Precious metals in magmas of East Greenland; factors important to the mineralization in the Skaergaard Intrusion
Precious metals in magmas of East Greenland; factors important to the mineralization in the Skaergaard Intrusion
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东格陵兰岩浆中的贵金属；
DOI：
10.2113/gsecongeo.90.7.1911
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
C. Brooks
中科院分区：
文献类型：
--
作者：
T. Nielsen;C. Brooks
对东格陵兰火山被动边缘几个岩浆套的贵金属、Ni和Cu含量及其相互关系的测量表明，与之前的大体积高原玄武岩火山作用相比，Skaergaard侵入岩浆型的铂、钯、特别是金含量明显富集，铜含量相对缺乏。铂族矿物（PGM）和金（Au）含量的升高可能对侵入体中矿级贵金属的生成至关重要。在侵入体内发现了一个主要的PCM和金矿床，结合这些结果，提出了一套标准，这些标准可能对该省其他地方和世界范围内skaergaard型PCM矿床的形成至关重要。skaerggaard矿化似乎是迄今为止未被描述的一类铂和金矿化。
A survey of precious metals, Ni and Cu levels, and their mutual relationships in several magma suites of the East Greenland volcanic passive margin shows that the magma type which was parental to the Skaergaard intrusion was markedly enriched in Pt, Pd, and especially Au and relatively depleted in Cu compared to the preceding voluminous plateau basalt volcanism. It is likely that elevated levels of platinum-group minerals (PGM) and Au were critical to the generation of ore-grade precious metals in the intrusion. The discovery of a major PCM and Au deposit within the intrusion combined with these results suggests a set of criteria which might be critical to the formation of Skaergaard-type PCM deposits elsewhere in the province and worldwide. The Skaergaard mineralization appears to be a hitherto undescribed class of PGM and Au mineralizations.