FB-4D: Foreland basin evolution records the effects of plate reorganization, surface evolution and crustal deformation on mountain building

FB-4D：前陆盆地演化记录了板块重组、地表演化和地壳变形对造山的影响

• 批准号: 363551335
• 负责人: Professor Dr. Christoph von Hagke, since 8/2020
• 金额: --
• 依托单位: Fachbereich Geographie und Geologie
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/363551335?language=en
• 关键词: FB; 4D; Foreland; basin; evolution

We aim to contribute to our understanding of the present day deep structure of the Alps, its evolution and the surface response to deep seated processes. Whereas the thermochronological signal of the stacking of thrust sheets in the orogen can overwhelm subtle signals related to mantle processes, the foreland basin records large-wavelength subsidence or uplift. We propose to use data from the Molasse basin to constrain the contribution of mantle dynamics to surface evolution. Tectonic forces and mantle processes vary strongly along strike in the Alps, and so does their expression in the burial and exhumation history of the adjacent foreland basin. Following its initial stage as a classical foreland basin, the Molasse basin has undergone substantial exhumation (~2-3 km) during the Neogene, which can only partly be explained by known tectonic processes. The entire basin has been exhumed to a degree that is sufficient for low-temperature thermochronometers to map the timing and rate of exhumation at high resolution. We aim to build on our work in the western part of the basin to quantify the exhumation history of the central Molasse Basin using low-temperature thermochronology along three transects. We will quantify the timing and rate of exhumation using a new probabilistic thermal model specifically designed for studies of sedimentary basins in combination with tectonic reconstructions. With this combination, we will quantify the contribution of tectonic, climatic and mantle drivers to exhumation of the Molasse basin and provide essential input to testing the main hypothesis of the SPP. This proposal links to the research themes RT-1, 2 and 4, and is placed in Activity Field E with close link to results from Swath D.

我们旨在为我们理解阿尔卑斯山的深层结构，其演变以及对深度座位过程的表面反应做出贡献。尽管基因中推力板堆积的热量信号可能压倒与地幔过程有关的微妙信号，而前陆盆地记录了大波长沉降或隆起。我们建议使用来自Molasse盆地的数据来限制地幔动力学对表面进化的贡献。构造力量和地幔过程在阿尔卑斯山的罢工中差异很大，它们在相邻前陆盆地的葬礼和挖掘历史上的表达也有所不同。在作为经典前盆地盆地的初始阶段之后，莫拉斯盆地在新近纪期间经历了大量挖掘（〜2-3 km），只能通过已知的构造过程来部分解释。将整个盆地挖掘到足以使低温热化学计的程度绘制高分辨率时的定时和挖掘速率。我们旨在基于盆地西部的工作，以使用沿三个样带的低温热量学量化中央莫拉斯盆地的挖掘历史。我们将使用专门针对沉积盆地研究的新概率热模型来量化挖掘的时间和速率，并结合构造重建。通过这种组合，我们将量化构造，气候和地幔驱动因素对Molasse盆地挖掘的贡献，并为测试SPP的主要假设提供了必不可少的输入。 该提案链接到研究主题RT-1、2和4，并将其放置在活动领域E中，与SwathD的结果紧密相关。