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Imaoka Teruyoshi

Affiliate Master Yamaguchi University

K-Ar ages of hornblendes in andesite and dacite from the Cretaceous Kanmon Group, Southwest Japan

Journal of Mineralogy, Petrology and Economic Geology Volume 88 Issue 5 Page 265-271
published_at 1993
2007010087.pdf
[fulltext] 2.94 MB
Title
K-Ar ages of hornblendes in andesite and dacite from the Cretaceous Kanmon Group, Southwest Japan
Creators Imaoka Teruyoshi
Creators Nakajima Tsukasa
Creators Itaya Tetsumaru
Creator Keywords
Kanmon Group K-Ar age Hornblende Albian Andesite Dacite
New K-Ar ages of hornblende in volcanic rocks from the type localities of the Shimonoseki Subgroup, upper half of the Kanmon Group are presented. The obtained ages are 105.2±3.3 Ma for andesite and 106.7±3.3 Ma for dacite. These data indicate igneous activity during Albian, late Early Cretaceous and support the age estimation by Shibata et al. (1978) based on stratigraphic and paleomagnetic evidences.
Subjects
地球惑星科学 ( Other)
Languages eng
Resource Type journal article
Publishers 日本岩石鉱物鉱床学会
Date Issued 1993
File Version Version of Record
Access Rights open access
Relations
[ISSN]0914-9783
Schools 大学院理工学研究科(理学)