DOI: 10.1002/grl.50975
论文题名: Seismic transect across the Lomonosov and Mendeleev Ridges: Constraints on the geological evolution of the Amerasia Basin, Arctic Ocean
作者: Jokat W. ; Ickrath M. ; O'Connor J.
刊名: Geophysical Research Letters
ISSN: 0094-8517
EISSN: 1944-8248
出版年: 2013
卷: 40, 期: 19 起始页码: 5047
结束页码: 5051
语种: 英语
英文关键词: Arctic
; Makarov Basin
; seismic
Scopus关键词: Arctic
; Geological evolution
; Graben structures
; Makarov Basin
; seismic
; Seismic reflection data
; Seismic reflections
; Tholeiitic basalts
; Bathymetry
; Plates (structural components)
; Seismic waves
; Seismology
; basin evolution
; geological structure
; microplate
; plate tectonics
; seismic reflection
; transect
; volcanic landform
; Amerasian Basin
; Arctic Ocean
; Lomonosov Ridge
; Mendeleyev Ridge
英文摘要: We report on seismic and petrological data that provide new constraints on the geological evolution of the Amerasia Basin. A seismic reflection transect across the Makarov Basin, located between the Mendeleev and Lomonosov Ridges, shows a complete undisturbed sedimentary section of Mesozoic/Cenozoic age. In contrast to the Mendeleev Ridge, the margin of the Lomonosov Ridge is wide and shows horst and graben structures. We suggest that the Mendeleev Ridge is most likely volcanic in origin and support this finding with a 40Ar/ 39Ar isotopic age for a tholeiitic basalt sampled from the central Alpha/Mendeleev Ridge. Seismic reflection data for the Makarov Basin show no evidence of compressional features, consistent with the Lomonosov Ridge moving as a microplate in the Cenozoic. We propose that the Amerasia Basin moved as a single tectonic plate during the opening of the Eurasia Basin. Key Points Upper age constraints for the formation of the Mendeleev Ridge Lomonosov Ridge and Mendeleev Ridge are not conjugate margins Amerasia Basin moved as a single plate for most of Cenozoic ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84884866581&doi=10.1002%2fgrl.50975&partnerID=40&md5=c585221599a9c1ade167696f6be81251
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5781
Appears in Collections: 气候减缓与适应
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作者单位: Polar and Marine Research, Alfred Wegener Institute, DE-27568 Bremerhaven, Germany
Recommended Citation:
Jokat W.,Ickrath M.,O'Connor J.. Seismic transect across the Lomonosov and Mendeleev Ridges: Constraints on the geological evolution of the Amerasia Basin, Arctic Ocean[J]. Geophysical Research Letters,2013-01-01,40(19).