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ESR dose response of the Al center measured in quartz samples from the Yellow River (China): Implications for the dating of Upper Pleistocene sediment

Voinchet P., Yin G., Falguères Ch., Liu Ch., Han F., Sun X., Bahain J. J.

Geochronometria

2013

Vol. 40, no. 4

341--347

The ESR dating method requires to describe the evolution of the ESR signal intensities vs. increasing gamma doses, then to extrapolate the equivalent dose of radiation received by the sample since its deposition using mathematical fitting. The function classically used to describe the growth curves of ESR aluminium signal in quartz was recently discussed and challenged for Lower Pleisto-cene sediments. In the present work, some alluvial sediments sampled in Upper Pleistocene fluvial terraces of the Yellow River system (China) permit us to test the application of another extrapolation function (linear + exponential) recently proposed for Lower Pleistocene sediments. The equivalent doses obtained here for the recent deposits of the Yellow River system and the corresponding ages are promising and indicate the potential of ESR to date quartz deposits from Upper Pleistocene times.