In:
Geochronometria, Walter de Gruyter GmbH, Vol. 46, No. 1 ( 2019-05-17), p. 79-86
Abstract:
Three quartz samples extracted from different origins were collected for ESR evaluation to appreciate the optical bleaching characteristics of the E 1 ’ centre in a long time scale. After exposure of about 400 hours to artificial sunlight, the E 1 ’ centre were bleached to a steady increasing level, about 2.5 times of its natural level, and the increase level also exhibit a small variability among different sample origins. The constant increasing level provide a significantly evidence for the potential use of the natural signal intensities of quartz E 1 ’ centre in tracing sediment provenance. The results show that the signal intensity of E 1 ’ centre increased within beginning 84 h and decreased after 202 h as previous researches have partly predicted. After long time exposed to sunlight, there is no correlation between irradiated samples’ dose rate and its E 1 ’ centre ESR signal intensity. Thus, no new convenient indication shed light on the possible use of the E 1 ’ centre for ESR sediment dating.
Type of Medium:
Online Resource
ISSN:
1897-1695
DOI:
10.1515/geochr-2015-0106
Language:
English
Publisher:
Walter de Gruyter GmbH
Publication Date:
2019
detail.hit.zdb_id:
2232947-X
