内蒙古额济纳旗蓬勃山地区金及多金属成矿地质条件及找矿远景

额济纳旗蓬勃山地区为中国西北地区一处重要的金及多金属矿集中区,具有良好的找矿前景.研究区金及多金属成矿受地层-构造-岩浆活动三重条件控制.古元古界北山群、中奥陶统咸水湖组、下石炭统白山组、下二叠统双堡塘组具有形成金、银、铅(锌)、钨等矿产良好的地球化学条件.金及多金属矿产的产出与区域上中酸性侵入岩体具有明显的空间分布关系.矿床的形成时代与晚古生代岩浆活动具有明显的耦合关系.区内北西向、北东向断裂构造对矿产的产出具有明显的控制作用.指出了该区今后的找矿方向.

ORE-FORMING GEOLOGICAL CONDITIONS AND ORE PROSPECTS OF THE GOLD AND POLYMETALLIC DEPOSITS IN THE PENGBOSHAN AREA,INNER MONGOLIA

Pengboshan area is an important gold and polymetallic metallogenic belt in Northwest China, where gold and polymetallic mineralization is controlled by strata, structures and magmatism. Analysis shows that the Paleoproterozoic Beishan Group, Middle Ordovician Xianshuihu Formation, Lower Carboniferous Baishan Formation and Lower Permian Shuangbaotang Formation have favorable geochemical conditions for the forming of gold, silver, lead （zinc）, tungsten and other minerals. The spatial distribution of the gold and polymetallie deposits is obviously related to that of the acidicintermediate intrusive rocks in this area. The mineralization time is consistent with the Late Paleozoic magmatism. The NWNE trending faults control the occurrence of the deposits. Accordingly, the direction for future exploration in the area is pointed out.