Thermal history, exhumation, uplift, and long-term landscape evolution of the western south Atlantic passive continental margin, Brazil and Namibia-Angola

该项目的目的是量化巴西和纳米比亚-安哥拉南大西洋被动大陆边缘(SAPCM)的温度、折返、隆起和长期动态地形演变。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)的完整裂谷后记录，使长期过程和过程响应系统得以高精度量化。我们将整合巴西和纳米比亚公布的热年代学数据。这种气候-陆缘-地幔耦合过程-响应系统是与南大西洋地幔过程驱动的裂谷漂移-“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的内生和外生力量相互作用的结果。重点讨论了诸如弗洛里亚诺利斯断裂带等长期活动的转换断层对S断裂长期动态地形演化的影响，结合磷灰石和锆石裂变径迹和(U-Th)/He热年代学数据，结合T-T路径模拟，S将确定热历史、折返历史和隆升历史。通过热运动学3-D模拟(软件代码PECUBE)，将获得具有过程速率的长期景观演变模型。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。这些数据和模型将允许分离外生和内生的力量及其加工速率。在这项研究的继续阶段(2013-2016年)，将重点放在将所有现有和已公布的数据(包括其他SPP研究项目的数据)整合到一个长期地貌演变的数值模型中，以量化地表响应率。

The aim of the project is to quantify the temperature, exhumation, uplift, and long-term dynamic topography evolution of the South Atlantic passive continental margin (SAPCM) in Brazil and Namibia-Angola. 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 long-term processes and process-response systems. We will integrate the published thermochronological data from Brazil and Namibia. This climate-continental margin-mantle coupled process-response system is caused by the interaction between endogenic and exogenic forces, which are related to the mantle-process driven rift – drift – “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 dynamic topography evolution of the SAPCM s. A combination of apatite and zircon fission-track and (U-Th)/He thermochronological data with modeling of t-T path´s will determine the thermal, exhumation, and uplift history. A long-term landscape evolution model with process rates will be achieved by thermo-kinematic 3-D modeling (software code PECUBE). 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 to separate the exogenic and endogenic forces and their process rates. In a continuation of the research (2013-2016), strong emphasis will be given to the integration of all existing and published data (including those data of other SPP-research projects) in a numerical model for the long-term landscape evolution to quantify the surface response rates.