101 research outputs found
Conversion of K-Ar dates with modern constants : implications for recalculation of dates reported in Kawano and Ueda using constants reported by Steiger and Jager
No full text論文(Article)This report describes details of a procedure used to convert from K-Ar dates with old constants reported in the relevant literature to K-Ar dates with modern decay constants and the isotopic ratio of potassium reported by Steiger and Jager. Nearly 300 K-Ar dates published by Kawano and Ueda in the 1960s have been recalculated using this procedure. These data are useful for comparing dates reported by Kawano and Ueda to recently obtained K-Ar dates reported by others
On the relationships between the 40Ar-39Ar dating results and the conditions of basaltic samples.
No full textUnpublished K-Ar dates measured in the geochronology laboratory of Yamagata University : Rocks from Myojinyama in the Mukaimachi caldera, northeastern Yamagata Prefecture
No full text論文(Article
Antarctic micrometeorite collection at a bare ice region near Syowa Station by JARE-41 in 2000
No full textAntarctic micrometeorite collection at a bare ice region near Syowa Station by JARE-41 in 2000
No full textP(論文)We collected Antarctic Micrometeorites (AMMs) at a bare ice field near Syowa Station in the austral fall and spring seasons of 2000. The facility for the AMMs collection introduced by the 39th Japanese Antarctic Research Expedition (JARE-39) was improved to increase the filtering rate of the melt water. The filtering rate became 4-5 times quicker than the previous system, ∿1000 liter/hour, by the addition of a new water pump in parallel with the previous pump. About 50 tons of melt water were formed, of which about 40 tons were filtered using this new system, and 18 holes were made in the bare ice region in 23 days. We obtained particles in which abundant micrometeorites should be included.departmental bulletin pape
Petrologic Study of Explosive Pyroclastic Eruption Stage in Shirataka Volcano, NE Japan: Synchronized Eruption of Multiple Magma Chambers
No full textNon
K-Ar dates measured in the geochronology laboratory of Yamagata University : Rocks from the Nekoma volcano, Fukushima Prefecture
No full text論文(Article
Unpublished K-Ar dates measured in the geochronology laboratory of Yamagata University : Rocks from the Nanatsumori volcano, Miyagi Prefecture
No full text論文(Article
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