北圣克鲁斯山脉的演化是由地壳沿圣安德烈亚斯断层弯曲处的对流引起的。

Evolution of the northern santa cruz mountains by advection of crust past a san andreas fault bend.

出版信息

Science. 1990 Jul 27;249(4967):397-401. doi: 10.1126/science.249.4967.397.

DOI:10.1126/science.249.4967.397

Abstract

The late Quaternary marine terraces near Santa Cruz, California, reflect uplift associated with the nearby restraining bend on the San Andreas fault. Excellent correspondence of the coseismic vertical displacement field caused by the 17 October 1989 magnitude 7.1 Loma Prieta earthquake and the present elevations of these terraces allows calculation of maximum long-term uplift rates 1 to 2 kilometers west of the San Andreas fault of 0.8 millimeters per year. Over several million years, this uplift, in concert with the right lateral translation of the resulting topography, and with continual attack by geomorphic processes, can account for the general topography of the northern Santa Cruz Mountains.

摘要

加利福尼亚州圣克鲁斯附近的晚更新世海阶地反映了与圣安德烈亚斯断层附近的约束弯曲有关的隆起。1989 年 10 月 17 日发生的里氏 7.1 级洛马普列塔地震引起的同震垂直位移场与这些阶地的现有高程之间存在极好的对应关系，这使得我们能够计算出圣安德烈亚斯断层以西 1 至 2 公里范围内的最大长期抬升速率为每年 0.8 毫米。在几百万年的时间里，这种抬升，加上由此产生的地形的右旋平移，以及地貌过程的持续侵蚀，解释了北圣克鲁斯山脉的总体地形。