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- W2012303460 abstract "[1] Low-temperature thermochronometers are widely used to quantify exhumation histories, typically by interpreting sample cooling age-elevation relationships. However, the effects of specific geomorphic processes on age-elevation profiles are seldom considered. We integrate apatite (U-Th)/He [AHe], apatite fission track, and zircon (U-Th)/He thermochronometry with numerical modeling to determine the effect of glacial erosion on an age-elevation profile from the heavily glaciated southern Coast Mountains, British Columbia. AHe data show a distinct break in slope in age-elevation between 1900–2100 m. We interpret this break in slope as an acceleration of erosion associated with the onset of alpine glaciation. We use a 3-D thermo-kinematic model to constrain pre- and synglacial erosion rates. Results indicate a preglacial erosion rate of ∼0.4 mm/yr that accelerated by a factor of ∼2 since ∼6 Ma. We propose that glacial valley widening and deepening are responsible for the observed nonlinear AHe age-elevation profile." @default.
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- W2012303460 date "2007-01-17" @default.
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- W2012303460 title "Effect of Alpine glaciation on thermochronometer age-elevation profiles" @default.
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- W2012303460 doi "https://doi.org/10.1029/2006gl028371" @default.
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