Skip Navigation

This Article
Right arrow Full Text Freely available
Right arrow FREE Full Text (PDF) Freely available
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrow Search for citing articles in:
ISI Web of Science (9)
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by JOHNSON, S. P.
Right arrow Articles by OLIVER, G. J. H.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Journal of Petrology Volume 43 Number 2 Pages 271-290 2002
© Oxford University Press 2002

High fO2 Metasomatism During Whiteschist Metamorphism, Zambezi Belt, Northern Zimbabwe

S. P. JOHNSON,* and G. J. H. OLIVER

CRUSTAL GEODYNAMICS GROUP, SCHOOL OF GEOGRAPHY AND GEOSCIENCES, UNIVERSITY OF ST. ANDREWS, ST. ANDREWS KY16 9AL, UK

The Kadunguri Whiteschists are a group of talc- and kyanite-bearing lithologies that occur in the Chewore Inliers from the Zambezi Belt of northern Zimbabwe. They crop out on the southern margin of the Chewore Ophiolite Terrane, a Mesoproterozoic ophiolite and island arc, as a 5 km x 1·5 km, southeasterly dipping, semi-continuous block, and contain the second known natural occurrence of yoderite. Major element analyses define the whiteschists within the relatively simple MFASH system. Major and trace element analyses indicate that the whiteschists originate from the metasomatic alteration of alkalic ocean-island-type metabasalts similar to those in the underlying Ophiolite Terrane. Synmetamorphic or metasomatic mineral parageneses indicate peak P–T conditions of between 13 and 15 kbar at 550–600°C, and the highly oxidizing nature of all reactions indicates the presence of a high fO2 metasomatic fluid. The peak P–T conditions require that this synmetamorphic, exotic metasomatic fluid was available at depths near 55 km. The age of high-pressure metamorphism is constrained within the Pan African tectonothermal cycle at 550–520 Ma. Tectonometamorphism in the Zambezi Belt is related to a period of extensive crustal thickening possibly related to amalgamation of Gondwanaland.

KEY WORDS: Congo Craton; high pressure; Kalahari Craton; metasomatism; whiteschist; Zambezi Belt


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 Journal of the Geological SocietyHome page
H. R. Marschall, A. V. Korsakov, G. L. Luvizotto, L. Nasdala, and T. Ludwig
On the occurrence and boron isotopic composition of tourmaline in (ultra)high-pressure metamorphic rocks
Journal of the Geological Society, July 1, 2009; 166(4): 811 - 823.
[Abstract] [Full Text] [PDF]

Home page
 Eur J MineralHome page
D. J. Henry, H. Sun, J. F. Slack, and B. L. Dutrow
Tourmaline in meta-evaporites and highly magnesian rocks: perspectives from Namibian tourmalinites
European Journal of Mineralogy, October 1, 2008; 20(5): 889 - 904.
[Abstract] [Full Text] [PDF]

Home page
 J PetrologyHome page
S. P. Johnson, B. de Waele, F. Tembo, C. Katongo, K. Tani, Q. Chang, T. Iizuka, and D. Dunkley
Geochemistry, Geochronology and Isotopic Evolution of the Chewore-Rufunsa Terrane, Southern Irumide Belt: a Mesoproterozoic Continental Margin Arc
J. Petrology, July 1, 2007; 48(7): 1411 - 1441.
[Abstract] [Full Text] [PDF]

Home page
 Journal of the Geological SocietyHome page
S. P. Johnson, T. Rivers, and B. De Waele
A review of the Mesoproterozoic to early Palaeozoic magmatic and tectonothermal history of south-central Africa: implications for Rodinia and Gondwana
Journal of the Geological Society, May 1, 2005; 162(3): 433 - 450.
[Abstract] [Full Text] [PDF]

Home page
 J PetrologyHome page
N. JONS and V. SCHENK
Petrology of Whiteschists and Associated Rocks at Mautia Hill (Tanzania): Fluid Infiltration during High-Grade Metamorphism?
J. Petrology, October 1, 2004; 45(10): 1959 - 1981.
[Abstract] [Full Text] [PDF]


Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.