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DOI | 10.1002/gj.3025 |
Petrography and geochemistry of the Lower Miocene Moghra sandstones, Qattara Depression, north Western Desert, Egypt | |
Tawfik, Hossam A.1,2; Salah, Mohamed K.3; Maejima, Wataru1; Armstrong-Altrin, John S.4; Abdel-Hameed, Abdel-Monem T.2; El Ghandour, Mai M.2 | |
通讯作者 | Tawfik, Hossam A. |
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:5页码:1938-1953 |
英文摘要 | The petrographic and geochemical compositions of the Lower Miocene Moghra siliciclastic sediments in the Qattara Depression, north Western Desert, were investigated to infer their provenance, tectonic setting, palaeoweathering conditions, and diagenetic history. The Moghra Formation (similar to 200 m thick) is dominated by sandstones intercalated with mudstone and carbonates. X-ray diffraction analysis revealed that smectite, kaolinite, and illite are the dominant clay minerals found in mudstones. The sandstones are mainly subarkose, sublitharenite, and quartzarenite types with an average modal composition of Q(89)F(6)L(5). The sandstones possess various diagenetic overprints including mechanical infiltration of clay, compaction, cementation, dissolution, and replacement. Major and trace element concentrations suggested that the parent rocks are intermediate to felsic in composition derived from the Neoproterozoic Arabian Nubian Shield. The weathering indices such as the chemical index of alteration and the plagioclase index of alteration implied that the intensity of chemical weathering in the source area was moderate under semi-arid climatic conditions. On the other hand, the index of chemical variability indicates a low compositional maturity. The tectonic discrimination diagrams demonstrated a collision setting for the Arabian Nubian Shield, which represents the main supplier of sediments to the study area. Statistical parameters, sedimentary structures, and ichnofossil contents suggested that the Moghra sediments were deposited in a tidally-influenced fluvial environment. |
英文关键词 | diagenetic evolution Miocene Moghra Formation palaeoweathering provenance Qattara Depression |
类型 | Article |
语种 | 英语 |
国家 | Japan ; Egypt ; Lebanon ; Mexico |
收录类别 | SCI-E |
WOS记录号 | WOS:000443563400020 |
WOS关键词 | GULF-OF-MEXICO ; SEQUENCE STRATIGRAPHIC FRAMEWORK ; PETROHAN TERRIGENOUS GROUP ; SEDIMENTARY-ROCKS ; DIAGENETIC ALTERATIONS ; CHEMICAL-COMPOSITION ; KAHAR FORMATION ; SOUTHERN INDIA ; NW BULGARIA ; PROVENANCE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
来源机构 | Universidad Nacional Autónoma de México |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/209622 |
作者单位 | 1.Osaka City Univ, Grad Sch Sci, Dept Geosci, Osaka 5588585, Japan; 2.Tanta Univ, Fac Sci, Dept Geol, Tanta, Egypt; 3.Amer Univ Beirut, Dept Geol, Beirut, Lebanon; 4.Univ Nacl Autonoma Mexico, Inst Ciencias del Mar & Limnol, Unidad Proc Ocean & Costeros, Cdmx, Mexico |
推荐引用方式 GB/T 7714 | Tawfik, Hossam A.,Salah, Mohamed K.,Maejima, Wataru,et al. Petrography and geochemistry of the Lower Miocene Moghra sandstones, Qattara Depression, north Western Desert, Egypt[J]. Universidad Nacional Autónoma de México,2018,53(5):1938-1953. |
APA | Tawfik, Hossam A.,Salah, Mohamed K.,Maejima, Wataru,Armstrong-Altrin, John S.,Abdel-Hameed, Abdel-Monem T.,&El Ghandour, Mai M..(2018).Petrography and geochemistry of the Lower Miocene Moghra sandstones, Qattara Depression, north Western Desert, Egypt.GEOLOGICAL JOURNAL,53(5),1938-1953. |
MLA | Tawfik, Hossam A.,et al."Petrography and geochemistry of the Lower Miocene Moghra sandstones, Qattara Depression, north Western Desert, Egypt".GEOLOGICAL JOURNAL 53.5(2018):1938-1953. |
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