Arid
DOI10.1007/s12517-017-2891-6
Ore minerals and geochemical characterization of the Dungash gold deposit, South Eastern Desert, Egypt
Dourgham, Islam A.1; Fawzy, Khairiya M.2; Frimmel, Hartwig E.3
通讯作者Fawzy, Khairiya M.
来源期刊ARABIAN JOURNAL OF GEOSCIENCES
ISSN1866-7511
EISSN1866-7538
出版年2017
卷号10期号:6
英文摘要

The Dungash historic gold mine is located in the South Eastern Desert of Egypt. The gold-bearing quartz veins are hosted by the metavolcanic and metavolcaniclastic rocks along an ENE-WSW trending shear zone. Alteration types recorded in the wall rocks are sericitization, silicification, carbonatization, chloritization, sulfidization, ferruginization, and listwanitization. The ore mineral assemblage comprises arsenopyrite, pyrite, native gold, pyrrhotite, sphalerite, chalcopyrite, and galena. The primary sulfide mineral assemblage formed during a hypogene hydrothermal stage whereas anglesite and goethite occur as secondary supergene phases. Microthermometric fluid inclusion analysis revealed that the auriferous quartz precipitated from a moderately saline (5 to 11.22 wt% NaClequiv) solution at temperatures above the recorded homogenization temperatures (T-h), which range from 380 to 177 degrees C. The minimum pressures of trapping are between 350 and 400 bars. The fluid evolution during mineralization is explained by mixing of a magmatic fluid with meteoric waters. Initially, the high temperature and moderately saline magmatic fluid dominated and progressively became diluted with meteoric waters. Highest gold content is recorded in the carbonatized zone and the quartz veins. However, gold content in the carbonatized zone of the footwall exceeds several times its content in the quartz veins and the carbonatized zone of the hanging wall.


英文关键词Dungash gold mineralization Ore minerals Fluid inclusions Eastern Desert Egypt
类型Article
语种英语
国家Egypt ; Germany
收录类别SCI-E
WOS记录号WOS:000396895200020
WOS关键词FLUID INCLUSIONS ; MINERALIZATION ; EQUILIBRIA ; SILVER ; AREA
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/2XILL650/197466
作者单位1.Al Azhar Univ, Fac Sci, Dept Geol, Cairo, Egypt;
2.Aswan Univ, Fac Sci, Dept Geol, Aswan, Egypt;
3.Univ Wurzburg, Inst Geog & Geol, Geodynam & Geomat Res Div, D-97074 Wurzburg, Germany
推荐引用方式
GB/T 7714
Dourgham, Islam A.,Fawzy, Khairiya M.,Frimmel, Hartwig E.. Ore minerals and geochemical characterization of the Dungash gold deposit, South Eastern Desert, Egypt[J],2017,10(6).
APA Dourgham, Islam A.,Fawzy, Khairiya M.,&Frimmel, Hartwig E..(2017).Ore minerals and geochemical characterization of the Dungash gold deposit, South Eastern Desert, Egypt.ARABIAN JOURNAL OF GEOSCIENCES,10(6).
MLA Dourgham, Islam A.,et al."Ore minerals and geochemical characterization of the Dungash gold deposit, South Eastern Desert, Egypt".ARABIAN JOURNAL OF GEOSCIENCES 10.6(2017).
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