Thermal history, exhumation, uplift, and long-term landscape evolution of the South Atlantic passive continental margin in south-eastern Argentina and comparison with SW-South Africa

阿根廷东南部南大西洋被动大陆边缘的热历史、折返、隆升和长期地貌演化以及与西南非洲的比较

• 批准号: 172865236
• 负责人: Professor Dr. Ulrich A. Glasmacher
• 金额: --
• 依托单位: Institut für Geowissenschaften
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/172865236?language=en
• 关键词: Thermal; history; exhumation; uplift; long

The eastern Argentina South Atlantic passive continental margin (SAPCM-A) is characterized by a very flat topography without an escarpment developed. The timing and causes of the topography and basin evolution are only partly known. Thermochronological research with thermo-kinematic modeling will help to understand the causes and timing of the SAPCM-A. Perpendicular to the NE-SW trending direction of the SAPCM, two SE-NW trending basins (Salado, Colorado) are separated by the SE-NW trending Tandill and Ventana Hills. In cooperation with the SPP-research projects of Dr. R. di Primio and Dr. M. Scheck-Wenderoth, this research will focus on the temperature and inversion history of the on- and offshore part of the Salado and Colorado Basin. Applying thermochronological dating techniques, and 1-D modeling by the computer code Petromod and Petrotrack to cuttings from various drill sites, the research project will provide insight into the cooling, inversion, and uplift history of the basins. In addition, we will apply the same thermochronological techniques, and 3-D thermo-kinematic modeling (Pecube) on the surface outcrops in the Tandill and Ventana Hills between both basins. This area is also a key area to study the influence of Fracture Zones (transform faults, transfer zones) on the SAPCM evolution. Combining the ages, cooling, exhumation/inversion, and uplift rates, and models from the basins and the hills will allow constraining the evolution and the causes for this unique topography at the SAPCM. Therefore, this project will provide new data for the lithosphere and mantle scale modeling projects in the SPP. In a continuation we will compare the new data with those published on the evolution of the SAPCM in South Africa.

阿根廷东部的南大西洋被动大陆边（SAPCM-A）的特点是地形非常平坦，没有形成陡崖。地形和盆地演化的时间和原因仅部分已知。热动力学模型的热年代学研究将有助于理解SAPCM-A的原因和时间。在SAPCM的NE-SW走向附近，两个SE-NW走向的盆地（萨拉多，科罗拉多）被SE-NW走向的坦迪尔山和文塔纳山分开。通过与R. di Primio和M. Scheck-Wenderoth，这项研究将集中在萨拉多和科罗拉多盆地的温度和逆温历史上和海上的一部分。应用热年代测定技术，并通过计算机代码Petromod和Petrotrack对来自各个钻井现场的岩屑进行一维建模，该研究项目将深入了解盆地的冷却，反转和隆起历史。此外，我们将采用相同的热年代学技术，和3-D热运动学建模（Pecube）在两个盆地之间的坦迪尔和Ventana山的地表露头。该区也是研究断裂带（转换断层、转换带）对SAPCM演化影响的重点地区。结合年龄，冷却，折返/反转，和隆起率，以及模型从盆地和丘陵将允许限制的演变和原因，这种独特的地形在SAPCM。因此，本项目将为中国科学院岩石圈和地幔尺度的数值模拟提供新的资料。在续文中，我们将比较新的数据与那些发表在南非的SAPCM的演变。