Pressure-temperature conditions in the Wadi Kid metamorphic complex

Implications for the pan-african event in SE Sinai

Arthur P S Reymer*, Alan Matthews, Oded Navon

*Corresponding author for this work

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Geothermobarometry using continuous equilibria in pelitic rocks of the central and northeastern Wadi Kid areas, Sinai, yields pressure estimates of 320 MPa (3.2 kbar) and temperature estimates of 565° C and >620° C for staurolite-andalusite zone assemblages and anatectic rocks, respectively. This corresponds to geothermal gradients of 47° C/km and ≧50° C/km. These P-T conditions are shown to be compatible with burial under a volcanic cover. The principal heat source for high-grade metamorphism and anatexis is thought to be rising magmatic diapirs. Uplift was relatively slow and the final stages of heating and early stages of cooling probably occurred isobarically. The data imply a high heat flow regime for the Pan-African event in Sinai.

Original languageEnglish
Pages (from-to)336-345
Number of pages10
JournalContributions to Mineralogy and Petrology
Volume85
Issue number4
DOIs
Publication statusPublished - Dec 1984
Externally publishedYes

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