首页|期刊导航|中国地球化学学报（英文版）|Mineralization of pegmatites in parts of the Oban Massif, Southeastern Nigeria: A preliminary analysis
中国地球化学学报（英文版）2009，Vol.28Issue(2)：146-153,8.DOI:10.1007/s11631-009-0146-2
Mineralization of pegmatites in parts of the Oban Massif, Southeastern Nigeria: A preliminary analysis
Mineralization of pegmatites in parts of the Oban Massif, Southeastern Nigeria: A preliminary analysis
摘要
Abstract
The Oban Basement Massif of southeastern Nigeria is composed of metamorphosed rocks including phyllites, schists, gneisses and amphibolites cut by pegmatitic dykes of varying length and thickness, which intruded the metamorphic rocks. Preliminary geochemical study and analysis of these pegmatites from western Oban Massif at Uyanga, Akwa Ibami, Iwuru I, Iwuru II and Igbofia showed that the pegmatites are highly albitized. This is inconsistent with earlier postulations that the pegmatites in this part of Nigeria are barren. Indices of fractionation such as Ba/Rb, K/Rb, Na/K, K/Cs, K/Ba reveal that the pegmatites are mineralized and different discrimination plots show that they are enriched in Li, Be, Sn, Ba, Ta, Ni, Cs, Sn and Zn. Rare metal indicative elements such as Ta, Nb, Rb, Cs, and Sn are enriched in the pegmatites, confirming that the pegmatites are mineralized.关键词
Precambrian pegmatite/mineralization/Oban Massif/rare-earth elementKey words
Precambrian pegmatite/mineralization/Oban Massif/rare-earth element分类
天文与地球科学引用本文复制引用
Kingsley A.Ero,Ekwueme Barth N...Mineralization of pegmatites in parts of the Oban Massif, Southeastern Nigeria: A preliminary analysis[J].中国地球化学学报（英文版）,2009,28(2):146-153,8.基金项目
The authors appreciate Dr. Bassey Ephraim of the Department of Geology, University of Calabar, Nigeria, for his assistance with field work, logistics and sample preparation. The contribution of Mr. E. E. Ukwang to interpretation is also acknowledged. This paper is the outcome of a postgraduate diploma project by Ero K.A. supervised by Prof. Ekvueme B.N. （）
