| Abstract: | Seismicity on crustal faults is concentrated in the depth interval 1-3 to 12-15 km. Tse and Rice (1986) suggested that the lower bound on seismicity is due to a switch with increasing temperature from velocity weakening (destabilizing) to velocity strengthening (stabilizing) friction. New data is presented from sliding experiments on granite at elevated T (23?? to 600??C) plus elevated PH2O(100 MPa). Results show velocity strengthening at room temperature, but velocity weakening from 100?? to 350??C (except at 250??). From 350?? to 600?? there are systematic trends from velocity weakening to strong velocity strengthening, and from high to low friction; neither trend was seen in tests on dry granite. The velocity dependence data imply the potential for unstable slip in the interval 100?? to 350??. Using a geotherm to map temperature to depth, this interval closely matches the observed earthquake distribution. -from Authors |
| Genre: | Article |
| ProdID: | 70016597 |
| Citation Author: | Blanpied, M. L.; Lockner, D. A.; Byerlee, J. D. |
| Citation Contributing Office: | |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | |
| Citation End Page: | 612 |
| Citation Issue: | 4 |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | Geophysical Research Letters |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | 4 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | |
| Citation Series: | |
| Citation Series Code: | |
| Citation Series Number: | |
| Citation Search Results Text: | Fault stability inferred from granite sliding experiments at hydrothermal conditions; 1991; Article; Journal; Geophysical Research Letters; Blanpied, M. L.; Lockner, D. A.; Byerlee, J. D. |
| Citation Start Page: | 609 |
| Citation Volume: | 18 |
| Citation Year: | 1991 |
| Type: | citation/reference |
| Text: | Fault stability inferred from granite sliding experiments at hydrothermal conditions; 1991; Article; Journal; Geophysical Research Letters; Blanpied, M. L.; Lockner, D. A.; Byerlee, J. D. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Tue, 1 Jan 1991 00:00 -0600 |
| Publisher: | |
