Eizo Nakamura et al. (1986) K-Ar ages of basalts from the Higashi-Matsuura district, northwestern Kyushu, Japan and regional geochronology of the Cenozoic alkaline volcanic rocks in eastern Asia, Geochemical Journal, 20, 91-99, doi:10.2343/geochemj.20.91. < 20150918180709-838886 > pub
Table 1. K-Ar ages for whole rock samples of basalt from the Higashi-Matsuura district and the Ogawashima island, NW Kyushu, Japan < 20190513115711-582875 > pub
measured unit 80811-3 80821-3 80901-2 80908-5 80807-9
age Ma 2.99 (0.03) 3.01 (0.04) 2.92 (0.03) 2.98 (0.04) 3.58 (0.05)
[K] a % 1.155 0.523 1.476 1.861 1.127
40Arrad b ng/g 6.01 2.74 7.49 9.62 7.0
(a) determined by Flame emission spectrometry on Shimadzu AA6200
(b) determined by isotope dilution mass spectrometry with 38Ar spike on Micromass VG5400
name physical-form quantity unit global-id
80811-3 pub hand specimen 0.32 kg 20121101085414-158-819
80821-3 pub hand specimen 0.14 kg 20121114085125-558-275
80901-2 pub hand specimen 0.34 kg 20121101085405-319-559
80908-5 pub hand specimen 0.17 kg 20121114085119-111-481
80807-9 pub hand specimen 0.325 kg 20121101085448-606-122

The table is created from analysis shown below. The assembly K-Ar dating (Nakamura et al., 1986) filters out analysis. Upper analysis has priority.To list more analysis, add a stone in stone sub-tab.

  • name
    technique
    device
    priority
80811-3 80821-3 80901-2 80908-5 80807-9