Inescapable slow slip on the Altyn Tagh fault

Details Inescapable slow slip on the Altyn Tagh fault Inescapable slow slip on the Altyn Tagh fault

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3109613w&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 9, CiteID L09613

Physics

16

Tectonophysics: Continental Tectonics-General (0905), Tectonophysics: Plate Boundary-General (3040), Information Related To Geographic Region: Asia

Scientific paper

GPS surveys conducted in 1994, 1998, and 2002 on the central portion of the Altyn Tagh fault confirm left-lateral slip rates of 9 +/- 4 mm/yr, significantly slower than geological estimates of slip rate for the past several thousand years. The measurements were obtained on a 300-km-long profile between 88° and 91°E within one fault dimension of the Mw = 7.6 and Mw = 7.8 Kunlun earthquakes of 1997 and 2001. The inferred elastic displacements from these events are incorporated into the interpreted 1994-2002 velocity field. The recent serendipitous occurrence of these two large earthquakes on a sub-parallel fault system suggests that slip on the Kunlun fault may have recently accelerated, thereby reducing the slip rate on the Altyn Tagh fault. However, geodetic data from northern Tibet prior to the 2001 earthquake indicate present-day rates similar to long term rates. This suggests that systematic errors may be present in published geologic slip rate estimates for the Altyn Tagh fault.

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