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首页> 外文期刊>Economic geology and the bulletin of the Society of Economic Geologists >HYPOGENE AL UNITE FROM THE EL SALVADOR DISTRICT, CHILE, INDICATES POTENTIAL FOR A BLIND PORPHYRY COPPER CENTER
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HYPOGENE AL UNITE FROM THE EL SALVADOR DISTRICT, CHILE, INDICATES POTENTIAL FOR A BLIND PORPHYRY COPPER CENTER

机译:Hypogene Al团结智利萨尔瓦多区,表明潜在的盲斑铜中心

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摘要

Surface samples of hypogene alunite that cement late breccia bodies from the El Salvador porphyry copper district of Chile were recently dated. One alunite sample over the principal Turquoise Gulch porphyry deposit has a Ar-40/ Ar-39 total gas age of 40.64 +/- 1.04 Ma, overlapping the age of a late latite intrusion. Two other samples associated with quartz-alunite replacement of rhyolite, similar to 750 m southwest of the collapse zone over the block cave of the porphyry copper deposit, are distinctly younger, at 38.12 +/- 0.66 and 38.04 +/- 0.22 Ma (averages of duplicate analyses, with +/- 2 sigma errors).
机译:智利萨尔瓦多孔铜区的水泥晚布雷西亚尸体的表面样品最近被约会。 一个独立的绿松石古纹斑岩矿床上的一个大型矿石样品具有AR-40 / AR-39总汽油夜晚40.64 +/- 1.04 mA,重叠了延迟入侵的年龄。 另外两种与石耳其石替代卟啉代替的石英 - alunite替代的样品,类似于斑岩铜矿床的坍塌区西南750米,是明显的年轻,38.12 +/- 0.66和38.04 +/- 0.22 mA(平均值 重复分析,具有+/- 2 sigma错误)。

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