Variable Denudation in the Evolution of the Bolivian Andes: Controls and Uplift-Climate-Erosion Feedbacks

摘要: Controls on denudation in the eastern Bolivian Andes are evaluated by synthesis of new and existing estimates from basin -morphometry, stream powered fluvial incision, landslide mapping, sediment flux, erosion surfaces, thermochronology, foreland volumes, structural restorations. Centered at 17.5 °S, northeastern exhibit high relief, a wet climate, narrow foldthrust belt. In contrast, southeastern have low semi -arid wide fold -thrust Basin -morphometry indicates northward increase relief relative denudation. Stream -power along river profiles shows greater average incision rates north factor 2 to 4. south, profile knickpoints with controlled belt structures such as surface expressions basement megathrusts, faults, folds, lithologic boundaries. Landslide -flux data elevation, morphology, size show similar trend; short -term -rate averages (19 mm/yr) than south (0.3 -0.4 mm/yr). Long including fission track, fill, restorations also values (0.2 -0.8 compared (0.04 -0.3 long include orographic global atmospheric circulation patterns precipitation, climate change, glaciation, geometry