Quick Search:    advanced search

GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help

Geological Magazine

This Article Figures Only Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Web of Science (9) Citing Articles via Google Scholar Google Scholar Articles by ZEH, A. Articles by BARTON, J. M. Search for Related Content GeoRef GeoRef Citation

Petrological evolution in the roof of the high-grade metamorphic Central Zone of the Limpopo Belt, South Africa

ARMIN ZEH^*,, REINER KLEMD^*, and JAY M. BARTON, JR

^* Mineralogisches Institut, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
Department of Geology, Rand Afrikaans University, P.O. Box 524, Auckland Park 2006, Johannesburg, South Africa

Author for correspondence: armin.zeh{at}mail.uni-wuerzburg.de

In this study we present new petrological results from the Endora Klippe in the Central Zone of the Limpopo Belt, which may result from horizontal tectonics during the Proterozoic at c. 2.0 Ga. Microstructures, assemblages and garnet zonation patterns observed in metapelitic rocks provide evidence that the Endora Klippe rocks underwent a contemporaneous pressure–temperature increase from c. 600 °C/5 kbar to 650 °C/6.5 kbar. This is inferred by the use of conventional geothermobarometry and interpretations based on quantitative phase diagrams in the system MnO–(TiO₂)–(CaO)–(Na₂O)–K₂O–MgO–Al₂O₃–SiO₂–H₂O. Thus, the petrological results indicate that this part of the Central Zone only underwent a medium-grade metamorphic overprint during a single orogenic event and was never affected by granulite-facies metamorphism, as reported from other parts of the Limpopo Belt. The inferred P–T path, in combination with previous structural and petrological results, leads to the conclusion that the area surrounding the Endora Klippe forms the roof zone of the c. 2.0 Ga old granulite-facies rocks forming wide parts of the Limpopo Central Zone.

Key Words: Limpopo Belt • P-T path • phase diagrams • garnet • metapelites

This article has been cited by other articles:

				A. Zeh, A. Gerdes, and J. M. Barton Jr Archean Accretion and Crustal Evolution of the Kalahari Craton--the Zircon Age and Hf Isotope Record of Granitic Rocks from Barberton/Swaziland to the Francistown Arc J. Petrology, May 11, 2009; (2009) egp027v1. [Abstract] [Full Text] [PDF]

				T.C. Chudy, A. Zeh, A. Gerdes, R. Klemd, and J.M. Barton Jr. Palaeoarchaean (3.3 Ga) mafic magmatism and Palaeoproterozoic (2.02 Ga) amphibolite-facies metamorphism in the Central Zone of the Limpopo Belt: New geochronological, petrological and geochemical constraints from metabasic and metapelitic rocks from the Venetia area South African Journal of Geology, December 1, 2008; 111(4): 387 - 408. [Abstract] [Full Text] [PDF]

				A. Zeh, A. Gerdes, R. Klemd, and J. M. Barton Jr Archaean to Proterozoic Crustal Evolution in the Central Zone of the Limpopo Belt (South Africa-Botswana): Constraints from Combined U-Pb and Lu-Hf Isotope Analyses of Zircon J. Petrology, August 1, 2007; 48(8): 1605 - 1639. [Abstract] [Full Text] [PDF]

				J.M. Barton Jr., R. Klemd, and A. Zeh The Limpopo Belt: A result of Archean to Proterozoic, Turkic-type orogenesis? Geological Society of America Special Papers, January 1, 2006; 405(0): 315 - 332. [Abstract] [Full Text] [PDF]