干旱区生态环境知识资源中心(Arid): Geochronology and geochemistry of Neoproterozoic Hamamid metavolcanics hosting largest volcanogenic massive sulfide deposits in Eastern Desert of Egypt: Implications for petrogenesis and tectonic evolution

Arid

DOI	10.1016/j.precamres.2020.105751
	Geochronology and geochemistry of Neoproterozoic Hamamid metavolcanics hosting largest volcanogenic massive sulfide deposits in Eastern Desert of Egypt: Implications for petrogenesis and tectonic evolution
	Faisal, Mohamed; Yang, Xiaoyong; Khalifa, Ibrahim H.; Amuda, Abdulgafar K.; Sun, Chao
通讯作者	Yang, XY
来源期刊	PRECAMBRIAN RESEARCH
ISSN	0301-9268
EISSN	1872-7433
出版年	2020
卷号	344
英文摘要	The Gebel Abu Hamamid area forms the middle part of Shadli Metavolcanics Belt of the South Eastern Desert, which hosts the largest volcanogenic massive sulfide deposits in Egypt. The host-rock succession belongs to the Younger Hamamid Metavolcanics (YHM) group, consisting of mafic and felsic lavas with variable volcaniclastics. Although several studies have attempted to clarify the crustal evolution of the Neoproterozoic basement rocks of the South Eastern Desert, researchers have yet to develop a deep understanding of the petrogenesis, tectonic setting, and ages of these host rocks. In the current study, we newly report whole-rock geochemistry, mineral chemistry, and in-situ U-Pb zircon dating from basaltic to rhyolitic rocks of the YHM group to describe their magmatic evolution. Results indicate that the mafic rocks are characterized by tholeiitic affinity and arc-like geochemical signatures with significantly enriched large-ion lithophile elements and depleted high field strength elements. The parental magma was likely generated by partial melting (similar to 10-15%) of a spinel-lherzolite source mantle that was metasomatized by fluids from a former subduction event, followed by magma ascent under low pressure and low oxygen fugacity conditions. The felsic lavas (similar to 695 Ma) are characterized by subduction-related geochemical characteristics with significant enrichments in Zr, Hf, and Sm. They formed from lithosphere-derived magma enriched by melts from the ancient subducted slab, and later experienced an assimilation-fractional crystallization (AFC) process. The YHM group was formed under extensional geodynamic conditions (back-arc basin setting). The zircon grains display hydrothermal overgrowth at the rims, most likely due to regional metamorphic and hydrothermal changes. This characteristic is likely the effect of hydrothermal fluids associated with the Jurassic-Cretaceous tectonothermal event in the South Eastern Desert.
英文关键词	Shadli Metavolcanics Volcanogenic massive sulfide Eastern Desert Arabian-Nubian Shield Back-arc basin U-Pb zircon dating
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000536778900006
WOS关键词	TRACE-ELEMENT COMPOSITION ; U-PB ZIRCON ; PRECAMBRIAN CRUSTAL EVOLUTION ; VOLCANIC-ROCKS ; CLINOPYROXENE COMPOSITION ; ISOTOPIC CONSTRAINTS ; STATISTICAL-ANALYSIS ; HYDROTHERMAL ZIRCON ; GRANITOID GNEISSES ; AGE CONSTRAINTS
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/2XILL650/324582
作者单位	[Faisal, Mohamed; Yang, Xiaoyong; Amuda, Abdulgafar K.; Sun, Chao] Univ Sci & Technol China, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Peoples R China; [Faisal, Mohamed; Khalifa, Ibrahim H.] Suez Canal Univ, Fac Sci, Dept Geol, El Ismailia 41522, Egypt; [Amuda, Abdulgafar K.] Bayero Univ Kano, Dept Geol, Kano, Kano State, Nigeria
推荐引用方式 GB/T 7714	Faisal, Mohamed,Yang, Xiaoyong,Khalifa, Ibrahim H.,et al. Geochronology and geochemistry of Neoproterozoic Hamamid metavolcanics hosting largest volcanogenic massive sulfide deposits in Eastern Desert of Egypt: Implications for petrogenesis and tectonic evolution[J],2020,344.
APA	Faisal, Mohamed,Yang, Xiaoyong,Khalifa, Ibrahim H.,Amuda, Abdulgafar K.,&Sun, Chao.(2020).Geochronology and geochemistry of Neoproterozoic Hamamid metavolcanics hosting largest volcanogenic massive sulfide deposits in Eastern Desert of Egypt: Implications for petrogenesis and tectonic evolution.PRECAMBRIAN RESEARCH,344.
MLA	Faisal, Mohamed,et al."Geochronology and geochemistry of Neoproterozoic Hamamid metavolcanics hosting largest volcanogenic massive sulfide deposits in Eastern Desert of Egypt: Implications for petrogenesis and tectonic evolution".PRECAMBRIAN RESEARCH 344(2020).