干旱区生态环境知识资源中心(Arid): The Atud gabbro-diorite complex: glimpse of the Cryogenian mixing, assimilation, storage and homogenization zone beneath the Eastern Desert of Egypt

Arid

DOI	10.1144/jgs2019-199
	The Atud gabbro-diorite complex: glimpse of the Cryogenian mixing, assimilation, storage and homogenization zone beneath the Eastern Desert of Egypt
	Stern, Robert J.; Ali, Kamal; Asimow, Paul D.; Azer, Mokhles K.; Leybourne, Matthew, I; Mubarak, Heba S.; Ren, Minghua; Romer, Rolf L.; Whitehouse, Martin J.
通讯作者	Stern, RJ
来源期刊	JOURNAL OF THE GEOLOGICAL SOCIETY
ISSN	0016-7649
EISSN	2041-479X
出版年	2020
卷号	177 期号:5 页码:965-980
英文摘要	We analysed gabbroic and dioritic rocks from the Atud igneous complex in the Eastern Desert of Egypt to understand better the formation of juvenile continental crust of the Arabian-Nubian Shield. Our results show that the rocks are the same age (U-Pb zircon ages of 694.5 +/- 2.1 Ma for two diorites and 695.3 +/- 3.4 Ma for one gabbronorite). These are partial melts of the mantle and related fractionates (epsilon Nd-690 = +4.2 to +7.3, Sr-87/Sr-86(i) = 0.70246-0.70268, zircon delta O-18 similar to +5 parts per thousand). Trace element patterns indicate that Atud magmas formed above a subduction zone as part of a large and long-lived (c. 60 myr) convergent margin. Atud complex igneous rocks belong to a larger metagabbro-epidiorite-diorite complex that formed as a deep crustal mush into which new pulses of mafic magma were periodically emplaced, incorporated and evolved. The petrological evolution can be explained by fractional crystallization of mafic magma plus variable plagioclase accumulation in a mid- to lower crustal MASH zone. The Atud igneous complex shows that mantle partial melting and fractional crystallization and plagioclase accumulation were important for Cryogenian crust formation in this part of the Arabian-Nubian Shield.
类型	Article
语种	英语
开放获取类型	Green Accepted
收录类别	SCI-E
WOS记录号	WOS:000567717000007
WOS关键词	NEOPROTEROZOIC EVOLUTION ; CRUSTAL EVOLUTION ; OXYGEN ; ZIRCON ; GEOCHEMISTRY ; XENOLITHS ; ISOTOPES ; OLIVINE ; MAGMAS ; JORDAN
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/2XILL650/326164
作者单位	[Stern, Robert J.] Univ Texas Dallas, Geosci Dept, Richardson, TX 75083 USA; [Ali, Kamal] United Arab Emirates Univ, Geol Dept, POB 15551, Abu Dhabi, U Arab Emirates; [Asimow, Paul D.] CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA; [Azer, Mokhles K.; Mubarak, Heba S.] Natl Res Ctr, Geol Sci Dept, Cairo, Egypt; [Leybourne, Matthew, I] Queens Univ, Dept Geol Sci & Geol Engn, Queens Facil Isotope Res, Kingston, ON K7L 3N6, Canada; [Ren, Minghua] Univ Nevada, Dept Geosci, Las Vegas, NV 89154 USA; [Romer, Rolf L.] GFZ German Res Ctr Geosci, D-14473 Potsdam, Germany; [Whitehouse, Martin J.] Swedish Museum Nat Hist, Dept Geosci, SE-10405 Stockholm, Sweden
推荐引用方式 GB/T 7714	Stern, Robert J.,Ali, Kamal,Asimow, Paul D.,et al. The Atud gabbro-diorite complex: glimpse of the Cryogenian mixing, assimilation, storage and homogenization zone beneath the Eastern Desert of Egypt[J],2020,177(5):965-980.
APA	Stern, Robert J..,Ali, Kamal.,Asimow, Paul D..,Azer, Mokhles K..,Leybourne, Matthew, I.,...&Whitehouse, Martin J..(2020).The Atud gabbro-diorite complex: glimpse of the Cryogenian mixing, assimilation, storage and homogenization zone beneath the Eastern Desert of Egypt.JOURNAL OF THE GEOLOGICAL SOCIETY,177(5),965-980.
MLA	Stern, Robert J.,et al."The Atud gabbro-diorite complex: glimpse of the Cryogenian mixing, assimilation, storage and homogenization zone beneath the Eastern Desert of Egypt".JOURNAL OF THE GEOLOGICAL SOCIETY 177.5(2020):965-980.