干旱区生态环境知识资源中心(Arid): Tracking the transition from subduction-related to post-collisional magmatism in the north Arabian-Nubian Shield: A case study from the Homrit Waggat area of the Eastern Desert of Egypt

Arid

DOI	10.1002/gj.3643
	Tracking the transition from subduction-related to post-collisional magmatism in the north Arabian-Nubian Shield: A case study from the Homrit Waggat area of the Eastern Desert of Egypt
	Azer, Mokhles K.1; Abdelfadil, Khaled M.2; Asimow, Paul D.3; Khalil, Ahmed E.1
通讯作者	Azer, Mokhles K.
来源期刊	GEOLOGICAL JOURNAL
ISSN	0072-1050
EISSN	1099-1034
出版年	2020
卷号	55 期号:6 页码:4426-4452
英文摘要	Field and geochemical observations of the granitoids of the Homrit Waggat area in the central Eastern Desert of Egypt reveal two magmatic phases. The early phase of weakly deformed subduction-related calc-alkaline rocks includes tonalite and granodiorite. We name the later phase the Homrit Waggat Pluton (HWP); it includes undeformed syenogranite, alkali feldspar granite, and minor albitized granite. The tonalite and granodiorite have distinct negative Nb-Ta anomalies and lower alkalis, REE, Nb, Zr, and Hf than the HWP. The early magmatic pulse is a subduction-related suite, likely generated by underplating of mantle-derived magmas that triggered partial melting of mafic lower crust; mixing of these melts led to intermediate magma that further fractionated to tonalite and granodiorite. The HWP granites of the late magmatic pulse are transitional from a subduction-related to an anorogenic within-plate environment, plausibly generated by post-collisional lithosphere delamination. Although the parent magma of the HWP was I-type, extensive fractional crystallization produced residual liquids with A(2)-type character. Albitized granites are found only along the outer margin of the HWP, and contacts with the alkali feldspar granite are gradational, suggesting fluid interactions at a late stage of crystallization. The original textures of the albitized granites are preserved, but their bulk composition was modified by the production of Na-rich minerals and the removal of K, REE, and some trace elements by fluids.
英文关键词	albitization allanite Arabian-Nubian Shield delamination Eastern Desert post-collisional
类型	Article
语种	英语
国家	Egypt ; USA
收录类别	SCI-E
WOS记录号	WOS:000496889700001
WOS关键词	A-TYPE GRANITES ; CALC-ALKALINE ; CRUSTAL EVOLUTION ; SOUTHERN SINAI ; AFRICAN OROGEN ; TRACE-ELEMENT ; GEOCHEMICAL CHARACTERISTICS ; NEOPROTEROZOIC GRANITOIDS ; PETROGENESIS ; ORIGIN
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
EI主题词	2019-11-18
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310919
作者单位	1.Natl Res Ctr, Geol Sci Dept, Cairo 12622, Egypt; 2.Sohag Univ, Fac Sci, Geol Dept, Sohag, Egypt; 3.CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA
推荐引用方式 GB/T 7714	Azer, Mokhles K.,Abdelfadil, Khaled M.,Asimow, Paul D.,et al. Tracking the transition from subduction-related to post-collisional magmatism in the north Arabian-Nubian Shield: A case study from the Homrit Waggat area of the Eastern Desert of Egypt[J],2020,55(6):4426-4452.
APA	Azer, Mokhles K.,Abdelfadil, Khaled M.,Asimow, Paul D.,&Khalil, Ahmed E..(2020).Tracking the transition from subduction-related to post-collisional magmatism in the north Arabian-Nubian Shield: A case study from the Homrit Waggat area of the Eastern Desert of Egypt.GEOLOGICAL JOURNAL,55(6),4426-4452.
MLA	Azer, Mokhles K.,et al."Tracking the transition from subduction-related to post-collisional magmatism in the north Arabian-Nubian Shield: A case study from the Homrit Waggat area of the Eastern Desert of Egypt".GEOLOGICAL JOURNAL 55.6(2020):4426-4452.