康定长岩窝金矿矿床成因分析毕业论文.doc

康定长岩窝金矿矿床成因分析 作者姓名: 专业班级 指导教师： 摘 要 四川省甘孜藏族自治州康定县矿区位于扬子准地台和松潘－甘孜地槽褶皱系两个级大地构造单元的接合部、道孚－康定三岔裂谷系的中心，也是南北向安宁河深断裂、北西向鲜水河深断裂、北东向茂汶深断裂和北川－映秀深断裂四大断裂带的交汇处。于“康定杂岩”西缘的志留系沉积盖层中。晚太古－晚元古界康定杂岩bstract The genesis of Changyanwo is a Small-scale gold deposit at Kangding County, Ganzi Tibetan Autonomous Prefecture in Sichuan Province,there are three Mining areas ,Shiziyan Changyanwo and shuangniupeng. The deposit is a quartz vein-type gold deposits, the ore mainly occurs in quartz veins，it roughly the east-west，it is controlled by faults; The mine is located in two tectonic units of grade Ⅰ a juncture is the Yangtze platform and the quasi-Songpan - Ganzi geosyncline fold system, the center of the Daofu - Kangding trigeminal rift system, the NS at Anling River deep fracture，NW at Xianshuihe deep fracture，NE at Maowen deep fracture and the Beichuang -- Yingxiu deep fracture，so The mine is located in the intersection of the four faults. The mine is exposed in the sedimentary cover layer of silurian-carboniferous in the western Kangding Melange .Deposits are occured in the late Archean - late Proterozoic metamorphic rocks, Which are frequently invaded by granites of different ages, The granitoids in Yanshan of the Mesozoic is the most important. The water-bearing minerals and carbonate rocks in rocks are occurred dehydration and decarbonization form fluids with the mixture meteoric water formed the high-temperature fluid. movemented by shear zone, and jailer took the Ore-forming materials as Au, Sb, As, Bi, S and so on from the surrounding rock, formed ore-forming fluids by gold-bearing. So that the endogenous gold and other in mining area ore-forming elements by the power, heat and ductile shearing are occurred to activation, migration and initial mineralization; In the later wall-rock alteration effect , the golden of the country rock was jailer took further, activation, migration and enrichment, As temperature and pressure decreased very Poly. the golden form the gol