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