Slip-Rate Measurements on the Karakorum Fault May Imply Secular Variations in Fault Motion

by: ML Chevalier, FJ Ryerson, P Tapponnier, RC Finkel, J Van Der Woerd, Li Haibing, Liu Qing

Science, Vol. 307, No. 5708. (21 January 2005), pp. 411-414.

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Abstract

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 [~]10.7 +/- 0.7 millimeters per year. This rate is 10 times larger than that inferred from recent InSAR analyses ([~]1 +/- 3 millimeters per year) that span [~]8 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. 10.1126/science.1105466

@article{ChevalierScience05, abstract = {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 [~]10.7 +/- 0.7 millimeters per year. This rate is 10 times larger than that inferred from recent InSAR analyses ([~]1 +/- 3 millimeters per year) that span [~]8 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. 10.1126/science.1105466}, author = {Chevalier, M. L. and Ryerson, F. J. and Tapponnier, P. and Finkel, R. C. and Van Der Woerd, J. and Haibing, Li and Qing, Liu }, citeulike-article-id = {788305}, doi = {10.1126/science.1105466}, journal = {Science}, keywords = {cosmogenic, secular\_variation, slip\_rate}, month = {January}, number = {5708}, pages = {411--414}, posted-at = {2006-08-07 02:23:50}, priority = {2}, title = {Slip-Rate Measurements on the Karakorum Fault May Imply Secular Variations in Fault Motion}, url = {http://dx.doi.org/10.1126/science.1105466}, volume = {307}, year = {2005} }

RIS record

TY - JOUR ID - ChevalierScience05 L3 - citeulike-article-id:788305 TI - Slip-Rate Measurements on the Karakorum Fault May Imply Secular Variations in Fault Motion JF - Science VL - 307 IS - 5708 SP - 411 EP - 414 N2 - 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 [~]10.7 +/- 0.7 millimeters per year. This rate is 10 times larger than that inferred from recent InSAR analyses ([~]1 +/- 3 millimeters per year) that span [~]8 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. 10.1126/science.1105466 KW - cosmogenic KW - secular_variation KW - slip_rate AU - Chevalier, ML AU - Ryerson, FJ AU - Tapponnier, P AU - Finkel, RC AU - Van Der Woerd, J AU - Haibing, Li AU - Qing, Liu PY - 2005/01/21/ UR - http://dx.doi.org/10.1126/science.1105466 ER -

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