塔里木盆地西北缘中新生代砂砾岩型铅锌铜矿赋矿层位的时代厘定及意义

Determination of age and its significance of ore- bearing strata of the Meso- Cenozoic glutenite type lead- zinc- copper deposit in the

通过对康苏河、巴什布拉克、乌鲁克恰提、萨热克等实测剖面的岩石组合、含化石特征、地层单元顶底界线、沉积相特征与标准剖面的对比,将萨热克层控砂砾岩型铜矿、乌拉根层控砂砾岩型铅锌矿和花园层控砂岩型铜矿的赋矿层位分别厘定为下侏罗统库孜贡苏组、下白垩统克孜勒苏群和中新统安居安组;综合分析区域地球化学异常、中新生代砂砾岩型铅锌铜矿床的层控矿床特征及其产出层位等,将塔里木盆地西北缘中新生代砂砾岩型铅锌铜矿划分为萨热克层控砂砾岩型铜矿带、乌拉根层控砂砾岩型铅锌矿带和花园层控砂岩型铜矿带。

The ore - bearing strata of the Sareke stratabound glutenite type copper ore deposit, the Wulagen stratabound gluten- ite type lead -zinc ore deposit and the Huayuan stratabound sandstone type copper ore deposit are determined as the lower Jurassic Kuzigongsu Formation, the lower Cretaceous Kezilesu Group and the Miocene Anjuan formation through the comparison of rock assem- blages, fossiliferous characteristics, top and bottom boundaries of stratigraphic unit and sedimentary facies features from the field sur- veyed profiles as Kangsu river, Bashibulake, Wulukeqiati, Sareke profiles with the standard section. Based on the comprehensive anal- ysis of the regional geochemical anomalies, stratabound features of the Meso - Cenozoic glutenite type copper - lead - zinc ore deposits and their strata - bear, the Meso - Cenozoic glutenite type copper - lead - zinc ore deposits located the northwestern margin of the Tarim basin are divided into three mineralization belts, i. e., Sareke stratabound glutenite type copper metallogenic belt, Wulagen stratabound glutenite type lead - zinc metallogenic belt and Huayuan stratabound sandstone type copper metallogenic belt. The study has a significant importance for the guiding prospecting of the Meso - Cenozoic glutenite type copper - lead - zinc ore deposit in the north- western margin area of the Tarim basin.