A New Source of Basaltic Meteorites Inferred from Northwest Africa 011 Akira Yamaguchi, Robert N. Clayton, Toshiko K. Mayeda, Mitsuru Ebihara, Yasuji Oura, Yayoi N. Miura, Hiroshi Haramura, Keiji Misawa, Hideyasu Kojima, and Keisuke Nagao

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Supplemental Table 1. Bulk chemical composition (wt%) of NWA011 determined by standard wet chemical analysis.
SiO2	45.63
TiO2	0.92
Al2O3	13.12
Fe2O3	0.15
FeO	21.13
MnO	0.40
MgO	6.66
CaO	11.11
Na2O	0.45
K2O	0.03
H2O(-)	0.05
H2O(+)	0.3
P2O5	<0.02
Cr2O3	0.24
FeS	0.05
Fe	0.0
Ni	0.028
Co	<0.003
Total	100.26

Supplemental Table 2. Abundances of 36 elements in NWA011, Juvinas, and Millbillillie.
NWA011				Juvinas		Millbillillie
Na	(%)	0.428	±0.054	0.282	±0.013	0.335	±0.010
Mg	(%)	3.18	±0.07	4.49	±0.10	4.43	±0.10
Al	(%)	6.09	±0.06	6.01	±0.07	6.69	±0.08
Si	(%)	21.9	±0.5	22.6	±0.6	23.5	±0.6
K	(%)	0.033	±0.004	0.031	±0.003	0.036	±0.003
Ca	(%)	7.37	±079	7.09	±0.26	7.22	±0.31
Sc	(ppm)	14.3	±3.3	33.5	±0.2	31.0	±1.4
Ti	(%)	0.46	±0.02	0.47	±0.01	0.43	±0.03
V	(ppm)	57	±4	67	±5	62	±5
Cr	(%)	0.130	±0.014	0.231	±0.012	0.230	±0.011
Mn	(%)	0.239	±0.024	0.462	±0.005	0.465	±0.018
Fe	(%)	17.6	±0.1	15.6	±0.1	15.5	±0.1
Co	(ppm)	41.9	±0.3	5.06	±0.08	6.10	±0.07
Ni	(ppm)	145	±4	14	±1	9	±1
Zn	(ppm)	18	±1	<4		<5
Ga	(ppm)	3.9	±0.7	2.1	±0.3	2.0	±0.6
Se	(ppm)	1.9	±0.5	<1		<1
La	(ppm)	0.382	±0.013	2.44	±0.09	2.31	±0.08
Ce	(ppm)	1.74	±0.06	6.86	±0.24	6.41	±0.22
Pr	(ppm)	0.244	±0.008	1.06	±0.04	0.983	±0.033
Nd	(ppm)	1.09	±0.04	5.27	±0.18	4.85	±0.16
Sm	(ppm)	0.462	±0.015	1.79	±0.06	1.62	±0.06
Eu	(ppm)	0.593	±0.020	0.565	±0.020	0.581	±0.020
Gd	(ppm)	0.638	±0.022	2.42	±0.09	2.17	±0.07
Tb	(ppm)	0.136	±0.005	0.441	±0.016	0.394	±0.013
Dy	(ppm)	1.04	±0.04	3.06	±0.11	2.70	±0.09
Ho	(ppm)	0.235	±0.008	0.68	±0.024	0.602	±0.020
Er	(ppm)	0.727	±0.025	1.96	±0.07	1.74	±0.06
Tm	(ppm)	0.120	±0.004	0.287	±0.010	0.255	±0.009
Yb	(ppm)	0.837	±0.029	1.94	±0.07	1.74	±0.06
Lu	(ppm)	0.123	±0.005	0.296	±0.011	0.266	±0.009
Hf	(ppm)	1.33	±0.10	1.22	±0.09	1.13	±0.11
Ta	(ppm)	0.38	±0.04	0.22	±0.03	0.17	±0.02
Ir	(ppb)	26	±1	<2		<2
Th	(ppb)	18.9	±2.5	284	±15	279	±16
U	(ppb)	25.8	±4.2	92.4	±8.1	89.1	±7.8
*Rare Earth elements, Th, and U were determined by ICP-MS and the rest were by INAA (including PGA).

Supplemental Table 3. Cosmogenic and radiogenic noble gases of NWA011 (144 mg). Uncertainties of absolute concentrations are about 5% for He and Ne, and 10% for the others. The cosmic-ray exposure ages are calculated based on cosmogenic 3He, 21Ne, and 38Ar and their production rates given by (1, 2). Combining cosmogenic 81Kr (half life = 2.1 × 105 years) with other stable Kr isotopes, the 81Kr-Kr age is calculated from the equation: T81 = (-1/)(P81/P83)(83Kr/81Kr)c, where is the decay constant of 81Kr, (P81/P83) is the production rate ratios of cosmogenic 81Kr/83Kr, and (83Kr/81Kr)c is the cosmogenic 83Kr/81Kr ratio of the meteorite. The 81Kr-Kr dating method gives the most reliable exposure age for the meteorite with a short terrestrial age (3, 4), or an upper limit for the meteorite with a long terrestrial age (2) due to radioactive decay of 81Kr after falling on the earth (e.g., 15% decay of 81Kr corresponds to the terrestrial age of 50,000 years, which may be detectable).
Cosmogenic (10-9cm3STP/g)					Cosmic-ray exposure age (Ma)
3He	21Ne	38Ar	83Kr	22Ne/21Ne	81Kr/83Kr	T3	T21	T38	T81
176	49.8	32.5	0.031	1.204	0.00479	11	30	23	39
				±0.009	±0.00060				±5

Radiogenic (10-9cm3STP/g)		Gas retention age (Ga)
4He	40Ar	T40
<100	4530	2.0
		±0.3

REFERENCES

1. O. Eugster, Th. Michel, Geochim. Cosmochim. Acta 59, 177 (1995).
2. M. Freundel, L. Schultz and C. Reedy, Geochim. Cosmochim. Acta 50, 2663 (1986).
3. O. Eugster, P. Eberhardt and J. Geiss, Earth Planet. Sci. Lett. 2, 77 (1967).
4. K. Marti, Physical Rev. Lett. 18, 264 (1967).