The Composition and Origin of the Kef Lakhal Amphibolites and Associated Amphibolite and Olivine-rich Enclaves, Edough, Annaba, NE Algeria

Y. Ahmed-Said^† and B. E. Leake^*

Oum-Toub (Skikda), BP56, 21450, Algeria
^* 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.

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

Mineralogical Magazine; December 1992 v. 56; no. 385; p. 459-468; DOI: 10.1180/minmag.1992.056.385.02
© 1992, The Mineralogical Society
Mineralogical Society (www.minersoc.org)