Metamorphic isograds of Uwet area, southeastern Nigeria

Auteurs :
EKWUEME, B. N.
ONYEAGOCHA, A. C.

Description :
The distribution of isograds indicates a northwest to southeast increase in the intensity of metamorphism in the Uwet area from medium greenschist facies to uppermost amphibolite facies. The presence of kyanite and sillimanite indicate high pressure-high temperature Barrovian-type regional metamorphism whereas the absence of staurolite in these alumina-rich rocks is indicative of the high fugacity of oxygen during the metamorphism of the area.


Type de document :
Article de périodique

Source :
Journal of African Earth Sciences Oxford, 1985, vol. 3, n°. 4, p. 443-454, Références bibliographiques : 35 réf.

Date :
1985