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DOI	10.1016/j.ejrs.2011.11.004
	Geology, geochemistry and tectonic setting of Pan-African serpentinites of Um Salim-Um Salatit area, Central Eastern Desert, Egypt
	Salem, A. K. A.; Khalil, A. E.; Ramadan, T. M.
通讯作者	Ramadan, TM
来源期刊	EGYPTIAN JOURNAL OF REMOTE SENSING AND SPACE SCIENCES
ISSN	1110-9823
EISSN	2090-2476
出版年	2012
卷号	15 期号:2 页码:171-184
英文摘要	This research aims at integrating remote sensing data and field studies for lithological mapping of different rock units. Geological interpretation of Landsat ETM+ image and field studies revealed that the study area is mainly covered by ophiolitic ultramafic rocks, ophiolitic metgabbros, schistose metavolocanics and alkaline granites. The serpentinites masses occur in the form of dipping or steeply inclined sheets or lenses generally emplaced along thrust faults. They are elongated in a ENE-WSW direction. They are composed essentially of antigorite, clinochrysotile and lizardite with subordinate amount of magnesite, chromite, magnetite, talc and chlorite. Geochemically, the studied serpentinites are rich in MgO, Cr, Ni and high Ni/Co ratio. The examined serpentinites belong to the ultramafic cumulate ophiolite rocks and it was originally a harzburgite that represents a fragment of the oceanic lithosphere formed in a back arc basin, i.e., they belong to an ophiolitic mantle sequence which was formed above subduction zone (SSZ). Several mineral deposits are associated with the ophiolitic ultramafic rocks such as magnesite, talc and chromite. Chromite lenses are mainly encountered at wadi level in a podiform shape. Microprobe analyses of chromite show that the chromite is an aluminum chromite type. The podiform chromite is characterized by low TiO2 (< 0.3%) and MnO (< 0.27% contents) which are considered as distinct feature of Alpine type chromite deposits. The presence of podiform chromites in the serpentinites are related typically to supra subduction zone ophiolites (SSZ). The studied serpentinites show similarities to the Alpine type serpentinites. (C) 2011 National Authority for Remote Sensing and Space Sciences. Production and hosting by Elsevier B.V. All rights reserved.
英文关键词	Tectonic setting Pan-African Serpentinites Podiform chromite Subduction zone Ultramafic cumulate
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	ESCI
WOS记录号	WOS:000216582200007
WOS类目	Environmental Sciences ; Remote Sensing
WOS研究方向	Environmental Sciences & Ecology ; Remote Sensing
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/330021
作者单位	[Salem, A. K. A.; Khalil, A. E.] Natl Res Ctr, Dept Geol Sci, Cairo, Egypt; [Ramadan, T. M.] Natl Author Remote Sensing & Space Sci, Cairo, Egypt
推荐引用方式 GB/T 7714	Salem, A. K. A.,Khalil, A. E.,Ramadan, T. M.. Geology, geochemistry and tectonic setting of Pan-African serpentinites of Um Salim-Um Salatit area, Central Eastern Desert, Egypt[J],2012,15(2):171-184.
APA	Salem, A. K. A.,Khalil, A. E.,&Ramadan, T. M..(2012).Geology, geochemistry and tectonic setting of Pan-African serpentinites of Um Salim-Um Salatit area, Central Eastern Desert, Egypt.EGYPTIAN JOURNAL OF REMOTE SENSING AND SPACE SCIENCES,15(2),171-184.
MLA	Salem, A. K. A.,et al."Geology, geochemistry and tectonic setting of Pan-African serpentinites of Um Salim-Um Salatit area, Central Eastern Desert, Egypt".EGYPTIAN JOURNAL OF REMOTE SENSING AND SPACE SCIENCES 15.2(2012):171-184.