Slip-rate measurements on the Karakorum Fault may imply secular variations in fault motion

被引：188
作者：
Chevalier, ML
Ryerson, FJ [1 ]
Tapponnier, P
Finkel, RC
Van der Woerd, J
Li, HB
Liu, Q
机构：
[1] Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94550 USA
[2] Inst Phys Globe Strasbourg, CNRS, UMR 7578, Lab Tecton Mecan Lithosphere, F-75252 Paris 05, France
[3] Inst Phys Globe Strasbourg, CNRS, UMR 7516, F-67084 Strasbourg, France
[4] Chinese Acad Geol Sci, Inst Geol, Lab Continental Dynam, Beijing 100037, Peoples R China
[5] Total Fina Elf, Total Explorat China, Beijing 100004, Peoples R China
来源：
SCIENCE | 2005年 / 307卷 / 5708期
关键词：
D O I：
10.1126/science.1105466
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Beryllium-10 surface exposure dating of offset moraines on one branch of the Karakorum Fault west of the Gar basin yields a long-term (140- to 20-thousand-year) right-lateral slip rate of similar to10.7 +/- 0.7 millimeters per year. This rate is 10 times larger than that inferred from recent InSAR analyses (similar to1 +/- 3 millimeters per year) that span similar to8 years and sample all branches of the fault. The difference in slip-rate determinations suggests-that large rate fluctuations may exist over centennial or millennial time scales. Such fluctuations would be consistent with mechanical coupling between the seismogenic, brittle-creep, and ductile shear sections of faults that reach deep into the crust.
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收藏
页码：411 / 414
页数：4
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