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DOI | 10.1016/j.jafrearsci.2014.07.023 |
Stable-isotope stratigraphy of the Cenomanian-Turonian (Upper Cretaceous) boundary event (CTBE) in Wadi Qena, Eastern Desert, Egypt | |
Nagm, Emad1,2; El-Qot, Gamal3; Wilmsen, Markus4 | |
通讯作者 | Nagm, Emad |
来源期刊 | JOURNAL OF AFRICAN EARTH SCIENCES
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ISSN | 1464-343X |
EISSN | 1879-1956 |
出版年 | 2014 |
卷号 | 100页码:524-531 |
英文摘要 | A high-resolution delta C-13 isotope record from Cenomanian-Turonian boundary interval of shallow marine successions in Egypt is presented. The delta C-13 curves show the typical features of the globally documented Cenomanian-Turonian positive excursion, including three of the main positive isotope peaks defining the Cenomanian-Turonian Boundary Event (CTBE). Based on high-resolution ammonite biostratigraphy, the CTBE started in the study area above the Late Cenomanian Neolobites vibrayeanus Zone within the Galala Formation, directly above the global sequence boundary Cenomanian 5 (SB Ce 5). A stratigraphic gap at that level cuts out the lower a-peak of the CTBE. The Cenomanian-Turonian boundary is located within the upper part of the positive excursion between carbon excursion peaks c and d, coinciding with the boundary between the Late Cenomanian Vascoceras cauvini and the Early Turonian Vascoceratid zones. The CTBE ended up-section of peak d, at the base of the Choffaticeras spp. Zone. The amplitude of the positive delta C-13 excursion in Egypt is very high (reaching 6.5 parts per thousand vs. V-PDB) and largely matches curves of European standard sections and others localities from different basins. Furthermore, the Lower Turonian Holywell Isotope Event, an important marker within the lowermost Turonian, has tentatively been recognized. The positive carbon stable isotope curves presented herein represent the outreach of the oceanic anoxic event (OAE) 2 in shallow-water nearshore sequences. (C) 2014 Elsevier Ltd. All rights reserved. |
英文关键词 | Cenomanian-Turonian CTBE Chemostratigraphy Eastern Desert Egypt |
类型 | Article |
语种 | 英语 |
国家 | Egypt ; Saudi Arabia ; Germany |
收录类别 | SCI-E |
WOS记录号 | WOS:000345473200036 |
WOS关键词 | OCEANIC ANOXIC EVENT ; ORBITAL TIME-SCALE ; SEA-LEVEL ; CARBON ; SHALLOW ; SECTION ; MIDDLE ; BIOSTRATIGRAPHY ; ENVIRONMENTS ; PLATFORM |
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/2XILL650/182888 |
作者单位 | 1.Al Azhar Univ, Fac Sci, Dept Geol, Assiut, Egypt; 2.Taibah Univ, Fac Sci, Dept Geol, Tayba, Saudi Arabia; 3.Benha Univ, Fac Sci, Dept Geol, Banha, Egypt; 4.Senckenberg Nat Hist Sammlungen Dresden, Museum Mineral & Geol, Sekt Palaozool, D-01109 Dresden, Germany |
推荐引用方式 GB/T 7714 | Nagm, Emad,El-Qot, Gamal,Wilmsen, Markus. Stable-isotope stratigraphy of the Cenomanian-Turonian (Upper Cretaceous) boundary event (CTBE) in Wadi Qena, Eastern Desert, Egypt[J],2014,100:524-531. |
APA | Nagm, Emad,El-Qot, Gamal,&Wilmsen, Markus.(2014).Stable-isotope stratigraphy of the Cenomanian-Turonian (Upper Cretaceous) boundary event (CTBE) in Wadi Qena, Eastern Desert, Egypt.JOURNAL OF AFRICAN EARTH SCIENCES,100,524-531. |
MLA | Nagm, Emad,et al."Stable-isotope stratigraphy of the Cenomanian-Turonian (Upper Cretaceous) boundary event (CTBE) in Wadi Qena, Eastern Desert, Egypt".JOURNAL OF AFRICAN EARTH SCIENCES 100(2014):524-531. |
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