DOI: 10.1002/2014GL062032
论文题名: Contribution of multidomain titanomagnetite to the intensity and stability of Mars crustal magnetic anomalies
作者: Brachfeld S. ; Cuomo D. ; Tatsumi-Petrochilos L. ; Bowles J.A. ; Shah D. ; Hammer J.
刊名: Geophysical Research Letters
ISSN: 0094-9598
EISSN: 1944-9329
出版年: 2014
卷: 41, 期: 22 起始页码: 7997
结束页码: 8005
语种: 英语
英文关键词: Mars magnetic anomalies
; multidomain titanomagnetite
; planetary magnetism
; rock magnetism
; synthetic basalts
Scopus关键词: Basalt
; Magnetization
; Quartz
; Remanence
; Anhysteretic remanent magnetizations
; Coercivity enhancement
; Crustal magnetic anomalies
; Magnetic anomalies
; Rock magnetism
; Synthetic basalts
; Thermoremanent magnetization
; Titanomagnetites
; Magnetism
; basalt
; magnetite
; magnetization
; Mars
; rock
; stabilization
; temperature effect
; Highland
; Scotland
; United Kingdom
英文摘要: Two basalts with compositions relevant to the crusts of Mars and Earth were synthesized at igneous temperatures and held at 650°C for 21 to 257 days under quartz-fayalite-magnetite fO2 buffer conditions. The run products are germane to slowly cooled igneous intrusions, which might be a significant volumetric fraction of the Martian crust and carriers of magnetic anomalies in the Southern Highlands. Both basalts acquired intense thermoremanent magnetizations and intense but easily demagnetized anhysteretic remanent magnetizations carried by homogeneous multidomain titanomagnetite. Hypothetical intrusions on Mars composed of these materials would be capable of acquiring intense remanences sufficient to generate the observed anomalies. However, the remanence would be easily demagnetized by impact events after the cessation of the Mars geodynamo. Coercivity enhancement by pressure or formation of single domain regions via exsolution within the multidomain grains is necessary for long-term retention of a remanence carried exclusively by multidomain titanomagnetite grains. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84923342418&doi=10.1002%2f2014GL062032&partnerID=40&md5=be4432993b55e0d5a4cf1f0f14fa5950
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6862
Appears in Collections: 气候减缓与适应
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作者单位: Department of Earth and Environmental Studies, Montclair State University, Montclair, NJ, United States
Recommended Citation:
Brachfeld S.,Cuomo D.,Tatsumi-Petrochilos L.,et al. Contribution of multidomain titanomagnetite to the intensity and stability of Mars crustal magnetic anomalies[J]. Geophysical Research Letters,2014-01-01,41(22).