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Martian sub-crustal stress from gravity and topographic models

文献类型：期刊论文

作者Tenzer, Robert1; Eshagh, Mehdi2,3; Jin, Shuanggen4,5,6
刊名EARTH AND PLANETARY SCIENCE LETTERS
出版日期2015-09-01
卷号425期号:1页码:84-92
关键词crust gravity impact craters Mars stress field volcanoes
英文摘要The latest Martian gravity and topographic models derived from the Mars Orbiter Laser Altimeter and the Mars Global Surveyor spacecraft tracking data are used to compute the sub-crustal stress field on Mars. For this purpose, we apply the method for a simultaneous determination of the horizontal subcrustal stress component and the crustal thickness based on solving the Navier-Stokes problem and incorporating the Vening Meinesz Moritz inverse problem of isostasy. Results reveal that most of the Martian sub-crustal stress is concentrated in the Tharsis region, with the most prominent signatures attributed to a formation of Tharsis major volcanoes followed by crustal loading. The stress distribution across the Valles Marineris rift valleys indicates extensional tectonism. This finding agrees with more recent theories of a tectonic origin of Valles Marineris caused, for instance, by a crustal loading of the Tharsis bulge that resulted in a regional trusting and folding. Aside from these features, the Martian stress field is relatively smooth with only a slightly enhanced pattern of major impact basins. The signatures of active global tectonics and polar ice load are absent Whereas the signature of the hemispheric dichotomy is also missing, the long-wavelength spectrum of the stress field comprises the signature of additional dichotomy attributed to the isostatically uncompensated crustal load of Tharsis volcanic accumulations. These results suggest a different origin of the Earth's and Martian sub-crustal stress. Whereas the former is mainly related to active global tectonics, the latter is generated by a crustal loading and regional tectonism associated with a volcanic evolution on Mars. The additional sub-crustal stress around major impact basins is likely explained by a crustal extrusion after impact followed by a Moho uplift. (C) 2015 Elsevier B.V. All rights reserved.
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Geochemistry & Geophysics
研究领域[WOS]Geochemistry & Geophysics
关键词[WOS]MARS GLOBAL SURVEYOR ; HEMISPHERIC DICHOTOMY ; SNC METEORITES ; THARSIS REGION ; EVOLUTION ; THICKNESS ; MANTLE ; LITHOSPHERE ; ADMITTANCE ; SIGNATURE
收录类别SCI
语种英语
WOS记录号WOS:000357755300009
源URL[http://119.78.226.72/handle/331011/28203]  
专题上海天文台_天文地球动力学研究中心
作者单位1.Wuhan Univ, Sch Geodesy & Geomat, Key Lab Geospace Environm & Geodesy, Wuhan 430079, Peoples R China
2.Univ West, Dept Engn Sci, Trollhattan, Sweden
3.Royal Inst Technol KTH, Div Geodesy & Geoinformat, Stockholm, Sweden
4.Chinese Acad Sci, Shanghai Astron Observ, Shanghai, Peoples R China
5.Bulent Ecevit Univ, Dept Geomat Engn, Zonguldak, Turkey
6.Changsha Univ Sci & Technol, Sch Traff & Transportat Engn, Changsha, Hunan, Peoples R China
推荐引用方式
GB/T 7714		 Tenzer, Robert,Eshagh, Mehdi,Jin, Shuanggen. Martian sub-crustal stress from gravity and topographic models[J]. EARTH AND PLANETARY SCIENCE LETTERS,2015,425(1):84-92.
APA Tenzer, Robert,Eshagh, Mehdi,&Jin, Shuanggen.(2015).Martian sub-crustal stress from gravity and topographic models.EARTH AND PLANETARY SCIENCE LETTERS,425(1),84-92.
MLA Tenzer, Robert,et al."Martian sub-crustal stress from gravity and topographic models".EARTH AND PLANETARY SCIENCE LETTERS 425.1(2015):84-92.

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