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DOI | 10.1002/gj.3094 |
Geochemical fingerprinting of Maastrichtian oil shales from the Central Eastern Desert, Egypt: Implications for provenance, tectonic setting, and source area weathering | |
Fathy, Douaa1,2; Wagreich, Michael1; Zaki, Rafat2; Mohamed, Ramadan S. A.2; Gier, Susanne1 | |
通讯作者 | Fathy, Douaa |
来源期刊 | GEOLOGICAL JOURNAL
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ISSN | 0072-1050 |
EISSN | 1099-1034 |
出版年 | 2018 |
卷号 | 53期号:6页码:2597-2612 |
英文摘要 | Upper Cretaceous oil shales accumulated in intracratonic sedimentary basins along the Central Eastern Desert. Comprehensive geochemical analyses have been applied on 3 Maastrichtian oil shale horizons from the Duwi and Dakhla formations (El-Beida and El-Nakheil mines). We provide significant clues for chemical weathering, sediment recycling, petrogenesis, and tectonic setting of oil shales’ source material. The mineralogical composition of the studied oil shales is generally characterized by carbonates, phyllosilicates, quartz, fluorapatite, and sulphides. The geochemistry is characterized by high Ca, P, Ni, U, and Cr values compared to standard post-Archean Australian shales (PAAS). Their chondrite-normalized patterns are distinguished by LREE enrichment, HREE depletion, negative Eu anomaly, and typical shale-like PAAS-normalized REE patterns. Furthermore, the total REE content is positively correlated with Si, K, Na, Fe, Al, Ti, and Mn, indicating that the REE of the investigated oil shales originated from terrigenous sources. Diverse proxies (e.g., CIA, CPA, and PIA) and the A-CN-K ternary diagram suppose that the source rock succession of the oil shales experienced moderate to intensive chemical weathering. Various geochemical parameters suggest that the oil shales were predominately derived from intermediate, with a minor contribution from felsic, igneous source rocks without any remarkable recycling signals. The average values of (Gd/Yb)(N) (1.39), Eu/Eu* (0.76), Th/U (0.29), and discrimination diagrams reveal that the oil shales were derived from Neoproterozoic island arc parent rocks. The geochemical results for oil shale provenance are in accordance with the composition and the palaeotectonic history of the igneous rocks in the Central Eastern Desert of Egypt. |
英文关键词 | chemical weathering Egypt Maastrichtian oil shale provenance recycling tectonic setting |
类型 | Article |
语种 | 英语 |
国家 | Austria ; Egypt |
收录类别 | SCI-E |
WOS记录号 | WOS:000450653800012 |
WOS关键词 | FINE-GRAINED SEDIMENTS ; ELEMENT GEOCHEMISTRY ; TRACE-ELEMENTS ; RARE-EARTH ; ROCKS ; BASIN ; SANDSTONES ; GRAYWACKES ; MUDSTONE ; PROVINCE |
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/2XILL650/209624 |
作者单位 | 1.Univ Vienna, Dept Geodynam & Sedimentol, Althanstr 14, A-1090 Vienna, Austria; 2.Menia Univ, Dept Geol, Al Minya, Egypt |
推荐引用方式 GB/T 7714 | Fathy, Douaa,Wagreich, Michael,Zaki, Rafat,et al. Geochemical fingerprinting of Maastrichtian oil shales from the Central Eastern Desert, Egypt: Implications for provenance, tectonic setting, and source area weathering[J],2018,53(6):2597-2612. |
APA | Fathy, Douaa,Wagreich, Michael,Zaki, Rafat,Mohamed, Ramadan S. A.,&Gier, Susanne.(2018).Geochemical fingerprinting of Maastrichtian oil shales from the Central Eastern Desert, Egypt: Implications for provenance, tectonic setting, and source area weathering.GEOLOGICAL JOURNAL,53(6),2597-2612. |
MLA | Fathy, Douaa,et al."Geochemical fingerprinting of Maastrichtian oil shales from the Central Eastern Desert, Egypt: Implications for provenance, tectonic setting, and source area weathering".GEOLOGICAL JOURNAL 53.6(2018):2597-2612. |
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