Combining surface exposure dating and burial dating from paired cosmogenic depth profiles. Example of El Límite alluvial fan in Huércal-Overa basin (SE Iberia)
2013; Elsevier BV; Volume: 19; Linguagem: Inglês
10.1016/j.quageo.2013.10.002
ISSN1878-0350
AutoresÁngel Rodés, Raimón Pallàs, María Ortuño, Eduardo García‐Meléndez, E. Masana,
Tópico(s)Geological formations and processes
ResumoCosmogenic nuclide depth-profiles are used to calculate the age of landforms, the rates at which erosion has affected them since their formation and, in case of deposits, the paleo-erosion rate in the source area. However, two difficulties are typically encountered: 1) old deposits or strongly affected by cosmogenic nuclide inheritance often appear to be saturated, and 2) a full propagation of uncertainties often yields poorly constrained ages. Here we show how to combine surface-exposure-dating and burial-dating techniques in the same profile to get more accurate age results and to constrain the extent of pre-depositional burial periods. A 10Be–26Al depth-profile measured in an alluvial fan of SE Iberia is presented as a natural example.
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