gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1992.056.385.02 Geochemistry and Petrology The Composition and Origin of the Kef Lakhal Amphibolites and Associated Amphibolite and Olivine-rich Enclaves, Edough, Annaba, NE Algeria Ahmed-Said Y. † Oum-Toub (Skikda), BP56, 21450, Algeria Leake B. E. * Department of Geology and Applied Geology, The University, Glasgow G12 8QQ, U.K.

Now Department of Geology and Applied Geology, The University, Glasgow G12 8QQ.

 12 1992 56 385 459 468 23 10 1991 24 2 1992 Copyright © 1992, The Mineralogical Society 1992 Abstract

The Kef Lakhal amphibolites and associated amphibolite and olivine-rich enclaves are described and their major and trace element chemistry indicates that both amphibolites were evolved medium to high alumina tholeiitic basalts with calc-alkaline affinities probably formed within plate settings. The olivine-rich enclaves are disrupted periodotites of the type Iherzolite-harzburgite and probably represent mantle residua after meliting.

 Keywords Algeria amphibolite Edough peridotite Within-Plate tholeiite