The Salau deposit, located in the Axial Zone of the French Pyrenees, is the most important tungsten deposit ever mined in France. Two types of mineralization, both closely associated with a granodiorite intrusion, are distinguished. The first is a fine-grained scheelite skarn related to contact metamorphic and metasomatism between the intrusion and the adjacent carbonate rocks. The second type is represented by massive sulfides accompanied by coarse-grained scheelite, apatite, and electrum. This syn-kinematic mineralization is found enclosed within the skarn ore but occurs also within the granodiorite stock along major ductile–brittle shear zones. REE contents of scheelite and apatite from the two types of mineralization show differences suggesting that the two types derived from two different fluids. U/Pb dating on zircon, apatite and scheelite illustrates that magmatic zircon and apatite formed at 295 ± 2 Ma during emplacement and cooling of the granodiorite intrusion. These are cogenetic to the fine-grained scheelite skarn. Hydrothermal apatite from massive sulfide ores yields a younger age of 289 ± 2 Ma, whereas closely associated coarse-grained scheelite yields a consistent although less precise age of 284 ± 11 Ma. These results suggest that the late massive sulfide ore with abundant coarse-grained scheelite and electrum is related to the emplacement of an underlying, more evolved intrusion, accompanied during its ascent by the development of steeply dipping reverse-dextral shear zones.

中文翻译：

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晚期 Variscan W/Au 矿床（Salau，法国比利牛斯山脉）的多相演化：来自 REE 和 U/Pb LA-ICP-MS 分析的见解

Salau 矿床位于法国比利牛斯山脉的轴向带，是法国有史以来开采的最重要的钨矿床。两种类型的矿化都与花岗闪长岩侵入密切相关。第一个是细粒白钨矿矽卡岩，与侵入体与相邻碳酸盐岩之间的接触变质和交代作用有关。第二种以块状硫化物为代表，伴有粗粒白钨矿、磷灰石和金银矿。这种同运动成矿被发现封闭在矽卡岩矿石中，但也发生在沿主要韧性-脆性剪切带的花岗闪长岩储量中。来自两种矿化类型的白钨矿和磷灰石的 REE 含量显示出差异，表明这两种类型来自两种不同的流体。锆石 U/Pb 测年，磷灰石和白钨矿说明在花岗闪长岩侵入体就位和冷却过程中，岩浆锆石和磷灰石形成于 295 ± 2 Ma。这些是细粒白钨矿矽卡岩的共同遗传。来自块状硫化物矿石的热液磷灰石产生 289 ± 2 Ma 的年轻年龄，而密切相关的粗粒白钨矿产生一致但不太精确的年龄 284 ± 11 Ma。这些结果表明，具有丰富粗粒白钨矿和金银矿的晚期块状硫化矿与下伏的、更进化的侵入体的就位有关，在其上升过程中伴随着急剧倾斜的反向右旋剪切带的发展。这些是细粒白钨矿矽卡岩的共同遗传。来自块状硫化物矿石的热液磷灰石产生 289 ± 2 Ma 的年轻年龄，而密切相关的粗粒白钨矿产生一致但不太精确的年龄 284 ± 11 Ma。这些结果表明，具有丰富粗粒白钨矿和金银矿的晚期块状硫化矿与下伏的、更进化的侵入体的就位有关，在其上升过程中伴随着急剧倾斜的反向右旋剪切带的发展。这些是细粒白钨矿矽卡岩的共同遗传。来自块状硫化物矿石的热液磷灰石产生 289 ± 2 Ma 的年轻年龄，而密切相关的粗粒白钨矿产生一致但不太精确的年龄 284 ± 11 Ma。这些结果表明，具有丰富粗粒白钨矿和金银矿的晚期块状硫化矿与下伏的、更进化的侵入体的就位有关，在其上升过程中伴随着急剧倾斜的反向右旋剪切带的发展。