Constraining neotectonic deformation of the Colombian sub-Andes
Issue Date
2015-05-31Author
Dalman, Erica Megan
Publisher
University of Kansas
Format
67 pages
Type
Thesis
Degree Level
M.S.
Discipline
Geology
Rights
Copyright held by the author.
Metadata
Show full item recordAbstract
The eastern foothills of the Eastern Cordillera of the Colombian Andes are actively shortening; however, deformation rates of Quaternary structures remain sparse. Here we present millennia-scale deformation rates of the Guaicaramo thrust in the Eastern Cordillera using Terrestrial in situ Cosmogenic Nuclide dating techniques. Furthermore, we analyze river profiles along strike using digital elevation models to quantify the fluvial response to uplift. This research provides insight into thrust wedge mechanics and dynamics, seismic hazard mitigation, and hydrocarbon production potential of the region. The Quaternary shortening rate of the Guaicaramo thrust is 1.72 ± 0.30 mm/yr, which represents ~3% of the total horizontal shortening across the Colombian Andes. Furthermore, the normalized channel steepness (ksn) values reflect that the Eastern Cordillera foothills are experiencing rapid uplift. Analysis of ksn is a novel approach in the region. This work provides quantitative metrics of the surface response to uplift along the eastern foothills of the Eastern Cordillera.
Collections
- Geology Dissertations and Theses [232]
- Theses [3906]
Items in KU ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
We want to hear from you! Please share your stories about how Open Access to this item benefits YOU.