Noble gas isotope lab
The laboratory has facilities for noble-gas analysis, consisting of ultrahigh vacuum purification system and furnace.
The K-Ar age is determined by unspiked method
(Ryu et al., 2013)
for young rocks (e.g., Holocene volcanic rocks)
and spiked method (Nagao et al., 1996; Feyissa et al., 2017)
for relatively older rocks (0.1 to 100 Ma).
Methods and techniques:
Ryu et al. (2013).
K-Ar analyses of the post-caldera lavas of Bratan volcano in Bali Island,
Indonesia - Ar isotope mass fractionation to light isotope enrichment,
Journal of Volcanology and Geothermal Research, 264, 107-116.
Nagao et al. (1996).
Ar Isotope Analysis for K-Ar Dating Using Two Modified-VG5400 Mass Spectrometers—I: Isotope Dilution Method,
Journal of the Mass Spectrometry Society of Japan, 44(1), 39-61.
Feyissa et al. (2017).
Petrologic and geochemical characterization of rift-related magmatism at the northernmost Main Ethiopian Rift:
Implications for plume-lithosphere interaction and the evolution of rift mantle sources,
Lithos, 282-283, 240-261 (2017).
