『Abstract
The geometry of foreland basins is controlled by a dynamic balance
between thrust-belt migration, flextural subsidence, and fluvial
deposition. To improve our ability to quantify the relationships
between tectonics, climate, and foreland basin geometry, I developed
analytic solutions for basin topography and stratigraphy using
a classic two-dimensional mathematical model of foreland basin
evolution. Model predictions for basin topography are successfully
tested against observed profiles along a humid-to-arid climatic
gradient in the central Andes. Using published estimates for the
thrust-belt migration rate, flexural parameter, and thrust-front
basin depth in this region, I show that basin topographic profiles
can be used to estimate the upstream erosion rate at any point
along a foreland basin. Basin-averaged erosion rates estimated
in this way vary from 0.025 to 0.045 mm/yr in the central Andes,
increasing from semiarid to humid climates.
Keywords: foreland basin; flexure; diffusion; modeling』
Introduction
Model description
Application
Conclusions
Acknowledgments
References cited