干旱区生态环境知识资源中心(Arid): U-Pb zircon geochronology and geochemical constraints on the Ediacaran continental arc and post-collision Granites of Wadi Hawashiya, North Eastern Desert, Egypt: Insights into the similar to 600 Ma crust-forming Event in the northernmost part of Arabian-Nubian Shield

Arid

DOI	10.1016/j.precamres.2020.105777
	U-Pb zircon geochronology and geochemical constraints on the Ediacaran continental arc and post-collision Granites of Wadi Hawashiya, North Eastern Desert, Egypt: Insights into the similar to 600 Ma crust-forming Event in the northernmost part of Arabian-Nubian Shield
	El-Bialy, M. Z.; Eliwa, H. A.; Mahdy, N. M.; Murata, M.; El-Gameel, K. H.; Sehsah, H.; Omar, M.; Kato, Y.; Fujinaga, K.; Andresen, A.; Thomsen, T. B.
通讯作者	El-Bialy, MZ
来源期刊	PRECAMBRIAN RESEARCH
ISSN	0301-9268
EISSN	1872-7433
出版年	2020
卷号	345
英文摘要	The Wadi Hawashiya, North Eastern Desert of Egypt, is a mountainous granitic terrain exposing two Ediacaran granitoid suites, namely the Hawashiya Older Granites (HOG) and the Hawashiya Younger Granites (HYG). The HOG comprise normal to high-K, calc-alkaline, metaluminous granitoids (mainly quartz diorites), while the HYG are strongly high-K, calc-alkaline, slighty peraluminous syeno- and monzogranites. Zr is strikingly high (ay. 335 ppm) in the HOG and is notably depleted (ay. 108 ppm) in the more evolved HYG. The HYG have very low Nb contents almost matching those of the HOG (Nb similar to 6 ppm), which is typical of I-type granites generated at arc-type settings. Although the REE patterns of the HOG and HYG are comparably LREE-enriched with moderately steep slopes, the patterns of the HYG have significant deep negative Eu anomalies of variable magnitudes, whereas those of the HOG usually exhibit very shallow negative and occasional positive Eu anomalies. The assessed apatite crystallization temperatures for both granitoid suites are higher than those estimated from the zircon and monazite thermometers indicating that apatite crystallized before zircon and monazite from the melt. HOG evolved by assimilation-fractional crystallization processes from mantle-derived magmas, which subsequently interacted with crustal sources during ascent and residence in higher crustal levels. Correlating the whole-rock composition of the HYG to melts generated by experimental dehydration melting of meta-sedimentary and magmatic rocks reveals that they appear to be derived by extended melting of psammitic and pelitic metasediments. The HYG were emplaced (586-601 Ma) after the collision between the juvenile crust of the Arabian-Nubian Shield (ANS) and the older pre-Neoproterozoic continental blocks of Saharan Metacraton. The emplacement of HOG (622-611 Ma) had occured earlier (ca. 10 Ma) in a normal mature continental arc. The geochemical signatures and age data suggest that the terminal collision between East and West Gondwanaland in the northern tip of the ANS occurred before similar to 620 Ma, most likely at similar to 630 Ma, and transitioned to an extensional setting at similar to 600 Ma.
英文关键词	Granitoids Arabian-Nubian Shield Petrogenesis Tectonic setting Whole-rock geochemistry U-Pb zircon geochronology
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000538145800002
WOS关键词	A-TYPE-GRANITOIDS ; MAFIC MICROGRANULAR ENCLAVES ; O ISOTOPIC COMPOSITIONS ; PAN-AFRICAN GRANITOIDS ; KATERINA RING COMPLEX ; K CALC-ALKALINE ; SLAB BREAK-OFF ; TRACE-ELEMENT ; SOUTHERN SINAI ; NEOPROTEROZOIC GRANITOIDS
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/2XILL650/324656
作者单位	[El-Bialy, M. Z.; Omar, M.] Port Said Univ, Fac Sci, Geol Dept, Port Said 42522, Egypt; [Eliwa, H. A.; El-Gameel, K. H.] Menoufia Univ, Fac Sci, Geol Dept, Shibin Al Kawm, Egypt; [Mahdy, N. M.] Nucl Mat Author, PO 530, Cairo, Egypt; [Murata, M.] Naruto Univ Educ, Fac Sci, Dept Geosci, Naruto, Tokushima 7728502, Japan; [Sehsah, H.] Damietta Univ, Fac Sci, Geol Dept, Dumyat 34517, Egypt; [Kato, Y.; Fujinaga, K.] Univ Tokyo, Sch Engn, Dept Geosyst Engn, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan; [Andresen, A.] Univ Oslo, Dept Geosci, Oslo, Norway; [Thomsen, T. B.] Geol Survey Denmark & Greenland, Dept Petrol & Econ Geol, Oster Voldgade 10, DK-1350 Copenhagen K, Denmark
推荐引用方式 GB/T 7714	El-Bialy, M. Z.,Eliwa, H. A.,Mahdy, N. M.,et al. U-Pb zircon geochronology and geochemical constraints on the Ediacaran continental arc and post-collision Granites of Wadi Hawashiya, North Eastern Desert, Egypt: Insights into the similar to 600 Ma crust-forming Event in the northernmost part of Arabian-Nubian Shield[J],2020,345.
APA	El-Bialy, M. Z..,Eliwa, H. A..,Mahdy, N. M..,Murata, M..,El-Gameel, K. H..,...&Thomsen, T. B..(2020).U-Pb zircon geochronology and geochemical constraints on the Ediacaran continental arc and post-collision Granites of Wadi Hawashiya, North Eastern Desert, Egypt: Insights into the similar to 600 Ma crust-forming Event in the northernmost part of Arabian-Nubian Shield.PRECAMBRIAN RESEARCH,345.
MLA	El-Bialy, M. Z.,et al."U-Pb zircon geochronology and geochemical constraints on the Ediacaran continental arc and post-collision Granites of Wadi Hawashiya, North Eastern Desert, Egypt: Insights into the similar to 600 Ma crust-forming Event in the northernmost part of Arabian-Nubian Shield".PRECAMBRIAN RESEARCH 345(2020).