Arid
DOI10.1016/j.jafrearsci.2008.01.004
Geochemistry and metamorphism of the Pan-African back-arc Malhaq volcano-sedimentary Neoproterozoic association, W. Kid area, SE Sinai, Egypt
Abu El-Enen, Mahrous M.
通讯作者Abu El-Enen, Mahrous M.
来源期刊JOURNAL OF AFRICAN EARTH SCIENCES
ISSN1464-343X
出版年2008
卷号51期号:4页码:189-206
英文摘要

The northern part of the Kid metamorphic complex, SE Sinai Peninsula, Egypt, comprises a thick sequence of volcano-sedimentary association, defined as Mahlaq Formation. It is composed predominantly of rhyodacitic to andesitic, less commonly of subalkaline basaltic metavolcanics and metatuffs interbedded and intercalated with metapelites and metagraywackes. Their bulk rock chemistry indicates that the magmatic rocks have calc-alkaline affinity, and derived from island are - mid-oceanic ridge transitional regimes, presumably in a back-arc setting. Their peak mineral assemblages, mineral chemistry and calculated P-T metamorphic conditions indicate that the Malhaq association underwent metamorphism of lower amphibolite facies (480-570 degrees C/3-4 kbar), except the extreme northeastern part of upper amphibolite facies (645 degrees C/4.5-5.5 kbar). Geothermal gradients of the investigated metamorphic rocks range from 37 to 43 degrees C/km, may indicate that metamorphism took place in the upper plate of an active continental margin. Three deformation phases, D-1 to D-3, are recognized at the Malhaq nappe area, where peak metamorphic conditions occurred synchronous with the NW-directed thrusting during the D-2 phase. Possible heat sources during metamorphism is that resulted from heating contributing from the mantle derived magma in the documented arc environment in addition to the shear "stress" heating released during thrusting and stacking of the Malhaq nappe pile onto the older continental crust during the Pan-African orogeny. Metamorphic conditions increase northward coincident with NW-ward stacking propagation of the Neoproterozoic nappe that formed when the Mozambique Ocean had closed as a result of the assembly of East and West Gondwana during the Pan-African Orogeny. (C) 2008 Elsevier Ltd. All rights reserved.


英文关键词Arabian-Nubian shield (ANS) Sinai Peninsula Pan-African back-arc volcano-sedimentary association amphibolite facies
类型Article
语种英语
国家Egypt
收录类别SCI-E
WOS记录号WOS:000257007700002
WOS关键词ARABIAN-NUBIAN SHIELD ; EASTERN DESERT ; CORE COMPLEX ; SOUTHEASTERN SINAI ; WADI KID ; REGIONAL METAMORPHISM ; OBLIQUE CONVERGENCE ; CRUSTAL EVOLUTION ; IMMOBILE ELEMENTS ; SOUTHERN ISRAEL
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/2XILL650/157827
作者单位(1)Mansoura Univ, Fac Sci, Dept Geol, Mansoura 35516, Egypt
推荐引用方式
GB/T 7714
Abu El-Enen, Mahrous M.. Geochemistry and metamorphism of the Pan-African back-arc Malhaq volcano-sedimentary Neoproterozoic association, W. Kid area, SE Sinai, Egypt[J],2008,51(4):189-206.
APA Abu El-Enen, Mahrous M..(2008).Geochemistry and metamorphism of the Pan-African back-arc Malhaq volcano-sedimentary Neoproterozoic association, W. Kid area, SE Sinai, Egypt.JOURNAL OF AFRICAN EARTH SCIENCES,51(4),189-206.
MLA Abu El-Enen, Mahrous M.."Geochemistry and metamorphism of the Pan-African back-arc Malhaq volcano-sedimentary Neoproterozoic association, W. Kid area, SE Sinai, Egypt".JOURNAL OF AFRICAN EARTH SCIENCES 51.4(2008):189-206.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Abu El-Enen, Mahrous M.]的文章
百度学术
百度学术中相似的文章
[Abu El-Enen, Mahrous M.]的文章
必应学术
必应学术中相似的文章
[Abu El-Enen, Mahrous M.]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。