中国レス中の土壌化起源磁性ナノ粒子のTEM観察

松本 恵; 瀬戸 雄介; 佐野 拓郎; 鈴木 康太; 兵頭 政幸; 三宅 亮; 浜根 大輔; 境家 達弘

doi:10.14824/jakoka.2016.0_124

2016 Annual Meeting of Japan Association of Mineralogical Sciences

Session ID : R4-06

DOI https://doi.org/10.14824/jakoka.2016.0_124

Conference information

Host: Japan Association of Mineralogical Sciences

R4: Mineral science of the Earth surface

TEM observations of pedogenic nanoparticles causing magnetic enhancement in Chinese loess deposits

*Megumi Matsumoto, Yusuke Seto, Takuroh Sano, Kouta Suzuki, Masayuki Hyodo, Akira Miyake, Daisuke Nishio-Hamane, Tatsuhiro Sakaiya

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Keywords: Chinese loess, pedogenesis, magnetic enhancement, TEM

CONFERENCE PROCEEDINGS FREE ACCESS

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Abstract

Magnetic enhancement in Chinese loess is thought to be caused by formations of magnetic grains during pedogenesis. However, there is no mineralogical study confirming it. Here we show the results of XRD and SEM/TEM study of magnetic grains in Chinese loess. Magnetic grains (hematite and magnetite) exist mainly as nano inclusions in muscovite and occupy < 1% of the total loess volume. The magnetic grains were probably formed in situ during pedogenesis and responsible for the magnetic enhancement.

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