The importance of being alkaline-deformed late Archaean lamprophyric dykes central zone, Limpopo Belt.

Watkeys, M. K.; Armstrong, R. A.

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The importance of being alkaline-deformed late Archaean lamprophyric dykes central zone, Limpopo Belt.

Date

1985

Authors

Watkeys, M. K.

Armstrong, R. A.

Abstract

The central zone of the Limpopo belt was intruded at approx 2650 m.y. by a suite of mantle-derived dykes with basanite to phonolite compositions. Subsequently, these dykes were deformed and metamorphosed during a regional retrogressive amphibolite event. This suite may be indicative of a period of extensional tectonics that followed a rapid uplift of the region caused by rebound of a subducted slab. The dykes possibly represent a late Archaean metasomatic event in the upper mantle beneath Africa. (Authors' abstract)-C.N.

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https://dspace-test.anu.edu.au/handle/1885/733730786

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DevOps Pure Testing

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South African Journal of Geology

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Article

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The importance of being alkaline-deformed late Archaean lamprophyric dykes central zone, Limpopo Belt.

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