A peculiar type of stratabound tungsten mineralization in metacarbonate rocks was discovered and explored at Mallnock (Austria) during the late 1980s. It is the only tungsten occurrence in the Eastern Alps in which scheelite is associated with wolframite (96 mol% ferberite). The tungsten prospect is located in the Austroalpine Drauzug-Gurktal Nappe System recording polyphase low-grade regional metamorphism. Raman spectroscopy of carbonaceous material yield maximum metamorphic temperatures of 296 ± 27 °C and 258 ± 27 °C, which are assigned to Variscan and Eoalpine metamorphism, respectively. Scheelite and ferberite occur as polyphase stockwork-like mineralization in Fe-rich magnesite in the northern ore zone (Mallnock North), whereas in the western ore zone (Mallnock West), scheelite-quartz veinlets are exclusively hosted in dolomitic marbles. LA-ICP-MS analyses of scheelite and ferberite yield low contents of Mo, Nb, Ta, and rare earth elements, but high contents of Na and Sr. Uranium is particularly high in scheelite (up to 200 µg/g) and makes this mineral a suitable target for U–Pb dating. In situ U–Pb dating of scheelite yielded an early Permian age (294 ± 8 Ma) for Mallnock West and a Middle Triassic age (239 ± 3 Ma) for Mallnock North. A monzodioritic dike close to Mallnock yielded a U–Pb apatite date of 282 ± 9 Ma and supports the polyphase formation of this mineralization. The U–Pb scheelite ages indicate that a model for tungsten metallogeny in the Eastern Alps must also consider remobilization of tungsten by metamorphic fluids. In the Alps, the Permian to Triassic period (ca. 290–225 Ma) is characterized by an overall extensional geodynamic setting related to the breakup of Pangea. Lithospheric thinning caused higher heat flow, low-P metamorphism, and anatexis in the lower crust, which led to enhanced crustal fluid flow in the upper crust. These processes were not only responsible for the formation of metasomatic hydrothermal magnesite and siderite deposits in the Eastern Alps but also for this unique magnesite-ferberite-scheelite mineralization at Mallnock.

20 世纪 80 年代末，在马尔诺克（奥地利）发现并勘探了偏碳酸盐岩中一种特殊类型的层控钨矿化。它是东阿尔卑斯山唯一一处白钨矿与黑钨矿（96 mol% 镁铁矿）伴生的钨矿。钨矿远景位于记录多相低级区域变质作用的南高山 Drauzug-Gurktal 推覆系统。碳质材料的拉曼光谱得出的最大变质温度为 296 ± 27 °C 和 258 ± 27 °C，分别归属于 Variscan 和 Eoalpine 变质作用。白钨矿和镁铁矿以多相网状矿化形式存在于北部矿带（Mallnock North）的富铁菱镁矿中，而在西部矿带（Mallnock West），白钨矿-石英细脉仅赋存于白云质大理岩中。对白钨矿和铁长石进行 LA-ICP-MS 分析，得出 Mo、Nb、Ta 和稀土元素含量较低，但 Na 和 Sr 含量较高。白钨矿中的铀含量特别高（高达​​ 200 µg/g），这使得矿物是 U-Pb 定年的合适目标。白钨矿原位 U-Pb 测年得出 Mallnock West 的早期二叠世年龄（294 ± 8 Ma）和 Mallnock North 的中三叠世年龄（239 ± 3 Ma）。Mallnock 附近的二长闪长岩岩脉测得的 U-Pb 磷灰石年龄为 282 ± 9 Ma，支持该矿化的多相形成。U-Pb白钨矿年龄表明，东阿尔卑斯山钨成矿模型还必须考虑变质液对钨的再活化。在阿尔卑斯山，二叠纪至三叠纪时期（约 290-225 Ma）的特点是与盘古大陆分裂相关的整体伸展地球动力学背景。岩石圈减薄导致下地壳中较高的热流、低磷变质作用和深熔作用，从而导致上地壳中的地壳流体流动增强。这些过程不仅导致了东阿尔卑斯山交代热液菱镁矿和菱铁矿矿床的形成，而且还导致了马尔诺克独特的菱镁矿-铁贝氏体-白钨矿矿化。