干旱区生态环境知识资源中心(Arid): Volcanogenic talc-copper deposits of Darhib-Abu Jurdi area, Egypt: Petrogenesis and remote sensing characterization

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DOI	10.1002/gj.3742
	Volcanogenic talc-copper deposits of Darhib-Abu Jurdi area, Egypt: Petrogenesis and remote sensing characterization
	Ali-Bik, Mohamed W.; Hassan, Safaa M.; Sadek, Mohamed F.
通讯作者	Ali-Bik, MW
来源期刊	GEOLOGICAL JOURNAL
ISSN	0072-1050
EISSN	1099-1034
出版年	2020
卷号	55 期号:7 页码:5330-5354
英文摘要	Economic talc deposits were developed as an integral part of a volcanogenic massive sulfide system in Darhib-Abu Jurdi bimodal-mafic type submarine volcanics in the South Eastern Desert of Egypt. These Pan-African metavolcanics were erupted in a rift-related environment and experienced low-grade greenschist metamorphism. They host talc-malachite mineralization, mainly within E-W trending alteration zones along the major latitudinal shear planes. These mineralized alteration zones contain economic talc deposits as well as averages of 1.7% Cu and 0.46% Zn; the maximum may exceed 11% Cu. Sentinel-2, ASTER, and Landsat-8 dataset in conjunction with a portable TerraSpec Halo mineral identifier device (ASD) were employed in detecting and mapping these mineralized alteration zones within the Darhib-Abu Jurdi metavolcanics. Petrography, mineralogy, and geochemistry of these deposits and host volcanics enabled to put constraints on their petrogenesis and evolution as a submarine hydrothermal vent system. Mineralogical characteristics of pervasive chloritization stringer zone, hypogene primary sulfide ore zone, and supergene oxidized zone are addressed and discussed. Talc deposits were formed at Darhib-Abu Jurdi area as the main gangue phase via (a) direct precipitation on seafloor by interaction of silica-saturated hydrothermal fluids with Mg-rich seawater, (b) precipitation with actinolite/tremolite at shallow depth beneath the sulfide ore lenses due to penetration of Mg-rich seawater into hydrothermal conduit, and (c) replacement of pre-existing tremolite, actinolite, chlorite, and septechlorite.
英文关键词	Darhib-Abu Jurdi metavolcanics petrogenesis remote sensing volcanogenic talc-copper deposits
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000544704000025
WOS关键词	CENTRAL EASTERN DESERT ; MASSIVE SULFIDE DEPOSITS ; ARABIAN-NUBIAN SHIELD ; HAMISANA SHEAR ZONE ; BASEMENT ROCKS ; ALTERED ROCKS ; ISLAND-ARC ; ORIGIN ; DISCRIMINATION ; CLASSIFICATION
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/2XILL650/324892
作者单位	[Ali-Bik, Mohamed W.] Natl Res Ctr, Dept Geol Sci, Cairo, Egypt; [Hassan, Safaa M.; Sadek, Mohamed F.] Natl Author Remote Sensing & Space Sci NARSS, Cairo, Egypt
推荐引用方式 GB/T 7714	Ali-Bik, Mohamed W.,Hassan, Safaa M.,Sadek, Mohamed F.. Volcanogenic talc-copper deposits of Darhib-Abu Jurdi area, Egypt: Petrogenesis and remote sensing characterization[J],2020,55(7):5330-5354.
APA	Ali-Bik, Mohamed W.,Hassan, Safaa M.,&Sadek, Mohamed F..(2020).Volcanogenic talc-copper deposits of Darhib-Abu Jurdi area, Egypt: Petrogenesis and remote sensing characterization.GEOLOGICAL JOURNAL,55(7),5330-5354.
MLA	Ali-Bik, Mohamed W.,et al."Volcanogenic talc-copper deposits of Darhib-Abu Jurdi area, Egypt: Petrogenesis and remote sensing characterization".GEOLOGICAL JOURNAL 55.7(2020):5330-5354.