Pleistocene Sediments from the Trent Valley : Optically Stimulated Luminescence (OSL) Dating
Author(s): Bridgland, Andy J Howard, Jean-Luc Schwenninger, Tom White
A total of 33 samples were collected from 16 different sites within the Trent Valley for dating by optically stimulated luminescence (OSL). Luminescence age estimates were obtained from sand-sized quartz grains and palaeodose determinations were made using a single aliquot regenerative-dose (SAR) measurement protocol. The environmental dose rate for each sample was calculated using the results of elemental analysis by ICP-MS and in situ gamma-ray spectroscopy measurements. The concentrations of radioactive elements within the sediments were well above detection limits but the quartz used for dating was often characterized by low sensitivity to laboratory induced irradiation. This problem combined with the common occurrence of contaminant feldspar minerals provided challenging conditions for luminescence dating. Despite these limitations, meaningful age estimates could be obtained for the majority of samples and the results provide a much improved and robust chronological framework for terrace development and landscape evolution of the Middle and Lower Trent Valley.
- Report Number:
- 57/2007
- Series:
- Research Department Reports
- Pages:
- 29
- Keywords:
- Geochronology Optically Stimulated Luminescence Pleistocene
