摘要
温杖子金矿床位于辽宁省建昌县境内,为辽西地区著名的中型金矿床,矿体主要赋存于破碎蚀变岩中,受断裂控制明显。岩石地球化学研究表明:温杖子金矿区花岗闪长岩属于过铝质高钾钙碱性系列岩石,轻稀土元素富集、重稀土元素亏损,具有微弱的负Eu异常,无或极弱Ce异常,富集大离子亲石元素(Rb、K、Ba等)和化学性质活泼的不相容元素(U、Th等),亏损高场强元素(Nb、P、Hf、Zr、Ti等)和重稀土元素(Y、Yb、Lu等),具有与埃达克岩相似的岩石地球化学特征,岩浆来源于地壳和地幔物质混合源区,为火山弧花岗岩构造环境,形成于华北板块由挤压构造体制转化为伸张构造体制阶段。温杖子金矿区成矿作用经历了燕山早期、燕山中期和燕山晚期3个阶段,主成矿期为燕山晚期,其成矿作用与花岗闪长岩侵位相关,认为温杖子金矿床属于蚀变岩型金矿床。
Located in Jianchang County,Liaoning Province,Wenzhangzi Gold Deposit is a renowned medium gold deposit,and its ore bodies mainly host in fragmented altered rocks and are strictly controlled by fractures.Lithogeochemistry characteristics study indicates the granodiorite in Wenzhangzi Gold District are subalkaline peraluminous high potassium calcium alkaline rock series and are characterized by LREE enrichment,HREE depletion,slight negative Eu anomaly,and no or extremely weak Ce anomaly,enrichment of large-ion lithosphile elements(Rb,K,Ba)and incompatible elements(U,Th),depletion of high field-strength elements(Nb,P,Hf,Zr,Ti)and HREE(Y,Yb,Lu).Granodiorites have similar petrological features of adakite,and their magmas came from crust-mantle mixture origin.The tectonic background is volcanic arc granite tectonic environment,formed in the North China Plate transformation stage from the extrusion tectonic system into the stretching tectonic system stage.The mineralization of Wenzhangzi Gold District experienced three stages:early Yanshanian,middle Yanshanian and late Yanshanian periods.The main mineralization period is the late Yanshanian period,which is related to the intrusion of granodiorite.So Wenzhangzi Gold Deposit is deemed to be an altered rock type gold deposit.
作者
张国宾
王丞明
蒋玉岩
周杨
韩超
陈兴凯
Zhang Guobin;Wang Chengming;Jiang Yuyan;Zhou Yang;Han Chao;Chen Xingkai(Geological Engineering Department,Liaoning Technical University;Management Department,Liaoning Technical University)
出处
《黄金》
CAS
2020年第5期20-25,共6页
Gold
基金
辽宁省大学生创新创业训练计划项目(201810147053)
辽宁省教育厅面上基金(LJ2019JL027)
辽宁省博士科研启动基金(201601370)。
关键词
花岗闪长岩
岩石地球化学特征
矿床地质特征
温杖子金矿区
辽西
granodiorite
lithogeochemistry characteristics
deposit geological characteristics
Wenzhangzi Gold District
Western Liaoning
