Allende Meteorite Reference Sample

Abstract

the elements determined, in spite of substantial variations between bulk Allende and that meteorite's spheroidal Ca-Al-rich inclusions (Chou et al., 1976). ACKNOWLEDGMENTS.-We are indebted to R. Bild, R. Glimp, J. Kimberlin, K. Robinson, and L. Sundberg for assistance. Neutron irradiations at the UCLA and Ames Laboratories reactors were handled by J. Brower and A.F. Voight and their associates. This work was supported by NSF Grant GA 32084. 1450±40 c , 1400 e , 1300 f , l700 g 3370±100 c , 3300±100 d , 3300', 3000 f 200 e , 250 f , 1800±1200 g 130±22 c , 70 e , l70 f 3680±100 c , 3900±100 d , 3600 e , 4200 f , 4200 g 640±20 c , 650±40 d , 600 e , 700 f , 600 g 11.0±0.5 c , 12.2±0.2 d , ll e , 10 g 0.027±0.001 c 0.19±0.01 c 3.0±0.1 c , 2 e 0.44±0.02 c , 0.7 e 1.25±0.06 c , l e 0.20±0.01 c , 0.2 e 0.91±0.05 c , 0.9 e 0.29±0.01 c , 0.5 e 0.107±0.005 c ,0.1 e 0.43±0.02 c , 0.6 e 0.074±0.005 c , 0.09 e 0.42±0.02 c , 0.6 e 0.12±0.1 c ,0.1 e 0.31±0.02 c , 0.3 e 0.049±0.001 c 0.32±0.02 c , 0.4 e 0.058±0.002 c * The In value determined for 10-2 is 0.02±0.01; the large error limit is imposed due to an analyzer malfunction during counting. b The Cd value for 12-2 could not be determined because of a laboratory accident during the chemical processing.

Chemical composition of the Kobe meteorite; Neutron-induced prompt gamma ray analysis study.

“…It is noticed that all the elements except B and Na (and Ca) were determined within 10% RSD. Except for H, B and Cl, whose recommendation values are not given in Jarosewich et al (1987), our PGA values are consistent with the recommended values by Jarosewich et al (1987) with a relative ratio of 1.008 ± 0.083 (1σ). The value of RSD for each element is roughly correlated with the intensity of its prompt gamma ray; for Fe, these values are 1.2% and 0.171 cps, respectively, whereas 9.5% and 0.0232 cps for Ti.…”

“…Absolute values of elemental contents were obtained for powder samples (C-3mix-3 and Maralinga) and chondrules (C-3-2ch) by using JB-1 (a geological standard rock issued by the Geological Survey of Japan) and the Allende carbonaceous chondrite (a meteorite reference sample prepared by the Smithsonian Institution) (Jarosewich et al, 1987) as reference standards. Chemical reagents, NH 4 Cl and Na 2 SO 4 also were used as reference standards for the determination of H and Cl, and S, respectively.…”

“…Chemical reagents, NH 4 Cl and Na 2 SO 4 also were used as reference standards for the determination of H and Cl, and S, respectively. In addition to these absolute contents, contents relative to Si also were determined by applying the internal monostandard method (Sueki et al, 1996;Latif, 2000) for four lump samples (C-main, C-1, C-2 and C- Jarosewich et al (1987).…”

Comparative Study of Activation Analyses for the Determination of Trace Halogens in Geological and Cosmochemical Samples

“…Their results are shown in Table 7, where Allende represents the Allende meteorite powder sample prepared and issued by the Smithsonian Institution 13 and JB-1 and JG-1 are geological standard rocks supplied by the Geological Survey of Japan. The Allende meteorite belongs to CV3 (Vigarano-type carbonaceous chondrite of petrological type 3).…”

A U.S. Geological Survey Round Robin for Microanalytical Techniques

“…The focus is typically on a single technique or single application such as glass reference materials for electron probe microanalysis (EPMA) [1,2,3,4,5] and glass and pressed powder pellet reference materials or candidate materials for laser ablation inductively coupled plasma mass spectroscopy (LA-ICP-MS) [5]. Most investigators, however, employ multiple microanalytical techniques such as EPMA, LA-ICP-MS, and secondary ion mass spectrometry (SIMS) to answer questions from major to trace element chemistry and isotopic composition.…”