Physics
Scientific paper
Apr 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3508405y&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 8, CiteID L08405
Physics
Hydrology: Groundwater Hydrology, Geochemistry: Radiogenic Isotope Geochemistry, Geochemistry: Stable Isotope Geochemistry (0454, 4870), Geochemistry: Instruments And Techniques, Paleoceanography: Speleothems
Scientific paper
A method of deriving the travel time of drip water based on the tritium/helium 3 (3H/3He) dating method was demonstrated in limestone caves in Indonesia. The examined drip waters from two caves, which were taken using different methods, included 2.15 (+/- 0.84) TU and 1.35 (+/- 0.77) TU of tritiogenic 3He. From the derived tritiogenic 3He contents and the measured tritium concentrations of the drip water samples (2.02 +/- 0.27 TU and 1.19 +/- 0.40 TU), the 3H/3He ages (travel times) of the drip waters from the two caves were estimated as 12.9 +/- 3.8 years and 13.5 +/- 6.3 years. The latter age is probably overestimated because re-equilibration of He between drip water and cave air is expected to occur during sampling. For reliable derivation of 3H/3He age, it is advisable to take a drip water sample that is kept isolated from the cave air.
Brahmantyo Budi
Kitaoka Koichi
Maryunani Khoiril Anwar
Matsuoka Hiroshige
Ohsawa Shinji
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