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首页> 外文会议>International Congress on Earth Science, Exploration and Mining Around the Pacific Rim 10 - 13 October 1999 Bali, Indonesia >Peperite, Pumice and Perlite in Submarine Volcanic Successions: Implications for VHMS Mineralisation
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Peperite, Pumice and Perlite in Submarine Volcanic Successions: Implications for VHMS Mineralisation

机译：海底火山演替中的堇青石，浮石和珍珠岩：对VHMS矿化的影响

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摘要

The volcanic successions that host massive suphide deposits are diverse in composition, facies types and facies relationships. They also show a variety of spatial and temporal relationships to mineralisation. In many examples, such as the Koongie Park Formaiton in Western Australia, the host succession includes more or less conformable syn-volcanic sills with peperitic contacts. Such sills can be an important source of heat for fluid circulation, influencing patterns of hydrothermal alteration and the location of co-eval and later mineralisation. The impact of syn-volcanic sills on the host succession depends in part on the initial porosity and permeability of the enclosing facies. The special properties of glassy pumice-being highly porous, permeable, and reactive-allow pumice-rich facies to preferentially focus hydrothermal fluid flow.
机译：拥有大量硫化物沉积的火山演替在成分，相类型和相关系上各不相同。它们还显示出与矿化的各种时空关系。在许多示例中，例如西澳大利亚州的Koongie Park Formaiton，寄主的继承人或多或少具有与peperitic接触的顺火山基岩。这些窗台可能是流体循环的重要热源，影响了热液蚀变的模式以及共同评估和后来矿化的位置。顺火山基岩对宿主演替的影响部分取决于围岩相的初始孔隙度和渗透率。玻璃状浮石的特殊性质是高度多孔，可渗透且具有反应性的，富含浮石的相，可以优先集中热液流。

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