干旱区生态环境知识资源中心(Arid): Mineralization styles, alteration mineralogy, and sulfur isotope geochemistry of volcanogenic massive sulfide deposits in the Shadli Metavolcanics Belt, South Eastern Desert, Egypt: Metallogenic implications

Arid

DOI	10.1016/j.oregeorev.2021.104402
	Mineralization styles, alteration mineralogy, and sulfur isotope geochemistry of volcanogenic massive sulfide deposits in the Shadli Metavolcanics Belt, South Eastern Desert, Egypt: Metallogenic implications
	Faisal, Mohamed; Yang, Xiaoyong; Zhang, Huishan; Amuda, Abdulgafar K.; Sun, Chao; Mustafa, Sara; Gul, Muhammad A.
通讯作者	Yang, XY ; Zhang, HS (corresponding author)，Univ Sci & Technol China, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Peoples R China.
来源期刊	ORE GEOLOGY REVIEWS
ISSN	0169-1368
EISSN	1872-7360
出版年	2022
卷号	140
英文摘要	Three distinct occurrences of Zn-Cu-Pb mineralization (Um Samiuki, Hilgit, and Maaqal) in Neoproterozoic island arcs of the Shadli Metavolcanics Belt, South Eastern Desert, Egypt, have been investigated in this study. The Shadli Metavolcanics Belt erupted in two magmatic cycles, with the Older Um Samiuki Metavolcanics group getting overlain by the Younger Hamamid Metavolcanics (YHM) group. The YHM group is characterized by two distinct cycles of volcanism. The studied deposits are mainly hosted by volcanic and volcaniclastic rocks that belong to the first cycle of the YHM group. The host-rock succession was interpreted to have been formed by back-arc extensional volcanism and was then deformed and metamorphosed to the lower greenschist facies. The relationship between the mineral occurrences and host rocks remains poorly constrained and controversial. We report new field observations, paragenetic data, mineral chemistry analyses, and in situ sulfur isotopes to characterize the sulfide mineralization and to gain insights into its genesis. Two mineralization styles have been identified in these deposits. The first style in the Um Samiuki deposit is expressed by two massive mineralized bodies that are mostly stratiform. It is distinguished by sphalerite, chalcopyrite, pyrite, galena, and Ag-bearing minerals; followed by bornite and covellite in decreasing abundance. Less abundant supergene phases include secondary copper minerals and iron oxyhydroxides. The hydrothermal alteration is characterized by sericitization, chloritization, epidotization, and silicification. The second style represents disseminated and vein-type sulfides mainly encountered in Hilgit and Maaqal occurrences. It is characterized by pyrite with minor sphalerite and chalcopyrite. The 834SV-CDT values range from + 5.44 parts per thousand to + 9.08 parts per thousand with an average of + 8.11 parts per thousand +/- 1.1 parts per thousand (n = 18) for massive mineralized zones and from -2.25 parts per thousand to + 3.78 parts per thousand with an average of + 1.06 parts per thousand +/- 2.3 parts per thousand (n = 8) for disseminated and vein sulfides. Such a variation in the sulfur isotope signatures may imply that both mineralization styles were derived from the thermochemical sulfate reduction (TSR) of seawater and leaching of basement lithologies in varying quantities, consistent with Volcanogenic Massive Sulfide (VMS) deposits of back-arc basins. The negative 834SV-CDT values of some sulfides from the disseminated and vein mineralization may be seen as evidence for magmatic SO2 disproportionation. The studied VMS deposits display a close spatial and genetic association with submarine felsic volcanism of the YHM group, and their temporal distribution corresponds closely with the Mozambique Ocean closure stage of the Pan-African Orogeny.
英文关键词	Volcanogenic massive sulfide deposits Arabian-Nubian Shield, Shadli Metavolcanics Belt Um Samiuki Sulfur isotopes Alteration mineralogy
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000747638100001
WOS关键词	VOLCANIC-ROCKS ; BACK-ARC ; HYDROTHERMAL ALTERATION ; SULFATE REDUCTION ; GOLD DEPOSITS ; KERMADEC ARC ; ISLAND-ARC ; PB ISOTOPE ; CONSTRAINTS ; SR
WOS类目	Geology ; Mineralogy ; Mining & Mineral Processing
WOS研究方向	Geology ; Mineralogy ; Mining & Mineral Processing
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376881
作者单位	[Faisal, Mohamed; Yang, Xiaoyong; Zhang, Huishan; Amuda, Abdulgafar K.; Sun, Chao; Gul, Muhammad A.] Univ Sci & Technol China, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Peoples R China; [Faisal, Mohamed; Yang, Xiaoyong; Sun, Chao] Univ Sci & Technol China, CAS Ctr Excellence Comparat Planetol, Hefei 230026, Peoples R China; [Faisal, Mohamed] Suez Canal Univ, Dept Geol, Fac Sci, El Ismailia 41522, Egypt; [Zhang, Huishan] CGS, Xian Ctr Geol Survey, Xian 710054, Peoples R China; [Amuda, Abdulgafar K.] Bayero Univ Kano, Dept Geol, Kano 700241, Nigeria; [Mustafa, Sara] Suez Univ, Fac Petr & Min Engn, Suez 43521, Egypt
推荐引用方式 GB/T 7714	Faisal, Mohamed,Yang, Xiaoyong,Zhang, Huishan,et al. Mineralization styles, alteration mineralogy, and sulfur isotope geochemistry of volcanogenic massive sulfide deposits in the Shadli Metavolcanics Belt, South Eastern Desert, Egypt: Metallogenic implications[J],2022,140.
APA	Faisal, Mohamed.,Yang, Xiaoyong.,Zhang, Huishan.,Amuda, Abdulgafar K..,Sun, Chao.,...&Gul, Muhammad A..(2022).Mineralization styles, alteration mineralogy, and sulfur isotope geochemistry of volcanogenic massive sulfide deposits in the Shadli Metavolcanics Belt, South Eastern Desert, Egypt: Metallogenic implications.ORE GEOLOGY REVIEWS,140.
MLA	Faisal, Mohamed,et al."Mineralization styles, alteration mineralogy, and sulfur isotope geochemistry of volcanogenic massive sulfide deposits in the Shadli Metavolcanics Belt, South Eastern Desert, Egypt: Metallogenic implications".ORE GEOLOGY REVIEWS 140(2022).