Evaluation of detrital thermochronology for quantification of glacial catchment denudation and sediment mixing

摘要: Abstract Thermochronometric methods have been applied successfully on bedrock samples as well detrital material to study exhumation processes in mountain belts. The access exposed can be a limiting factor remote and rugged mountainous regions, or areas covered by ice. analysis of provides an integrated signal rock cooling from sediment source catchment. One advantage thermochronology is that the include regions are inaccessible for dating, such beneath glaciers. In this we investigate suitability various thermochronometer sampling approaches at glacier terminus including sediments pro-glacial fluvial outwash, ice-cored terminal moraine, older moraines. Specifically analyzed apatite fission track ages sand-size collected Tiedemann Scimitar Glaciers drain eastern northern flanks Mt. Waddington British Columbia, Canada, respectively. We present 935 new fission-track compare grain-age distributions sites among each other with published Glacier show thermochronometry viable powerful tool obtain robust age distribution catchment region elucidate populations originating those parts ice therefore remain undetected studies. also moraine alternative approach river representative sourced entire sub-glacially eroded material. Finally, modern glacial systems moraines different compared assess temporal variations erosion over Late Holocene.