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.

阿根廷东部南大西洋被动大陆边缘（SAPCM-A）的特点是地势非常平坦，没有发育的悬崖。地形和盆地演化的时间和原因仅部分为人所知。使用热运动学模型进行热年代学研究将有助于了解 SAPCM-A 的原因和时间。与 SAPCM 的 NE-SW 走向方向垂直，两个 SE-NW 走向的盆地（科罗拉多州萨拉多）被 SE-NW 走向的坦迪尔山和本塔纳山分开。这项研究将与 R. di Primio 博士和 M. Scheck-Wenderoth 博士的 SPP 研究项目合作，重点研究萨拉多和科罗拉多盆地陆上和近海部分的温度和反演历史。该研究项目将热年代测定技术以及计算机代码 Petromod 和 Petrotrack 的一维建模应用于各个钻探地点的岩屑，将深入了解盆地的冷却、反转和隆起历史。此外，我们还将在两个盆地之间的坦迪尔山和本塔纳山的地表露头上应用相同的热年代学技术和 3-D 热运动学建模 (Pecube)。该区也是研究断裂带（转换断层、转换带）对SAPCM演化影响的重点区域。结合年龄、冷却、折返/反转和隆升率以及盆地和丘陵的模型，将能够限制 SAPCM 这种独特地形的演变和原因。因此，本项目将为SPP岩石圈和地幔尺度模拟项目提供新的数据。接下来，我们将把新数据与南非 SAPCM 发展过程中发布的数据进行比较。