Journal article
U-series Dating of a Speleothem from Inazumi Cave, Oita Prefecture, Japan
Abstract
Trace quantities of uranium and thorium were separated from a submerged calcite speleothem (stalactite) sample from Inazumi Cave, Oita Prefecture, using Fe (OH) 3 coprecipitation followed by anion-exchange separation with HNO3 and HCl. The isotope ratios 234U/238U and 230Th/234U were determined by isotope-dilution thermal ionisation mass spectrometry. The speleothem became submerged by accumulation of the Aso welded-tuff, Aso-4, and a resulting …
Authors
YOSHIMURA K; URATA K; SCHWARCZ H; Derek F
Journal
Journal of Ion Exchange, Vol. 14, No. Supplement,
Publisher
Japan Association of Ion Exchange
Publication Date
2003
DOI
10.5182/jaie.14.supplement_225
ISSN
0915-860X