High-resolution elevation surveys of deformed late Pleistocene shorelines and new luminescence dating provide improved constraints on spatiotemporal patterns of distributed slip between normal and strike-slip faulting in southern Owens Valley, eastern California. A complex array of five subparallel faults, including the normal Sierra Nevada frontal fault and the oblique-normal Owens Valley fault, collectively form an active pull-apart basin that has developed within a dextral transtensional shear zone. Spatiotemporal patterns of slip are constrained by post–IR-IRSL (post-infrared–infrared stimulated luminescence) dating of a 40.0 ± 5.8 ka highstand beach ridge that is vertically faulted and tilted up to 9.8 ± 1.8 m and an undeformed suite of 11–16 ka beach ridges. The tectono-geomorphic record of deformed beach ridges and alluvial fans indicates that both normal and dextral faulting occurred between the period of ca. 16 and 40 ka, whereas dextral faulting has been the predominant style of slip since ca. 16 ka. A total extension rate of 0.7 ± 0.2 mm/yr resolved in the N72°E direction across all faults in Owens Lake basin is within error of geodetic estimates, suggesting extension has been constant during intervals of 101–104 yr. A new vertical slip rate of 0.13 ± 0.04 m/k.y. on the southern Owens Valley fault from deformed 160 ± 32 ka shoreline features also suggests constant slip for intervals up to 105 yr when compared to paleoseismic vertical slip rates from the same fault segment. This record supports a deformation mechanism characterized by steady slip and long interseismic periods of 8–10 k.y. where the south-central Owens Valley fault and Sierra Nevada frontal fault form a parallel fault system.

中文翻译：

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东部东部晚更新世海岸线的变形表明了欧文斯山谷南部分布滑移的时空格局

对变形的晚更新世海岸线和新的发光年代进行的高分辨率高程调查为加利福尼亚东部欧文斯谷南部正断层和走滑断层之间的分布滑移的时空分布提供了改善的约束。由五个内平行断层组成的复杂阵列，包括正常的内华达山脉前部断层和倾斜的垂直欧文斯谷断层，共同形成了一个活跃的拉分盆地，该盆地在右旋张性剪切带内发育。滑移的时空模式受到IR-IRSL（红外-红外-激发光）的限制，该红外测年为40.0±5.8 ka高处滩脊的垂直断层，倾斜至9.8±1.8 m，未变形的11– 16 ka海滩山脊。变形的滩脊和冲积扇的构造-地貌记录表明，大约在两个月之间，正断层和右断层都发生了。16和40 ka，而右旋断层以来一直是滑动的主要样式。16 ka。在欧文斯湖盆地所有断层上，N72°E方向总的扩展速度为0.7±0.2 mm / yr，这在大地测量估计值的误差内，这表明扩展在101–104年的间隔内保持恒定。与相同断层段的古地震垂直滑移率相比，南部欧文斯河谷断层从变形的160±32 ka海岸线特征获得的新的垂直滑移率为0.13±0.04 m / ky，这也表明在高达105 yr的间隔内，恒定的滑移间隔长达105年。该记录支持以稳定滑移和8-10 ky的长地震周期为特征的变形机制。