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首页> 外文期刊>Economic geology and the bulletin of the Society of Economic Geologists >Porphyry Copper Systems
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Porphyry Copper Systems

机译：斑岩铜系统

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摘要

Porphyry Cu systems host some of the most widely distributed mineralization types at convergent plate boundaries, including porphyry deposits centered on intrusions; skarn, carbonate-replacement, and sediment-hosted Au deposits in increasingly peripheral locations; and superjacent high- and intermediate-sulfidation epi-thermal deposits. The systems commonly define linear belts, some many hundreds of kilometers long, as well as occurring less commonly in apparent isolation. The systems are closely related to underlying composite plutons, at paleodepths of 5 to 15 km, which represent the supply chambers for the magmas and fluids that formed the vertically elongate (>3 km) stocks or dike swarms and associated mineralization. The plutons may erupt volcanic rocks, but generally prior to initiation of the systems. Commonly, several discrete stocks are emplaced in and above the pluton roof zones, resulting in either clusters or structurally controlled alignments of porphyry Cu systems. The rheology and composition of the host rocks may strongly influence the size, grade, and type of mineralization generated in porphyry Cu systems. Individual systems have life spans of-100,000 to several million years, whereas deposit clusters or alignments as well as entire belts may remain active for 10 m.y. or longer.
机译：斑岩铜矿系统在汇聚的板块边界处拥有一些分布最广的矿化类型，包括以侵入体为中心的斑岩矿床。在越来越多的外围地区出现矽卡岩，碳酸盐置换和含泥沙的金矿床;以及上，下硫化超热沉积物。这些系统通常定义了几百公里长的线性传送带，并且很少出现在明显的隔离中。该系统与古深部5至15 km的复合岩体密切相关，这些岩体代表了形成垂直伸长（> 3 km）储量或堤防群和相关矿化作用的岩浆和流体的供应室。 lut可能会喷出火山岩，但通常是在系统启动之前喷出的。通常，在离散子顶区的上方和上方都放置了一些离散的储层，从而导致斑岩型铜系统的簇或结构受控的排列。基质岩石的流变学和组成可能会强烈影响斑岩型铜系统中产生的矿化的大小，等级和类型。单个系统的使用寿命为100,000至数百万年，而沉积物簇或路线以及整个带可能会保持活跃状态​​达10m.y。或更长。

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