TY  - JOUR
A1  - Zobir, Soraya Hadj
A1  - Altenberger, Uwe
A1  - Günter, Christina
T1  - Geochemistry and petrology of metamorphosed submarine basic ashes in the Edough Massif (Cap de Garde, Annaba, northeastern Algeria)
JF  - Comptes rendus geoscience
N2  - The study presents the first evidence of metamorphosed submarine ashes in the Edough Massif, in northeastern Algeria. It occurs below the greenschist-facies Tellian units that represent the thrusted Mesozoic to Eocene passive paleomargin of northern Africa deposited on thinned continental crust. The metamorphic complex consists of tectonically superposed units composed of gneisses (lower unit) and micaschists (upper unit). At the Cap de Garde, these units enclose an "intermediate unit" composed of micaschists and meter-thick layers of marbles, which are sometimes intercalated with amphibolites. The latter occur as discontinuous small lenses and layers. The amphibolites are parallel to the primary bedding of the marbles and the main foliation. Chemical markers and field observations indicate that they are metamorphic equivalents of basic igneous rocks. The lenticular character, low thickness and multiple intercalations with marine sediments and the unusual high lithium concentrations suggest subaqueous near-source basaltic ash-fall deposits in a marine environment. (C) 2014 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.
KW  - Amphibolites
KW  - Submarine sediments
KW  - Basaltic ash-fall deposits
KW  - Edough
KW  - Algeria
Y1  - 2014
U6  - https://doi.org/10.1016/j.crte.2014.09.002
SN  - 1631-0713
SN  - 1778-7025
VL  - 346
IS  - 9-10
SP  - 244
EP  - 254
PB  - Elsevier
CY  - Paris
ER  -