吉林长白临江铜矿地质特征、找矿标志与前景分析

吉林长白临江铜矿位于辽吉元古代裂谷内,矿体产于花岗闪长岩与老岭群珍珠门组白云石大理岩接触带及岩体内部。本次在详细野外调研基础上,系统研究矿床地质特征、矿石特征及找矿标志。研究表明,矿石具有浸染状、致密块状及脉状构造,具有自形、半自形结构、交代溶蚀结构,围岩蚀变有矽卡岩化、钾长石化、碳酸盐化、沸石化等,矿床成因类型为矽卡岩型。本次研究总结矿床成矿规律,并在地层、构造、岩浆岩、蚀变及地球化学等方面指出找矿标志;通过与朝鲜惠山铜矿的对比,推测长白地区找矿潜力巨大。本次研究也为该地区同类型矿床的寻找提供理论基础。

Geological characteristics, prospecting criteria and prospecting potential of Linjiang Copper Deposit in Changbai Region, Jilin Province

The Linjiang copper, located on Liaoji Paleo-rift, Changbai jilin province, occurring in Srock body and contact zone between granodiorite and dolomite of the Zhenzhumen Formation of the Laoling Group. Based on detailed field geological survey, the paper studies the geological characteristics, structre and texture of ores and prospecting indicators. The result show that the ores are blocky structure, vein structure and impregnating structure. hypidiomorphic texture, hypidiomorphic texture and replacement. The wall rock alteratons include zeolitization, carbonation, K-feldspartion, skarntion. The genetic type belongs to skarn type. This study summarized the deposit metallogenic regularity, pointed out the prospecting indicators such as strata, structure, geochemical and alteration. It is believed that there has big resource potential in Changbai area by contrast with Huishan Cu deposit in the north Korea. This study also provided theoretical basis for prospecting in the area.