德兴市朱林西金矿区地质特征及成矿基本规律分析

Geological characteristics and basic metallogenic law of zhulinxi gold deposit area,Dexing City

朱林西金矿床地处赣东北韧性剪切带蛇绿岩构造混杂带中的金山推覆剪切变形带中[1]。矿区控矿构造为金山-朱林韧性剪切带(Ⅰ1)和西蒋-石碑韧性剪切带(Ⅰ2)。V1、V8是主矿体,矿体呈"三位一体"产出,矿体主要赋存在韧性剪切带应变中心的超糜棱岩、糜棱岩带中,产状严格受主剪切面控制,呈似层状,舒缓波状产出。本文通过分析其矿床地质特征,得出了矿床多层韧性剪切带控矿、容矿的特征,总结出该矿床为受韧性剪切带控制的变质热液型金矿床。丰富了"金山式"金矿的成矿理论,预测矿区边深部具有成矿找矿远景。

Zhulinxi gold deposit is located in Jinshan nappe shear deformation zone in ophiolite structural melange zone of Northeast Jiangxi Province.The ore controlling structures are Jinshan Zhulin ductile shear zone (Ⅰ1) and Xijiang Shibei ductile shear zone (Ⅰ2).V1 and V8 are the main ore bodies,and the ore bodies are in "Trinity" output.The ore bodies are mainly located in ultramylonite and mylonite zones in the strain center of the ductile shear zone.The occurrence is strictly controlled by the main shear plane,which is layered and slow wave like.Based on the analysis of the geological characteristics of the deposit,this paper concludes that the deposit is a metamorphic hydrothermal gold deposit controlled by the ductile shear zone.It enriches the metallogenic theory of "Jinshan type" gold deposit and predicts that there is a metallogenic prospecting prospect in the deep edge of the mining area.