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Abstract
This is a progress report on GEOBAS, a compilation and statistical analysis system for International Geochemical reference Samples. GEOBAS is written in dBASE IV and is applied to statistical analysis of Rare Earth Elements. As an example, GEOBAS is applied to five samples from the U.S. Geological Survey: basalts BCR-1, BHV0-1 and BIR-1, quartz latitc QL0-1 and Cody shale SCo-1. The means generated by GEOBAS agree within 10% with the published values. When the compiled data for a sample are less than 10, however, the differences between the published means and the means generated with GEOBAS may reach as high as 19%. In this case, the median is a more reliable estimator than the mean.
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References
ABBEY, S., 1977. "Standards Samples": How "standard" are they? Geostand. Newslett., 1, 39-45. DOI: https://doi.org/10.1111/j.1751-908X.1977.tb00856.x
ABBEY, S., 1992. Evaluation and application of reference materials for the analysis of rocks and minerals. Chem. Geol., 95, 123-130. DOI: https://doi.org/10.1016/0009-2541(92)90049-B
ANDO, A., H. KURASAWA, T. OHMORI y E. TAKEDA, 1974. Compilation of data on the GSJ geochemical reference samples JG-1 Granodiorite and JB-1 Basalt. Geochem. J., 8, 175-192. DOI: https://doi.org/10.2343/geochemj.8.175
ANDO, A., H. KAMIOKA, S. TERASHIMA y S. ITOH, 1989. 1988 values for GSJ rock reference samples, "Igneous rock series". Geochem. J., 23, 143-148. DOI: https://doi.org/10.2343/geochemj.23.143
CHRISTIE, O.H.J. y K.H. ALFSEN, 1977. Data transformation as a mean to obtain reliable consensus values for reference materials. Geostand. Newslett., 1, 123-130. DOI: https://doi.org/10.1111/j.1751-908X.1977.tb00857.x
DYBCZYNSKI, R., 1980. Comparison of the effectiveness of various procedures for the rejection of outlying results and assigning consensus values in interlaboratory programs involving determination of trace elements or radionuclides. Anal. Chim. Acta, 117, 53-70. DOI: https://doi.org/10.1016/0003-2670(80)87005-X
FAURE, G., 1986. Principles of Isotope Geology. 2nd. Edition, John Wiley, New York, 589 p.
GLADNEY, E. S. y I. ROELANDTS, 1988a. 1987 compilation of elemental concentration data for USGS BIR-1, DNC-1 and W-2. Geostand. Newslett., 12, 63-118. DOI: https://doi.org/10.1111/j.1751-908X.1988.tb00044.x
GLADNEY, E. S. y I. ROELANDTS, 1988b. 1987 compilation of elemental concentration data for USGS BHV0-1, MAG-1, QLO-1, RGM-1, SCo-1, SDC-1, SGR-1 and STM-1. Geostand. Newslett., 12, 253-362. DOI: https://doi.org/10.1111/j.1751-908X.1988.tb00053.x
GLADNEY, E. S., E. A. JONES, E. J. NICKELL y. I. ROELANDTS, 1990. 1988 compilation data for USGS Basalt BCR-1. Geostand. Newslett., 14, 209-359. DOI: https://doi.org/10.1111/j.1751-908X.1990.tb00075.x
GOVINDARAJU, K. y I. ROELANDTS, 1988. Compilation report (1966-1987) on trace elements in five CRPG geochemical reference samples: Basalt BR; Granites, GA and GH; Micas, Biotite Mica-Fe and Phlogopite Mica-Mg. Geostand. Newslett., 12, 119-203. DOI: https://doi.org/10.1111/j.1751-908X.1988.tb00045.x
HENDERSON, P., 1983. Rare Earth Element Geochemistry. Developments in Geochemistry, 2. Elsevier, Amsterdam.
KANE, J.S., 1991. Derivation of recommended values: an opinion. Geostand. Newslett., 15, 13-21. DOI: https://doi.org/10.1111/j.1751-908X.1991.tb00091.x
LISTER, B., 1982. Evaluation of analytical data: A practical guide for geoanalysts. Geostand. Newslett., 6, 175-205. DOI: https://doi.org/10.1111/j.1751-908X.1982.tb00353.x
ROCHE, H. DE LA y K. GOVINDARAJU, 1971. Rapport sur un minerai d'aluminum bauxite BX-N et sur un réfractaire silico-aluminex disthtme DT -N proposés como étalons analytiques. Soc. Franç. Céram. Bull., 90, 3-19.
STEELE, T. W., J. LEVIN y I. COPELOWITZ, 1975. The preparation and certification of a reference sample of a precious-metal ore. National Institute for Metallurgy, Randburg 2125, Rep. of South Africa, Report No. 1696, 50 p.
STOCH, H., T. W. STEELE y I. COPELOWITZ, 1976. The establishment of preferred values for a series of rare-earth samples. National Institute for Metallurgy, Randburg 2125, Rep. of South Africa, Report No, 1807, 35 p.
STOCH, H. y T. W. STEELE, 1978. Analyses, by several laboratories, of three ferromanganese slags. National Institute for Metallurgy, Randburg 2125, Rep. of South Africa, Report No. 1965, 34 p.
VELASCO, F. y S. P. VERMA, 1991. GEOBAS: Sistema de compilación y análisis estadístico para Muestras Internacionales de Referencia Geoquímica. En: S. P. VERMA, J. A. RAMIREZ F., C. O. RODRIGUEZ DE B., J. M. BARBARIN C., G. IZQUIERDO M., M. A. ARMIENTA H. y D. J. TERREU (Eds.) Actas Fac. Ciencias Tierra UANL Linares, 6, 11-16.
VERMA, S. P., 1989. Analytical techniques for the Rare-Earth Elements in geological samples. Proc. Symp. Geochem., Chem. Phys. Min., Bangalore, 27 July, 1989, 33-38 (resumen extenso).
VERMA, S. P., 1991a. Determination of thirteen Rare-Earth Elements by High-Performance Liquid Chromatography in thirty and of K, Rb, Cs, Sr and Ba by Isotope Dilution Mass Spectrometry in eighteen International Geochemical Reference Samples. Geostand. Newslett., 15, 129-134. DOI: https://doi.org/10.1111/j.1751-908X.1991.tb00104.x
VERMA, S. P., 1991b. Usefulness of Liquid Chromatography for determination of thirteen Rare Earth Elements in rocks and minerals. Lanthan. Actin. Res., 3, 237-257.
VERMA, S. P., T. BESCH, M. GUEYARA y SCHULZ DOBRICH, 1991. Determinación de elementos traza y elementos mayores en estándares geoquímicos internacionales de referencia por fluorescencia de rayos-X. En: S. P. VERMA, J. A. RAMIREZ F., C. O. RODRIGUEZ DE B., J. M. BARBAR/N C., G. IZQUIERDO M., M. A. ARMIENTA H. y D. J. TERREU (Eds.) Actas Fac. Ciencias Tierra UANL Linares, 6, 17-21.
VERMA, S. P. , T. BESCH, M. GUEYARA y B. SCHULZ-DOBRICH, 1992. Determination of twelve trace elements in twenty-seven and ten major elements in twenty-three Geochemical Reference Samples by X-ray fluorescence spectrometry. Geostand. Newslett., 16, 301-309. DOI: https://doi.org/10.1111/j.1751-908X.1992.tb00493.x
VERMA, S. P., M. GUEYARA, T. BESCH y B. SCHULZ DOBRICH, 1993. Elementos traza y mayores en muestras internacionales de referencia geoquímica por fluorescencia de rayos-X. Geofísica Internacional, Número Especial sobre Geoquímica en México (Eds. S. P. VERMA, C. O. RODRIGUEZ DE BARBARIN y J. A. RAMIREZ F.), 32, (este número). DOI: https://doi.org/10.22201/igeof.00167169p.1993.32.2.564
YOSHIDA, K. y H. HARAGUCHI, 1984. Determination of Rare Earth Elements by Liquid Chromatography/Inductively Coupled Plasma Atomic Emission Spectrometry. Anal. Chem., 56, 2580-2585. DOI: https://doi.org/10.1021/ac00277a069