干旱区生态环境知识资源中心(Arid): Geochemical characterization of altered rocks and element dispersion around an abandoned mining site in an arid zone: A case study of Fatira gold mine area, Eastern Desert, Egypt

Arid

DOI	10.1016/j.jafrearsci.2022.104827
	Geochemical characterization of altered rocks and element dispersion around an abandoned mining site in an arid zone: A case study of Fatira gold mine area, Eastern Desert, Egypt
	Redwan, Mostafa; Rammlmair, Dieter; Asran, Asran M.
通讯作者	Redwan, M
来源期刊	JOURNAL OF AFRICAN EARTH SCIENCES
ISSN	1464-343X
EISSN	1879-1956
出版年	2023
卷号	199
英文摘要	Environmental impacts related to mining are widespread due to poor waste management. Fatira abandoned gold mine area in Egypt was studied for the geochemical/mineralogical properties of alterations haloes, mine tailings, stream sediments under dry conditions and impacts to nearby environment. Results of this study indicated that stream sediments and soil-tailings mixture were derived from felsic sources, while tailings, weathered and old tailings were obtained from intermediate-felsic sources. The Pb load was much higher in weathered rocks, soil -tailings mixture and old tailings, while metals like As, Co, Cr, Cu, Ni, V, and Zn show elevated values in weathered rocks nearby Fatira mine area and in downstream sediments. The tailings have high average con-centrations of heavy elements, Sr (439), Zn (389), Cu (310), and Cr (50) (in mg/kg), higher than the toxicological standard values for contaminants indicating adverse effects to the neighbouring environment, whereas, soil -tailings mixture have higher As (263), Pb (56) and Al2O3 (17 wt%) reflecting the metavolcanics and granite composition of country rocks. At lower depths of tailings, escalated concentrations of Al2O3, K2O, Na2O, and Fe2O3, and little CaO, MgO, As, Pb, Zn, Cu, and Ni are indicate variable input from intermediate rocks, grey granites, felsite dykes and pink granites. Chemically altered granites showed replacement of hornblende into actinolite, calcite, pitted ilmenite and in-situ formation of Fe-oxides/hydroxides. Low hydraulic conductivity of the rocks increased the intensity of weathering. Gypsum and goethite are recorded due to repetitive sulfides decomposition. The element enrichment that exceeds the standard toxicological values in tailings, soil-tailings mixture, weathered rocks and stream sediments have severe effects on health. Integrating the chemistry, mineralogy and microtextural analyses in the study area is required for accurate geoenvironmental forecasting that facilitate mine rehabilitation with an effective management plan.
英文关键词	Geochemistry Mineralogy Tailings Alterations haloes Geoenvironmental impacts Fatira gold mine Egypt
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000922144100001
WOS关键词	HYDROTHERMAL ALTERATION ; SEMIARID ENVIRONMENT ; VOLCANIC-ROCKS ; PROVENANCE ; SEDIMENTS ; DEPOSIT ; SHALES ; DISTRIBUTIONS ; EVOLUTION ; DISTRICT
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/2XILL650/397100
推荐引用方式 GB/T 7714	Redwan, Mostafa,Rammlmair, Dieter,Asran, Asran M.. Geochemical characterization of altered rocks and element dispersion around an abandoned mining site in an arid zone: A case study of Fatira gold mine area, Eastern Desert, Egypt[J],2023,199.
APA	Redwan, Mostafa,Rammlmair, Dieter,&Asran, Asran M..(2023).Geochemical characterization of altered rocks and element dispersion around an abandoned mining site in an arid zone: A case study of Fatira gold mine area, Eastern Desert, Egypt.JOURNAL OF AFRICAN EARTH SCIENCES,199.
MLA	Redwan, Mostafa,et al."Geochemical characterization of altered rocks and element dispersion around an abandoned mining site in an arid zone: A case study of Fatira gold mine area, Eastern Desert, Egypt".JOURNAL OF AFRICAN EARTH SCIENCES 199(2023).