山东日照马家庄钼矿地质、地球化学综合找矿效果及找矿方向

马家庄钼矿为斑岩型钼矿床,位于五莲山凸起内。区域上中生代燕山晚期岩浆岩较为发育,1∶20万水系沉积物测量在该区圈定了以Mo元素为主的多金属组合异常。针对该区地质特征及地球化学景观特征,选择1∶1万土壤地球化学测量对研究区进行了化探扫面;针对圈定的土壤化探异常,选择基岩化探剖面测量进行异常源寻找,进而确定引起异常的直接地质体为望海楼单元细粒二长花岗岩。根据土壤化探异常分布范围,圈定了蚀变岩体范围;根据基岩化探高值分布区域,大致确定了矿化蚀变带范围,共圈定钼矿体12个,较大的矿体有2个。通过地质与地球化学测量的有效结合,大幅度提高了研究区找矿效果。

Geological and geochemical comprehensive prospecting effect and prospecting direction of Majiagou molybdenum deposit in Rizhao, Shandong Province

Majiazhuang molybdenum deposit is a porphyry molybdenum deposit located in Wulianshan uplift. Late Yanshanian magmatic rocks of Mesozoic are well developed in the region. 1/200,000 stream sediment surveys have delineated polymetallic assemblage anomalies dominated by Mo elements in this area. According to the geological and geochemical characteristics of this area, 1/10,000 soil geochemical surveys were selected to carry out geochemical exploration,and then the fine-grained monzonitic granite of Wanghailou unit is determined as the direct geologic body causing the anomaly. According to the distribution range of soil geochemical anomaly, the range of altered rock mass is delineated. According to the distribution of the high value of the bedrock geochemical exploration, the range of mineralization alteration zone is roughly determined, which points out the direction for anomaly checking of construction engineering. Through the effective combination of geological and geochemical surveys, the prospecting effect in this area has been greatly improved.