ESR dating of barite in sea-floor hydrothermal sulfide deposits in the okinawa trough

Taisei Fujiwara, Shin Toyoda, Ai Uchida, Jun Ichiro Ishibashi, Shun’Ichi Nakai, Asako Takamasa

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Abstract

ESR (electron spin resonance) ages were determined for barite crystals extracted from hydrothermal sulfide deposits taken at Daiyon-Yonaguni Knoll field, Hatoma Knoll field, Iheya North Knoll field, Hakurei Site of Izena Hole field, Yoron Hole field of the Okinawa Trough. The ages range from 4.1 to 16,000 years, being consistent with detection of 228Ra in younger samples and radioactive equilibrium/disequilibrium between radium and daughter nuclei. The variation of the ages within each sample is mostly within the statistical error range. The relative order of the ages is consistent with the result of 226Ra-210Pb method, but the determining absolute ages is still an issue. The order of ages of the 5 hydrothermal fields would be arranged, from young to old as follows; Yoron Hole field, Daiyon-Yonaguni Knoll field, Hatoma Knoll field, being nearly equal to Iheya North Knoll field.

Original languageEnglish
Title of host publicationSubseafloor Biosphere Linked to Hydrothermal Systems
Subtitle of host publicationTAIGA Concept
PublisherSpringer Japan
Pages369-386
Number of pages18
ISBN (Electronic)9784431548652
ISBN (Print)9784431548645
DOIs
Publication statusPublished - Jan 1 2015

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All Science Journal Classification (ASJC) codes

  • Earth and Planetary Sciences(all)

Cite this

Fujiwara, T., Toyoda, S., Uchida, A., Ishibashi, J. I., Nakai, SI., & Takamasa, A. (2015). ESR dating of barite in sea-floor hydrothermal sulfide deposits in the okinawa trough. In Subseafloor Biosphere Linked to Hydrothermal Systems: TAIGA Concept (pp. 369-386). Springer Japan. https://doi.org/10.1007/978-4-431-54865-2_29