干旱区生态环境知识资源中心(Arid): Mineralogy and geochemistry of fine-grained Dahab stream sediments, Southeastern Sinai, Egypt: emphasis on the intergrowths of Fe-Ti oxides

Arid

DOI	10.1007/s11631-021-00475-1
	Mineralogy and geochemistry of fine-grained Dahab stream sediments, Southeastern Sinai, Egypt: emphasis on the intergrowths of Fe-Ti oxides
	Surour, Adel A.; El-Kammar, Ahmed M. A.; Arafa, Ebtisam H.; Korany, Hala M.
通讯作者	Surour, AA (corresponding author), Galala Univ, Fac Sci, Petr & Min Geol, New Galala City 43511, Egypt. ; Surour, AA (corresponding author), Cairo Univ, Fac Sci, Dept Geol, Giza 12613, Egypt.
来源期刊	ACTA GEOCHIMICA
ISSN	2096-0956
EISSN	2365-7499
出版年	2021
英文摘要	Mineralogical and geochemical characteristics of stream sediments collected from 30 stations in the Dahab-Wadi Kid area (southeastern Sinai, Egypt) are presented. The studied sediments contain considerable amounts of heavy minerals, including abundant Fe-Ti oxides, with up to 25.94% index figure that measures the relative abundance of heavy minerals to light minerals. Immaturity of the sediments and nature of Fe-Ti oxide intergrowths, in addition to some non-opaque heavy minerals, indicate multiple provenances with contributions from a variety of Neoproterozoic mafic to felsic intrusions. Appreciable amounts of heavy minerals are derived from schists that belong to the so-called Wadi Kid volcano-sedimentary group. Owing to the considerable contribution of the felsic intrusions represented by within-plate granites, the sediments are enriched in REE-bearing minerals (e.g., monazite, cerianite, La-cerianite and allanite), V-bearing thorite, zircon, and a ZrO2 phase. The majority of Fe-Ti oxides are derived from the mafic intrusions, and they show evidence of pre-, syn- and post-depositional phases of alteration and formation of intergrowths. As to the geochemical signature of the bulk silt fraction, there is remarkable enrichment of LREEs with distinct negative Eu anomaly, and this supports dominance of a provenance dominated by felsic intrusions (i.e., the A-type within-plate granite and associated pegmatites). Also, the felsic provenance is responsible for slight abnormality of n-ary sumation U + Th content (up to similar to 37 ppm) and few anomalous samples bear uraniferous zircon and Ce-type monazite. The present paper sheds light on the fertility of the Dahab stream sediments in some economic minerals for possible future exploitation, not for gold only, but for potential REE-bearing minerals that are needed for a wide spectrum of modern technological industries.
英文关键词	Dahab stream sediments Silt fraction Fe-Ti oxides Textural variations Rees enrichment
类型	Article ; Early Access
语种	英语
收录类别	ESCI
WOS记录号	WOS:000652952300001
WOS关键词	A-TYPE GRANITES ; NORTHERN COAST ; EASTERN DESERT ; BLACK SANDS ; SOUTH SINAI ; GOLD ; PROVENANCE ; CHEMISTRY ; MAGNETITE ; ILMENITE
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/352994
作者单位	[Surour, Adel A.] Galala Univ, Fac Sci, Petr & Min Geol, New Galala City 43511, Egypt; [Surour, Adel A.; El-Kammar, Ahmed M. A.; Arafa, Ebtisam H.; Korany, Hala M.] Cairo Univ, Fac Sci, Dept Geol, Giza 12613, Egypt
推荐引用方式 GB/T 7714	Surour, Adel A.,El-Kammar, Ahmed M. A.,Arafa, Ebtisam H.,et al. Mineralogy and geochemistry of fine-grained Dahab stream sediments, Southeastern Sinai, Egypt: emphasis on the intergrowths of Fe-Ti oxides[J],2021.
APA	Surour, Adel A.,El-Kammar, Ahmed M. A.,Arafa, Ebtisam H.,&Korany, Hala M..(2021).Mineralogy and geochemistry of fine-grained Dahab stream sediments, Southeastern Sinai, Egypt: emphasis on the intergrowths of Fe-Ti oxides.ACTA GEOCHIMICA.
MLA	Surour, Adel A.,et al."Mineralogy and geochemistry of fine-grained Dahab stream sediments, Southeastern Sinai, Egypt: emphasis on the intergrowths of Fe-Ti oxides".ACTA GEOCHIMICA (2021).