Magnetic Properties of Yamato-73-04 and Yamato-73-07 Meteorites
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- Nagata Takesi
- National Institute of Polar Research
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- Sugiura Naoji
- Geophysical Institute, University of Tokyo
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- Schwerer F.C.
- U.S. Steel Corporation Research Laboratory
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Two Yamato meteorites collected in 1973 in Antarcica, Yamato-73-04 and Yamato-73-07, may be identified to an olivine-bronzite chondrite and a hypersthene achondrite respectively from their petrographic and chemical compositions. Magnetic analyses indicate that native irons in Yamato-73-04 chondrite comprise 2.6wt% of 7wt% Ni kamacite and 4.3wt% of 13wt% Ni kamacite, and that Yamato-73-07 achondrite contains 0.24wt% of Fe^0 with small amounts of Ni and Co and less than 0.02wt% of 60wt% Ni taenite or Fe_<3-x>Cr_xO_4. The natural remanent magnetization, NRM, of Yamato-73-07 achondrite can be distinctly separated into the original NRM of the undisturbed interior of 6.3×10^<-6> emu/gm in intensity and the secondary NRM of the surface skin fusion crust of about 0.5mm in thickness. The secondary NRM is attributable to the thermoremanent magnetization acquired in a magnetic field of 0.44 Oe-probably the geomagnetic field.
収録刊行物
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- Memoirs of National Institute of Polar Research. Ser. C, Earth sciences
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Memoirs of National Institute of Polar Research. Ser. C, Earth sciences 10 12-29, 1976-12
国立極地研究所
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詳細情報 詳細情報について
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- CRID
- 1571417126771917568
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- NII論文ID
- 110000009146
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- NII書誌ID
- AA00733470
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- ISSN
- 03865533
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- 本文言語コード
- en
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- データソース種別
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- CiNii Articles