Rare-earth elements of granitoid rocks of St. Katherine area, South Sinai, Egypt

Hassen Imbarak Sayed and Buda György: Rare-earth elements of granitoid rocks of St. Katherine area, South Sinai, Egypt. In: Acta mineralogica-petrographica, (37). pp. 75-82. (1996)

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Abstract

A group of granitic plutons and stocks outcrop in St. (Catherine area, South Sinai (Egypt). They belong to the Late Precambrian Pan-African belt. The granitoid rocks occupying St. Kathcrine area are composed of a comagmatic plutons and classified into three main phases according to their field relations and compositions: 1- quartz diorite, granodiorite and quartz monzonite (Gr|), 2- monzogranite and biotite granite (Gr2), 3- syenogranite, alkali feldspar granite and granophyre (Gr3). The distribution of REEs show variations in each phases as well as within one lithological unit which allow the interpretation of complex genesis of the massif. The phase one (Gq) emplaced, as a basic magma in an intermediate magmatic chamber, containing a very low concentrations of REE. This has undergone a fractional crystallization, which resulted in an increase of the amount of £REE (average 102.16 ppm) with the moderately fractionated patterns (La/Sm = 6.07) and no significant negative Eu anomalies are found. Phase two (Gr2) has higher contents of ZREE (average 116.86 ppm), and more fractionated LREE (La/Sm = 7.90) with a small negative Eu-anomalies. Phase three (Gr3) has a high contents of ZREE (average 121.97 ppm) and fractionated LREE pattern with a relatively deep negative Eu-anomalies.

Item Type: Article
Journal or Publication Title: Acta mineralogica-petrographica
Date: 1996
Volume: 37
ISSN: 0365-8066
Page Range: pp. 75-82
Language: English
Publisher: University of Szeged, Department of Mineralogy, Geochemistry and Petrology
Place of Publication: Szeged
Related URLs: http://acta.bibl.u-szeged.hu/39415/
Uncontrolled Keywords: Kőzettan, Ásványtan, Földtan
Additional Information: Bibliogr.: p. 81-82. ; ill. ; összefoglalás angol nyelven
Subjects: 01. Natural sciences
01. Natural sciences > 01.05. Earth and related environmental sciences
Date Deposited: 2016. Oct. 17. 09:25
Last Modified: 2022. Jul. 27. 11:37
URI: http://acta.bibl.u-szeged.hu/id/eprint/24834

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