Constraints on the Source of the Martian Magnetic Anomalies Inferred From Relaxation Time of Remanent Magnetization

DOI Web Site Web Site 被引用文献2件 参考文献51件
  • M. Sato
    Department of Earth and Planetary Science The University of Tokyo Tokyo Japan
  • Y. Yamamoto
    Center for Advanced Marine Core Research Kochi University Kochi Japan
  • T. Nishioka
    Graduate School of Integrated Arts and Sciences Kochi University Kochi Japan
  • K. Kodama
    Research Center for Knowledge Science in Cultural Heritage Doshisha University Kyoto Japan
  • N. Mochizuki
    Priority Organization for Innovation and Excellence Kumamoto University Kumamoto Japan
  • M. Ushioda
    Geological Survey of Japan National Institute of Advanced Industrial Science and Technology Ibaraki Japan
  • R. Nakada
    Kochi Institute for Core Sample Research Japan Agency for Marine‐Earth Science and Technology (JAMSTEC) Kochi Japan
  • H. Tsunakawa
    Department of Earth and Planetary Sciences Tokyo Institute of Technology Tokyo Japan

書誌事項

公開日
2018-07-13
資源種別
journal article
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1029/2018gl077498
公開者
American Geophysical Union (AGU)

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説明

<jats:title>Abstract</jats:title><jats:p>The strong magnetic anomalies observed over Mars originate from remanence of deep crust, which should be preserved during 4 billion years. We estimate the relaxation time of remanence carried by various types of magnetite, considering temperature and pressure dependences of magnetic parameters. The estimation shows that acicular‐shaped single‐domain magnetite is needed to retain the thick magnetized layer during 4 billion years in a low‐Urey ratio scenario, whereas acicular‐shaped single‐domain, equidimensional single‐domain, and pseudo‐single‐domain magnetites can be the source of anomalies in a high‐Urey ratio scenario. In each case, fine‐grained (<10 μm) and preferably high‐aspect‐ratio magnetite in deep crust is needed to explain the observed anomalies.</jats:p>

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