The oldest rocks in West Africa:: SHRIMP zircon age for Early Archean migmatitic orthogneiss at Kaduna, northern Nigeria

被引：64

作者：

Kröner, A ^{[1
]}

Ekwueme, BN ^{[1
]}

Pidgeon, RT ^{[1
]}

机构：

[1] Univ Mainz, Inst Geowissensch, D-55099 Mainz, Germany

来源：

JOURNAL OF GEOLOGY | 2001年 / 109卷 / 03期

关键词：

D O I：

10.1086/319979

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

Zircons extracted from a migmatitic orthogneiss of granodioritic composition from Kabala, Kaduna area of northern Nigeria, yielded a SHRIMP Pb-207/Pb-206 zircon age of Ma, indicating that Early Archean crust is exposed in 3571 +/- 3 the Nigerian basement complex. The Kabala gneisses are the oldest rocks known so far from the West African shield, and indications for rocks of similar age have recently been reported from the Reguibat and Kenema-Man shields in West Africa, suggesting a possible link between these terrains in Early Archean time.

引用

页码：399 / 406

页数：8

共 52 条

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