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.

我们的目标是帮助我们了解当今阿尔卑斯山的深层结构，其演变和表面对深层过程的反应。而热年代学的造山带中的逆冲岩片的叠加信号可以压倒与地幔过程有关的微妙的信号，前陆盆地记录大波长的沉降或隆起。我们建议使用来自磨拉石盆地的数据来约束地幔动力学对地表演化的贡献。构造力和地幔作用在阿尔卑斯山沿着走向上变化很大，它们在相邻前陆盆地的埋藏和折返历史中的表现也是如此。磨拉石盆地在其初始阶段为典型的前陆盆地之后，在新近纪经历了大量的折返（~2-3 km），这只能部分地用已知的构造过程来解释。整个盆地已被挖掘到一定程度，足以使低温热计时器以高分辨率绘制挖掘的时间和速度。我们的目标是建立在我们的工作，在西部的盆地，以量化中央磨拉石盆地的折返历史，使用低温热年代学沿着三个断面。我们将使用一个新的概率热模型，专门设计用于沉积盆地的研究结合构造重建量化的时间和折返率。通过这种组合，我们将量化构造，气候和地幔驱动器的贡献，以折返的磨拉石盆地，并提供必要的输入，以测试的主要假设的SPP。 该建议与研究主题RT-1、2和4相联系，并被置于活动字段E中，与条带D的结果有密切联系。