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DOI | 10.1016/j.jafrearsci.2014.05.011 |
Neoproterozoic post-collisional granitoids in the Central Eastern Desert of Egypt: Petrological and geochemical constraints | |
Osman, Ali F.; El Kalioubi, Baher A. | |
通讯作者 | Osman, Ali F. |
来源期刊 | JOURNAL OF AFRICAN EARTH SCIENCES
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ISSN | 1464-343X |
EISSN | 1879-1956 |
出版年 | 2014 |
卷号 | 99页码:39-50 |
英文摘要 | The Um Had and Urn Effein (UHUE), Central Eastern Desert of Egypt, are elliptical and circular bodies of monzogranite to syenogranite with subordinate alkali feldspar granite. The UHUE granites are quite evolved (SiO2 = 67-74 wt.%), and have characteristics of high-K calc-alkaline peraluminous rocks. They are relatively enriched in K, Ba, La, Rb, Zr and total REEs, while are depleted in Sr, Y, Ti, HREE. The rocks have LREE-enriched patterns with significant negative Eu anamolies suggesting post-collision granites. The gradual increase of Rb/Sr and Rb/Ba ratios from the monzogranite to the alkali feldspar granites indicates that these granites are genetically related. The various geochemical discrimination diagrams strongly suggest that the studied granitoids were generated from crustal sources through fractional crystallization with some crustal contamination which have played a major role during the magmatic evolution of the plutons. These granites display transitional character from orogenic calc-alkaline arc-type up to subsequent anorogenic within-plate environments, suggesting continuous crystallization of magma in a transitional "post-collision" tectonic setting. This transition from compression to extension was controlled mainly by lithospheric delamination following continental collision in the Eastern Desert of Egypt. (C) 2014 Elsevier Ltd. All rights reserved. |
英文关键词 | Neoproterozoic Central Eastern Desert Geochemistry Tectonic setting Egypt |
类型 | Article |
语种 | 英语 |
国家 | Egypt |
收录类别 | SCI-E |
WOS记录号 | WOS:000345540900005 |
WOS关键词 | ARABIAN-NUBIAN-SHIELD ; A-TYPE GRANITES ; K CALC-ALKALINE ; CRUSTAL EVOLUTION ; AFRICAN OROGEN ; PLUTONIC ROCKS ; PETROGENESIS ; DISCRIMINATION ; MAGMATISM ; COMPLEX |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/182873 |
作者单位 | Ain Shams Univ, Fac Sci, Dept Geol, Cairo, Egypt |
推荐引用方式 GB/T 7714 | Osman, Ali F.,El Kalioubi, Baher A.. Neoproterozoic post-collisional granitoids in the Central Eastern Desert of Egypt: Petrological and geochemical constraints[J],2014,99:39-50. |
APA | Osman, Ali F.,&El Kalioubi, Baher A..(2014).Neoproterozoic post-collisional granitoids in the Central Eastern Desert of Egypt: Petrological and geochemical constraints.JOURNAL OF AFRICAN EARTH SCIENCES,99,39-50. |
MLA | Osman, Ali F.,et al."Neoproterozoic post-collisional granitoids in the Central Eastern Desert of Egypt: Petrological and geochemical constraints".JOURNAL OF AFRICAN EARTH SCIENCES 99(2014):39-50. |
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