The Fort Worth Basin in north-central Texas is a foreland basin of the Ouachita Orogen that was formed during the late Paleozoic Laurentia-Gondwana collision, and its Paleozoic strata contain key information about the tectonic processes on the southern margin of Laurentia. Here we study sandstone petrography, mudstone rare-earth element (REE) and Nd isotope geochemistry of the Paleozoic clastic rocks in this basin. These data were integrated with previously published detrital zircon UPb data to determine Paleozoic sediment provenance in the Fort Worth Basin and response of the sedimentary system to the Laurentia-Gondwana collision. Sandstone composition changed from the Cambrian (Q₉₀F₆L₄)–Middle Pennsylvanian (Q₈₉F₄L₇) to the Late Pennsylvanian-earliest Permian (Q₈₄F₂L₁₄), suggesting an increase of input from a recycled orogen after the Middle Pennsylvanian. The mudstones have REE patterns of average upper crust. Compared to the Cambrian-Lower Pennsylvanian mudstones, the Middle Pennsylvanian-lowermost Permian mudstones have more depleted light REE, larger Eu anomalies, and lower ε_Nd values, suggesting a change of sediment provenance after the Early Pennsylvanian. This change is best explained by the arrival of clastic grains from Gondwana, most likely the Sabine Peri-Gondwana terrane, during the Middle Pennsylvanian. Our new provenance data support the previous interpretation that Gondwanan detritus contributed sediment to the Fort Worth Basin during the Middle Pennsylvanian-early Permian, most likely through erosion by transverse rivers linking the high Ouachita hinterland and foreland as the collision of Laurentia and Gondwana advanced to the east of the Fort Worth Basin.

德克萨斯州中北部的沃思堡盆地是古生代劳伦-冈瓦纳碰撞晚期形成的瓦希塔造山带前陆盆地，其古生界地层包含劳伦特南缘构造过程的关键信息。在这里，我们研究了该盆地古生代碎屑岩的砂岩岩相学、泥岩稀土元素 (REE) 和 Nd 同位素地球化学。这些数据与先前发表的碎屑锆石 U Pb 数据相结合，以确定 Fort Worth 盆地的古生代沉积物来源以及沉积系统对 Laurentia-Gondwana 碰撞的响应。砂岩成分从寒武纪 (Q ₉₀ F ₆ L ₄ )-宾夕法尼亚中部 (Q ₈₉ F₄ L ₇ ) 到晚宾夕法尼亚 - 最早的二叠纪 (Q ₈₄ F ₂ L ₁₄ )，表明在宾夕法尼亚中期之后来自再生造山带的输入增加。泥岩具有平均上地壳的稀土元素分布。与寒武系-下宾夕法尼亚泥岩相比，中宾夕法尼亚-下二叠纪泥岩具有更多的贫轻稀土元素、更大的 Eu 异常和更低的 ε _Nd值，表明早期宾夕法尼亚时代之后沉积物来源发生了变化。这种变化最好用冈瓦纳纪碎屑颗粒的到来来解释，这些碎屑颗粒很可能是宾夕法尼亚纪中期的 Sabine Peri-Gondwana 地体。我们新的来源数据支持先前的解释，即冈瓦纳碎屑在宾夕法尼亚中期 - 早二叠世期间为沃思堡盆地贡献了沉积物，最有可能是通过连接高瓦希塔腹地和前陆的横向河流的侵蚀，因为劳伦西亚和冈瓦纳大陆的碰撞推进到了沃思堡盆地以东。