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首页> 外文期刊>Zeitschrift der Deutschen Gesellschaft fur Geowissenschaften: ZDGG >Casting new light on tungsten deposits in the Eastern Alps
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Casting new light on tungsten deposits in the Eastern Alps

机译：在东阿尔卑斯山的钨矿床上铸造新灯

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Based on economic importance and potential supply risk tungsten is considered as a critical raw material by the EU as about 80 % of the global tungsten supply comes from China. Within the EU the Felbertal scheelite deposit in Austria is one of the few producing tungsten mines. Vein-stockwork scheelite mineralization in this area was formed at ~340 Ma during the Variscan Orogeny, with subsequent metamorphic overprint and remobilization. Thus, several generations of scheelite can be distinguished. REE analyses (LA-ICP-MS) of these scheelite generations demonstrate that primary magmatic- hydrothermal (Scheelite 1 and 2) and metamorphic scheelite (Scheelite 3) have different chemical signatures. Extensive greenfield exploration during the 1980s led to the discovery of many other scheelite occurrences in the Eastern Alps. Since then, tungsten mineralization is known from different parts of the Austroalpine Unit and the Penninic/Subpenninic Nappe System. Mineralization style includes strata-bound mineralization, for example in metabasites (Felbertal), metacarbonates partly with magnesite (Tux-Lanersbach, Mallnock) and calc-silicate rocks (Messelingscharte, Lienzer Schlossberg), orogenic Au-W veins (Schellgaden) and scheelite-bearing metamorphic veins (Mühlbach/Neukirchen). The “W Alps” project (W stands for the chemical symbol of tungsten) aims to develop assessment criteria for the evaluation of regional tungsten potentials in Austria. In order to understand the context in the current geological-tectonic concept for the Eastern Alps the project includes field-based studies of tungsten-bearing geological units. The data will be integrated in a metallogenetic model of Alpine tungsten mineralization. We will define the scheelite trace element characteristics from different deposit types and develop an exploration tool that can be applied to samples lacking geological context (i.e. stream sediments). In conjunction, we aim to provide a consistent set of geological and geo
机译：基于经济重要性和潜在供应风险，欧盟认为钨是一种重要的原材料，因为全球80%的钨供应来自中国。在欧盟内部，奥地利的Felbertal白钨矿是为数不多的生产钨矿的矿床之一。该地区的脉网白钨矿成矿作用形成于华力西造山运动期间约340 Ma，随后发生变质叠加和再活化。因此，可以区分几代白钨矿。这些白钨矿世代的稀土元素分析（LA-ICP-MS）表明，原生岩浆热液（白钨矿1和2）和变质白钨矿（白钨矿3）具有不同的化学特征。20世纪80年代，大量的绿地勘探导致在阿尔卑斯山东部发现了许多其他白钨矿矿点。从那时起，已知南奥阿尔卑斯单元和宾夕法尼亚/亚宾夕法尼亚推覆体系统的不同部分存在钨矿化。矿化类型包括层控矿化，例如变质基性岩（Felbertal）、部分含菱镁矿（Tux Lanersbach、Mallnock）的偏碳酸盐岩和钙硅酸盐岩（Messelingscharte、Lienzer-Schlossberg）、造山型Au-W矿脉（Schellgaden）和含白钨矿的变质矿脉（Mühlbach/Neukirchen）。“W阿尔卑斯山”项目（W代表钨的化学符号）旨在为评估奥地利区域钨潜力制定评估标准。为了了解阿尔卑斯山东部当前地质构造概念的背景，该项目包括对含钨地质单元的现场研究。这些数据将整合到阿尔卑斯钨成矿的成矿模型中。我们将确定不同矿床类型的白钨矿微量元素特征，并开发一种可用于缺乏地质背景的样品（即河流沉积物）的勘探工具。同时，我们的目标是提供一套一致的地质和地理信息

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