In the Jaca foreland basin (southern Pyrenees), two main sediment routing systems merge from the late Eocene to the early Miocene, providing an excellent example of interaction of different source areas with distinct petrographic signatures. An axially drained fluvial system, with its source area located in the eastern Central Pyrenees, is progressively replaced by a transverse-drained system that leads to the recycling of the older turbiditic foredeep. Aiming to provide new insights into the source-area evolution of the Jaca foreland basin, we provide new data on heavy-mineral suites, from the turbiditic underfilled stage to the youngest alluvial-fan systems of the Jaca basin, and integrate the heavy-mineral signatures with available sandstone petrography. Our results show a dominance of the ultrastable Ap-Zrn-Tur-Rt assemblage through the entire basin evolution. However, a late alluvial sedimentation stage brings an increase in other more unstable heavy minerals, pointing to specific source areas belonging to the Axial and the North Pyrenean Zone and providing new insights into the response of the heavy-mineral suites to sediment recycling. Furthermore, we assess the degree of diagenetic overprint vs. provenance signals and infer that the loss of unstable heavy minerals due intrastratal dissolution is negligible at least in the Peña Oroel and San Juan de la Peña sections. Finally, we provide new evidence to the idea that during the late Eocene the water divide of the transverse drainage system was located in the North Pyrenean Zone, and areas constituted by the Paleozoic basement were exposed in the west-Central Pyrenees at that time. Our findings provide new insights into the heavy-mineral response in recycled foreland basins adjacent to fold-and-thrust belts.

中文翻译：

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前陆盆地充填和抬升过程中的重矿物来源特征：以哈卡盆地为例（西班牙比利牛斯南部）

在哈卡前陆盆地（比利牛斯山脉南部），两个主要的沉积物路由系统从始新世晚期到中新世早期合并，提供了不同源区与不同岩相特征相互作用的绝佳实例。一个轴向排水的河流系统，其源区位于比利牛斯山脉中部的东部，逐渐被一个横向排水系统所取代，从而导致了旧的浊流前坡的再循环。为了提供有关哈卡前陆盆地源区演化的新见解，我们提供了有关重矿物组的新数据，从浊流充填阶段到哈卡盆地最年轻的冲积扇系统，并整合了重矿物可用的砂岩岩画签名。我们的结果表明，在整个盆地演化过程中，超稳定的Ap-Zrn-Tur-Rt组合占主导地位。然而，冲积沉积后期导致其他更不稳定的重矿物增加，指出了特定的源区属于轴向和北比利牛斯山脉地区，并为重矿物组对沉积物循环的反应提供了新的见解。此外，我们评估了成岩叠印与物源信号的程度，并推断至少在PeñaOroel和San Juan de laPeña断层中，由于层内溶解造成的不稳定重矿物的损失可以忽略不计。最后，我们为以下观点提供了新的证据：始新世晚期，横向排水系统的分水道位于北比利牛斯山脉地区，当时在比利牛斯山中西部暴露了由古生代基底构成的区域。我们的发现为褶皱-冲断带附近的回收前陆盆地的重矿物响应提供了新的见解。