Table 1.
Volatile and mineral contents of secondary inclusions determined from in situ Raman analyses. Normalized modes of primary minerals determined from visual estimates in thin section. Ant, antigorite; Brc, brucite; Cal, calcite; Cpx, clinopyroxene; Ctl, chrysotile; Dol, dolomite; Lz, lizardite; Mag, magnetite; Mg-Cal, high-Mg calcite; Mgs, magnesite; Oliv, olivine; Pg, paragonite; Plag, plagioclase; Sht, shortite; Tr-Act, tremolite-actinolite.
| composition of secondary inclusions in mineral hosts | normalized primary mode (vol.%) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| location | lithology | sample | olivine | plagioclase | clinopyroxene | hornblende | Plag | Oliv | Cpx | Opx | LOI (wt.%) |
| Cayman | gneissic metagabbro | ALV 620-3C | CH4, H2, Brc, Lz, Tlc | CH4, H2O, Pg | CH4, Mg-Cal, Tr-Act | CH4, Lz, Ant, Cal | — | — | — | — | 1.497 |
| olivine gabbro | ALV 620-5-1 | CH4, H2, Brc, Ctl, Lz, Ant, Mag, Dol | CH4, H2, H2O, Pg, Cal, Sht? | CH4, Tr-Act | — | 75 | 5 | 20 | 0 | 1.695 | |
| ALV 624-5-1 | CH4, H2, Brc, Ctl, Lz, Mag, Mg-Cal | CH4, H2O, Cal | CH4 | — | 50 | 35 | 15 | 0 | 1.394 | ||
| troctolite | ALV 621-3-1 | CH4, H2, Brc, Ctl, Lz, Mag, Cal | CH4, H2, H2O, Cal | — | — | 80 | 20 | 0 | 0 | 3.464 | |
| ALV 623-3-2 | CH4, H2, Brc, Ctl, Lz, Ant, Mag, Cal, Dol, Mgs | CH4, H2, H2O, Pg, Cal | CH4, Tr-Act | — | 90 | 9 | 1 | 0 | 0.985 | ||
| peridotite | ALV 624-3-3 | CH4, H2, Brc, Ctl, Lz, Ant, Mag | — | — | — | 0 | 85 | 1 | 14 | 10.40 | |
| ALV 624-6-2 | CH4, H2, Brc, Ctl | — | — | — | 0 | 90 | 1 | 9 | 11.82 | ||
| Zambales | dunite | ZMCR-02 | CH4, H2, Brc, Ctl, Lz, Ant | — | — | — | 0 | 99 | 1 | 0 | 13.49 |
| ZMCR-03 | H2, Brc, Ctl, Lz | — | — | — | 0 | 99 | 1 | 0 | 13.72 | ||
| peridotite | NSS-02 | CH4, H2, Brc, Lz, Ctl | — | — | — | 0 | 88 | 2 | 10 | 3.657 | |
| NSS-04 | CH4, H2, Brc, Lz, Ctl, Ant, Dol | — | — | — | 0 | 90 | 1 | 9 | 3.358 | ||