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Dynamic links among rock damage, erosion, and strain during orogenesis.
- Source :
-
Geology . Jul2016, Vol. 44 Issue 7, p583-586. 4p. 1 Diagram, 2 Graphs, 1 Map. - Publication Year :
- 2016
-
Abstract
- We provide model evidence for a previously unexplored positive feedback between tectonic strain and fluvial erosion by considering rock erodibility as a function of shear damage. Plastic shear strain permanently damages the upper crust within planar shear zones, providing a greater ease for detachment and transport by fluvial processes. The subsequent rapid erosion of exposed shear zones reforms the topographic stress field in a way that encourages continued accommodation of strain, a positive feedback response that becomes more prominent with greater shear damage. Based on model results and natural examples, rock strength heterogeneity plays a major role in the evolution of drainage network patterns and the capability for valley-scale strain localization in active orogens. [ABSTRACT FROM AUTHOR]
- Subjects :
- *EROSION
*OROGENY
*STRUCTURAL geology
*SHEAR zones
*OROGENIC belts
Subjects
Details
- Language :
- English
- ISSN :
- 00917613
- Volume :
- 44
- Issue :
- 7
- Database :
- Academic Search Index
- Journal :
- Geology
- Publication Type :
- Academic Journal
- Accession number :
- 116544580
- Full Text :
- https://doi.org/10.1130/G37753.1