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Investigation of excess argon in ultramafic rocks from the Kola Peninsula by the40Ar/39Ar method

✍ Scribed by Ichiro Kaneoka

Book ID
115853561
Publisher
Elsevier Science
Year
1974
Tongue
English
Weight
835 KB
Volume
22
Category
Article
ISSN
0012-821X

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Heterogeneous excess argon and Neoproter
Heterogeneous excess argon and Neoproterozoic heating in the Usagaran Orogen, Tanzania, revealed by single grain 40Ar/39Ar thermochronology
✍ Steven M. Reddy; Alan S. Collins; Craig Buchan; Abdul H. Mruma πŸ“‚ Article πŸ“… 2004 πŸ› Elsevier Science 🌐 English βš– 761 KB

Existing tectonic models for the evolution of the Usagaran Orogen place much significance on Palaeoproterozoic K-Ar and Rb-Sr ages. Laser 40 Ar/ 39 Ar data from single mica grains from the Isimani Suite near the western margin of the orogen indicate that excess 40 Ar is common in micas and this cast