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

<p>^a Determined from beta counter measurements of dried and powdered sediment samples.</p><p>^b Determined from U, Th and K concentrations measured using a portable gamma-ray spectrometer at field water content</p><p>^c Time-averaged cosmic-ray dose rates (for dry samples), each assigned an uncertainty of ± 10%.</p><p>^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 ages</p><p>^e 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 included</p><p>^f Statistical model used to determine the dose distribution between grains-MAM—Minimum Age Model</p><p>^g Palaeodoses include a ± 2% systematic uncertainty associated with laboratory beta-source calibrations</p><p>^h 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.</p><p>ⁱ Uncertainties at 68% confidence interval</p><p>OSL single-grain dating of sediments from Tam Pa Ling: dose rate data, equivalent doses and ages.