K-Ar dating by smectite extracted from bentonite formations

We attempt to apply K-Ar dating to extracted smectite from bentonite formations collected by different age formations from Japan, China, and America. The results show that the K-Ar ages of smectite are younger than the expected geological age estimated from the stratigraphic data or other research d...

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Bibliographic Details
Published inE3S Web of Conferences Vol. 98; p. 12015
Main Authors Nakata, Eiji, Yukawa, Mei, Okumura, Hiroshi, Hamada, Masaaki
Format Journal Article Conference Proceeding
LanguageEnglish
Published Les Ulis EDP Sciences 01.01.2019
Subjects
Age
Bentonite
Crystallization
Formations
Geological time
Potassium-argon dating
Radiometric dating
Strata
Stratigraphy
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Summary:We attempt to apply K-Ar dating to extracted smectite from bentonite formations collected by different age formations from Japan, China, and America. The results show that the K-Ar ages of smectite are younger than the expected geological age estimated from the stratigraphic data or other research data. The time differences increase with increased age, and K-Ar ages in this study also increase with increased age. For example, smectite in the old strata of bentonite has an older age than smectite in the young strata. K-Ar dating by smectite has the greatest potential for indicating the crystallized age of smectite.
ISSN:2267-1242
2555-0403
2267-1242
DOI:10.1051/e3sconf/20199812015