中蒙边境阿巴嘎段铅锌矿集区地质特征和找矿思路

Geological characteristics and ore-prospecting line of thinking of the Abag ore concentration area along the Sino-Mongolian Border

中蒙边境阿巴嘎段位于内蒙古二连—东乌旗铜多金属成矿带上,近年来在该地区通过综合找矿方法相继在哈达特陶勒盖、莫若格钦、高尔旗、甘珠尔善德、阿扎哈达等地发现了一批以铅锌矿为主,伴生银的小型-中型中温脉状热液型矿床,确立了阿巴嘎旗北部铅锌矿集区的重要地位。本文对区域的和矿集区内的地质、地球物理、地球化学特征进行了归纳,结合矿集区内高尔旗、哈达特陶勒盖两个典型铅锌(银)矿床实例对该类矿床成矿特征进行了介绍,并从矿体赋存空间的角度得出该类矿床是受层(泥鳅河组地层)、位(断裂构造部位)共同作用的结果。最后根据该类矿床发现过程和成矿特点,提出了适合本区的找矿思路。

The Abag Pb-Zn ore concentration area near the Sino-Mongolian border belongs to the Erenhot- Dong Ujimqin Banner copper-polymetallic ore belt. A series of Pb-Zn mesothermal deposits, such as Hadatetaolegai, Moruogeqing, Gaoerqi, Ganzhuershande and Azhahada, were recently found in this area by synthetic prospecting methods. The achievements acquired have established the Abag Pb-Zn ore concentration area as an important Pb-Zn resource district. This paper sums up features of geology, physical geography and geochemistry in the study area and describes characteristics of this kind of ore deposits with two typical Pb-Zn deposits of Gaoerqi and Hadatetaolegai as examples. Some conclusions have been reached from the angle of the spatial occurrence of the Pb-Zn ore body that this type of Pb-Zn deposits resulted from the joint action of the strata （Niqiuhe Formation） and structure location thinking in search for this kind of Pb-Zn det^osits （faulted structure）. In the end, this paper provides the line of