Paleomagnetic Investigation of the Atacama Fault, Chile

走滑断层通常发生在斜向汇聚环境中，导致明显的边缘平行平移。南美洲西海岸是一个例子，在那里，侏罗纪到最近的左旋右行走滑断层都被预计到了。然而，现有的古地磁数据表明，地块局部旋转，但沿造山带平行的大型阿塔卡马断层几乎没有平移。该项目将研究层状火山岩，年龄范围从侏罗纪到中第三纪，以检测和解释沿鲜为人知的断层部分的旋转和平移。预计结果将证明构造平移在这一活动造山带中的作用，并阐明沿这条主要的造山带平行断层旋转但平移很少的奇怪的初步结果。

Strike-slip faults commonly occur in oblique convergence settings resulting in significant margin-parallel translation. The western coast of South America is an example where both sinistral dextral strike-slip faulting of Jurassic to the recent is expected. However, existing paleomagnetic data indicates local rotations of blocks but little translation along the large orogen-parallel Atacama Fault. This project will investigate layered volcanic rocks ranging in age from Jurassic to mid-Tertiary to detect and interpret rotations and translations along poorly known portion of the fault. Results are expected to document the role of tectonic translations in this active orogen and to shed light on the curious preliminary result of rotations but little translations along this major orogen-parallel fault.