Table 1.

Magnesium isotope compositions of chondrites, terrestrial (ultra-)mafics, and achondrites.

Sample	Type	δ25Mg (‰)	2se	n1
Orgueil	CI1	-0.105	0.010	8
Ivuna	CI1	-0.095	0.008	12
Al Rais	CR2	-0.094	0.008	12
Renazzo	CR2	-0.135	0.008	12
Kainsaz	CO3	-0.158	0.010	8
Murchison	CM2	-0.145	0.010	8
Parnallee	LL3	-0.152	0.009	11
Dhurmsala	LL6	-0.148	0.010	8
Ceniceros	H3	-0.157	0.009	11
Zag	H3	-0.132	0.007	19,2
Khairpur	EL6	-0.137	0.006	23,2
Hvittis	EL6	-0.135	0.008	12
Yilmia	EL6	-0.130	0.007	16
St Mark's	EH5	-0.129	0.006	23,2
Abee	EH4	-0.142	0.008	12
Indarch	EH4	-0.128	0.008	12
Mean Chondrites2		-0.140	0.006
JP-1	Dunite	-0.117	0.004	43,5
BZ116	Sp Hz	-0.133	0.009	11
Vi 313-102	Gt Lz	-0.130	0.010	8
BZ143	Sp Lz	-0.120	0.009	11
BZ-29	Sp Lz	-0.115	0.010	8
Vi 314-56	Sp Lz	-0.115	0.010	8
BZ251	Plg Lz	-0.129	0.010	8
2370-1	MORB	-0.111	0.010	8
DS12-29	MORB	-0.110	0.010	8
9/30a(1)	MORB	-0.124	0.010	8
BIR-1	OIB	-0.099	0.010	8
BHVO-2	OIB	-0.095	0.004	60,3
Mean Earth3		-0.121	0.005
ALHA 77005	Lz Sherg	-0.112	0.009	11
DaG 476	Bas Sherg	-0.123	0.009	11
EETA 79001	Bas Sherg	-0.113	0.009	11
RBT 04262	Ol Sherg	-0.117	0.010	8
Zagami	Bas Sherg	-0.113	0.010	8
LAR 06319	Ol Sherg	-0.102	0.009	11
Mean Mars		-0.113	0.006
Johnstown	Diogenite	-0.102	0.010	8
Shalka	Diogenite	-0.104	0.010	8
Tatahouine	Diogenite	-0.127	0.010	8
Mean Diogenites		-0.111	0.016
d'Orbigny	Angrite	-0.079	0.010	8

¹Total number of analyses. If a comma is present, the number behind the comma refers to the number of digestions. Each digestion was passed through chemistry once.

²The two CI1 chondrites (Ivuna, Orgueil) and one CR2 (Al Rais) were excluded from the mean.

³The two Ocean Island Basalts (BHVO-2 and BIR-1) were excluded from the mean.

Sp Hz = Spinel Harzburgite, Gt Lz = Garnet Lherzolite, Plg = Plagioclase, MORB = Mid-Ocean Ridge Basalt, OIB = Ocean Island basalt, Bas Sherg = Basaltic Shergottite, Ol = Olivine-phyric.