Dating Late Pan-African Cooling in the Uluguru Granulite Complex Of Eastern Tanzania Using the 40Ar_39Ar Technique

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dc.creatorMaboko, Makenya A. H.
dc.creatorMcdougall, Ian
dc.creatorZeitler, P. K.
dc.date2016-05-12T15:25:54Z
dc.date2016-05-12T15:25:54Z
dc.date1989
dc.date.accessioned2018-03-27T08:57:01Z
dc.date.available2018-03-27T08:57:01Z
dc.descriptionFull text can be accessed at http://www.sciencedirect.com/science/article/pii/0899536289900171
dc.descriptionAge spectra measured by the 40Ar39Ar technique on hornblende, muscovite and K-feldspar from the Uluguru granulite complex of Eastern Tanzania indicate that following granulite facies metamorphism at ∼ 715 Ma the terrane cooled slowly, reaching a temperature of ∼475°C about 630 Ma ago. Subsequent cooling was even slower, reaching temperatures of ∼170°C about 420 Ma ago. Assuming a simple relationship between cooling rate and thermal gradient, the cooling history translates into an uplift path characterized by a phase of rapid uplift soon after granulite facies metamorphism followed by a period of slow uplift which began about 630 Ma ago. Such a history is consistent with model thermal histories of crustal segments undergoing thermal relaxation and isostatically-driven uplift following tectonic thickening events.
dc.identifierMaboko, M.A.H., McDougall, I. and Zeitler, P.K., 1989. Dating late Pan-African cooling in the Uluguru granulite complex of Eastern Tanzania using the 40 Ar 39 Ar technique. Journal of African Earth Sciences (and the Middle East), 9(1), pp.159-167.
dc.identifierhttp://hdl.handle.net/20.500.11810/2006
dc.identifier10.1016/0899-5362(89)90017-1
dc.identifier.urihttp://hdl.handle.net/20.500.11810/2006
dc.languageen
dc.publisherElsevier
dc.titleDating Late Pan-African Cooling in the Uluguru Granulite Complex Of Eastern Tanzania Using the 40Ar_39Ar Technique
dc.typeJournal Article

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