Rates, causes, and dynamic of long-term landscape evolution of the South Atlantic passive continental margin, Brazil and Namibia, as revealed by thermo-kinematic numerical modeling

该项目的目的是量化巴西东南部和纳米比亚西北部南大西洋被动大陆边缘的长期地貌演变。良好的陆上露头条件以及圣保罗和阿雷格里港之间以及从纳米比亚过渡到安哥拉(陆上沃尔维斯海脊)的完整裂谷到裂谷后的档案，使得能够高精度地量化身体折返和抬升速率，影响物性参数、长期作用力和过程-反应系统。拟议的研究项目将整合巴西和纳米比亚公布的热年代学数据，DFG资助的研究项目揭示的新的详细和空间密度高的热年代学数据集，并测试最近发表的关于裂谷边缘长期地貌演变原因的新概念。气候-陆缘-地幔耦合过程-响应系统是内力和外力相互作用的结果，内力和外力的相互作用与地幔过程驱动南大西洋裂谷向被动大陆边缘演化和早、晚白垩世气候盛期以来的气候变化有关。重点研究了诸如Florianopolis断裂带(FFZ)等长期活动的转换断层对SAPCM的长期地形演化的影响，并将通过热运动学三维模拟(软件代码PECUBE和FastCAPE)获得具有过程速率的长期地形演化模型。对照真实的热年代学和地貌数据集测试针对多维参数空间获得的模型解，可以限制参数速率和值的最可能的组合。数据和模型将允许分离外生和内生力量及其过程速率。

The aim of the project is to quantify the long-term landscape evolution of the South Atlantic passive continental margin (SAPCM) in SE-Brazil and NW-Namibia. Excellent onshore outcrop conditions and complete rift to post-rift archives between Sao Paulo and Porto Alegre and in the transition from Namibia to Angola (onshore Walvis ridge) allow a high precision quantification of exhumation, and uplift rates, influencing physical parameters, long-term acting forces, and process-response systems. The proposed research project will integrate the published thermochronological data from Brazil and Namibia, the new detailed and spatially dense thermochronological data set revealed by the DFG-financed research project and test lately published new concepts on causes of long-term landscape evolution at rifted margins. The climate-continental margin-mantle coupled process-response system is caused by the interaction between endogenous and exogenous forces, which are related to the mantle process driven rift to drift to passive continental margin evolution of the South Atlantic, and the climate change since the Early/Late Cretaceous climate maximum. Special emphasis will be given to the influence of long-living transform faults such as the Florianopolis Fracture Zone (FFZ) on the long-term topography evolution of the SAPCM's. A long-term landscape evolution model with process rates will be achieved by thermokinematic 3 D modeling (software code PECUBE and FastCape). Testing model solutions obtained for a multidimensional parameter space against the real thermochronological and geomorphological data set, the most likely combinations of parameter rates, and values can be constrained. The data and models will allow separating the exogenous and endogenous forces and their process rates.