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

被引：19

作者：

Powell, R ^{[1
]}

Woodhead, J ^{[1
]}

Hergt, J ^{[1
]}

机构：

[1] Univ Melbourne, Sch Earth Sci, Parkville, Vic 3052, Australia

来源：

CHEMICAL GEOLOGY | 1998年 / 148卷 / 1-2期

关键词：

Pb isotopes; techniques; statistics;

D O I：

10.1016/S0009-2541(98)00023-0

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

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. ii 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. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：95 / 104

页数：10

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