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Noah, We have an abstract coming out for the Geological Society of America annual meeting program for the fall of this year entitled FINE-SCALE SPATIAL PARTITIONING OF MICROSEISMOGENIC STRAIN ALONG THE SOUTHEASTERN MARGIN OF THE SIERRAN MICROPLATE, INDIAN WELLS VALLEY, CALIFORNIA LEWIS, Jonathan C., TWISS, Robert J., UNRUH, Jeffrey R. We find the seismogenic strain is best explained by a 'strike-slip' component and a 'normal' component of strain, and the seismic events associated with those two components are intimately mixed in space and time. The spatial scale of mixing is on the order of the spacing between microseisms and is probably 100's of meters or less. You could email Jon Lewis ([log in to unmask]) who would probably send you a copy of the abstract. Rob Twiss ++++++++++++++++++++++++++++++++++++++++++++++ >Dear all, > >I am currently in the final stages of a PhD on strike slip >processes and crustal extrusion in central Turkey. The trans- >tensional fault zone which I am particularly interested in (The >Ecemis Fault Zone) shows a peculiar feature along part of its >length. In this area (about 10km long) Pliocene–Quaternary >strain appears to be partitioned into pure normal-slip along an >eastern lineament, and dominantly strike-slip along a western >lineament 5km away. Along the majority of the fault zone (which > is >100km long) both normal and strike-slip motion are taken >up by the same faults (data includes river offsets, structural and >straitigraphic piercing points and slikenline populations). > >Does anyone know whether such outcrop-scale strain- >partitioning has previously been documented in trans-tensional >fault zones? I’ve found a few references for partitioning in >transpressive regimes but only on a much larger scale. > >Any comments would be most appreciated. > >Thanks, Noah Jaffey > Edinburgh University. Robert J. Twiss Internet: [log in to unmask] Geology Department telephone: (530) 752-1860 University of California at Davis FAX: (530) 752-0951 One Shields Ave. Davis, CA 95616-8605, USA %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%