若尔盖—九寨沟裂谷构造与金成矿

THE RUO′ERGAI-JIUZHAIGOU RIFT AND GOLD METALLIZATION

若尔盖—九寨沟地区产有30余处金矿床(点),另有铜、锑、铁等金属矿产;金矿石分石英脉型和微细浸染型,成因类型可分为构造热液型和构造岩浆热液接触交代型。金成矿与裂谷的演化息息相关,金矿主赋于裂谷强烈期的三叠系地层中,分布受裂谷带控制,金矿化具明显的岩性-岩相选择并与一定的围岩蚀变相伴产出。

There are 30 Au deposits（occurrences） and Cu, Sb, Fe etc. mineral resources in Ruo＇ergai-Jiuzhaigou area. Au deposits are of quartz vein type and micro-dissemination type, tectonic hydrothermal and tectonic-magmatic hydrothermal metasomatic types. Au metallogeny is closely related to formation and evolution of the rift and Au deposits occur mainly in Trassic strata which was deposited during strong rifting and they are controlled by the rift. Au mineralization occurs in favorable lithologies and facies and is generally associated with certain wall rock alterations.