DOI: 10.1002/2014GL060464
论文题名: Martian meteorites and Martian magnetic anomalies: A new perspective from NWA 7034
作者: Gattacceca J. ; Rochette P. ; Scorzelli R.B. ; Munayco P. ; Agee C. ; Quesnel Y. ; Cournède C. ; Geissman J.
刊名: Geophysical Research Letters
ISSN: 0094-9914
EISSN: 1944-9645
出版年: 2014
卷: 41, 期: 14 起始页码: 4859
结束页码: 4864
语种: 英语
英文关键词: Martian magnetic anomalies
; Martian meteorites
; NWA 7034
Scopus关键词: Lithology
; Meteorites
; Minerals
; Cation substitutions
; Hydrothermal alterations
; Magnetic anomalies
; Magnetic mineralogy
; Magnetic phasis
; Martian meteorites
; NWA 7034
; Superparamagnetics
; Magnetism
; concentration (composition)
; lithology
; magnetic field
; magnetic property
; magnetization
; Martian atmosphere
; meteorite
英文摘要: We present the magnetic properties of the Noachian Martian breccia NWA 7034. Among the 25 unpaired Martian meteorites studied to date, NWA 7034 has a unique magnetic mineralogy. It contains about 15 wt % of iron oxides as magnetite that has experienced cation substitution and partial alteration to maghemite, with about a quarter of the oxides being pure maghemite. It also contains oxyhydroxides in the form of superparamagnetic goethite. The presence of maghemite and goethite makes NWA 7034 the most oxidized Martian meteorite. The overall magnetic assemblage is partly linked to near-surface hydrothermal alteration. The high concentration of magnetic phases with high laboratory unblocking temperatures makes NWA 7034 a plausible analogue source lithology for the strong magnetization of the Martian Noachian crust. Near-surface hydrothermal alteration can enhance the remanence of Martian rocks and account for local, high magnetic anomalies of shallow source. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904715431&doi=10.1002%2f2014GL060464&partnerID=40&md5=881d8a78d62c64c3026b92e91777ef11
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7178
Appears in Collections: 气候减缓与适应
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作者单位: CNRS/Aix Marseille Université, CEREGE UM34, Aix-en-Provence, France
Recommended Citation:
Gattacceca J.,Rochette P.,Scorzelli R.B.,et al. Martian meteorites and Martian magnetic anomalies: A new perspective from NWA 7034[J]. Geophysical Research Letters,2014-01-01,41(14).