Arid
DOI10.1111/j.1525-1314.2009.00827.x
Exhumation during oblique transpression: The Feiran-Solaf region, Egypt
Abu-Alam, T. S.; Stuewe, K.
通讯作者Abu-Alam, T. S.
来源期刊JOURNAL OF METAMORPHIC GEOLOGY
ISSN0263-4929
出版年2009
卷号27期号:6页码:439-459
英文摘要

The Feiran-Solaf metamorphic complex of Sinai, Egypt, is one of the highest grade metamorphic complexes of a series of basement domes that crop out throughout the Arabian-Nubian Shield. In the Eastern Desert of Egypt these basement domes have been interpreted as metamorphic core complexes exhumed in extensional settings. For the Feiran-Solaf complex an interpretation of the exhumation mechanism is difficult to obtain with structural arguments as all of its margins are obliterated by post-tectonic granites. Here, metamorphic methods are used to investigate its tectonic history and show that the complex was characterized by a single metamorphic cycle experiencing peak metamorphism at similar to 700-750 degrees C and 7-8 kbar and subsequent isothermal decompression to similar to 4-5 kbar, followed by near isobaric cooling to 450 degrees C. Correlation of this metamorphic evolution with the deformation history shows that peak metamorphism occurred prior to the compressive deformation phase D(2), while the compressive D(2) and D(3) deformation occurred during the near isothermal decompression phase of the P-T loop. We interpret the concurrence of decompression of the P-T path and compression by structural shortening as evidence for the Najd fault system exhuming the complex in an oblique transpressive regime. However, final exhumation from similar to 15 km depth must have occurred due to an unrelated mechanism.


英文关键词deformation phases exhumation process Pan-African Orogeny P-T-D path thermodynamic modelling
类型Article
语种英语
国家Austria
收录类别SCI-E
WOS记录号WOS:000267704700003
WOS关键词ARABIAN-NUBIAN-SHIELD ; MINERAL EQUILIBRIA CALCULATIONS ; PRECAMBRIAN CRUSTAL EVOLUTION ; METAMORPHIC CORE COMPLEX ; EASTERN DESERT ; MIXING PROPERTIES ; SINAI PENINSULA ; SYSTEM K2O-FEO-MGO-AL2O3-SIO2-H2O-TIO2-FE2O3 ; METAPELITIC ASSEMBLAGES ; REACTION TEXTURES
WOS类目Geology
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/2XILL650/161688
作者单位Graz Univ, Inst Erdwissensch, A-8010 Graz, Austria
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Abu-Alam, T. S.,Stuewe, K.. Exhumation during oblique transpression: The Feiran-Solaf region, Egypt[J],2009,27(6):439-459.
APA Abu-Alam, T. S.,&Stuewe, K..(2009).Exhumation during oblique transpression: The Feiran-Solaf region, Egypt.JOURNAL OF METAMORPHIC GEOLOGY,27(6),439-459.
MLA Abu-Alam, T. S.,et al."Exhumation during oblique transpression: The Feiran-Solaf region, Egypt".JOURNAL OF METAMORPHIC GEOLOGY 27.6(2009):439-459.
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