| DOI: | 10.1038/ngeo2784
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| 论文题名: | Palaeozoic oceanic crust preserved beneath the eastern Mediterranean |
| 作者: | Granot R.
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| 刊名: | Nature Geoscience
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| ISSN: | 17520894
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| 出版年: | 2016
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| 卷: | 9, 期:9 | | 起始页码: | 701
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| 结束页码: | 705
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| 语种: | 英语
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| Scopus关键词: | Cenozoic
; kinematics
; magnetic anomaly
; Mesozoic
; oceanic crust
; Paleozoic
; Pangaea
; plate tectonics
; preservation
; sedimentary sequence
; Tethys
; Mediterranean Sea
; Mediterranean Sea (East)
|
| 英文摘要: | Subduction of oceanic crust into the mantle results in the relatively young Mesozoic-Cenozoic age of the current oceanic basins, thus, hindering our knowledge of ancient oceanic lithospheres. Believed to be an exception, the eastern Mediterranean Sea (containing the Herodotus and Levant basins) preserves the southern margin of the Neotethyan, or older, ocean. An exceptionally thick sedimentary cover and a lack of accurate magnetic anomaly data have led to contradicting views about its crustal nature and age. Here I analyse total and vector magnetic anomaly data from the Herodotus Basin. I identify a long sequence of lineated magnetic anomalies, which imply that the crust is oceanic. I use the shape, or skewness, of these magnetic anomalies to constrain the timing of crustal formation and find that it formed about 340 million years ago. I suggest that this oceanic crust formed either along the Tethys spreading system, implying the Neotethys Ocean came into being earlier than previously thought, or during the amalgamation of the Pangaea Supercontinent. Finally, the transition from the rather weak and stretched continental crust found in the Levant Basin to the relatively strong oceanic Herodotus crust seems to guide the present-day seismicity pattern as well as the plate kinematic evolution of the region. © 2016 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/105925
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| Appears in Collections: | 气候减缓与适应
科学计划与规划
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作者单位: | Department of Geological and Environmental Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
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| Recommended Citation: | |
Granot R.. Palaeozoic oceanic crust preserved beneath the eastern Mediterranean[J]. Nature Geoscience,2016-01-01,9(9)
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