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Rb-Sr ages of the encrucijada granite intrusive in the Imataca Complex, Venezuela

✍ Scribed by V.G. Posadas; J. Kalliokoski


Book ID
115852400
Publisher
Elsevier Science
Year
1967
Tongue
English
Weight
386 KB
Volume
2
Category
Article
ISSN
0012-821X

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Sixty-four Rb-Sr and two K-At isotopic measurements from seven ring complexes in central Nigeria provide evidence for a systematic age trend along a 200 km zone ranging from 1744-5 m.y. in the north to 154-4-4 m.y. in the south. A peak of anorogenie magmatism occurred in the Jos Plateau region about