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地质学报  2009 

四川省九龙县黑牛洞富铜矿矿床黑云母40Ar-39Ar测年及其地质意义

, PP. 671-679

Keywords: 40Ar/39Ar定年,成矿年代,富铜矿床,江浪变质核杂岩,黑牛洞

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Abstract:

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床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。

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