五莲县七宝山多金属矿矿化特征及地球物理地球化学特征

Mineralization Characteristics and Geophysical and Geochemical Characteristics of Qibaoshan Polymetallic Deposit in Wulian County

摘要:

五莲县七宝山多金属矿位于五莲胶南成矿带，是山东省重点勘查区和有色金属调查评价区，开展了大量工作，系统总结其多金属矿矿化特征，分析其地球物理、地球化学特征，将为开展外围找矿工作提供参考。通过总结五莲七宝山地区的重力异常特征、航磁异常特征、岩（矿）石物性特征以及地球化学特征，以及对杏山峪和红石岗矿段高精度磁测及激电中梯资料的分析对比，提出七宝山地区低阻、低磁异常带，高低阻过渡带、正负磁异常接触带附近，是找矿的重要地球物理特征标志。地球化学资料显示该区为Cu、Au、Ag等元素构成的近圆形高背景区与七宝山火山机构中心的次火山杂岩体分布范围基本一致，其他异常与已发现的多金属矿床在位置上完全吻合，说明化探异常具有效性。

Abstract:

Qibaoshan polymetallic deposit in Wulian county locates in WulianJiaonan metallogenic belt, which is the key investigation area and nonferrous metal investigation and evaluation area of Shandong province. Through summarizing mineralization characteristics, geophysical characteristics and geochemical characteristics have been analyzed. It will provide some references for carrying out external prospecting work. In this paper, characteristics of gravity anomalies, aeromagnetic anomalies, petrographic characteristics and geochemical characteristics in Qibaoshan area in Wulian county have been introduced. Based on analysis and comparison of highprecision magnetic measurement and the information of the middleladder in Xingshanyu section and Hongshanggang section, it is regarded that low resistance and low magnetic anomaly zones, high and low resistance transition zones, and the vicinity of the positive and negative magnetic anomaly zone are important geophysical characteristic marks for prospecting. As showed by geochemical data, it is regarded that the distribution of Cu, Au, Ag and other elements in the nearcircular high background area is consistent with that of the subvolcanic complex in the center of Qibaoshan volcanic system. Other anomalies are consistent with the discovered polymetallic deposit in the location. It is indicated that geochemical anomalies are effective.