江西德兴朱林西—竹叶岭金矿床地质特征及其成矿作用与成矿模式

Geological characteristics,metallogenesis and metallogenic pattern of Zhulinxi-Zhuyeling Gold Deposit in Dexing,Jiangxi Province

朱林西—竹叶岭金矿床位于金山金矿田西部,是与韧性剪切带有关的金矿床。矿体主要产于中元古界双桥山群的金山—朱林韧性剪切带和西蒋—石碑韧性剪切带内,矿体类型主要为蚀变糜棱岩型,成矿阶段可分为黄铁矿-石英阶段、硫化物-石英-铁镁碳酸盐阶段和黄铁矿-钙镁碳酸盐阶段。综合研究表明,金矿成矿主要受地层-构造-岩浆岩三者的耦合因素控制,韧性剪切作用是金活化迁出的主要原因,进而提出了"沉积—变形—变质(活化)—迁移—混合—蚀变—矿化"成矿模式。

Zhulinxi-Zhuyeling Gold Deposit is located in the western part of Jinshan Gold Field and is a gold deposit related to ductile-shear zone. The orebodies mainly occur in the Jinshan-Zhulin ductile-shear zone and the Xijiang-Shibei ductile-shear zone of Shuangqiaoshan Group,the orebody type is mainly altered mylonite,the mineralization stage can be classified into 3 stages including pyrite-quartz,sulfide-quartz-iron magnesium marble and pyrite-calcium magnesium marble. Comprehensive study shows that the gold mineralization is mainly controlled by strata-structure-magmatite coupling factor,the ductile shearing is the main reason for gold activation emigration,and the 'sedimentation-deformation-metamorphism( activation)-migration-mixing-alteration-mineralization' ore-forming pattern is put forward.