干旱区生态环境知识资源中心(Arid): Discovery of spherulitic dahllite associated with carbonates at Hamadat phosphorite mine, Qusseir, Central Eastern Desert, Egypt

Arid

DOI	10.1007/s13146-020-00637-x
	Discovery of spherulitic dahllite associated with carbonates at Hamadat phosphorite mine, Qusseir, Central Eastern Desert, Egypt
	Abou El-Anwar, Esmat A.; Mekky, Hamed S.; Rahim, Said H. Abd El
通讯作者	Abou El-Anwar, EA
来源期刊	CARBONATES AND EVAPORITES
ISSN	0891-2556
EISSN	1878-5212
出版年	2020
卷号	35 期号:4
英文摘要	Microscopical and mineralogical studies reveal first recorded spherulitic dahllite (3Ca (3) (PO4)(2) Ca CO3) in the phosphorite rocks associated with carbonate rocks of Hamadat Mines (Duwi Formation) at Qusier area, Central Eastern Desert, Egypt. Mineralogically, the phosphatic rocks of Hamadat Mines are mainly consisting of fluor-apatite, dahllite, dolomite, calcite, quartz and pyrite. Petrographically, the studied dahllite in Hamadat Mines are authigenic in origin. Genetically, spherulitic dahllite at Hamadat Mines (Duwi Formation) in Qusier area is resulting from diagenesis processes; dolomitization and the re-crystallization process. Geochemical analysis of trace, rare earth elements and the petrogaphical is indicated that the phosphatic rocks are deposited under oxic to anoxic condition. Dolomitization process plays an important role in the concentration of trace and rare earth elements in the phosphatic rocks at Hamadat Mine. Dahllite layer has a relatively higher content in most of rare earth and some of the trace elements than those in the phosphate layer, which reveal that dahllite structure may be having the ability to scavenging them than the phosphatic construction. The chemical index of alteration (CIA), trace elements and La/Ce ratios pointed out that these phosphatic rocks were of hydrogenous origin deposited in cold and dry climate during low weathering. Finally, the hydroxial-apatite can be prepared to be used as a natural row material in the biological industry according to the chemical composition.
英文关键词	Dahllite Hamadat mines Trace elements Rare earth elements
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000578407800002
WOS关键词	BLACK SHALES ; GEOCHEMISTRY ; ORIGIN ; TRACE ; PETROGRAPHY ; PHOSPHATE ; ELEMENTS ; AREA
WOS类目	Geology
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/2XILL650/326790
作者单位	[Abou El-Anwar, Esmat A.; Mekky, Hamed S.; Rahim, Said H. Abd El] Natl Res Ctr, Geol Sci Dept, Giza, Egypt
推荐引用方式 GB/T 7714	Abou El-Anwar, Esmat A.,Mekky, Hamed S.,Rahim, Said H. Abd El. Discovery of spherulitic dahllite associated with carbonates at Hamadat phosphorite mine, Qusseir, Central Eastern Desert, Egypt[J],2020,35(4).
APA	Abou El-Anwar, Esmat A.,Mekky, Hamed S.,&Rahim, Said H. Abd El.(2020).Discovery of spherulitic dahllite associated with carbonates at Hamadat phosphorite mine, Qusseir, Central Eastern Desert, Egypt.CARBONATES AND EVAPORITES,35(4).
MLA	Abou El-Anwar, Esmat A.,et al."Discovery of spherulitic dahllite associated with carbonates at Hamadat phosphorite mine, Qusseir, Central Eastern Desert, Egypt".CARBONATES AND EVAPORITES 35.4(2020).