The Cenozoic depositional history of the Pelotas Basin was driven by the interaction between the spreading processes of the Atlantic Ocean and the formation of the Andean Cordillera. We integrated seismic interpretation and backstripping techniques with evaluation of spreading rates in the South Atlantic and subduction beneath the Andes to unveil the main climatic, eustatic and active tectonic events in the Cenozoic. The achieved results integrated with regional geology and Cenozoic history data show the tectonic control that the Andean Cordillera exerted over the Pelotas Basin's passive margin. On the other hand, climatic and glacioeustatic changes that influenced the Pelotas Basin's sedimentation were mostly controlled by the tectonic opening of Drake Passage and the consequent onset of the Antarctic Circumpolar Current. These processes were directly connected to motions of the Antarctic, South American, and Nazca plates since the beginning of the Cenozoic. Our results allow us to detail the geological events of the Pelotas Basin and more accurately define its eustatic, tectonic, and climatic controls by closely observing the interaction between compressive tectonics and passive margins.

佩洛塔斯盆地新生代沉积历史是由大西洋扩张过程与安第斯山脉形成之间的相互作用驱动的。我们将地震解释和回溯技术与南大西洋扩张率的评估和安第斯山脉下方的俯冲相结合，以揭示新生代的主要气候、海平面和活动构造事件。所得结果与区域地质和新生代历史数据相结合，表明安第斯山脉对佩洛塔斯盆地被动边缘施加了构造控制。另一方面，影响佩洛塔斯盆地沉积的气候和冰川运动变化主要受德雷克海峡的构造开口和随之而来的南极绕极流的开始控制。这些过程与新生代开始以来南极、南美和纳斯卡板块的运动直接相关。我们的结果使我们能够通过密切观察压缩构造和被动边缘之间的相互作用来详细说明佩洛塔斯盆地的地质事件，并更准确地定义其海平面、构造和气候控制。