CGRG Bibliography of Canadian Geomorphology
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Author : Berger, G.W.
Date : 1985
Title : Thermoluminescence dating applied to a thin winter varve of the late glacial South Thompson silt, southcentral BC
Publication : Canadian Journal of Earth Sciences
Issue : 22(11):
Page(s) : 1736-1739
Abstract
The partial bleach procedure of thermoluminescence (TL) dating of unheated sediments has been applied to the 2-4 micrometre sized feldspar-dominated grains from two components of a 10-11 ka BP glaciolacustrine silt. A previous TL study of the 4-11 micrometre sized feldspars from a ~12 cm thick summer layer of this varved deposit did not produce the correct age. Here it is shown that the 2-4 micrometre feldspar grains from a contiguous, 5 mm thick clay-rich winter varve give a satisfactory TL apparent age of 14.2 + or - 2.3 ka. On the other hand, and consistent with the previous results, the 2-4 micrometre feldspar grains from the thicker summer layer yield an incorrect high apparent age of 55 + or - 13 ka. These results have implications for general TL dating of waterlaid sediments.
Bibliography of Canadian Geomorphology