globalchange  > 影响、适应和脆弱性
DOI: 10.1007/s00531-014-1138-y
Scopus记录号: 2-s2.0-84931569840
论文题名:
New investigations in southwestern Guinea: consequences for the Rokelide belt (West Africa)
作者: Villeneuve M.; Bellon H.; Corsini M.; Le Metour J.; Chatelee S.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2015
卷: 104, 期:5
起始页码: 1267
结束页码: 1275
语种: 英语
英文关键词: Bassaride belt ; Geodynamic models ; Guinea ; Radiometric ages (K–Ar and 40Ar–39Ar) ; Rokelide belt ; West Africa
Scopus关键词: argon-argon dating ; geochronology ; geodynamics ; Pan African orogeny ; potassium-argon dating ; tectonic evolution ; terrane ; Guinea ; Senegal ; Sierra Leone
英文摘要: The southern Guinean terranes belong to the “Rokelide belt” that is located in the southwestern part of the West African craton (Senegal to Liberia). Field investigations and K–Ar and 40Ar–39Ar radiometric analysis performed on samples collected from southern Guinea provide a new interpretation for metamorphic terranes not yet dated. A K–Ar whole-rock age of a gneiss and 40Ar–39Ar plateau ages of amphiboles separated from a mylonitic gneiss of the Ouankifondi formation and a gneiss from the Kissi-Kissi formation yield several Pan-African metamorphic ages at circa 650, 560, and 530 Ma, respectively. Field investigations show that these formations are unconformably capped by the Kolente group. The previous structural framework and the geodynamic evolution of the Rokelide belt based on the coeval evolution of the Ouankifondi and Kissi-Kissi formations and the Kolente group are reassessed. The Rokelide belt is linked to the Bassaride belt. Correlations with adjacent Sierra Leonean terranes and with northern Guinea and Senegal are considered. © 2015, Springer-Verlag Berlin Heidelberg.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84931569840&doi=10.1007%2fs00531-014-1138-y&partnerID=40&md5=45d42cad779236a8e1f910fa1d5cf1b9
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70286
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: CEREGE, Université d’Aix-Marseille, case 67, 3, place Victor Hugo, Marseille, France; UMR CNRS 6538, UBO, IUEM, Université européenne de Bretagne, Place Nicolas Copernic, Plouzané, France; Geoazur, Université de Nice-Sophia Antipolis, 250, rue A.Einstein, Valbonne, France; BRGM, avenue Claude Guillemin, B.P. 6009, Orleans Cedex 2, France

Recommended Citation:
Villeneuve M.,Bellon H.,Corsini M.,et al. New investigations in southwestern Guinea: consequences for the Rokelide belt (West Africa)[J]. International Journal of Earth Sciences,2015-01-01,104(5)
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