Zircon UPb Chronometry of the Pressure and Temperature History of Granulites in the Musgrave Ranges, Central Australia

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dc.creatorMaboko, Makenya A. H.
dc.creatorWilliams, I. S.
dc.creatorCompston, William
dc.date2016-05-12T15:24:17Z
dc.date2016-05-12T15:24:17Z
dc.date1991
dc.date.accessioned2018-03-27T08:57:02Z
dc.date.available2018-03-27T08:57:02Z
dc.descriptionIon microprobe U-Pb measurements of zircon in the Musgrave Ranges of central Australia date the emplacement of a charnockite, which is cut by a shear zone containing a garnet-clinopyroxene assemblage, M2 (PT conditions {approximately} 11 kb and 720C), at {approximately} 1200 Ma. Veinlets of a post-M2 adamellite cut an M4 assemblage (PT conditions {approximately} 6 kb and 670C) contained in a metadolerite inclusion, suggesting that the adamellite was emplaced during or after M4. Igneous and metamorphic zircons in the adamellite, however, grew at about 1200 Ma, indicating that M2 and M4 were synchronous. At the level of precision of the data, the time interval between the growth of the two assemblages can not have been more than 20 Ma. The authors interpret the pressure, temperature and time (PTt) path obtained by combining the thermobarometric data, and zircon U-Pb ages in terms of magmatic heat input in a thickened crustal segment followed by rapid, possibly tectonically driven, uplift of the lower part of the thickened crust to a depth of 15-20 km
dc.identifierMaboko, M.A.H., Williams, I.S. and Compston, W., 1991. Zircon U-Pb chronometry of the pressure and temperature history of granulites in the Musgrave Ranges, central Australia. The Journal of Geology, pp.675-697.
dc.identifierhttp://hdl.handle.net/20.500.11810/2003
dc.identifier10.1086/629532
dc.identifier.urihttp://hdl.handle.net/20.500.11810/2003
dc.languageen
dc.titleZircon UPb Chronometry of the Pressure and Temperature History of Granulites in the Musgrave Ranges, Central Australia
dc.typeJournal Article

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