Open AccessApplication of long time artificial optical bleaching of the E1’ centre to sediment ESR dating
Author(s) -
Chuanyi Wei,
Chunru Liu,
LI Chang-an,
Geng Yin,
Yufen Zhang,
Wenpeng Li,
Lupeng Yu
Publication year - 2019
Publication title -
geochronometria
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.626
H-Index - 31
eISSN - 1897-1695
pISSN - 1733-8387
DOI - 10.1515/geochr-2015-0106
Subject(s) - sunlight , quartz , sediment , provenance , signal strength , mineralogy , intensity (physics) , irradiation , signal (programming language) , geology , environmental science , geochemistry , paleontology , optics , physics , nuclear physics , telecommunications , computer science , wireless , programming language
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.