Research ArticleGEOCHEMISTRY

Gallium isotopic evidence for extensive volatile loss from the Moon during its formation

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Science Advances  28 Jul 2017:
Vol. 3, no. 7, e1700571
DOI: 10.1126/sciadv.1700571

Figures

Tables

  • Table 1 Gallium isotopic composition and element concentration of the lunar samples.

    n = number of isotopic measurements.

    Sample typeSample no.δ71Ga (‰)2 SDnGa (ppm)Ga (ppm)*
    Mg-suite
      Cataclastic norite772150.160.0511.5
    Regolith
      Soil782211.160.0512.1
    Pyroclastic glass
      Green glass15426−0.350.0511.34.7
    FANs
      Anorthosite (with melt)62255−0.470.0510.5
      Cataclastic anorthosite600150.170.0511.4
      Ferroan anorthosite154150.850.0511.13.1
      Noritic anorthosite679550.200.0511.93.5–4.2
    Low-Ti basalts
      Basalt (low Ti)154990.090.0523.23
      Olivine basalt120120.320.0221.1
      Olivine basalt120400.150.0531.41.9
      Mare basalt (Al-rich)14053−0.170.0510.82.5–4.8
    High-Ti basalts
      Basalt (high Ti)700170.150.0132.53.1–21
      Basalt (high Ti)100030.350.0621.74.0–4.7
      Basalt (high Ti)701350.570.0222.57–16
      Ilmenite basalt (high K)10057−0.030.0364.8
      Ilmenite basalt (high Mg/Fe)120050.220.0131.1
    BSE0.000.053.9§

    *Data from Meyer (47).

    †Used the 2 SD estimated from Kato et al. (26).

    ‡Data from Kato et al. (26).

    §Data from McDonough (48).

    • Table 2 Ga/Al ratio of the FANs.
      Sample typeSample
      no.
      Ga
      (ppm)
      Al
      (ppm)*
      Ga/Al*104
      (ppm/
      ppm)
      FANs
        Anorthosite
      (with melt)
      622550.51607860.03
        Cataclastic
      anorthosite
      600151.41857760.08
        Ferroan
      anorthosite
      154151.11884400.06
        Noritic
      anorthosite
      679551.91436740.13

      *Data from Meyer (47).

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