A LASER MICROANALYSIS TECHNIQUE TO STUDY GALENA CRYSTALS FOR LEAD ISOTOPES INVESTIGATION

Authors
CHERNYSHEV IV KARPENKO MI TROITSKY VA SHCHERBININA NK
Citation
Iv. Chernyshev et al., A LASER MICROANALYSIS TECHNIQUE TO STUDY GALENA CRYSTALS FOR LEAD ISOTOPES INVESTIGATION, Geohimia, (10), 1993, pp. 1487-1491
Citations number
10
Categorie Soggetti
Geosciences, Interdisciplinary
Journal title
Geohimia → ACNP
ISSN journal
00167525
Issue
10
Year of publication
1993
Pages
1487 - 1491
Database
ISI
SICI code
0016-7525(1993):10<1487:ALMTTS>2.0.ZU;2-Y
Abstract
A laser technique of local microanalysis has been devepoled to study l ead isotope variations in galena crystals. Polished sections are used to get samples. Sampling conditions correspond to requirements of the high-precision mass-spectrometric analysis of lead isotope ratios. It has been shown that lead isotope fractionation during galena evaporati on under the laser beam does not introduce into the total error (0.1 - 0.15% as 2sigma) of the isotope analysis. The linear dimensions of an alytical spot vary from 1000 to 20 - 20 mum.