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DOI | 10.1007/s12517-014-1407-x |
Ultramafic rocks in Gabal El-Rubshi, Central Eastern Desert, Egypt: petrography, mineral chemistry, and geochemistry constraints | |
El-Desoky, Hatem M.1; Khalil, Ahmed E.2; Salem, Abdel Karim A.2 | |
通讯作者 | Khalil, Ahmed E. |
来源期刊 | ARABIAN JOURNAL OF GEOSCIENCES
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ISSN | 1866-7511 |
EISSN | 1866-7538 |
出版年 | 2015 |
卷号 | 8期号:5页码:2607-2631 |
英文摘要 | Petrographic, mineral chemistry, and geochemical studies of the ultramafic rocks from the El-Rubshi range, the main ophiolitic outcrop of the Neoproterozoic (Cryogenian) Complex in Central Eastern Desert of Egypt, provide new petrogenetic data evidence on the nature of the fluids that interacted with an original mantle peridotite. Certain primary features and chemical parameters are maintained even after their multistage histories of alteration, deformation, strain, and metamorphism. Chemo-metamorphic conditions and textures of the studied serpentinites and amphibolites show the principal events of recrystallization and metasomatism, but the diagnostic phases associated with the high pressure events related to subduction were erased. The occurrences of chrome spinels are relatively abundant in the oceanic domain ophiolites. The ophiolitic (serpentinite and amphibolite) rocks show extensive alteration, including hydration, carbonization, and serpentinization of the ultramafic rocks and amphibolization and chloritization of the basic rocks. Like arc-related rocks, the Ti contents of oceanic ophiolites are low in most samples but slightly higher in a few. Mantle heterogeneities may have caused the components with diverse geochemical signatures that are indicative of tholeiitic-komatiitic rocks, mid-ocean ridge basalts, and the enriched rocks of the oceanic islands or seamounts. Normalized trace element patterns of the studied serpentinite and amphibolite samples are characteristic of peridotites from both supra-subduction (SSZ) and mid-ocean ridge (MOR) zones. The pyroxenites are magmatic intruded within the El-Rubshi serpentinites and amphibolites, tholeiitic magma, and within-plate tholeiite environment. |
英文关键词 | Serpentinite Amphibolite Pyroxenite Ophiolite Petrography Geochemistry Mineral chemistry |
类型 | Article |
语种 | 英语 |
国家 | Egypt |
收录类别 | SCI-E |
WOS记录号 | WOS:000354609000016 |
WOS关键词 | MID-ATLANTIC RIDGE ; PODIFORM CHROMITITE ; ISLANDS OPHIOLITE ; MANTLE SECTION ; ARC MANTLE ; CR-SPINEL ; ORIGIN ; CLASSIFICATION ; METAMORPHISM ; SERPENTINITES |
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/2XILL650/185886 |
作者单位 | 1.Al Azhar Univ, Dept Geol, Fac Sci, Cairo, Egypt; 2.Natl Res Ctr, Dept Geol, Cairo, Egypt |
推荐引用方式 GB/T 7714 | El-Desoky, Hatem M.,Khalil, Ahmed E.,Salem, Abdel Karim A.. Ultramafic rocks in Gabal El-Rubshi, Central Eastern Desert, Egypt: petrography, mineral chemistry, and geochemistry constraints[J],2015,8(5):2607-2631. |
APA | El-Desoky, Hatem M.,Khalil, Ahmed E.,&Salem, Abdel Karim A..(2015).Ultramafic rocks in Gabal El-Rubshi, Central Eastern Desert, Egypt: petrography, mineral chemistry, and geochemistry constraints.ARABIAN JOURNAL OF GEOSCIENCES,8(5),2607-2631. |
MLA | El-Desoky, Hatem M.,et al."Ultramafic rocks in Gabal El-Rubshi, Central Eastern Desert, Egypt: petrography, mineral chemistry, and geochemistry constraints".ARABIAN JOURNAL OF GEOSCIENCES 8.5(2015):2607-2631. |
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