A Detailed Geometric and Kinematic Analysis of a Major Accommodation Zone in Highly Extended Terrane: Central Black and Southern Eldorado Mountains, AZ and NV

大陆裂陷的特征是地壳构造不对称，在大部分伸展地体中以倾斜断块为主。调节带有利于裂谷不对称意义上的周期性反转，包括块体倾斜主导方向的反转和可能的区域滑脱体系倾斜方向的反转。上下板块岩石的移动量和方向决定了调节带沿线的变形样式，因此对调节带的研究可以为单个拆离地体的运动演化提供约束。该项目是对亚利桑那州黑山和内华达州埃尔多拉多山脉的一个暴露良好的住宿带进行详细的测绘、结构分析和古地磁调查。对该容纳带的这些研究可能对大陆裂谷的几何学和过程有重要的影响。

Continental rifting is characterized by structural asymmetry of the earth's crust as evidenced by the predominance of tilted fault- blocks in most extended terranes. Accommodation zones facilitate periodic reversals in the sense of rift asymmetry, including inversion in the dominant direction of block-tilting and possibly reversal in the dip of regional detachment systems. The amount and direction of movement of the upper and lower plate rocks will dictate the deformational style along the accommodation zone, therefore studies of such zones can provide constraints on the kinematic evolution of individual detachment terranes. This project is a detailed mapping, structural analysis and paleomagnetic investigation of a well-exposed accommodation zone in the Black Mountains of Arizona and the Eldorado Mountains of Nevada. These investigations of this accommodation zone may have important ramifications for the geometry and processes attending continental rifting.