Table 2. Stoichiometric mineral compositions for CA13-05A, based on assumed number of oxygen atoms shown.

Note that Fe in zoisite was assumed to be 100% Fe³⁺ and Fe in all other minerals was assumed to be 100% Fe²⁺. Hbl, hornblende; Gln, glaucophane; Chl, chlorite; Aln, allanite.

	CA13-05A
	Hbl 1	Hbl 2	Gln	Chl	Zo 1	Zo 2	Aln
Si	7.29	6.92	7.85	2.97	2.91	2.85	2.94
Ti	0.02	0.03	0.01	0.01	0.01	0.06	0.01
Al	1.24	1.91	1.77	2.32	2.41	2.09	2.01
Cr	—	—	—	—	—	—	—
Fe	1.56	1.57	1.30	1.84	0.51	0.73	0.87
Mn	0.02	0.01	0.01	0.02	0.01	0.02	0.02
Mg	3.00	2.67	2.21	2.68	—	—	—
Ca	1.50	1.47	0.12	—	1.77	1.70	1.40
Na	0.82	0.93	1.98	—	—	—	—
K	0.04	0.08	—	0.01	—	—	—
O	23	23	23	14	12.5	12.5	12.5
Al/(Al + Si)	0.15	0.22	0.18	0.44	0.45	0.42	0.41
Fe/(Fe + Al)	0.56	0.45	0.42	0.44	0.17	0.26	0.30
Fe/(Fe + Mg)	0.34	0.37	0.37	0.41	—	—	—
Na/(Na + Ca)	0.35	0.39	0.94	—	—	—	—
Na/(Na + K)	0.95	0.92	—	—	—	—	—
Total oxides (wt %)	97.1	98.9	97.1	86.1	96.7	97.2	81.0