干旱区生态环境知识资源中心(Arid): Geochemistry and paleoweathering of metasediments and pyrite-bearing quartzite during the Neoproterozoic Era, Wadi Ibib-Wadi Suwawrib, South Eastern Desert, Egypt

Arid

DOI	10.1007/s12517-021-09141-5
	Geochemistry and paleoweathering of metasediments and pyrite-bearing quartzite during the Neoproterozoic Era, Wadi Ibib-Wadi Suwawrib, South Eastern Desert, Egypt
	Saleh, Gehad M.; Khaleal, Farrage M.; Lasheen, El Saeed R.
通讯作者	Lasheen, ER (corresponding author), Al Azhar Univ, Fac Sci, Geol Dept, POB 11884, Cairo, Egypt.
来源期刊	ARABIAN JOURNAL OF GEOSCIENCES
ISSN	1866-7511
EISSN	1866-7538
出版年	2022
卷号	15 期号:1
英文摘要	This contribution focuses on new geological and geochemical investigations of Wadi Ibib (WI)-Wadi Suwawrib (WS) metasediments and pyrite-bearing quartzites to deduce the paleoweathering, paleoclimatology processes, sources, and provenances of their old sediments. Variable weathering indexes such as the chemical alteration index (CIA) and chemical index of weathering (CIW) as well as the plagioclase alteration index (PIA) reflect a mild-medium chemical-weathering effect. Furthermore, variation in climate increases the opportunity for chemical weathering. The studied metasediments are enriched in major (with expectation of SiO2), trace, and rare earth elements (REEs) relative to quartzite. The steep slope of LREEs is clear in the studied metasediments and quartzite (La/Sm av. = 1.8, 3.07, respectively) and weakly fractionated of HREEs for both (Gd/Yb av. = 1.3, 0.28, respectively). A strong negative Eu anomaly (Eu/Eu* = 0.1-0.4; 0.26 in average) was obviously recorded in the examined quartzite and shallower in metasediments (Eu/Eu= 0.2-0.9; 0.53). The latter contain Eu/Eu values akin to Egyptian metasediments, Proterozoic greywackes, Post-Archean Australian shale (PAAs), and upper continental crust (UCC). The SiO2/Al2O3 ratio ranges from 7.73 to 9.32 (av. 8.5) for quartzite, suggesting sedimentary maturation, while metasediments (3.28-4.59) are immature. Variable discrimination diagrams reveal that the WI-WS metasediments deposited in continental arc setting may be back-arc comparable with Egyptian metasediments, whereas the examined quartzite was developed in passive margin.
英文关键词	Metasediments Paleoweathering indexes Provenance Pyrite Quartzite Tectonic setting Wadi Ibib-Wadi Suwawrib
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000734771100008
WOS关键词	TRACE-ELEMENT ANALYSIS ; SEDIMENTARY-ROCKS ; CRUSTAL EVOLUTION ; GOLD DEPOSIT ; CORE COMPLEX ; ISOTOPIC COMPOSITIONS ; SILICICLASTIC ROCKS ; METAMORPHIC COMPLEX ; TECTONIC EVOLUTION ; CHINA IMPLICATIONS
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/2XILL650/374372
作者单位	[Saleh, Gehad M.; Khaleal, Farrage M.] Nucl Mat Author, POB 530 El Maadi, Cairo, Egypt; [Lasheen, El Saeed R.] Al Azhar Univ, Fac Sci, Geol Dept, POB 11884, Cairo, Egypt
推荐引用方式 GB/T 7714	Saleh, Gehad M.,Khaleal, Farrage M.,Lasheen, El Saeed R.. Geochemistry and paleoweathering of metasediments and pyrite-bearing quartzite during the Neoproterozoic Era, Wadi Ibib-Wadi Suwawrib, South Eastern Desert, Egypt[J],2022,15(1).
APA	Saleh, Gehad M.,Khaleal, Farrage M.,&Lasheen, El Saeed R..(2022).Geochemistry and paleoweathering of metasediments and pyrite-bearing quartzite during the Neoproterozoic Era, Wadi Ibib-Wadi Suwawrib, South Eastern Desert, Egypt.ARABIAN JOURNAL OF GEOSCIENCES,15(1).
MLA	Saleh, Gehad M.,et al."Geochemistry and paleoweathering of metasediments and pyrite-bearing quartzite during the Neoproterozoic Era, Wadi Ibib-Wadi Suwawrib, South Eastern Desert, Egypt".ARABIAN JOURNAL OF GEOSCIENCES 15.1(2022).