Uncertainties on lead isotope analyses; deconvolution in the double-spike method

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doi: 10.1016/S0009-2541(98)00023-0
Authors:Powell, Roger; Woodhead, Jon; Hergt, Janet
Author Affiliations:Primary:
University of Melbourne, School of Earth Sciences, Melbourne, Victoria, Australia
Volume Title:Chemical Geology
Source:Chemical Geology, 148(1-2), p.95-104. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0009-2541
Publication Date:1998
Note:In English. 16 refs.; illus.
Summary:A weighted least-squares method is used to generate the "true" lead isotopic composition from measurements on unspiked and spiked aliquots of a sample using the double-spike method. A form for the weighting based on theoretical mass spectrometer errors is used.The least-squares approach is more reliable for this deconvolution of lead isotopic compositions than current methods, and allows uncertainties and correlations on the true isotopic composition to be estimated, a feature of importance in many applications. The approach allows the prediction of run parameters for "optimum" spike analysis. Abstract Copyright (1998) Elsevier, B.V.
Sections:Age determination
Subjects:Chemical analysis; Isotope ratios; Isotopes; Lead; Least-squares analysis; Mass spectroscopy; Metals; Pb-206/Pb-204; Pb-207/Pb-204; Pb-208/Pb-204; Radioactive isotopes; Sample preparation; Spectroscopy; Stable isotopes; Standard materials; Statistical analysis; Theoretical models; Double-spike method
Abstract Numbers:99M/1146
Record ID:1998043002
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands
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