| Abstract: | New scanning electron microscope techniques have been developed for characterizing ductile deformation microstructures in felsic rocks. In addition, the thermomechanical history of the macroscopically undeformed Barre granite (Vermont, U.S.A.) has been reconstructed based on examination of deformation microstructures using optical microscopy, scanning electron microscopy, and transmission electron microscopy. The microstructures reveal three distinct events: 1. (1) a low-stress, high-temperature event that produced subgrains in feldspars, and subgrains and recrystallized grains in quartz; 2. (2) a high-stress, low-temperature event that produced a high dislocation density in quartz and feldspars; and 3. (3) a lowest-temperature event that produced cracks, oriented primarily along cleavage planes in feldspars, and parallel to the macroscopic rift in quartz. The first two events are believed to reflect various stages in the intrusion and cooling history of the pluton, and the last may be related to the last stages of cooling, or to later tectonism. ?? 1986. |
| Genre: | Article |
| ProdID: | 70014949 |
| Citation Author: | Schedl, A.; Kronenberg, A. K.; Tullis, J. |
| Citation Contributing Office: | |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | |
| Citation End Page: | 164 |
| Citation Issue: | 1-2 |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | Tectonophysics |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | 16 |
| 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: | Deformation microstructures of Barre granite: An optical, Sem and Tem study; 1986; Article; Journal; Tectonophysics; Schedl, A.; Kronenberg, A. K.; Tullis, J. |
| Citation Start Page: | 149 |
| Citation Volume: | 122 |
| Citation Year: | 1986 |
| Type: | citation/reference |
| Text: | Deformation microstructures of Barre granite: An optical, Sem and Tem study; 1986; Article; Journal; Tectonophysics; Schedl, A.; Kronenberg, A. K.; Tullis, J. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 1986 00:00 -0600 |
| Publisher: | |
