The Sidi Mohamed peridotites (Edough Massif, NE Algeria): Evidence for an upper mantle origin

被引：7

作者：

Zobir, Soraya Hadj ^{[1
]}

Oberiiaensli, Roland ^{[2
]}

机构：

[1] Badji Mokhtar Annaba Univ, Lab Soils & Sustainable Dev, Annaba 23000, Algeria

[2] Univ Potsdam, Dept Earth & Environm Sci, D-14476 Potsdam, Germany

来源：

JOURNAL OF EARTH SYSTEM SCIENCE | 2013年 / 122卷 / 06期

关键词：

Peridotites; upper mantle; Edough; Algeria; METAMORPHIC CORE COMPLEX; ULTRAMAFIC XENOLITHS; ANNABA; ROCKS; CLINOPYROXENES; DIATEXITES; EVOLUTION; OPHIOLITE; ATLANTIC; OLIVINE;

D O I：

10.1007/s12040-013-0358-z

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The Hercynian Edough massif is the easternmost crystalline massif of the Algerian coast. It consists of two tectonically superposed units composed of micaschists, gneisses, and peridotite. This study concentrates on the small and isolated Sidi Mohamed peridotite outcrop area (0.03 km(2)). The Sidi Mohamed peridotite is composed mainly of harzburgites (Mg-rich olivine and orthopyroxene as major minerals). The Ni (2051-2920 ppm), Cr (2368-5514 ppm) and MgO (similar to 28-35 wt.%) whole-rock composition and the relative depletion in Nb make these harzburgites comparable to depleted peridotites related to a subduction zone. We suggest that the Sidi Mohamed ultramafic body was derived directly from the upper mantle and tectonically incorporated into the gneiss units of the Edough metamorphic core complex in a subduction environment.

引用

页码：1455 / 1465

页数：11

共 44 条

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SORAYA HADJ ZOBIR
ROLAND OBERHÄNSLI
Journal of Earth System Science, 2013, 122 : 1455 - 1465
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Zobir, Soraya Hadj
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Zobir, S. Hadj
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PETROGENESIS AND EXPLORATION OF THE EARTH'S INTERIOR, 2019, : 235 - 239
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EARTH AND PLANETARY SCIENCE LETTERS, 2017, 474 : 215 - 225

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