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Highly precise Re-Os dating for molybdenite using alkaline fusion and NTIMS

Talanta

By:
, , and
DOI: 10.1016/S0039-9140(97)00198-7

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Abstract

The technique described in this paper represents the modification and combination of two previously existing methods, alkaline fusion and negative thermal ion mass spectrometry (NTIMS). We have used this technique to analyze repeatedly a homogeneous molybdenite powder used as a reference standard in our laboratory. Analyses were made over a period of 18 months, using four different calibrations of two different spike solutions. The age of this standard reproduces at a level of ?? 0.13%. Each individual age analysis carries an uncertainty of about 0.4% that includes the uncertainty in the decay constant for 187Re. This new level of resolution has allowed us to recognize real differences in ages for two grain-size populations of molybdenite from some Archean samples.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Highly precise Re-Os dating for molybdenite using alkaline fusion and NTIMS
Series title:
Talanta
DOI:
10.1016/S0039-9140(97)00198-7
Volume
45
Issue:
5
Year Published:
1998
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Talanta
First page:
935
Last page:
946