Comparative analysis of the Late Cretaceous to Recent post-breakup basin evolution of the South-American and S-African margin of the southern Atlantic

本项目重点比较了巴西南部近海Pelotas和Santos盆地破碎后的构造和地层记录，以及纳米比亚和安哥拉南部近海破碎后的大陆边缘序列。对Florianopolis - Walvis Ridge火山复合体南部和北部选定的具有代表性的二维地震样带进行构造地层分析，将为控制破碎后海上边缘发育的关键因素提供全面的盆地到盆地的文件，包括边缘配置、随时间的沉降发展、沉积物流入和储存模式、盆地填充类型(例如盐与非盐体系；碳酸盐丰富vs.碎屑为主的系统)和海平面波动。构造-地层联合反剥蚀法将综合、量化和权衡上述因素对不同研究点边缘发育的影响。

This project focuses on a regional comparison between the post-breakup tectonic and stratigraphic record archived in the Pelotas and Santos basins offshore southern Brazil and the post-breakup continental margin successions of offshore Namibia and southern Angola. Tectonic-stratigraphic analysis of selected, representative 2D seismic transects both south and north of the Florianopolis - Walvis Ridge volcanic complex will provide a comprehensive basin-to-basin documentation of the key factors controlling the post-breakup offshore margin development including the margin configuration, subsidence development through time, sediment influx and storage patterns, type of basin fill (e.g. salt vs. non-salt systems; carbonate-rich vs. clastics-dominated systems) and sea-level fluctuations. Combined tectonic-stratigraphic backstripping will be used to integrate, quantify and weigh the influence of the above factors on the margin development at the different study sites.