Geochemistry and geochronology of Neoarchaean volcanic rocks of the Iramba–Sekenke greenstone belt, central Tanzania

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• 作者：Shukrani Manya ; Makenya A.H. Maboko
• 关键词：Tanzania Craton ; Iramba– ; Sekenke ; Greenstone Belt ; Sm– ; Nd geochronology ; Basalts ; Geochemistry
• 刊名：Precambrian Research
• 出版年：2008
• 出版时间：10 June 2008
• 年：2008
• 卷：163
• 期：3-4
• 页码：265-278
• 全文大小：1301 K

文摘

The late Archaean volcanic rocks of the Iramba–Sekenke greenstone belt consist of tholeiitic basalts and basaltic andesites that are associated with a subordinate amount of intermediate to felsic volcanic rocks. Sm–Nd geochronology shows that the entire volcanic suite was emplaced at 2742 ± 27 Ma (MSWD = 1.6, http://www.sciencedirect.com/scidirimg/entities/25b.gif"" alt=""var epsilon"" title=""var epsilon"" border=""0"">_Nd = 2.3).