Abstract
Ten samples of slope-wash and colluvial deposits from a trench wall at Xiyangfang, Yanqing County, located in the northern margin fault zone of the Yanqing Basin, about 90 km northwest of Beijing, have been dated by both green light stimulated emission (GLSL) and infra-red stimulated emission (IRSL). Four of the samples were measured in both Adelaide (Risø equipment) and Beijing (Daybreak equipment), with essentially consistent results. The paper gives a comparison of equivalent dose values obtained by both GLSL and IRSL. The Xiyangfang trench wall presents four fault-scarp-collapsed wedges, showing a clear normal faulting pattern, which can be interpreted as a record of palaeo-earthquake events, covering a time period from about 100 ka to the modern. A return time of about 7000 yr is suggested for events at this site. An attempt is made to correlate the dating records with the local earthquake history of destructive earthquakes in the last 2000 yr.
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