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Sediment residence times in catchments draining to the Gulf of Carpentaria, northern Australia, inferred by uranium comminution dating

Martin, Ashley; Dosseto, Anthony; May, Jan-Hendrik; Jansen, John D.; Kinsley, Leslie; Chivas, A R


Uranium (U) isotopes are useful for constraining the timescales of weathering and erosion processes. The (234U/238U) activity ratio (parentheses denote activity ratio) of fine-grained detrital minerals is proposed to record the time elapsed since mineral grains were reduced to <63 μm in size, i.e. the comminution age. Comminution ages of river sediments theoretically represent the sum of hillslope storage and alluvial transport/storage in a catchment, i.e. the sediment residence time....[Show more]

CollectionsANU Research Publications
Date published: 2019
Type: Journal article
Source: Geochimica et Cosmochimica Acta
DOI: 10.1016/j.gca.2018.09.031


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