| Abstract: | Deformation along the Denali fault in the Delta River canyon was determined from geodetic surveys in 1941/1942, 1970, 1975, and 1979. The data were best for the 1975-79 interval; in that period the average strain accumulation was essentially pure right lateral shear at a rate of 0.6+-0.1 murad/a (a is years) (engineering shear) across a vertical plane striking N87oE. The plane of maximum shear is rotated about 30o countercloskwise from the local strike of the Denali fault but closely coincides with the strike of a major linear segment of the fault that begins 50 km farther W. The deformation between 1941-42 and 1970 is consistent with a similar rate of strain accumulation if one removes the coseismic strain step contributed by the 1964 Alaska earthquake. The 1970-75 deformation is poorly defined owing to uncertainties in the 1970 survey, but the strain accumulation during that period is certainly much less than during the 1975-79 interval. The 1975-79 strain accumulation is interpreted by means of a dislocation model which suggests that the Denali fault in the vicinity of the Delta River Canyon behaves as a leaky transform fault.-Authors |
| Genre: | Article |
| ProdID: | 70012098 |
| Citation Author: | Savage, J. C.; Lisowski, M.; Prescott, W. H. |
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| Citation End Page: | 1014 |
| Citation Issue: | B2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Geophysical Research |
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| Citation Number Of Pages: | 10 |
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| Citation Search Results Text: | Strain accumulation across the Denali fault in the Delta River canyon, Alaska.; 1981; Article; Journal; Journal of Geophysical Research; Savage, J. C.; Lisowski, M.; Prescott, W. H. |
| Citation Start Page: | 1005 |
| Citation Volume: | 86 |
| Citation Year: | 1981 |
| Type: | citation/reference |
| Text: | Strain accumulation across the Denali fault in the Delta River canyon, Alaska.; 1981; Article; Journal; Journal of Geophysical Research; Savage, J. C.; Lisowski, M.; Prescott, W. H. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Thu, 1 Jan 1981 00:00 -0600 |
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