气候变化领域集成服务门户(CCPortal): Serial ruptures of the San Andreas fault, Carrizo Plain, California, revealed by three-dimensional excavations

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DOI	10.1029/2004JB003601
	Serial ruptures of the San Andreas fault, Carrizo Plain, California, revealed by three-dimensional excavations
	Liu-Zeng, J; Klinger, Y; Sieh, K; Rubin, C; Seitz, G
发表日期	2006
ISSN	2169-9313
EISSN	2169-9356
卷号	111 期号:B2
英文摘要	[1] It is poorly known if fault slip repeats regularly through many earthquake cycles. Well-documented measurements of successive slips rarely span more than three earthquake cycles. In this paper, we present evidence of six sequential offsets across the San Andreas fault at a site in the Carrizo Plain, using stream channels as piercing lines. We opened a latticework of trenches across the offset channels on both sides of the fault to expose their subsurface stratigraphy. We can correlate the channels across the fault on the basis of their elevations, shapes, stratigraphy, and ages. The three-dimensional excavations allow us to locate accurately the offset channel pairs and to determine the amounts of motion for each pair. We find that the dextral slips associated with the six events in the last millennium are, from oldest to youngest, >= 5.4 +/- 0.6, 8.0 +/- 0.5, 1.4 +/- 0.5, 5.2 +/- 0.6, 7.6 +/- 0.4 and 7.9 +/- 0.1 m. In this series, three and possibly four of the six offset values are between 7 and 8 m. The common occurrence of 7 - 8 m offsets suggests remarkably regular, but not strictly uniform, slip behavior. Age constraints for these events at our site, combined with previous paleoseismic investigations within a few kilometers, allow a construction of offset history and a preliminary evaluation of slip- and time-predictable models. The average slip rate over the span of the past five events ( between A. D. 1210 and A. D. 1857.) has been 34 mm/yr, not resolvably different from the previously determined late Holocene slip rate and the modern geodetic strain accumulation rate. We find that the slip- predictable model is a better fit than the time-predictable model. In general, earthquake slip is positively correlated with the time interval preceding the event. Smaller offsets coincide with shorter prior intervals and larger offset with longer prior intervals.
关键词	EARTHQUAKE RECURRENCE GREAT EARTHQUAKES LATERAL OFFSETS SLIP COMPLEXITY C-14 AGES MODEL SEISMICITY PALEOSEISMOLOGY DEFORMATION CALIBRATION
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000235995100002
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257453
推荐引用方式 GB/T 7714	Liu-Zeng, J,Klinger, Y,Sieh, K,et al. Serial ruptures of the San Andreas fault, Carrizo Plain, California, revealed by three-dimensional excavations[J]. 中国科学院青藏高原研究所,2006,111(B2).
APA	Liu-Zeng, J,Klinger, Y,Sieh, K,Rubin, C,&Seitz, G.(2006).Serial ruptures of the San Andreas fault, Carrizo Plain, California, revealed by three-dimensional excavations.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,111(B2).
MLA	Liu-Zeng, J,et al."Serial ruptures of the San Andreas fault, Carrizo Plain, California, revealed by three-dimensional excavations".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 111.B2(2006).