Redox control in arsenic accumulation with organic matter derived from a varved lacustrine deposit in the Jurassic accretionary complexes

Masuki, Yuma*; Katsuta, Nagayoshi*; Naito, Sayuri*; Murakami, Takuma*; Umemura, Ayako*; Fujita, Natsuko ; Matsubara, Akihiro*; Minami, Masayo*; Niwa, Masakazu ; Yoshida, Hidekazu*; Kojima, Satoru*

Lacustrine deposits have 30-fold higher As abundance than the average crustal deposit. Arsenic is mostly concentrated as discrete horizons deposited in spring and autumn. As-rich layers contain FeAsS, AsS, and As $_{2}$ S $_{3}$ but As-rich hotspots mostly contain FeAsS. As accumulation to sediment is controlled by redox potential with organic matter.

Language	:	English
Journal	:	Journal of Hazardous Materials
Volume	:	485
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Pages	:	p.136843_1 - 136843_10
Publication Year/Month	:	2025/03
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Paper URL	:	https://doi.org/10.1016/j.jhazmat.2024.136843
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Keywords	:	no keyword
Research Facility	:	ペレトロン年代測定装置
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Registration No. : AA20240929
JAEA Abstracts No. : 53000475
Paper Submission No. : 29247

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