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Slip-rate measurements on the Karakorum Fault may imply secular variations in fault motion | | M-L Chevalier
; F J Ryerson
; P Tapponnier
; R C Finkel
; J Van Der Woerd
; Li Haibing
; Liu Qing
; | | Date: |
21 Jan 2005 | | Journal: | Science, 307 (5708), 411-4 | | 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 approximately 10.7 +/- 0.7 millimeters per year. This rate is 10 times larger than that inferred from recent InSAR analyses ( approximately 1 +/- 3 millimeters per year) that span approximately 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. | | Source: | PubMed, pmid15662010 doi: 10.1126/science.1105466 | | Services: | Forum | Review | Favorites | |
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