TY - GEN
T1 - COMPARISON OF CORRECTIONS FOR ANOMALOUS FADING IN POTASSIUM FELDSPAR: A LUMINESCENCE DATING CASE STUDY
AU - Pober, Rachel
AU - Huot, Sebastien
AU - Davis, Loren G.
AU - Keen-Zebert, Amanda
N1 - GSA Annual Meeting in Seattle, Washington, USA - 2017
PY - 2017
Y1 - 2017
N2 - The Cooper’s Ferry archaeological site is important to understanding early lithic technologies in the northwestern United States. The site, located on an alluvial terrace at the confluence of Rock Creek and the Salmon River in Idaho, contains a Western Stemmed Tradition cultural assemblage component with radiocarbon dates that align with the ages of Clovis technology. We used single grain post-infrared, infrared stimulated luminescence (PostIR-IRSL225) on potassium feldspar to refine the chronostratigraphy at the site. To evaluate the fading of the feldspar luminescence signal, we compared fading tests on single grains, multigrain 2 mm aliquots, and on single grain discs analyzed with a multigrain approach. The ages calculated using single grain fading corrections are in strong agreement with independent age control and have overall low error (~5%) and low overdispersion (typically < 12%). These results prompted a comparison and evaluation of different methods commonly used to measure luminescence signal fading.
AB - The Cooper’s Ferry archaeological site is important to understanding early lithic technologies in the northwestern United States. The site, located on an alluvial terrace at the confluence of Rock Creek and the Salmon River in Idaho, contains a Western Stemmed Tradition cultural assemblage component with radiocarbon dates that align with the ages of Clovis technology. We used single grain post-infrared, infrared stimulated luminescence (PostIR-IRSL225) on potassium feldspar to refine the chronostratigraphy at the site. To evaluate the fading of the feldspar luminescence signal, we compared fading tests on single grains, multigrain 2 mm aliquots, and on single grain discs analyzed with a multigrain approach. The ages calculated using single grain fading corrections are in strong agreement with independent age control and have overall low error (~5%) and low overdispersion (typically < 12%). These results prompted a comparison and evaluation of different methods commonly used to measure luminescence signal fading.
KW - ISGS
UR - https://gsa.confex.com/gsa/2017AM/webprogram/Paper307788.html
U2 - 10.1130/abs/2017AM-307788
DO - 10.1130/abs/2017AM-307788
M3 - Conference contribution
BT - Abstracts with Programs - Geological Society of America
ER -