The Iberian Pyrite Belt is a world-class metallogenic district developed at the Devonian-Carboniferous boundary in the Iberian Variscides that currently has seven active mines: Neves Corvo (Cu-Zn-Sn) and Aljustrel (Cu-Zn) in Portugal, and Riotinto (Cu), Las Cruces (Cu), Aguas Teñidas (Cu-Zn-Pb), Sotiel-Coronada (Cu-Zn-Pb), and La Magdalena (Cu-Zn-Pb) in Spain. The Iberian Pyrite Belt massive sulfide ores are usually hosted in the lower sections of the volcano-sedimentary complex (late Famennian to late Visean), but they also occur in the uppermost levels of the phyllite-quartzite group at the Neves Corvo deposit, stratigraphically below the volcano-sedimentary complex. A Pb-Nd-Sr isotope dataset was obtained for 98 Iberian Pyrite Belt metapelite samples (from Givetian to upper Visean), representing several phyllite-quartzite group and volcano-sedimentary complex sections that include the footwall and hanging-wall domains of ore horizons at the Neves Corvo, Aljustrel, and Lousal mines.The combination of whole-rock Nd and Sr isotopes with Th/Sc ratios shows that the siliciclastic components of Iberian Pyrite Belt metapelites are derived from older quartz-feldspathic basement rocks (–11 ≤ ε_Ndinitial ≤ –8 and (⁸⁷Sr/⁸⁶Sr)_i up to 0.727). The younger volcano-sedimentary complex metapelites (upper Tournaisian) often comprise volcanic-derived constituents with a juvenile isotopic signature, shifting the ε_Ndi up to +0.2.The Pb isotope data confirm that the phyllite-quartzite group and volcano-sedimentary complex successions are crustal reservoirs for metals found in the deposits. In Neves Corvo, where there is more significant Sn- and Cu-rich mineralization, the higher (²⁰⁶Pb/²⁰⁴Pb)_i and (²⁰⁷Pb/²⁰⁴Pb)_i values displayed by phyllite-quartzite group and lower volcano-sedimentary complex metapelites (up to 15.66 and 18.33, respectively) suggest additional contributions to the metal budget from a deeper and more radiogenic source.The proximity to Iberian Pyrite Belt massive sulfide ore systems hosted in metapelite successions is observed when (²⁰⁷Pb/²⁰⁴Pb)_i >15.60 and Fe₂O₃/TiO₂ or (Cu+Zn+Pb)/Sc >10. These are important criteria that should be considered in geochemical exploration surveys designed for the Iberian Pyrite Belt.

中文翻译：

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伊比利亚黄铁矿带变灰岩的 Pb-Nd-Sr 同位素地球化学及其与物源分析和矿产勘查调查的相关性

伊比利亚黄铁矿带是一个世界级的成矿区，位于伊比利亚瓦里西德的泥盆纪-石炭纪边界，目前有七个活跃的矿山：葡萄牙的 Neves Corvo (Cu-Zn-Sn) 和 Aljustrel (Cu-Zn)，以及 Riotinto (Cu)、Las Cruces (Cu)、Aguas Teñidas (Cu-Zn-Pb)、Sotiel-Coronada (Cu-Zn-Pb) 和 La Magdalena (Cu-Zn-Pb)。伊比利亚黄铁矿带块状硫化物矿石通常位于火山沉积复合体的下部（法门尼晚期至维塞安晚期），但它们也出现在 Neves Corvo 矿床的千枚岩-石英岩组的最上层，地层低于火山-沉积复合体。获得了 98 个伊比利亚黄铁矿带变泥质岩样品（从 Givetian 到上 Visean）的 Pb-Nd-Sr 同位素数据集，_Nd初始≤ –8 和 ( ⁸⁷ Sr/ ⁸⁶ Sr) _i最高 0.727)。较年轻的火山-沉积杂岩变质岩（上图尔奈阶）通常包含具有幼年同位素特征的火山衍生成分，将 ε _{Nd i}移动到 +0.2。Pb 同位素数据证实，千枚岩-石英岩群和火山-沉积杂岩演替是在沉积物中发现的金属的地壳储层。在 Neves Corvo，富含 Sn 和 Cu 的矿化更显着，较高的 ( ²⁰⁶ Pb/ ²⁰⁴ Pb) _i和 ( ²⁰⁷ Pb/ ²⁰⁴ Pb) _i千枚岩-石英岩组和较低的火山-沉积复合变泥质岩显示的值（分别高达 15.66 和 18.33）表明来自更深和更放射源的金属预算的额外贡献。靠近伊比利亚黄铁矿带的块状硫化物矿石系统托管在当( ²⁰⁷ Pb/ ²⁰⁴ Pb) _i >15.60 和 Fe ₂ O ₃ /TiO ₂或 (Cu+Zn+Pb)/Sc >10时观察到变泥质岩层序。这些是为伊比利亚黄铁矿带设计的地球化学勘探调查应考虑的重要标准。