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The Archean of the Baltic Shield: Geology, Geochronology, and Geodynamic settings

✍ Scribed by A. I. Slabunov; S. B. Lobach-Zhuchenko; E. V. Bibikova; V. V. Balagansky; P. Sorjonen-Ward; O. I. Volodichev; A. A. Shchipansky; S. A. Svetov; V. P. Chekulaev; N. A. Arestova; V. S. Stepanov


Book ID
110164361
Publisher
SP MAIK Nauka/Interperiodica
Year
2006
Tongue
English
Weight
724 KB
Volume
40
Category
Article
ISSN
0016-8521

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Uranium-lead geochronology of the Archea
✍ Carla W. Montgomery πŸ“‚ Article πŸ“… 1979 πŸ› Springer 🌐 English βš– 910 KB

Uranium and lead isotopic analyses of totalrock and feldspar samples from the Imataca Series indicate an early Archean (3.5 + b,y.) age for the basement gneisses. Lead isotopic evolution in most gneiss samples may approximately be described by a three-stage model. The start of the third stage is mar