Isotopic Dating of Neoproterozoic Crustal Growth in the Usambara Mountains of Northeastern Tanzania: Evidence for Coeval Crust Formation in the Mozambique Belt and the Arabian–Nubian Shield

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dc.contributor.authorMaboko, Makenya A. H.
dc.contributor.authorNakamura, Eizo
dc.date.accessioned2016-05-12T15:27:30Z
dc.date.available2016-05-12T15:27:30Z
dc.date.issued2002
dc.descriptionFull text can be accessed at http://www.sciencedirect.com/science/article/pii/S0301926801002133en_US
dc.description.abstractGranulite-facies orthogneisses of andesitic to dacitic composition in the Usambara Mountains of north eastern Tanzania yield a Sm–Nd whole rock isochron age of 815±58 Ma and an initial ε(Nd) value of 4.1. This age is interpreted as dating Sm–Nd fractionation during extraction from the mantle and immediate subsequent crystallisation of the granulite protolith during an event of regional calc-alkaline magmatism in the area. Isotopic and geochemical characteristics of the rocks are consistent with a convergent margin setting for the magmatism with minimal contamination by older continental crust. The isotopic data from the Usambara Mountains demonstrate that Neoproterozoic crust formation in the Arabian–Nubian Shield and parts of the Mozambique Belt was broadly contemporaneous.en_US
dc.identifier.citationMaboko, M.A.H. and Nakamura, E., 2002. Isotopic dating of Neoproterozoic crustal growth in the Usambara Mountains of Northeastern Tanzania: evidence for coeval crust formation in the Mozambique Belt and the Arabian–Nubian Shield. Precambrian Research, 113(3), pp.227-242.en_US
dc.identifier.doi10.1016/S0301-9268(01)00213-3
dc.identifier.urihttp://hdl.handle.net/20.500.11810/2011
dc.language.isoenen_US
dc.subjectMozambique Belten_US
dc.subjectTanzaniaen_US
dc.subjectSm–Nd geochronologyen_US
dc.subjectCrust formationen_US
dc.subjectGranulitesen_US
dc.titleIsotopic Dating of Neoproterozoic Crustal Growth in the Usambara Mountains of Northeastern Tanzania: Evidence for Coeval Crust Formation in the Mozambique Belt and the Arabian–Nubian Shielden_US
dc.typeJournal Articleen_US
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