TY - CHAP
T1 - ESR dating of barite in sea-floor hydrothermal sulfide deposits in the okinawa trough
AU - Fujiwara, Taisei
AU - Toyoda, Shin
AU - Uchida, Ai
AU - Ishibashi, Jun Ichiro
AU - Nakai, Shun’Ichi
AU - Takamasa, Asako
N1 - Publisher Copyright:
© The Author(s) 2015.
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2015/1/1
Y1 - 2015/1/1
N2 - 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.
AB - 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.
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U2 - 10.1007/978-4-431-54865-2_29
DO - 10.1007/978-4-431-54865-2_29
M3 - Chapter
AN - SCOPUS:84930817408
SN - 9784431548645
SP - 369
EP - 386
BT - Subseafloor Biosphere Linked to Hydrothermal Systems
PB - Springer Japan
ER -