• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Particulate trace metal fluxes and biogeochemical processes in the ocean

Research Project

Project/Area Number 19K03979
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 17020:Atmospheric and hydrospheric sciences-related
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

Yamaoka Kyoko  国立研究開発法人産業技術総合研究所, 地質調査総合センター, 主任研究員 (30610399)

Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywordsセジメントトラップ / 微量金属 / 鉄同位体 / 元素循環 / 沈降粒子
Outline of Research at the Start

海洋一次生産の制限要因となっている微量金属の循環を明らかにするため、沈降粒子による物質鉛直輸送過程に着目し、太平洋外洋域の赤道から亜寒帯を網羅する地点における微量金属フラックスとその変動要因について検討する。さらに、特に生物生産にとって重要な鉄に着目し、沈降粒子の各構成要素について鉄同位体分析を行うことで、海洋の物質鉛直輸送に伴う鉄の生物地球化学的プロセスを解明する。

Outline of Final Research Achievements

Bulk chemical composition and iron isotopic analysis were performed on sinking particles collected in sediment traps at three sites in the North Pacific Ocean along 175ºE (30ºN subtropical zone, 37ºN transition zone, 46ºN subarctic zone). Elemental fluxes of sinking particles were explained by four dominant factors: lithogenics, carbonate, organic matter, and scavenging, indicating that more than 80% of trace metal fluxes such as nickel, copper, and zinc are added in the ocean. The iron isotopic compositions of sinking particles were similar to that of eolian dust, reflecting the fact that iron is mainly a lithogenics component, but the addition of ferromanganese oxides and organic matter indicated that lighter iron is incorporated.

Academic Significance and Societal Importance of the Research Achievements

海水中の微量金属は一次生産の制限要因となっているため、海水中の溶存金属だけでなく、沈降粒子により鉛直輸送される金属についても検討し、海洋における元素循環を明らかにする必要がある。本研究では、海洋環境が大きく異なる北太平洋の3地点について沈降粒子による元素フラックスを明らかにし、微量金属の鉛直輸送において生物活動やスキャベンジングが予想以上に大きな役割を果たしていることを明らかにした。また、沈降粒子に有機物や鉄マンガン酸化物が付加することにより、海洋から軽い鉄が除去されていることを示すことが出来た。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (20 results)

All 2024 2023 2022 2020 Other

All Int'l Joint Research (2 results) Journal Article (7 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 7 results,  Open Access: 4 results) Presentation (11 results) (of which Int'l Joint Research: 2 results)

  • [Int'l Joint Research] ハワイ大学(米国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] ハワイ大学(米国)

    • Related Report
      2022 Research-status Report
  • [Journal Article] Isotope Geochemistry of Fluid-Rock Interaction in Seafloor Hydrothermal System2024

    • Author(s)
      山岡 香子
    • Journal Title

      Chikyukagaku

      Volume: 58 Issue: 1 Pages: 1-10

    • DOI

      10.14934/chikyukagaku.58.1

    • NAID

      130006198606

    • ISSN
      0386-4073, 2188-5923
    • Year and Date
      2024-03-25
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Impacts of the first deep-sea seafloor massive sulfide mining excavation tests on benthic communities2023

    • Author(s)
      Washburn TW、Iguchi A、Yamaoka K、Nagao M、Onishi Y、Fukuhara T、Yamamoto Y、Suzuki A
    • Journal Title

      Marine Ecology Progress Series

      Volume: 712 Pages: 1-19

    • DOI

      10.3354/meps14287

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Chemical compositions and ages of basalts from seamounts in the Northwest Pacific2022

    • Author(s)
      YAMAOKA Kyoko、ISHIZUKA Osamu、MOROZUMI Haruhisa、HINO Hikari
    • Journal Title

      BULLETIN OF THE GEOLOGICAL SURVEY OF JAPAN

      Volume: 73 Issue: 3 Pages: 103-135

    • DOI

      10.9795/bullgsj.73.3_103

    • ISSN
      1346-4272, 2186-490X
    • Year and Date
      2022-10-26
    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] The magnesium isotopic compositions of the crust and mantle: A study on the Oman ophiolite2022

    • Author(s)
      Eom Jiwon、Yoshimura Toshihiro、Akizawa Norikatsu、Wakaki Shigeyuki、Ishikawa Tsuyoshi、Takazawa Eiichi、Yamaoka Kyoko、Kawahata Hodaka
    • Journal Title

      Chemical Geology

      Volume: 606 Pages: 120969-120969

    • DOI

      10.1016/j.chemgeo.2022.120969

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Anaerobic oxidation of methane and trace-element geochemistry in microbial mat-covered sediments related to methane seepage, northeastern Japan Sea2022

    • Author(s)
      Ota Yuki、Suzumura Masahiro、Tsukasaki Ayumi、Suzuki Atsushi、Yamaoka Kyoko、Asada Miho、Satoh Mikio
    • Journal Title

      Chemical Geology

      Volume: 611 Pages: 121093-121093

    • DOI

      10.1016/j.chemgeo.2022.121093

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Late Summer Peak and Scavenging-Dominant Metal Fluxes in Particulate Export Near a Seamount in the Western North Pacific Subtropical Gyre2020

    • Author(s)
      Yamaoka Kyoko、Suzuki Atsushi、Tanaka Yuichiro、Suzumura Masahiro、Tsukasaki Ayumi、Shimamoto Akifumi、Fukuhara Tatsuo、Matsui Takaaki、Kato Shogo、Okamoto Nobuyuki、Igarashi Yoshiaki
    • Journal Title

      Frontiers in Earth Science

      Volume: 8 Pages: 558823-558823

    • DOI

      10.3389/feart.2020.558823

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Modern precipitation of hydrogenetic ferromanganese minerals during on-site 15-year exposure tests2020

    • Author(s)
      Usui A., Hino H., Suzushima D., Tomioka N., Suzuki Y., Sunamura M., Kato S., Kashiwabara T., Kikuchi S., Uramoto G.-I., Suzuki K., Yamaoka K.
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1 Pages: 1-10

    • DOI

      10.1038/s41598-020-60200-5

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Seasonal variation in planktic foraminifera from sediment trap samples in the North Pacific Subtropical Gyre2023

    • Author(s)
      黒柳あずみ、鈴木淳、山岡香子、橋本優里、藤井武史、近藤俊祐、湊谷純平
    • Organizer
      JpGU Meeting 2023
    • Related Report
      2023 Annual Research Report
  • [Presentation] 北西太平洋亜熱帯域における浮遊性有孔虫の季節変化2023

    • Author(s)
      橋本優里、黒柳あずみ、鈴木 淳、山岡香子、藤井武史、近藤俊祐、湊谷純平
    • Organizer
      JpGU Meeting 2023
    • Related Report
      2023 Annual Research Report
  • [Presentation] アンモニウム塩融解法を用いたICP-MSによる岩石試料の分析2023

    • Author(s)
      鹿籠康行、中野かずみ、源田亜衣、山岡香子、朱 彦北
    • Organizer
      日本分析化学会第72年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 中部北太平洋東経175度線上から採取された沈降粒子の元素フラックスと鉄同位体組成2022

    • Author(s)
      山岡香子、Jasper Konter、川幡穂高
    • Organizer
      2022年度日本地球化学会年会
    • Related Report
      2022 Research-status Report
  • [Presentation] 現世の海底露岩域で生成する鉄マンガン酸化物の性状とクラストの多様性2022

    • Author(s)
      臼井 朗、柏原輝彦、高橋嘉夫、山岡香子、日野ひかり
    • Organizer
      2022年度日本地球化学会年会
    • Related Report
      2022 Research-status Report
  • [Presentation] 海底沈着実験による元素濃集のメカニズム解明2022

    • Author(s)
      臼井 朗、山岡香子、柏原輝彦、日野ひかり
    • Organizer
      JpGU Meeting 2022
    • Related Report
      2022 Research-status Report
  • [Presentation] セジメントトラップ試料を用いた北西太平洋亜熱帯域の浮遊性有孔虫の季節変化2022

    • Author(s)
      黒柳あずみ、鈴木 淳、山岡香子、橋本優里、藤井武史、近藤俊祐、湊谷純平
    • Organizer
      JpGU Meeting 2022
    • Related Report
      2022 Research-status Report
  • [Presentation] Annual particulate element fluxes in the central North Pacific Ocean from 30° to 46°N along 175°E2020

    • Author(s)
      Yamaoka, K., Kawahata, H.
    • Organizer
      Goldschmidt Conference 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Modern precipitation of ferromanganese oxides and metal accumulation during 12-15-yr on-site experiment at NW Pacific seamounts2020

    • Author(s)
      Usui, A., Hino, H., Suzushima, D., Kashiwabara, T., Tomioka, N., Yamaoka, K.
    • Organizer
      Goldschmidt Conference 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] コバルトリッチクラスト国際鉱区における堆積物の特性2020

    • Author(s)
      山岡香子,鈴木 淳,太田雄貴,田中裕一郎,嶋本晶文,福原達雄,湊谷純平,加藤正悟,五十嵐吉昭,岡本信行
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Related Report
      2020 Research-status Report
  • [Presentation] Strontium isotopic compositions of marine peridotites in the Oman ophiolite2020

    • Author(s)
      Jiwon Eom, 若木重行,秋澤紀克,石川剛志,山岡香子,高澤栄一,川幡穂高
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Related Report
      2020 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi