太古代金矿与麻粒岩形成或长英质侵入体有关吗？

来源 :地质地球化学 | 被引量 : 0次 | 上传用户：dxc717

【摘要】

：

太古代Au矿床现今流行的成因模式有两种,即麻粒岩化或岩浆作用,然而新的资料表明这些模式都不合理。绝大多数的太古代英闪质麻粒岩均以大离子亲石元素(LILE)的亏损为特征,所

【作者】

：

Kerri. R 肖龙

【机构】

：

桂林冶金地质学院,中国地质大学

【出处】

：

地质地球化学

【发表日期】

：

1993年3期

【关键词】

：

金矿床麻粒岩成因长英质侵入体

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太古代Au矿床现今流行的成因模式有两种,即麻粒岩化或岩浆作用,然而新的资料表明这些模式都不合理。绝大多数的太古代英闪质麻粒岩均以大离子亲石元素(LILE)的亏损为特征,所以与Au矿床中LILE的富集没有互补关系,而且麻粒岩与金矿床的K/Rb、K/Ba、K/Li、K/Cs和Th/U系列值也没有互补关系。所发表的C同位素体系资料及C/He通量计算值并不支持“麻粒岩化由地幔CO_2注入而引起”的模式,而且太古代金矿床的δ~(13)C值总体分布也与地幔的CO_2或麻料岩的C储库不吻合。太古代英闪岩,奥长花岗岩和花

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太古代金矿与麻粒岩形成或长英质侵入体有关吗？

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