| Abstract: | The eastern margin of the Yucca Flat basin, in southern Nevada, is bounded by NNW-striking tilted fault blocks of the Halfpint Range whose strikes curve as much as 90?? clockwise into ENE strikes in the French Peak-Massachusetts Mountain (FPMM) area. This pattern of arcuate structures has been attributed to clockwise drag along a postulated NW-trending, right-lateral shear zone. The flexure model implies that rocks within the FPMM area were rotated strongly clockwise about a vertical axis. Directions of remanent magnetization of the middle Miocene Ammonia Tanks and Rainier Mesa Members of the Timber Mountain Tuff and of the Topopah Spring Member of the Paintbrush Tuff indicate no systematic vertical-axis rotation in the FPMM area and disprove the flexure model. The paleomagnetic data indicate that structures in the FPMM area initiated with arcuate trends and were not originally straight elements that were rotated by right-lateral drag. The structures probably formed under the influence of spatially variable stress fields. The FPMM area lies in an accommodation zone between domains of oppositely tilted extensional fault blocks. Interaction between stress fields associated with propagating normal-fault zones may have been responsible for the arcuate structures in the FPMM area. -from Author |
| Genre: | Article |
| ProdID: | 70016567 |
| Citation Author: | Hudson, M. R. |
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| Citation End Page: | 594 |
| Citation Issue: | 5 |
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| Citation Language: | English |
| Citation Larger Work Title: | Geological Society of America Bulletin |
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| Citation Number Of Pages: | 14 |
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| Citation Search Results Text: | Paleomagnetic data bearing on the origin of arcuate structures in the French Peak-Massachusetts Mountain area of southern Nevada; 1992; Article; Journal; Geological Society of America Bulletin; Hudson, M. R. |
| Citation Start Page: | 581 |
| Citation Volume: | 104 |
| Citation Year: | 1992 |
| Type: | citation/reference |
| Text: | Paleomagnetic data bearing on the origin of arcuate structures in the French Peak-Massachusetts Mountain area of southern Nevada; 1992; Article; Journal; Geological Society of America Bulletin; Hudson, M. R. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 1992 00:00 -0600 |
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