Abstract The Characato suite (Achala batholith, Sierras Pampeanas, Argentina), consists of at least six granitic facies with affinities of F-rich moderately to strongly peraluminous A-type granites. The two more extensive facies (Facies 1 and 2) and a minor one (Facies 5) would represent at least three batches of magma generated by partial melting from the same source but at different times and under different P-T conditions. Previous and new U-Pb zircon ages for the Characato suite suggest that these granites crystallized between 366 ± 3 and 359 ± 5 Ma. U-Pb inherited zircon ages, Th/U ratios and the whole-rock Sr-Nd isotopic compositions indicate that the source is predominantly composed of Early Cambrian S-type granites and diatexites and minor Early Ordovician TTG granitoids, which formed part of the Devonian deep crust of the Sierras de Cordoba. Mineral saturation thermometers, phase equilibrium modeling and trace element modeling suggest that the Facies 1 comprise magmas generated at ~ 0.5 GPa and ~805°C and least evolved Facies 2 (+ Facies 5) comprise magmas generated at ~ 0.7 GPa and ~870°C: both could represent low proportions of pure melts (~10% to ~20%) that contain minor amounts of entrained residual mineral phases. Fractional crystallization models may explain the chemical variation in the evolved granitic samples (Facies 2, 3, 4 and 6) by fractional crystallization of plagioclase, K-feldspar, quartz, biotite, muscovite, zircon, monazite and Fe-Ti-oxides. Facies 6, composed of high evolved granitic rocks, probably represents the late stages of the fractional crystallization process where late fluids interacted with the magmas.

中文翻译：

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富含 F 的过铝质 A 型花岗岩的岩石成因：以阿根廷 Sierras Pampeanas 泥盆纪 achala 基岩（Characato Suite）为例

摘要 Characato 组（Achala 基岩，Sierras Pampeanas，阿根廷）由至少 6 个具有亲合性的富 F 中度至强过铝质 A 型花岗岩相组成。两个更广泛的相（相 1 和 2）和一个次要的相（相 5）将代表至少三批来自同一来源但在不同时间和不同 PT 条件下部分熔融产生的岩浆。Characato 套件以前和新的 U-Pb 锆石年龄表明，这些花岗岩在 366 ± 3 到 359 ± 5 Ma 之间结晶。U-Pb 继承锆石年龄、Th/U 比值和全岩 Sr-Nd 同位素组成表明，该源主要由早寒武世 S 型花岗岩和硅质岩和少量早奥陶世 TTG 花岗岩组成，它形成了科尔多瓦山脉泥盆纪深地壳的一部分。矿物饱和温度计、相平衡建模和微量元素建模表明，相 1 包含在 ~0.5 GPa 和 ~805°C 下生成的岩浆，而演化最少的相 2（+ 相 5）包含在~0.7 GPa 和~870°C 生成的岩浆：两者都可以代表低比例的纯熔体（~10% 到 ~20%），其中包含少量夹带的残余矿物相。分级结晶模型可以通过斜长石、钾长石、石英、黑云母、白云母、锆石、独居石和铁钛氧化物的分级结晶来解释演化花岗岩样品（相 2、3、4 和 6）的化学变化。相 6，由高演化花岗岩组成，