

Characteristics and Peripheral Prospecting Direction of Zhangjia Gold Deposit in Yantai City

Zhangjia gold deposit locates in gold mineralization belt in Zhangjia fault belt in Yantai city.This fault locates in east part of Jiaobei faulted uplift with the trend of NNE.It is nearly parallel with Zhaoping fault belt.Large scale pyritization with phyllic belt has been developed in the main section of the lower part.A medium size gold ore body has been found in Zhangjia fault in 1993 by No.8 Geological Team of Shandong Bureau of Geology and Mineral Resources.In the gold exploration in Wangpoding and Chenjiagou areas since 2008,in addition to the main section,nearly parallel tectonic phyllic alteration zone developed in the depth of 300～400m in west part of the main sections.The highest grade of Au is 7.29g/t by reench sampling result,and the highest grade of Au is 22.50g/t by drilling sampling result.According to geological characteristics of Zhangjia gold deposit,and combining with basic geological work in this area,mineralization,occurrence and explorationg direction of Au in Zhangjia fault belt have been introduced briefly.