Age and geochemistry of coeval felsic volcanism and plutonism in the Palaeoproterozoic Ndembera Group of southwestern Tanzania: Constraints from SHRIMP U-Pb zircon and Sm-Nd data
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- 作者：Gagao Bahame ; Shukrani Manya ; shukrani73@yahoo.com" class="auth_mail" title="E-mail the corresponding author ; Makenya A.H. Maboko
- 关键词：Usagaran Belt ; Ndembera Group ; Palaeoproterozoic ; U&ndash ; Pb zircon geochronology ; Sm&ndash ; Nd isotopes
- 刊名：Precambrian Research
- 出版年：2016
- 出版时间：January 2016
- 年：2016
- 卷：272
- 期：Complete
- 页码：115-132
- 全文大小：6364 K
文摘
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The Ndembera volcanic rocks are calc-alkaline trachyandesites-dacites-trachytes-rhyolites.
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The volcanics are intruded by calc-alkaline I-type granites.
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Both the volcanics and granites form a co-genetic suite that was emplaced at 1.89–1.87 Ga.
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A similar 1.87 Ga co-magmatic event occurred in the nearby Ubendian belt suggesting a regional thermal event.
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The pluto-volcanic suite was generated by crustal anatexis of basic meta-igneous rocks mixed with a minor sedimentary component.