摘要
四川省九龙县黑牛洞铜矿床为近期新发现的一个规模在中型以上,产于江浪变质核杂岩中的富铜矿床。本文测试了黑牛洞铜矿床中与成矿密切相关的黑云母的40Ar/39Ar年龄为136.43±0.77Ma,说明黑牛洞矿床形成于燕山中期。结合矿区附近李伍富铜矿矿床地质特征及成矿年龄,表明黑牛洞铜矿床与李伍铜矿床为同一时期形成的矿床,两者成矿与松潘—甘孜造山带大规模岩浆热事件有关,这对于重新认识李伍铜矿床外围找矿潜力和进一步指导找矿工作具有重要意义。
Heiniudong copper deposit, situated in the Songpan-Ganz6 orogenic belt, is the high copper content deposit which is located in the Jianglang metamorphic core complex. The 40Ar/39Ar plateau age of biotite is （136.43±0. 77 Ma ）, which shows that the Heiniudong deposit was formed in Middle Yanshannian periods. The mineralization characteristics and metallogenic epoch of Heiniudong deposit is the same with that of the Liwu deposit in the east of the Jianglang metamorphic core complex. We conclude that the mineralization of the two copper deposits is related to the granitoids which formed the metamorphic core complex belt in the Songpan-Ganze terrane. This discovery is of great significance both in theory and practice for finding copper deposits in the region.
出处
《地质学报》
EI
CAS
CSCD
北大核心
2009年第5期671-679,共9页
Acta Geologica Sinica
基金
国家资源补偿费“四川九龙县里伍铜矿外围普查”项目(编号1212010630404)
“四川省九龙县黑牛洞铜矿详查”项目资助的成果。
关键词
40Ar/39Ar定年
成矿年代
富铜矿床
江浪变质核杂岩
黑牛洞
40Ar/39Ar method of dating
metallogenic epoch
high copper content deposit
Jianglang metamorphic core complex
Heiniudong
