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87Sr/86Sr in Precambrian carbonates as an index of crustal evolution

✍ Scribed by Ján Veizer; William Compston


Book ID
118218689
Publisher
Elsevier Science
Year
1976
Tongue
English
Weight
950 KB
Volume
40
Category
Article
ISSN
0016-7037

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Carbonates in a 30 cm wide zoned kimberlite dyke from the De Beers Mine, Kimberley, S. Africa were studied by cathodoluminescence and electron microprobe techniques and their S7Sr/86Sr ratios were measured using an AEI-IM20 ion microprobe. Primary carbonates (including calcite dendrites, rhombohedra

Anomalous unradiogenic 87Sr//86Sr ratios
✍ R. L. Romer; N. Wawrzenitz; R. Oberhänsli 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 542 KB

## Abstract Marbles from Changpu (Dabie Shan, eastern China), subducted to 4.4 GPa, have ^87^Sr/^86^Sr values < 0.7040. These low ^87^Sr/^86^Sr values, which would imply a sedimentation age > 2 Ga if considered as primary signature, reflect fluid–rock interaction with a fluid from a low‐^87^Sr/^86^