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、挖掘、隆起和长期动态地形演变。在圣保罗和阿雷格里港之间以及纳米比亚到安哥拉的过渡地带（陆上沃尔维斯山脊），出色的陆上露头条件和完整的裂谷和后裂谷档案可以对长期过程和过程响应系统进行高精度量化。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-大陆边缘-地幔耦合过程-响应系统是由内、外源力量相互作用形成的，与南大西洋地幔过程驱动的裂谷-漂移-“被动”大陆边缘演化以及早/晚白垩世以来的气候变化有关。特别强调的是长寿命转换断层，如Florianopolis断裂带（FFZ）对SAPCM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路径建模，将确定热历史、挖掘历史和隆升历史。通过热运动学三维建模（软件代码PECUBE），获得具有过程速率的长期景观演化模型。针对真实的热年代学和地貌数据集测试多维参数空间的模型解，参数率和值的最可能组合可能受到约束。数据和模型将允许分离外源力和内源力及其过程速率。在研究的延续（2013-2016）中，重点将放在整合所有现有和已发表的数据（包括其他spp研究项目的数据）的长期景观演变数值模型中，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.