干旱区生态环境知识资源中心(Arid): Neoproterozoic concentric intrusive complex of gabbro-diorite-tonalite-granodiorite association, Rahaba area, southern Eastern Desert of Egypt: Implications for magma mixing of arc intrusive rocks

Arid

DOI	10.1016/j.lithos.2021.106423
	Neoproterozoic concentric intrusive complex of gabbro-diorite-tonalite-granodiorite association, Rahaba area, southern Eastern Desert of Egypt: Implications for magma mixing of arc intrusive rocks
	Abdel-Karim, Abdel-Aal M.; Azer, Mokhles K.; Mogahed, Moustafa M.
通讯作者	Mogahed, MM (corresponding author), Benha Univ, Fac Sci, Geol Dept, POB 13518, Banha, Egypt.
来源期刊	LITHOS
ISSN	0024-4937
EISSN	1872-6143
出版年	2021
卷号	404
英文摘要	We present results from a detailed study of a representative suite of Neoproterozoic concentric intrusive complex, Rahaba intrusive complex (RIC), in the south Eastern Desert of Egypt. It intrudes the island arc volcano sedimentary successions and serpentinized ultramafic rocks. The RIC is made up of several consanguineous rock types with gradational contacts suggesting that they are genetically related. It is a composite intrusive complex consisting of a mafic core (gabbro and diorite) surrounded by tonalite in the middle to granodiorite at the margin. Abundant of mafic microgranular enclaves (MMEs) are observed within tonalite and granodiorite. The chemical composition of the mafic minerals indicated that they are primary minerals and crystallized from calc-alkaline mafic magma. Geochemically, the gabbroic rocks characterized by low concentrations of alkali contents and high Mg# (40.42 to 58.05) values with enriched contents of large ion lithophile elements (LILEs; Ba, K, Pb, and Sr) and light rare earth elements (LREEs) and depleted in high field strength elements (HFSEs; Nb, Ta, P, Zr, and Hf), reflect their derivation from mafic melt. The tonalite and granodiorite are calc-alkaline, metaluminous and have similar characterization of their LILEs, REEs and HFSEs, suggest their development from the same source magma. The diorites and MMEs are characterized by intermediate compositions between gabbroic and tonalitic rocks, however they have trace element signatures tend to be analogous to those of tonalites. The integrated petrological and geochemical features of the different rock types of the RIC suggest emplacement in an active continental margin setting. The gabbroic rocks originated from hydrous partial melting of a depleted-mantle wedge, metasomatized by aqueous fluids released from the subducted oceanic slab, whereas the diorites and MMEs as well as tonalites were generated due to the mixing of mafic magma related to gabbroic rocks and granodioritic magma.
英文关键词	Rahaba intrusive complex Gabbro-diorite-tonalite-granodiorite Island arc complex Magma mixing Eastern Desert Egypt
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000702763800001
WOS关键词	GREAT XINGAN RANGE ; CALC-ALKALINE ; OXYGEN FUGACITY ; ARCHEAN TRONDHJEMITES ; MEDIUM-PRESSURE ; NE CHINA ; DISCRIMINATION ; MANTLE ; HORNBLENDE ; EVOLUTION
WOS类目	Geochemistry & Geophysics ; Mineralogy
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364129
作者单位	[Abdel-Karim, Abdel-Aal M.] Zagazig Univ, Fac Sci, Geol Dept, Zagazig, Egypt; [Azer, Mokhles K.] Natl Res Ctr, Geol Sci Dept, Cairo, Egypt; [Mogahed, Moustafa M.] Benha Univ, Fac Sci, Geol Dept, POB 13518, Banha, Egypt
推荐引用方式 GB/T 7714	Abdel-Karim, Abdel-Aal M.,Azer, Mokhles K.,Mogahed, Moustafa M.. Neoproterozoic concentric intrusive complex of gabbro-diorite-tonalite-granodiorite association, Rahaba area, southern Eastern Desert of Egypt: Implications for magma mixing of arc intrusive rocks[J],2021,404.
APA	Abdel-Karim, Abdel-Aal M.,Azer, Mokhles K.,&Mogahed, Moustafa M..(2021).Neoproterozoic concentric intrusive complex of gabbro-diorite-tonalite-granodiorite association, Rahaba area, southern Eastern Desert of Egypt: Implications for magma mixing of arc intrusive rocks.LITHOS,404.
MLA	Abdel-Karim, Abdel-Aal M.,et al."Neoproterozoic concentric intrusive complex of gabbro-diorite-tonalite-granodiorite association, Rahaba area, southern Eastern Desert of Egypt: Implications for magma mixing of arc intrusive rocks".LITHOS 404(2021).