Table 1.

Mg isotope data and ²⁷Al/²⁴Mg ratios for NWA1670, D’Orbigny and Sah99555.

Meteorite/mineralogy	µ26Mg* ± 2 se (ppm)	µ25Mg ± 2 se (ppm)	n	24Mg (V)	27Al/24Mg	Mg# (ol)
NWA1670
ol	−10.6 ± 0.8	+100 ± 9	10	117	0.003	0.84
ol	−12.7 ± 1.7	+33 ± 4	10	74	0.004	0.85
ol	−11.2 ± 2.2	+13 ± 13	10	80	0.008	0.90
ol	−8.1 ± 2.3	0 ±4	10	86	0.009	0.73
ol	−11.4± 0.9	+ 63 ± 4	10	71	0.010	0.84
ol	−10.5 ± 2.6	−4 ± 6	10	75	0.015	0.90
ol	−9.1 ± 1.4	+14±3	10	82	0.016	0.83
ol	−12.7 ± 1.2	+2 ± 9	10	85	0.018	0.88
ol	−11.8 ± 1.2	+35 ± 6	10	111	0.022	0.89
ol	−9.0 ± 2.0	+19 ± 11	10	100	0.034	0.79
fsp/px	−5.3 ± 1.5	+36 ± 22	10	116	1.93
fsp/px	−0.8 ± 1.6	+177 ± 9	10	113	2.18
fsp/px	−1.3 ± 1.6	+57 ± 11	10	123	2.48
fsp/px	−0.4 ± 1.5	+15 ± 18	10	117	2.60
fsp/px	+1.8 ± 1.6	+77 ± 3	10	96	2.73
fsp/px	+0.9 ± 0.9	+81 ± 3	10	94	2.83
fsp/px	+3.0 ± 2.3	+56 ± 7	10	92	3.02
fsp/px	+0.5 ± 3.3	+65 ± 7	10	64	3.11
fsp/px	+4.3 ± 2.4	+56 ± 5	10	69	3.20
D’Orbigny
ol	+3.9 ± 3.8	−161 ± 23	4	27	0.220
ol	+4.0 ± 1.1	−4 ± 14	10	102	0.240
ol	+4.4 ± 1.3	+60 ± 4	10	139	0.721
px	+5.7 ± 1.4	+ 71 ± 17	10	116	1.36
WR	+9.2 ± 1.6	+26 ± 20	10	117	1.78
fsp	+29.2 ± 3.6	+62 ± 17	8	61	8.27
fsp	+93.3 ± 4.1	−15 ± 21	10	28	29.5
fsp	+121.5 ± 3.3	−191 ± 8	10	32	43.3
Sah99555
ol	+1.2 ± 3.6	−205 ± 13	10	30	0.085
WR	+11.5 ± 2.3	−14 ± 9	10	38	2.14
fsp	+121.4 ± 5.8	−11 ± 23	10	26	45.0
fsp	+168.8 ± 11	−151 ± 84	3	26	64.1

Notes: ol = olivine, fsp = feldpspar, px = pyroxene, WR = whole rock.