干旱区生态环境知识资源中心(Arid): Geochemistry and petrogenesis of I-type granitoid rocks around Nasb-Zurar intrusion, West Wadi Allaqi, South Eastern Desert, Egypt

Arid

DOI	10.1007/s12517-021-06913-x
	Geochemistry and petrogenesis of I-type granitoid rocks around Nasb-Zurar intrusion, West Wadi Allaqi, South Eastern Desert, Egypt
	Emam, Ashraf; Radwan, Abdelhady
通讯作者	Radwan, A (corresponding author), Aswan Univ, Fac Sci, Dept Geol, PO 81528,Airport Rd, Sahary City, Aswan, Egypt.
来源期刊	ARABIAN JOURNAL OF GEOSCIENCES
ISSN	1866-7511
EISSN	1866-7538
出版年	2021
卷号	14 期号:7
英文摘要	Granitic rocks surrounding Nasb-Zurar intrusion at North West Wadi Allaqi comprise two varieties: tonalite and granodiorite of older granite (OG), and monzogranite of younger affinity (YG). Plagioclase crystals in OG are generally zoned and range in composition from andesite to oligioclase with An (21.0-46.4), Ab (52.9-78.1), and Or (0.7-1.1); meanwhile, they have albite composition in YG with Ab (87.4-93.3). Alkali feldspars are perthitic microcline and orthoclase. Muscovite has phengite composition with Si:Al-iv, being greater than 3:1. Biotite varies between Al-poor biotite end-members annite and phlogopite. Chlorite in OG has ripidolite composition, while that from YG is brunsvigite. The OG granite has SiO2 wt.% of 67.7 to 71.9, with high Al2O3 wt.% of 12.9 to 16.2 and low TiO2 wt.% of 0.26 to 0.52, MgO wt.% of 0.47 to 2.07, Fe2O3 wt.% of 1.91 to 4.5, P2O5 wt.% of 0.05 to 0.13, CaO wt.% of 2.01 to 3.92, K2O wt.% of 0.36 to 3.63, and Na2O wt.% of 3.63 to 5.64. YG is rich in SiO2 wt.% (73 to 75), and Al2O3 wt.% ranges 13.3-14.4, K2O wt.% elevated between 3.7 and 4.6, CaO wt.% ranges 0.18-1.59, and Na2O wt.% is high (3.52-4.18), while TiO2, Fe2O3, and MgO wt.% contents show relatively lower values. All studied granites have peraluminous characters and evolve as I-type granites within volcanic arc environment. The OG are believed to form by melting of metagreywackes surrounding the area at about 680 degrees C; meanwhile, the YG is supposed to crystallize under relatively lower temperature (average similar to 630 C degrees) by re-melting and differentiation of OG.
英文关键词	Nasb-Zurar West Wadi Allaqi Abu Marwa granites
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000632938300003
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/2XILL650/349560
作者单位	[Emam, Ashraf; Radwan, Abdelhady] Aswan Univ, Fac Sci, Dept Geol, PO 81528,Airport Rd, Sahary City, Aswan, Egypt
推荐引用方式 GB/T 7714	Emam, Ashraf,Radwan, Abdelhady. Geochemistry and petrogenesis of I-type granitoid rocks around Nasb-Zurar intrusion, West Wadi Allaqi, South Eastern Desert, Egypt[J],2021,14(7).
APA	Emam, Ashraf,&Radwan, Abdelhady.(2021).Geochemistry and petrogenesis of I-type granitoid rocks around Nasb-Zurar intrusion, West Wadi Allaqi, South Eastern Desert, Egypt.ARABIAN JOURNAL OF GEOSCIENCES,14(7).
MLA	Emam, Ashraf,et al."Geochemistry and petrogenesis of I-type granitoid rocks around Nasb-Zurar intrusion, West Wadi Allaqi, South Eastern Desert, Egypt".ARABIAN JOURNAL OF GEOSCIENCES 14.7(2021).