| Autor: |
Federico M. Dávila, Gregory D. Hoke, Teresa E. Jordan, Andrew J. Tomlinson, Nicolás Blanco, Peter L. Nester |
| Rok vydání: |
2010 |
| Předmět: |
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| Zdroj: |
Tectonics. 29 |
| ISSN: |
0278-7407 |
| DOI: |
10.1029/2010tc002661 |
| Popis: |
[1] The western flank of the Central Andean Plateau is a crustal-scale monoclinal fold, expressed in the geomorphology and in the westward tilt of fore-arc basin strata. Data from three fore-arc basins quantify the magnitude and time of displacement of the plateau system relative to the fore arc. From 18°30′S to 22°S there is a single monocline strand. There, other authors documented ∼2000 m (±500 m) of early and middle Miocene structural relief growth across small-scale monoclines, and our data reveal 810 m (±640 m) of ∼11–5 Ma relief growth and 400 m (±170 m) relief growth since ∼5 Ma across a long-wavelength monoclinal fold limb. This structural relief growth since ∼11 Ma approximates the topographic relief growth between the fore arc and the Altiplano plateau. From 22°S to 24°S there are two subparallel long-wavelength monoclines. Structural relief on the east side of the fore arc increased by 2840 m (±2510 m) during ∼17–10 Ma and by 2320 m (±1050 m) since ∼10 Ma. Some part of this monoclinal limb rotation led to topographic uplift of the adjacent Puna plateau. Rotation across the western monocline could have increased the altitude of the fore-arc basins by |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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