Global tectonic and climatic models for the Permian-Triassic boundary (PTB) are highly debated. One of the most disputed topics is the temperature increase associated with CO₂ emissions generated by the Siberian Trap volcanism and its potential influence on chemical weathering and associated variations in sediment fluxes. By integrating crustal architecture, plate modelling, structural kinematics, and two climatic models, we reconstruct the drainage evolution of Variscan tectonostratigraphic units from the SE portion of the Germanic Basin, from which we also extract the parameters necessary to calculate sediment flux across a time-scale of 28 Ma (Guadalupian-Lower Triassic). We reconstruct the sedimentary response to climatic and tectonic perturbations using Quantitative Provenance Analysis (QPA) and integrate compositional data into a sedimentological framework, paleodrainage and paleoclimatic models. Raman heavy mineral analysis, as well as geochronology and geochemistry of detrital apatite, zircon, and rutile, document variation in drainage lithologies and sediment flux which are controlled by regional extensional tectonics and increasingly humid conditions at the PTB. The sedimentary successions of the SE Germanic Basin record climatic perturbations on a 10⁴ years timescale, while the effects of tectonics are visible on a 10⁶ years timescale. The interplay of climate, tectonics and lithology, and their effects on sediment production and drainage evolution resulted in changes in sediment flux from 2.3 Mt./yr during the Guadalupian (Capitanian), to 3.80 Mt./yr in the Lopingian (Changhsingian) to 7.44 Mt./yr at the end of the Lower Triassic (Olenekian). The multifaceted workflow provided in this study represents the first step towards more precise reconstructions of sediment routing systems in deep-time and provides the first ground-truthed quantification of sediment flux across the Permian-Triassic Boundary.

二叠纪-三叠纪边界 (PTB) 的全球构造和气候模型备受争议。最具争议的话题之一是与 CO ₂相关的温度升高西伯利亚圈闭火山活动产生的排放及其对化学风化和沉积物通量相关变化的潜在影响。通过整合地壳结构、板块建模、结构运动学和两种气候模型，我们重建了日耳曼盆地东南部的瓦里斯坎构造地层单元的排水演化，从中我们还提取了计算一段时间内沉积物通量所需的参数 - 28 Ma（瓜达卢普阶-下三叠纪）。我们使用定量来源分析 (QPA) 重建沉积物对气候和构造扰动的响应，并将成分数据整合到沉积学框架、古排水和古气候模型中。拉曼重矿物分析，以及碎屑磷灰石、锆石和金红石的年代学和地球化学，记录受区域伸展构造和 PTB 日益潮湿条件控制的排水岩性和沉积物通量的变化。SE 日耳曼盆地的沉积序列记录了 10 年的气候扰动⁴ 年的时间尺度，而构造的影响在 10 ⁶ 年的时间尺度上是可见的。气候、构造和岩性的相互作用及其对沉积物产生和排水演化的影响导致沉积物通量从瓜达鲁普阶（卡皮塔阶）的 2.3 Mt./yr 变化到洛平阶（长兴阶）的 3.80 Mt./yr 7.44 Mt./yr 在下三叠纪末期（Olenekian）。本研究中提供的多方面工作流程代表了在深时更精确地重建沉积物路径系统的第一步，并提供了跨二叠纪-三叠纪边界的沉积物通量的第一个地面真实量化。