摘要
那哥铜多金属矿床位于江南造山带西南段,赋矿地层为青白口系甲路组和乌叶组,矿体产于近东西向的F2断裂破碎带中,呈脉状和透镜状产出。矿石矿物主要为方铅矿、黄铜矿、黄铁矿和闪锌矿,脉石矿物为石英、绢云母、白云母、方解石、绿泥石等。通过采集与成矿同期的白云母样品进行Ar-Ar年龄测定,结果表明成矿年龄为413 Ma,说明那哥铜多金属矿床成矿作用发生于加里东期,成矿作用与区内所谓的地幔柱活动无直接的成因关系。
Nage Copper Polymetal Deposit is situated in southwestern section of Jiangnan Orogeny. The ore is hosted by Jialu Formation and Wuye Formation of Qingbaikou System and the ore bodies which are veindeposit shaped and lense-shaped, are controlled by nearly east-west trending F2 fracturing zone. The ore mineralogy is characterized by galena, chalcopyrite, pyrite, and sphalerite and the gangue mineralogy is characterized by quartz, sericite, muscovite, calcite, and chlorite. Muscovite samples formed during mineralization are carefully collected in the No. 1 ore body of Nage Deposit to conduct the mineralization age by Ar-Ar isotopic method. The muscovite 40Ar/39Ar plateau age and 40Ar/39Ar isochron age are highly consistent, which are 412.96±1.96 Ma and 412.68 ± 2.22 Ma, respectively. The muscovite Ar-Ar age means that Nage Copper Polymetal Deposit is formed in the Caledonian Period and has no direct genetic relation to Neoproterozoic mantle plumes activity in the region.
出处
《贵州大学学报（自然科学版）》
2013年第5期27-30,65,共5页
Journal of Guizhou University:Natural Sciences
基金
贵州省国土资源厅地勘基金项目(2008)
