Abstract
The causes of red colour thermoluminescence (RTL) from natural quartz have been sought in the presence of impurity elements. Some impurities in 31 varieties of natural quartz extracts, determined by a neutron activation analysis, have been examined with respect to a meaningful correlation of the RTL to the total detectable TL strength. Generally, the higher impurity contents were found in quartz of volcanic origin, which always emits purely RTL colour, whereas the lower impurities were usually detected in hydrothermal quartz, which emits purely blue TL (BTL) in all absorbed doses. Among the impurities, the middle REE (rare earth elements), involving Eu and Sm, particularly offered considerable correlation with RTL emission with the exception of pegmatite quartz. It was found from the chondrite-normalized REE patterns that a positive Eu anomaly or flattened Eu distribution gave rise to relatively high RTL proportions, while a negative Eu anomaly always showed extremely weak RTL intensity. Thus, it was concluded that the Eu[sup 3+], formed from the oxidizable surrounding or high oxygen fugacity relative to a Cl chondrite formation, is strongly related to the RTL intensity in natural quartz. (author).
Hashimoto, T;
Yokosaka, K;
Notoya, S;
Ojima, T;
Sakaue, S
[1]
- Niigata Univ. (Japan). Faculty of Science
Citation Formats
Hashimoto, T, Yokosaka, K, Notoya, S, Ojima, T, and Sakaue, S.
Dependence of red thermoluminescence on Eu-anomaly in natural quartzes.
United Kingdom: N. p.,
1993.
Web.
Hashimoto, T, Yokosaka, K, Notoya, S, Ojima, T, & Sakaue, S.
Dependence of red thermoluminescence on Eu-anomaly in natural quartzes.
United Kingdom.
Hashimoto, T, Yokosaka, K, Notoya, S, Ojima, T, and Sakaue, S.
1993.
"Dependence of red thermoluminescence on Eu-anomaly in natural quartzes."
United Kingdom.
@misc{etde_5496922,
title = {Dependence of red thermoluminescence on Eu-anomaly in natural quartzes}
author = {Hashimoto, T, Yokosaka, K, Notoya, S, Ojima, T, and Sakaue, S}
abstractNote = {The causes of red colour thermoluminescence (RTL) from natural quartz have been sought in the presence of impurity elements. Some impurities in 31 varieties of natural quartz extracts, determined by a neutron activation analysis, have been examined with respect to a meaningful correlation of the RTL to the total detectable TL strength. Generally, the higher impurity contents were found in quartz of volcanic origin, which always emits purely RTL colour, whereas the lower impurities were usually detected in hydrothermal quartz, which emits purely blue TL (BTL) in all absorbed doses. Among the impurities, the middle REE (rare earth elements), involving Eu and Sm, particularly offered considerable correlation with RTL emission with the exception of pegmatite quartz. It was found from the chondrite-normalized REE patterns that a positive Eu anomaly or flattened Eu distribution gave rise to relatively high RTL proportions, while a negative Eu anomaly always showed extremely weak RTL intensity. Thus, it was concluded that the Eu[sup 3+], formed from the oxidizable surrounding or high oxygen fugacity relative to a Cl chondrite formation, is strongly related to the RTL intensity in natural quartz. (author).}
journal = []
volume = {21:2}
journal type = {AC}
place = {United Kingdom}
year = {1993}
month = {Apr}
}
title = {Dependence of red thermoluminescence on Eu-anomaly in natural quartzes}
author = {Hashimoto, T, Yokosaka, K, Notoya, S, Ojima, T, and Sakaue, S}
abstractNote = {The causes of red colour thermoluminescence (RTL) from natural quartz have been sought in the presence of impurity elements. Some impurities in 31 varieties of natural quartz extracts, determined by a neutron activation analysis, have been examined with respect to a meaningful correlation of the RTL to the total detectable TL strength. Generally, the higher impurity contents were found in quartz of volcanic origin, which always emits purely RTL colour, whereas the lower impurities were usually detected in hydrothermal quartz, which emits purely blue TL (BTL) in all absorbed doses. Among the impurities, the middle REE (rare earth elements), involving Eu and Sm, particularly offered considerable correlation with RTL emission with the exception of pegmatite quartz. It was found from the chondrite-normalized REE patterns that a positive Eu anomaly or flattened Eu distribution gave rise to relatively high RTL proportions, while a negative Eu anomaly always showed extremely weak RTL intensity. Thus, it was concluded that the Eu[sup 3+], formed from the oxidizable surrounding or high oxygen fugacity relative to a Cl chondrite formation, is strongly related to the RTL intensity in natural quartz. (author).}
journal = []
volume = {21:2}
journal type = {AC}
place = {United Kingdom}
year = {1993}
month = {Apr}
}