山东张里金矿床控矿条件与找矿靶区预测

Ore-controlling condition and prospecting target prediction of Zhangli gold deposit in Shangdong province

通过对张里金矿床控矿地质条件调查与分析研究,认为丁家庄段泥云岩对金的富集沉淀起到了一定的作用,是成矿的有利层位;次级萤子洼断裂控制着碱性岩盖-岩床的分布,并与SW向断裂交汇部位控制着含金隐爆角砾岩构造,是金矿成矿的重要构造条件;次火山相碱性角闪二长斑岩、粗面斑岩质隐爆角砾岩是金矿成矿与找矿重要的岩浆岩条件。通过提取综合找矿标志,开展了靶区和隐伏矿体预测工作,圈定A类靶区4处,B类靶区6处,C类靶区2处。

Based on ore-controlling geological condition survey and analysis in Zhangli gold deposit,it is found that the argillaceous dolomite in Dingjiazhang group contributes to the enrichment and settlement of gold and it is a favorable bed in ore-forming process;Yingziwa sub-abruption controls the distribution of alkaline laccolite and deck,its convergence area with SW abruption also controls the cryptoexplosive breccia,which is an important tectonic setting for gold mineralization;subvolcanic alkalitrophy ivernite and trachyte porphyry cryptoexplosive breccia are important magmatite factors to gold deposit＇s formation and exploration.By extracting the comprehensive ore-prospecting criteria,the prospecting targets and concealed orebodies are forecast in the area,4 A-type target areas,6 B-type target areas and 2 C-type target areas are delineated.