Abstract The Oksut high sulfidation (HS) epithermal Au (-Cu) deposit (35.32 million tonnes of ore at 1.22 g/t Au) is located in the Central Anatolian Volcanic Province (CAVP) at the south-eastern segment of the Central Anatolian Crystalline Complex (CACC). The deposit is hosted by large hydrothermal breccia bodies and hornblende-rich basaltic andesite porphyry of the Develidag Volcanic Complex (DVC), which were pervasively altered to form silicification and argillic assemblages. The host rocks and mineralization are covered by post-mineral pyroxene-rich basaltic andesite of DVC. The volcanic rocks have a medium-K calc-alkaline affinity similar to regional volcanic rocks of the DVC. The gold and copper mineralization is mostly associated with quartz and primary sulfides hosted by silicification and argillic alteration particularly quartz-alunite cemented breccias and subsequently enriched by supergene oxidation processes causing destabilization of the primary sulfides. The LA-ICP-MS zircon U-Pb geochronology indicates a range of 206Pb/238U ages between 5.4 and 6.0 Ma with an average mean age of autocrystic grains of 5.73 ± 0.06 Ma for the host hornblende-rich basaltic andesite porphyry and 5.67 ± 0.07 Ma for the post-mineralization basaltic andesite cover. The high-precision CA-ID-TIMS analysis of the youngest grains from both rock types defines ages 5.778 ± 0.013 Ma and 5.700 ± 0.019, respectively, which bracket the ore mineralization between 5.791 and 5.681 Ma, including the error uncertainty. Consequently, the Oksut gold mineralization took place in a very narrow lifetime of 78 ± 32 Ka. This is the youngest age for an economic gold deposit in Turkey.

中文翻译：

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土耳其安纳托利亚中部晚中新世 Öksüt 高硫化浅成热液金铜矿床：地质学、年代学和地球化学

摘要 Oksut 高硫化 (HS) 超热液 Au (-Cu) 矿床（3532 万吨矿石，1.22 g/t Au）位于安纳托利亚中部结晶区东南部的安纳托利亚中部火山省（CAVP）。复杂（CACC）。该矿床由大型热液角砾岩体和 Develidag 火山复合体 (DVC) 的富含角闪石的玄武安山斑岩组成，这些斑岩被普遍改造形成硅化和泥质组合。主岩和矿化被 DVC 的后矿物富辉石玄武安山岩所覆盖。火山岩具有类似于 DVC 区域火山岩的中等 K 钙碱性亲和力。金和铜矿化主要与硅化和泥质蚀变所承载的石英和原生硫化物有关，特别是石英-明矾石胶结角砾岩，随后通过表生氧化过程富集，导致原生硫化物不稳定。LA-ICP-MS 锆石 U-Pb 年代学表明 206Pb/238U 年龄范围在 5.4 到 6.0 Ma 之间，宿主富含角闪石的玄武安山斑岩的自晶颗粒平均年龄为 5.73 ± 0.06 Ma，平均年龄为 5.077 ±马为后矿化玄武质安山岩盖。来自两种岩石类型的最年轻颗粒的高精度 CA-ID-TIMS 分析分别定义了 5.778 ± 0.013 Ma 和 5.700 ± 0.019 的年龄，这将矿石成矿包含在 5.791 和 5.681 Ma 之间，包括误差不确定性。最后，Oksut 金矿化发生在 78 ± 32 Ka 的非常狭窄的生命周期内。这是土耳其经济型金矿的最年轻年龄。