Dating basaltic volcanism in the Neoarchaean Sukumaland Greenstone Belt of the Tanzania Craton using the Sm-Nd method: implications for the geological evolution of the Tanzania Craton

Simple item page
dc.contributor.authorManya, Shukrani
dc.contributor.authorMaboko, Makenya A. H.
dc.date.accessioned2015-09-28T13:35:37Z
dc.date.available2015-09-28T13:35:37Z
dc.date.issued2003
dc.description.abstractMetabasalts from the Sukumaland Greenstone Belt of north western Tanzania yield a whole rock Sm–Nd isochron age of 2823 ± 44 Ma (initial ε(Nd) = 2.7, MSWD = 1.24). This age, which is interpreted as dating the eruption of the oldest mafic volcanics in the belt, is at the 95% confidence level indistinguishable from 2780 ± 3 and 2808 ± 3Ma single zircon U–Pb ages previously reported from stratigraphically higher rhyolitic pyroclastic rocks from the southern margin of the belt. The age equivalency suggests that the entire∼5–7 km thick greenstone sequence that has been traditionally classified into a predominantly mafic lower part overlain by an upper part in which felsic volcanics and BIF predominate, was emplaced within a relatively short time interval not exceeding ∼44 Ma. The Sm–Nd age of the metabasalts is significantly older than a published zircon U–Pb age of 2680 ± 3Ma obtained from a migmatitic gneiss on the southernmost fringe of the Sukumaland Greenstone Belt. This corroborates previous evidence that high-grade metamorphism in the Tanzania Craton postdates emplacement of the greenstones and is most likely associated with the regional emplacement of the large granitic bodies that intrude and flank the greenstones.en_US
dc.description.sponsorshipSida/SARECen_US
dc.identifier.citationManya, S., Maboko, M.A.H., 2003. Dating basaltic volcanism in the Neoarchaean Sukumaland Greenstone Belt of the Tanzania Craton using the Sm-Nd method: implications for the geological evolution of the Tanzania Craton. Precambrian Research 121, 35 - 45.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/110
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.subjectTanzania Cratonen_US
dc.subjectGreenstone Belten_US
dc.subjectMetabasaltsen_US
dc.subjectGranitoidsen_US
dc.subjectSm–Nd datingen_US
dc.titleDating basaltic volcanism in the Neoarchaean Sukumaland Greenstone Belt of the Tanzania Craton using the Sm-Nd method: implications for the geological evolution of the Tanzania Cratonen_US
dc.typeJournal Article, Peer Revieweden_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Dating basaltic volcanism in the Neoarchaean Sukumaland Greenstone Belt of the Tanzania Craton using the Sm–Nd method.pdf
Size:
369.45 KB
Format:
Adobe Portable Document Format
Description:
Abstract
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Department of Geology
Department of Geosciences