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

被引：185

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.

引用

页码：411 / 414

页数：4

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