Lithostratigraphy and Composition of 2.1 Ga Greenstone Belts of the West African Craton and Their Bearing on Crustal Evolution and the Archean-Prote

Lithostratigraphy and Composition of 2.1 Ga Greenstone Belts of the West African Craton and Their Bearing on Crustal Evolution and the Archean-Prote

Research suggests that magmas formed in Early Proterozoic, West African island arcs had compositions similar to magmas formed in many Archean island arcs and, hence, the Archean-Proterozoic boundary may not coincide with a worldwide, fundamental change in crust-mantle evolution. The Birimian greenst...

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Veröffentlicht in:The Journal of geology 1992-07, Vol.100 (4), p.377
Hauptverfasser: Sylvester, Paul J, Attoh, Kodjopa
Format: Artikel
Sprache:eng
Schlagworte:
Evolution
Geology
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Zusammenfassung:Research suggests that magmas formed in Early Proterozoic, West African island arcs had compositions similar to magmas formed in many Archean island arcs and, hence, the Archean-Proterozoic boundary may not coincide with a worldwide, fundamental change in crust-mantle evolution. The Birimian greenstone belts are discussed.
ISSN:0022-1376
1537-5269