We carried out a sedimentary provenance analysis of the Devonian Gualilán Group, Central Precordillera of western Argentina, focusing on the siliciclastic record of the Talacasto (Lower Devonian) and the Punta Negra (Lower-Middle Devonian) formations. Provenance is determined based on petrography, heavy minerals, whole-rock geochemistry, Sm–Nd isotopes, and U–Pb detrital zircon dating. Sandstones are composed of quartz, feldspar, and metamorphic and plutonic lithoclasts. The Gualilán Group underwent moderate weathering indicated by CIA values and Th/U ratios below 76 and 4.9, respectively. Th/Sc, Zr/Sc, Cr/V and La/Th ratios, negative Eu-anomalies and REE patterns point to felsic source compositions. The heavy minerals and zircon morphologies indicate that high-grade metamorphic and igneous rocks provided the bulk of detritus. T_DM ages between 1.40 and 1.46 Ga and ε_Nd(t) values ranging from − 9.21 to − 11.13 constrain the signature of the sources. U–Pb detrital zircon ages for the Talacasto Formation are equally distributed between the Famatinian (Late Cambrian–Late Devonian), Pampean–Brazilian (Neoproterozoic–Early Cambrian) and Grenvillian-Sunsas (Mesoproterozoic) orogenic cycles. Detrital zircon ages of the Punta Negra Formation were dominantly supplied from Mesoproterozoic rocks, linked to the Grenvillian-Sunsas orogeny. The data indicate a provenance from rocks located eastwards of the basin represented by the basement of the Pampean Ranges. The peripheral foreland basin developed during the post-collisional regime that followed the accretion of Cuyania against Gondwana. Whereas eastern and western Pampean Ranges provided detritus to the Talacasto Formation, the Punta Negra Formation was sourced by the western Pampean Ranges, implying exhumation and erosion of such basement during the Devonian.

我们对阿根廷西部中部Precordillera的泥盆纪Gualilán组进行了沉积物源分析，重点研究了Talacasto（下泥盆统）和Punta Negra（下泥盆系中下部）的硅质碎屑记录。物源是根据岩石学，重矿物，全岩石地球化学，Sm-Nd同位素和U-Pb碎屑锆石测年确定的。砂岩由石英，长石，变质和古生的碎石碎屑组成。Gualilán组经历了中度风化，CIA值和Th / U比分别低于76和4.9。Th / Sc，Zr / Sc，Cr / V和La / Th之比，负Eu异常和REE模式指示长英质源组成。重矿物和锆石形态表明，高品位的变质和火成岩提供了大量碎屑。Ť_DM年龄介于1.40和1.46 Ga和εNd _{（t）之间}范围从− 9.21至− 11.13的值限制了源签名。塔拉卡斯托组的U–Pb碎屑锆石年龄在法马汀期（寒武纪晚期－泥盆世晚期），潘邦－巴西（新生代—早寒武纪）和格林维尔－新萨斯（中古生代）造山周期之间平均分布。蓬塔内格拉组的碎屑锆石年龄主要来自与格伦维利安-桑萨斯造山运动有关的中元古代岩石。数据表明，该盆地的岩石起源于潘庞山脉山脉基底所代表的盆地东部。在碰撞后政权期间，外围前陆盆地得到了发展，随后Cuyania增生了冈瓦纳。东部和西部的潘庞山脉为塔拉卡斯托组提供了碎屑，