LUMINESCENCE DATING OF FLUVIAL SEDIMENTS FROM CHUPADEROS CANYON NEW MEXICO: COINCIDENCE BETWEEN TRADITIONAL METHODS AND ADVANCED TECHNIQUES, OR NOT?
In this project we use and compare traditional methods (IRSL MAAD) and advanced techniques, including single-grain laser luminescence (SGLL) measurements, dose distribution analysis, and error deconvolution, to date fluvial sediments from Chupaderos Canyon terraces. The terraces have been faulted and offset by seismic activity on the Guaje Mountain fault. Luminescence dating can provide a depositional chronology for the fluvial sediments that can in turn be used to constrain the timing of seismic activity.
Our results indicate that consistent ages can be obtained from both advanced objective techniques and traditional methods, however, a subjective analytical paradigm must be tolerated when considering the IRSL MAAD data. We will also discuss past inconsistencies in traditional luminescence dates from the area, such as age inversions and age over-estimates, in the context of information that can be gathered from dose distributions analysis.