塔吉克斯坦上库马尔克金矿床地质特征及EH-4勘查技术应用

Geological features and EH-4 exploration technology of the Shankumaerke gold deposit,Tajikistan

上库马尔克金矿床位于中塔吉克斯坦贵金属成矿带内,成矿控矿地质条件和地球物理特征表明,矿体受断裂构造控制明显,时空上与区域发育的古生界浅变质沉积岩系有关,是中亚成矿域最典型矿床类型之一。矿床在20世纪60~80年代经历了一系列地质找矿勘查工作,发现了较好的矿化线索,显示了巨大的找矿潜力。但是,前人找矿勘探工作基本在地表至地下300 m以浅范围,矿化带向深部继续延伸。对此,通过地球物理勘查方法试验,本区深部找矿开展了音频大地电磁测深（EH-4）应用技术研究,大致了解测区1 000 m以浅深度范围内的宏观地质特征,总结了以EH-4方法为主的找矿标志,并圈定了找矿有利区段,对本区深部找矿工作具有重要的指导意义。

The Shangkumaerke gold deposit is one of the most typical ore deposits in the Central Asian metallogenic domain,and lies in the precious metal metallogenic belt in the middle part of Tajikistan. Metallogenic ore-controlling geological conditions and geophysical characteristics indicate that the orebody is obviously controlled by the structural faults,and is related to the Paleozoic shallow metamorphic sedimentary rock series in time and space. In the 1960 s ~ 1980 s,the deposit finished a series of geological prospecting exploration work,and found some good mineralization clues that showed a great prospecting potential for this deposit. The previous prospecting exploration work mainly focused on the shallow range of earth＇s surface to the depth of 300m; however,the deep mineralization should be continued. In this paper,through the test of the geophysical exploration methods,the authors carried out the research on the EH-4exploration technology of the deep prospecting in this area so as to get a general understanding of the macroscopic geological features within the range of shallow part to the depth of 1 000 m. The authors summarized the ore-prospecting criteria obtained mainly from the EH-4 method,and the prospecting target areas were delineated based on the study. The results obtained by the authors have important guiding significance for the deep prospecting in this area.