| Abstract: | Fault-propagation folding associated with an upward propagating fault in the Gilbertown graben system is revealed by well-based 3-D subsurface mapping and dipmeter analysis. The fold is developed in the Selma chalk, which is an oil reservoir along the southern margin of the graben. Area-depth-strain analysis suggests that the Cretaceous strata were growth units, the Jurassic strata were pregrowth units, and the graben system is detached in the Louann Salt. The growth trishear model has been applied in this paper to study the evolution and kinematics of extensional fault-propagation folding. Models indicate that the propagation to slip (p/s) ratio of the underlying fault plays an important role in governing the geometry of the resulting extensional fault-propagation fold. With a greater p/s ratio, the fold is more localized in the vicinity of the propagating fault. The extensional fault-propagation fold in the Gilbertown graben is modeled by both a compactional and a non-compactional growth trishear model. Both models predict a similar geometry of the extensional fault-propagation fold. The trishear model with compaction best predicts the fold geometry. ?? 2008 Elsevier Ltd. All rights reserved. |
| Genre: | Article |
| ProdID: | 70037011 |
| Citation Author: | Jin, G.; Groshong, Jr. , R. H.; Pashin, J. C. |
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| Citation End Page: | 940 |
| Citation Issue: | 9 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Structural Geology |
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| Citation Number Of Pages: | 15 |
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| Citation Search Results Text: | Growth trishear model and its application to the Gilbertown graben system, southwest Alabama; 2009; Article; Journal; Journal of Structural Geology; Jin, G.; Groshong, Jr. , R. H.; Pashin, J. C. |
| Citation Start Page: | 926 |
| Citation Volume: | 31 |
| Citation Year: | 2009 |
| Type: | citation/reference |
| Text: | Growth trishear model and its application to the Gilbertown graben system, southwest Alabama; 2009; Article; Journal; Journal of Structural Geology; Jin, G.; Groshong, Jr. , R. H.; Pashin, J. C. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1016/j.jsg.2008.09.006 |
| Date Other: | Thu, 1 Jan 2009 00:00 -0600 |
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