From: Hydrous Na-garnet from Garnet Ridge; products of mantle metasomatism underneath the Colorado Plateau
Chemistry | Exsolution lamella phases | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Garnet group | Color | Prp (mol%) | Alm (mol%) | Grs (mol%) | Cr2O3 (wt.%) | Cpx | Amp | Ap | Rt | Ilm | Ctn | Sri | Crm | Cr-Spl |
A. Cr-rich pyrope | Red-purple | 67–74 | 13–18 | 7–11 | 1.0–6.4 | + | + | + | + | + | + | |||
B. Cr-poor pyrope | ||||||||||||||
B1. Amp type | Brown | 49–66 | 18–28 | 16–26 | <0.4 | ++ | + | ++ | ++ | + | + | |||
B2. Ilm-only type | R-brown | 49–68 | 20–38 | 12–19 | 0.4–2.0 | ++ | + | |||||||
B3. Dense lamellae type | Black | 54–72 | 18–33 | 12–15 | <1.0 | ++ | ++ | + | ++ | ++ | + | |||
B4. Cpx-Amp type | Light brown | 61–76 | 13–27 | 6–11 | <0.6 | ++ | + | ++ | ++ | |||||
Inclusions without lamella textures | ||||||||||||||
Garnet group | Ol | Opx | Cpx | Ti-Chu | Chl | Spl | Crn | Dol | Mgs | Ap | sulfides | Multi | ||
A. Cr-rich pyrope | ++ | ++ | ++ | + | + | + | + | +a | ||||||
B. Cr-poor pyrope | ||||||||||||||
B1. Amp type | ++ | + | + | + | + | + | ||||||||
B2. Ilm-only type | ++ | ++ | ++ | + | + | + | ++b | |||||||
B3. Dense lamellae type | ++ | + | + | + | + | ++c | ||||||||
B4. Cpx-Amp type | + | + | + |