Strain Rates and Tectonic Processes in the Track of the Yellowstone Hotspot

黄石热点及北部盆地和山脉轨迹的应变率和构造过程该项目综合了沿北部盆地和山脉的黄石热点轨迹的大地测量、地质、火山和地震资料，以评估伸展变形过程。北部盆地和山脉揭示了由黄石火山作用叠加的伸展造成的地壳变形。热点火山作用通过增加热流、减少地震活动和距离热点当前位置350公里的基性岩脉侵入来影响其轨迹上的伸展过程。黄石热区显著改变了蛇河平原周围盆地和山脉地区的地壳组成。已经提出了几个假设来解释被非常活跃的地区包围的蛇河平原明显的地震平静。该项目包括重新评估60个GPS古迹，并将这些测量与涵盖Snake River平原和邻近盆地和山脉的广泛数据集相结合。这些测量被用来定义相干应变区、估计应变率、预测断层滑动和评估块体运动，从而约束北部盆地内的构造过程以及黄石热点的范围和轨迹。

Strain Rates and Tectonic Processes in the Track of the Yellowstone Hotspot and Northern Basin and Range This project integrates geodetic, geologic, volcanic and seismologic data along the track of the Yellowstone Hotspot in the Northern Basin and Range to assess extensional deformation processes. The Northern Basin and Range reveals crustal deformation resulting from extension that has been overprinted by Yellowstone volcanism. Hotspot volcanism influences extensional processes in its track through increased heat flow, decreased earthquake activity and mafic dike intrusions over distances of 350 km from the hotspot's current position. The Yellowstone Hotspot has significantly modified the composition of the crust in the Snake River Plain from the surrounding basin and range regions. Several hypotheses have been put forth to explain the pronounced seismic quiescence of the Snake River Plain surrounded by very active regions. The project includes resurveys of 60 GPS monuments and combination of these measurements with an extensive data set covering the Snake River Plain and adjacent basin and range. These measurements are used used to define regions of coherent strain, estimate strain rates, predict fault slip and assess block motions, thereby constraining the tectonic processes within the Northern Basin and Range and track of the Yellowstone Hotspot.