Arid
DOI10.1016/j.jafrearsci.2016.04.016
Nummulite biostratigraphy of the Eocene succession in the Bahariya Depression, Egypt: Implications for timing of iron mineralization
Afify, A. M.1,2; Serra-Kiel, J.3; Sanz-Montero, M. E.1; Calvo, J. P.1; Sallam, E. S.2
通讯作者Afify, A. M.
来源期刊JOURNAL OF AFRICAN EARTH SCIENCES
ISSN1464-343X
EISSN1879-1956
出版年2016
卷号120页码:44-55
英文摘要

In the northern part of the Bahariya Depression (Western Desert, Egypt) the Eocene carbonate succession, unconformably overlying the Cretaceous deposits, consists of three main stratigraphic units; the Naqb, Qazzun and El Hamra formations. The Eocene carbonates are relevant as they locally host a large economic iron mineralization. This work revises the stratigraphic attribution of the Eocene formations on the basis of larger benthic foraminifers from both carbonate and ironstone beds. Eight Nummulites species spanning the late Ypresian - early Bartonian (SBZ12 to SBZ17) were identified, thus refining the chronostratigraphic framework of the Eocene in that region of Central Egypt. Moreover, additional sedimentological insight of the Eocene carbonate rocks is presented. The carbonate deposits mainly represent shallow marine facies characteristic of inner to mid ramp settings; though deposits interpreted as intertidal to supratidal are locally recognized.


Dating of Nummulites assemblages from the youngest ironstone beds in the mines as early Bartonian provides crucial information on the timing of the hydrothermal and meteoric water processes resulting in the formation of the iron ore mineralization. The new data strongly support a post-depositional, structurally-controlled formation model for the ironstone mineralization of the Bahariya Depression. (C) 2016 Elsevier Ltd. All rights reserved.


英文关键词Nummulites Eocene carbonates Ironstone Chronostratigraphy Western Desert Central Egypt
类型Article
语种英语
国家Spain ; Egypt
收录类别SCI-E
WOS记录号WOS:000378967700005
WOS关键词WESTERN DESERT ; DEPOSITS ; ORIGIN ; IRONSTONES ; EVOLUTION ; ORES
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/2XILL650/193924
作者单位1.Univ Complutense, Fac Geol Sci, Petrol & Geochem Dept, C Jose Antonio Novais 2, E-28040 Madrid, Spain;
2.Benha Univ, Dept Geol, Fac Sci, Banha 13518, Egypt;
3.Univ Barcelona, Stratig Paleontol & Marine Geosci Dept, C Marti & Franques S-N, E-08028 Barcelona, Spain
推荐引用方式
GB/T 7714
Afify, A. M.,Serra-Kiel, J.,Sanz-Montero, M. E.,et al. Nummulite biostratigraphy of the Eocene succession in the Bahariya Depression, Egypt: Implications for timing of iron mineralization[J],2016,120:44-55.
APA Afify, A. M.,Serra-Kiel, J.,Sanz-Montero, M. E.,Calvo, J. P.,&Sallam, E. S..(2016).Nummulite biostratigraphy of the Eocene succession in the Bahariya Depression, Egypt: Implications for timing of iron mineralization.JOURNAL OF AFRICAN EARTH SCIENCES,120,44-55.
MLA Afify, A. M.,et al."Nummulite biostratigraphy of the Eocene succession in the Bahariya Depression, Egypt: Implications for timing of iron mineralization".JOURNAL OF AFRICAN EARTH SCIENCES 120(2016):44-55.
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