From: Hydrous Na-garnet from Garnet Ridge; products of mantle metasomatism underneath the Colorado Plateau
Chemistry | Micro-FTIR analysis | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Classification | Sample no. | Pyp(mol%) | Cao(wt%) | Cr2O3 (wt%) | Band positions (cm−1) | Int. Abs. a(cm−1) | OH contents (ppmw) | ||||
A | Cr-rich pyrope | S1_Pr1 | 69 | 5.5 | 2.2 | 3573 | 41.3 | 24 | |||
A | Cr-rich pyrope | S1_Pr2 | 70 | 5.5 | 2.3 | 3678 | 3573 | 83.7 | 48 | ||
A | Cr-rich pyrope | S1_Pr3 | 70 | 4.9 | 2.8 | 3678 | 3572 | 164.9 | 95 | ||
A | Cr-rich pyrope | S2_Pr1 | 69 | 5.3 | 5.1 | 3673 | 3571 | 136.8 | 78 | ||
A | Cr-rich pyrope | S2_Pr2 | 69 | 5.2 | 2.3 | 3680 | 3571 | 60.3 | 35 | ||
A | Cr-rich pyrope | S2_R3 | 67 | 5.1 | 2.3 | 3675 | 3571 | 201.0 | 115 | ||
B1 | Amp type | S1_Br1 | 59 | 7.6 | 0.0 | 3575 | 41.5 | 24 | |||
B1 | Amp type | S2_Br2 | 49 | 7.6 | 0.0 | 3674 | 3578 | 73.3 | 42 | ||
B1 | Amp type | S4_Br1 | 65 | 7.3 | 0.1 | 3574 | 10.7 | 6 | |||
B1 | Amp type | S6_Br1 | 62 | 7.0 | 0.1 | 3569 | 4.8 | 3 | |||
B2 | Ilm-only type | S2_Br2 | 57 | 5.6 | 1.8 | 3666 | 3573 | 176.7 | 101 | ||
B2 | Ilm-only type | S5_Br2 | 60 | 6.3 | 1.8 | 3653 | 3549 | 46.9 | 27 | ||
B3 | Dense lamellae type | 0909B_Bl3_1 | 73 | 4.6 | 0.3 | 3580 | 6.7 | 4 | |||
B3 | Dense lamellae type | 0909B_Bl3_2 | 69 | 5.3 | 0.4 | 3718(Amp) | 3570 | 17.2 | 10 | ||
B3 | Dense lamellae type | 0909B_Bl3_3 | 69 | 5.1 | 0.3 | 3572 | 7.5 | 4 | |||
B3 | Dense lamellae type | 0909B_Bl3_4 | 60 | 5.1 | 1.0 | 3712(Amp) | 3684(Amp) | 3579 | 12.4 | 7 | |
B4 | Cpx-Amp type | S3_Br1 | 66 | 4.8 | 0.5 | 3569 | 4.0 | 2 |