Paleomagnetic Investigation of the Atacama Fault, Chile

走滑断层通常发生在斜辐合环境中，导致显著的边缘平行平移。以南美洲西海岸为例，预计侏罗纪至近代的左旋右走滑断裂将同时发生。然而，现有的古地磁资料表明，沿与造山带平行的阿塔卡马大断层，地块有局部旋转，但平移很少。该项目将研究从侏罗纪到中第三纪的层状火山岩，以探测和解释断层中鲜为人知的部分的旋转和平移。结果有望记录构造平移在这个活动造山带中的作用，并阐明沿着这个主要的造山带平行断层的旋转但很少平移的奇怪初步结果。

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.