OSL single-grain dating of sediments from Tam Pa Ling: dose rate data, equivalent doses and ages.

a Determined from beta counter measurements of dried and powdered sediment samples.b Determined from U, Th and K concentrations measured using a portable gamma-ray spectrometer at field water contentc Time-averaged cosmic-ray dose rates (for dry samples), each assigned an uncertainty of ± 10%.d Field / time-averaged water contents, expressed as (mass of water/mass of dry sample) x 100. The latter values were used to calculate the total dose rates and OSL agese Mean ± total (1σ) uncertainty, calculated as the quadratic sum of the random and systematic uncertainties. An internal dose rate of 0.03 Gy ka-1 is also includedf Statistical model used to determine the dose distribution between grains-MAM—Minimum Age Modelg Palaeodoses include a ± 2% systematic uncertainty associated with laboratory beta-source calibrationsh OSL signal measured using single-grains of quartz—between 800–1800 grains were run for each sample with between 6–20% of the grains emitting an acceptable luminescence signal, with the De derived from a MAM.i Uncertainties at 68% confidence intervalOSL single-grain dating of sediments from Tam Pa Ling: dose rate data, equivalent doses and ages.