山东青州王坟地区1∶5万水系沉积物地球化学特征及找矿方向

Geochemical Characteristics and Prospecting Direction of Stream Sediments with the Scale of 1∶50000 in Wangfen Area in Qingzhou City of Shandong Province

摘要:

鲁西近年来陆续发现了多处金及多金属矿床，如沂南铜井、金场，平邑归来庄、磨坊沟，沂源金星头，临朐铁寨等，但对上述地区以外的找矿工作还相对薄弱。王坟地区作为临朐铁寨金银多金属矿区外围地区，具有相似的成矿地质条件。本次研究通过在王坟地区开展的1∶5万水系沉积物测量工作，对其相关成矿元素进行聚类分析、因子分析等地质统计学分析。结果表明，区内Pb、Ag异常规模大，峰值高，富集特征及浓集中心明显，相关元素套合较好。通过地化剖面及探槽工程等手段进行异常查证，所取样品中Pb、Ag等低温热液元素分析结果与异常特征套合较好，本区内沿断裂带找寻Pb、Ag等低温热液元素矿床或矿化体潜力较大。

Abstract:

In recent years, many gold polymetallic deposits have been discovered in western Shandong province, such as Tongjing and Jinchang in Yi'nan county, Guilaizhuang and Tongshi in Pingyi county, Jinxingtou in Yiyuan county, and Tiezhai in Linqu county. However, the prospecting work in sourrounding areas is still relatively weak. As the sourrounding area of Tiezhai gold silver polymetallic mining area in Linqu county, there is similar metallogenic geological conditions in Wangfen area. Through stream sediment survey with the scale of 1 ∶ 50000 in Wangfen area, cluster analysis, factor analysis and other geostatistical analysis of related metallogenic elements have been carried out. It is showed that Pb and Ag anomalies in the area are large in scale, high in peak value, obvious in enrichment characteristics and concentration centers, and good in combination of related elements. Through geochemical profile and trench engineering, the anomaly is verified. The analysis results of Pb, Ag and other low-temperature hydrothermal elements in the samples are well matched with the anomaly characteristics. There is great potential to find Pb, Ag and other low-temperature hydrothermal element deposits or mineralized bodies along the fault zone in this area.