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地球学报  2010 

黄沙坪铅锌多金属矿成岩成矿年龄测定及地质意义

DOI: 10.3975/cagsb.2010.04.05

Keywords: 锆石SHRIMPU-Pb年龄,辉钼矿Re-Os等时线年龄,成岩成矿,黄沙坪

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Abstract:

黄沙坪铅锌多金属矿位于南岭多金属成矿带湘南矿集区。自危机矿山接替资源勘查项目执行以来,又探明资源量达大型的含铁钨锡多金属矿及达中型的铜多金属矿,为开展科学研究提供了丰富的资料。笔者在前人研究的基础上,通过采用锆石SHRIMPU-Pb和辉钼矿Re-Os等时线定年方法,对分别对矿区56m中段的石英斑岩体以及矿石中共生的辉钼矿进行了精确定年,获得石英斑岩体锆石SHRIMPU-Pb年龄为152±3Ma,三组同一中段不同位置的辉钼矿Re-Os等时线年龄为159.4±3.3Ma,157.5±2.4Ma和157.6±2.3Ma。测定结果为厘定黄沙坪铅锌多金属矿成岩成矿作用多期多阶段性特点提供了重要的依据。

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