{"title":"Optimizing the isothermal plateau fission-track dating method for volcanic glass shards","authors":"A.S. Sandhu, J.A. Westgate, B.V. Alloway","doi":"10.1016/1359-0189(93)90187-E","DOIUrl":null,"url":null,"abstract":"<div><p>The dating of volcanic hydrated glass shards presents considerable difficulties. However, within recent years the fission-track method based on the isothermal plateau technique has been successfully applied to such glasses. Age estimates obtained by this means compare very well with those based on co-existing mineral phases using the K-Ar, <sup>40</sup>Ar/<sup>39</sup>Ar and thermoluminescence techniques. Annealing studies of nuclear tracks in the temperature range of 100–300°C have been made for various volcanic glass samples. The activation energy, <em>E</em><sub>a</sub>, for track annealing is determined in the frame of a model involving a unique value of <em>E</em><sub>a</sub> for a given glass sample. These annealing studies suggest that the thermal stability of nuclear tracks in volcanic glasses is mainly controlled by the SiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> ratio.</p></div>","PeriodicalId":82207,"journal":{"name":"Nuclear Tracks And Radiation Measurements","volume":"21 4","pages":"Pages 479-488"},"PeriodicalIF":0.0000,"publicationDate":"1993-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/1359-0189(93)90187-E","citationCount":"34","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nuclear Tracks And Radiation Measurements","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/135901899390187E","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 34
Abstract
The dating of volcanic hydrated glass shards presents considerable difficulties. However, within recent years the fission-track method based on the isothermal plateau technique has been successfully applied to such glasses. Age estimates obtained by this means compare very well with those based on co-existing mineral phases using the K-Ar, 40Ar/39Ar and thermoluminescence techniques. Annealing studies of nuclear tracks in the temperature range of 100–300°C have been made for various volcanic glass samples. The activation energy, Ea, for track annealing is determined in the frame of a model involving a unique value of Ea for a given glass sample. These annealing studies suggest that the thermal stability of nuclear tracks in volcanic glasses is mainly controlled by the SiO2/Al2O3 ratio.
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