ゴンドワナ大陸分裂初期過程の解明：白亜紀スーパークロンに形成した海洋底はどこか？

• Project/Area Number: 18H01317
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 17040:Solid earth sciences-related
• Research Institution: National Institute of Polar Research
• Principal Investigator: 野木 義史 国立極地研究所, 研究教育系, 教授 (90280536)
• Co-Investigator(Kenkyū-buntansha): 佐藤 太一 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 (50613246) ; 藤井 昌和 国立極地研究所, 研究教育系, 助教 (80780486)
• Project Period (FY): 2018-04-01 – 2022-03-31
• Project Status: Granted (Fiscal Year 2021)
• Budget Amount: ¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000); Fiscal Year 2021: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000); Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2018: ¥11,570,000 (Direct Cost: ¥8,900,000、Indirect Cost: ¥2,670,000)
• Keywords: 地磁気異常 / 海洋底拡大 / 大陸分裂 / 白亜紀スーパークロン / 海嶺系

Outline of Annual Research Achievements

本研究課題は、地球物理観測とデータの統合的解析を通して、白亜紀スーパークロンを中心とした、インド洋におけるゴンドワナ大陸分裂の初期過程の解明を目的とするものである。以下、2020年度の本研究課題の実施概要を示す。
南インド洋の既存の地磁気異常、重力異常および海底地形データの収集・整理を継続し、南西インド洋海嶺周辺からコンラッドライズまでを中心に、現在から白亜紀スーパークロンの終了するC34(約8400万年前)までの年代同定や海底拡大史の再検討を継続した。特に、マダガスカル海嶺およびデルカノライズ周辺での地磁気異常を用い年代同定の再検討の結果、新たなデータのよる年代同定が可能となり、提唱されているC34以前の海洋底拡大史を修正する必要がある事がわかった。また、南部マダガスカル海嶺とデルカノライズが、C34頃には一体化した海台であった可能性を示した。これらの結果をまとめ、論文を国際誌に公表した。さらに、デルカノライズとコンラッドライズも一体化していた事が示唆された。かって一塊であったと考えられる海台、南部マダガスカル海嶺、デルカノライズおよびコンラッドライズの成因についても検討し、大規模な火成活動による形成では、説明が難しく、大陸地殻の断片である可能性も示された。
また、国内外の観測船による新たなデータを取得予定であったが、新型コロナウイルス感染症の影響により観測航海の延期や中止により、観測データの収集および整備が遅延した。

Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

南インド洋の既存の地磁気異常、重力異常および海底地形データの収集・整備を順調に継続し、新たな海底拡大史の検討が進み、マダガスカル海嶺およびデルカノライズ周辺域での結果をとりまとめ、国際誌に公表した。新たなデータの取得および整備は新型コロナウイルス感染症の影響により遅延しているが、海底拡大史の検討等は着実に進んでいる。
以上から、本研究課題において、当該年度の予定通りの内容をほぼ着実に実施できた事から、区分(2)とする。

Strategy for Future Research Activity

南インド洋の既存の地磁気異常、重力異常および海底地形データの再検討に関しては、解析を進、一部の結果を公表できた。さらに、南西インド洋海嶺周辺からコンラッドライズまでを中心に海底拡大史の検討に加え、南極縁辺域の解析も進めて、白亜紀スーパークロンを軸とした、インド洋におけるゴンドワナ大陸分裂の初期過程解明に関する研究を推進する白亜紀スーパークロン前後の、より詳細な統合的データ解析を実施するため、新たなデータを加え、データベース化を進め、インド洋域の固体地球物理データ等の整備を強化し、情報共有を促進する。

Research Products

• [Int'l Joint Research] Geoscience Australia/豪州南極局(オーストラリア)
• [Int'l Joint Research] アルフレッドウェゲナー極地海洋研究所(ドイツ)
• [Journal Article] A New Tectonic Model Between the Madagascar Ridge and Del Cano Rise in the Indian Ocean (2022)
  • Author(s): Sato Taichi、Nogi Yoshifumi、Sato Hiroshi、Fujii Masakazu
  • Journal Title: Journal of Geophysical Research: Solid Earth Volume: 127 Pages: 1-15
  • DOI: 10.1029/2021jb021743
  • Peer Reviewed / Open Access
• [Journal Article] Anatomy and dynamics of a mixed contourite sand sheet, Ryukyu Island Arc, northwestern Pacific Ocean (2022)
  • Author(s): Nishida Naohisa、Itaki Takuya、Amano Atsuko、Katayama Hajime、Sato Taichi、Stow Dorrik、Nicholson Uisdean
  • Journal Title: Marine Geology Volume: 444 Pages: 106707-106707
  • DOI: 10.1016/j.margeo.2021.106707
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Geochemical characteristics of back-arc basin lower crust and upper mantle at final spreading stage of Shikoku Basin: an example of Mado Megamullion (2021)
  • Author(s): Akizawa, N., Ohara, Y., Okino, K., Ishizuka, O., Yamashita, H., Machida, S., Sanflippo, A., Basch, V., Snow, J.E., Sen, A., Hirauchi, K., Michibayashi, K., Harigane, Y., Fujii, M., Asanuma, H., Hirata, T.
  • Journal Title: Progress in Earth and Planetary Science Volume: 8 Pages: 1-24
  • DOI: 10.1186/s40645-021-00454-3
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Melting and evolution of amphibole-rich back-arc abyssal peridotites at the Mado Megamullion, Shikoku Basin (2021)
  • Author(s): Sen, A., Snow, J.E., Ohara, Y., Hirauchi, K., Kouketsu, Y., Sanfilippo, A., Basch, V., Harigane, Y., Fujii, M., Okino, K., Akizawa, N.
  • Journal Title: Geochemistry, Geophysics, Geosystems Volume: 22 Pages: 1-20
  • DOI: 10.1029/2021gc010013
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Imaging of a serpentinite complex in the Kamuikotan Zone, northern Japan, from magnetotelluric soundings (2021)
  • Author(s): Ichihara Hiroshi、Mogi Toru、Uchida Toshihiro、Satoh Hideyuki、Yamaya Yusuke、Fujii Masakazu、Yamazaki Shusaku、Okazaki Kenji、Tada Noriko
  • Journal Title: Earth, Planets and Space Volume: 73 Pages: 1-11
  • DOI: 10.1186/s40623-021-01482-5
  • Peer Reviewed / Open Access
• [Journal Article] Alteration processes recorded by back-arc mantle peridotites from oceanic core complexes, Shikoku Basin, Philippine Sea (2021)
  • Author(s): Hirauchi, K., Segawa, I., Kouketsu, Y., Harigane, Y., Ohara, Y., Snow, J., Sen, A., Fujii, M., Okino, K.
  • Journal Title: Island Arc Volume: 30 Pages: 1-13
  • DOI: 10.1111/iar.12419
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Seasonal Evolution of Cape Darnley Bottom Water Revealed by Mooring Measurements (2021)
  • Author(s): Mizuta Genta、Fukamachi Yasushi、Simizu Daisuke、Matsumura Yoshimasa、Kitade Yujiro、Hirano Daisuke、Fujii Masakazu、Nogi Yoshifumi、Ohshima Kay I.
  • Journal Title: Frontiers in Marine Science Volume: 8
  • DOI: 10.3389/fmars.2021.657119
  • Peer Reviewed
• [Journal Article] Dense water downslope flow and AABW production in a numerical model: Sensitivity to horizontal and vertical resolution in the region off Cape Darnley polynya (2021)
  • Author(s): Mensah Vigan、Nakayama Yoshihiro、Fujii Masakazu、Nogi Yoshifumi、Ohshima Kay I.
  • Journal Title: Ocean Modelling Volume: 165 Pages: 101843-101843
  • DOI: 10.1016/j.ocemod.2021.101843
  • Peer Reviewed
• [Journal Article] Modeling intensive ocean-cryosphere interactions in Luzow-Holm Bay, East Antarctica (2021)
  • Author(s): Kusahara Kazuya、Hirano Daisuke、Fujii Masakazu、Fraser Alexander D.、Tamura Takeshi
  • Journal Title: The Cryosphere Volume: 15 Pages: 1697-1717
  • DOI: 10.5194/tc-15-1697-2021
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Visualisation method for the broad distribution of seafloor ferromanganese deposits (2019)
  • Author(s): Machida Shiki、Sato Taichi、Yasukawa Kazutaka、Nakamura Kentaro、Iijima Koichi、Nozaki Tatsuo、Kato Yasuhiro
  • Journal Title: Marine Georesources & Geotechnology Volume: - Pages: 1-13
  • DOI: 10.1080/1064119x.2019.1696432
  • NAID: 120007002618
  • Peer Reviewed / Open Access
• [Journal Article] Near-seafloor magnetic mapping of off-axis lava flows near the Kairei and Yokoniwa hydrothermal vent fields in the Central Indian Ridge (2018)
  • Author(s): Fujii Masakazu、Okino Kyoko
  • Journal Title: Earth Planets and Space Volume: 70 Pages: 1-17
  • DOI: 10.1186/s40623-018-0959-5
  • Peer Reviewed / Open Access
• [Journal Article] Seafloor hydrothermal alteration affecting magnetic properties of abyssal basaltic rocks: insights from back-arc lavas of the Okinawa Trough (2018)
  • Author(s): Fujii Masakazu、Sato Hiroshi、Togawa Eri、Shimada Kazuhiko、Ishibashi Jun-ichiro
  • Journal Title: Earth, Planets and Space Volume: 70 Pages: 1-14
  • DOI: 10.1186/s40623-018-0958-6
  • Peer Reviewed / Open Access
• [Journal Article] New Magnetic Anomaly Map of the Antarctic (2018)
  • Author(s): Golynsky A. V. et al. (Nogi, Y., 31名中28番目)
  • Journal Title: Geophysical Research Letters Volume: 45 Pages: 6437-6449
  • DOI: 10.1029/2018gl078153
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Applying the Burr Type XII Distribution to Decompose Remanent Magnetization Curves (2018)
  • Author(s): Zhao Xiangyu、Fujii Masakazu、Suganuma Yusuke、Zhao Xiang、Jiang Zhaoxia
  • Journal Title: Journal of Geophysical Research: Solid Earth Volume: 123 Pages: 8298-8311
  • DOI: 10.1029/2018jb016082
  • Peer Reviewed / Int'l Joint Research
• [Presentation] Multibeam bathymetry off East Antarctica: 2010s Japanese observations (2021)
  • Author(s): Fujii M,, Y. Nogi
  • Organizer: 日本地球惑星連合2021年大会
  • Int'l Joint Research
• [Presentation] Deep-tow magnetics for 29_33 Myr seafloor of the Southeast Indian Ridge (2021)
  • Author(s): Fujii M,, K. Okino
  • Organizer: 日本地球惑星連合2021年大会
  • Int'l Joint Research
• [Presentation] Classification and estimation of petit-spot volcanos by acoustic measurement data (2021)
  • Author(s): Yuki Matamura, Naoto Hirano, Masakazu Fujii
  • Organizer: 日本地球惑星連合2021年大会
  • Int'l Joint Research
• [Presentation] Magnetic and gravity constraints on crustal structure of the Nosappu Fracture Zone, Northwestern Pacific (2021)
  • Author(s): Mai Kintsu, Nobukazu Seama, Masakazu Fujii, Tomoko Hanyu
  • Organizer: 日本地球惑星連合2021年大会
  • Int'l Joint Research
• [Presentation] The link between volcanism and tectonics at back-arc rifting stage: analysis of three volcanic areas in the southern Okinawa Trough (2021)
  • Author(s): Jinyu Zhou, Kyoko Okino, Masakazu Fujii
  • Organizer: 日本地球惑星連合2021年大会
  • Int'l Joint Research
• [Presentation] Hydrothermal experiments in olivine-orthopyroxene-H2O system at 200-400C: implications for hydrogen generation at high temperatures (2021)
  • Author(s): Shuhei Tanaka, Atsushi Okamoto, Otgonbayar Dandar, Masaoki Uno, Masakazu Fujii
  • Organizer: 日本地球惑星連合2021年大会
  • Int'l Joint Research
• [Presentation] The new tectonic model between the Madagascar Ridge and the Del Cano Rise in the southern Indian Ocean (2021)
  • Author(s): Taichi Sato, Yoshifumi Nogi, Hiroshi Sato, Masakazu Fujii.
  • Organizer: 日本地球惑星連合2021年大会
  • Int'l Joint Research
• [Presentation] Development of Research Instruments for unexplored frontiers in the Southern Ocean and Antarctica (2021)
  • Author(s): Yoshifumi Nogi, Shigeru Aoki, Hiroshi Yoshida, Toshihiro Maki, Kyoko Okino, Yuichi Aoyama, Tetsuo Sueyoshi, Takeshi Tamura, Hirokazu Yamagata, Masakazu Fujii
  • Organizer: 日本地球惑星連合2021年大会
  • Int'l Joint Research
• [Presentation] Mado Megamullion: a potential new target for IODP drilling to understand backarc basin lithospher (2021)
  • Author(s): Yasuhiko Ohara, Masakazu Fujii, Norikatsu Akizawa, Valentin Basch, Yumiko Harigane, Ken-ichi Hirauchi, Osamu Ishizuka, Shiki Machida, Katsuyoshi Michibayashi, Kyoko Okino, Alessio Sanfilippo, Camilla Sani, Sen Atlanta, Jonathan E Snow, Kenichiro Tani, Hiroyuki Yamashita
  • Organizer: 日本地球惑星連合2021年大会
  • Int'l Joint Research
• [Presentation] Abrupt Holocene ice-sheet retreat in Lutzow-Holm Bay, East Antarctica (2021)
  • Author(s): Suganuma, Y., Haneda, Y., Itaki, T., Seki, O., Ishiwa, T., Kawamata, M., Fujii, M., Kusahara, K., Hirano, D., Iwai, M., Kato, Y., Matsui, H., Amano, A., Katsuki, K., Omori, T., Hirabayashi, M., Matsuzaki,H., Yamagata, T., Ito, M., Sugiyama, S., Nishida, N., Okuno, J., Ikehara, M., Miura, H.
  • Organizer: 日本地球惑星連合2021年大会
  • Int'l Joint Research
• [Presentation] Origin of Philippine Sea basins -Tectonic setting leading to subduction initiation of Izu-Bonin-Mariana arc- (2021)
  • Author(s): Ishizuka, O., Tani, K., Shimoda, G., Harigane, Y., Sato, T., Rex, T., Umino, S., Hei, T., Sakamoto, I., Yokoyama, Y., Uchiyama, R., Wakayama, T., Suzuki, A., Narita, K., Ogawa, T., Ohara, Y., Conway, C.
  • Organizer: 日本地球惑星連合2021年大会
  • Int'l Joint Research
• [Presentation] Near-seafloor magnetic anomaly reveals geomagnetic field fluctuation during 29_33 Myr (2021)
  • Author(s): Fujii M., K. Okino, C. Tamura
  • Organizer: 第150回 地球電磁気・地球惑星圏学会 総会・講演会
• [Presentation] Magnetic and gravity constraints on crustal structure of the Nosappu Fracture ZoneNorthwestern Pacific (2021)
  • Author(s): 近都麻衣,藤井昌和,羽入朋子,島伸和
  • Organizer: 第150回 地球電磁気・地球惑星圏学会 総会・講演会
• [Presentation] Paleomagnetic directions and intensities from volcanic rocks in the Tendaho Graben in the Afar depression Ethiopia (2021)
  • Author(s): 劉浩田,望月伸竜,加藤千恵,Kidane Tesfaye,Muluneh Ameha,藤井昌和,吉村令慧,加々島慎一,乙藤洋一郎,石川尚人
  • Organizer: 第150回 地球電磁気・地球惑星圏学会 総会・講演会
• [Presentation] 北海道神居古潭帯鷹泊蛇紋岩岩体の蛇紋岩化プロセスの解析：ボーリングコア試料への示差熱重量分析・密度測定・磁化率測定の適用 (2021)
  • Author(s): 山崎秀策, 藤井昌和, 倉橋稔幸
  • Organizer: 日本地質学会第128年学術大会
• [Presentation] オマーンオフィオライトの蛇紋岩化した地殻―マントル境界におけるFe(III)の分布 (2021)
  • Author(s): 岡本敦, 吉田一貴, 大柳良介, 藤井昌和, 丹羽尉博, 武市泰男, 木村 正雄
  • Organizer: 日本地質学会第128年学術大会
• [Presentation] マントルかんらん岩の蛇紋岩化反応と磁鉄鉱の生成への温度、シリカの影響:海洋リソスフェアにおける水素の生成に関する提言 (2021)
  • Author(s): 田中修平, 岡本敦, ダンダル オトゴンバヤル, 宇野正起, 藤井昌和
  • Organizer: 日本地質学会第128年学術大会
• [Presentation] マントルかんらん岩の蛇紋岩化反応と磁鉄鉱の生成への温度、シリカの影響:海洋リソスフェアにおける水素の生成に関する提言 (2021)
  • Author(s): 菅沼悠介, 羽田裕貴, 板木拓也, 石輪健樹, 藤井昌和, 加藤悠爾, 大森貴之, 天野敦子, 岩井雅夫, 西田尚央, 草原和弥, 平野大輔, 関宰, 香月興太, 川又基人, 松井浩紀, 奥野淳一, 池原実, 三浦英樹
  • Organizer: 日本地質学会第128年学術大会
• [Presentation] Unveiling seafloor spreading mode and geodynamics in the Southeast Indian Ridge: New challenge in Japanese Antarctic Research Expedition (2021)
  • Author(s): Fujii M.
  • Organizer: The 12th Symposium on Polar Science
  • Int'l Joint Research
• [Presentation] Monitoring and assessing the permafrost coast retreat along the Kara Sea by integrating in situ measurements (2021)
  • Author(s): Arata Kioka, Vladislav Isaev, Pavel Kovov, Takeshi Tsuji, Stanislav Ogorodov, Masakazu Fujii, Osip Kokin Michail Tsarapov, Andrey Koshurnikov, Yaroslav Shevchuk
  • Organizer: The 12th Symposium on Polar Science
  • Int'l Joint Research
• [Presentation] On-shelf warm water circulation toward Totten Ice Shelf, East Antarctica (2021)
  • Author(s): Daisuke Hirano, Takeshi Tamura, Kazuya Kusahara, Masakazu Fujii, Kaihe Yamazaki, Yoshihiro Nakayama, Kazuya Ono, Takuya Itaki, Yuichi Aoyama, Daisuke Simizu, Kohei Mizobata, Kay I. Ohshima, Yoshifumi Nogi, Shigeru Aoki
  • Organizer: The 12th Symposium on Polar Science
  • Int'l Joint Research
• [Presentation] Investigation on the interactions between the downslope flow of Antarctic Bottom water and upslope flow of modified Circumpolar Deep Water using a high-resolution model (2021)
  • Author(s): Vigan Mensah, Yoshihiro Nakayama, Masakazu Fujii, Yoshifumi Nogi, Kay I Ohshima
  • Organizer: The 12th Symposium on Polar Science
  • Int'l Joint Research
• [Presentation] Melting and evolution of peridotites at the Mado Megamullion, an oceanic core complex in the Shikoku back-arc basin (2021)
  • Author(s): Atlanta Sen, Jonathan E Snow, Yasuhiko Ohara, Ken-ichi Hirauchi, Yui Kouketsu, Alessio Sanfilippo, Valentin Basch, Yumiko Harigane, Masakazu Fujii, Kyoko Okino, Norikatsu Akizawa
  • Organizer: American Geophysical Union 2021 Fall Meeting
  • Int'l Joint Research
• [Presentation] Estimating Vector magnetic anomalies around the East Scotia Ridge (2020)
  • Author(s): Yoshifumi Nogi
  • Organizer: The 11th Symposium on Polar Science
  • Int'l Joint Research
• [Presentation] New geophysical observation of circum-Antarctic mid-ocean ridges (2020)
  • Author(s): Fujii M., Okino K., Nogi Y
  • Organizer: The 11th Symposium on Polar Science
  • Int'l Joint Research
• [Presentation] Preliminary results of Japanese surveys on multibeam bathymetry off East Antarctic (2020)
  • Author(s): Fujii M., Nogi Y.
  • Organizer: The 11th Symposium on Polar Science
  • Int'l Joint Research
• [Presentation] Tectonics, magmatism, and hydrothermalism in Arctic Ocean floor (2020)
  • Author(s): Fujii M., Sato H., Sato T., Nogi Y
  • Organizer: The 11th Symposium on Polar Science
  • Int'l Joint Research
• [Presentation] Geology of the Conrad Rise: Summary of six cruises by R/V Hakuho-Maru (2020)
  • Author(s): Hiroshi Sato, Masakazu Fujii, Yuki Tokuda, Takuma Haga, Yukito Kurihara, Shungo Kawagata, Hiroki Matsui, Taichi Sato, Yoshifumi Nogi, Shiki Machida, Ryoko Senda, Christine Meyzen, Michael Bizimis, Hideo Ishizuka, Yukiko Kozaka
  • Organizer: The 11th Symposium on Polar Science
  • Int'l Joint Research
• [Presentation] フィリピン海プレート海盆群の誕生と成長 ―伊豆小笠原弧プレート沈み込み開始過程解明に向けて― (2020)
  • Author(s): 石塚治, 谷健一郎, 下田玄, 針金由美子, 佐藤太一, Taylor Rex, 海野進, 平天宇, 坂本泉, 横山由香, 内山涼多, 若 知晃, 鈴木愛実, 成田佳南, 小川知夏, 小原泰彦
  • Organizer: 海と地球のシンポジウム2020
• [Presentation] 中央海嶺プロセスの短期変動の観測 (2020)
  • Author(s): 藤井昌和，野木義史，沖野郷子，田村千織，山崎俊嗣，佐藤暢，高下裕晃，喜岡新，池原実, 大島慶一郎, 勝又勝郎
  • Organizer: 海と地球のシンポジウム2020
• [Presentation] 四国海盆海洋コアコンプレックスから明らかにする背弧海盆海洋地殻 (2020)
  • Author(s): 小原泰彦，沖野郷子，秋澤紀克，藤井昌和，針金由美子，平内家日，石塚治，町田嗣樹，道林克禎，sanifilippo Allessio, Sani Camilla, Basch Valentin, Snow Jonathan, Sen Atlanta, 谷健一郎，山下浩之
  • Organizer: 海と地球のシンポジウム2020
• [Presentation] Understanding the heterogenic magnetic properties of oceanic upper mantle and lower crustal materials (2020)
  • Author(s): Fujii M., X, Zhao,
  • Organizer: AGU Fall Meeting 2020
  • Int'l Joint Research
• [Presentation] Dense water production and downslope flow off Cape Darnley, Antarctica, reproduced by a realistic numerical model (2020)
  • Author(s): Mensah Vigan, Nakayama Yoshihiro, Fujii Masakazu, Ohshima Kay I
  • Organizer: AGU Fall Meeting 2020
  • Int'l Joint Research
• [Presentation] Crustal accretion in a slow-spreading back-arc basin: Insights from the Mado Megamullion oceanic core complex (Shikoku Basin, Philippine Sea) (2020)
  • Author(s): Valentin Basch, Alessio Sanfilippo, Camilla Sani, Yasuhiko Ohara, Jonathan E Snow, Osamu Ishizuka, Yumiko Harigane, Atlanta Sen, Okino Kyoko, Fujii Masakazu, Norikatsu Akizawa, Katsuyoshi Michibayashi, Hiroyuki Yamashita
  • Organizer: AGU Fall Meeting 2020
  • Int'l Joint Research
• [Presentation] Submarine canyons off Cape Darnley, East Antarctica (2020)
  • Author(s): Fujii M., Ikehara M., Sato H., Takehara K., Nogi Y.
  • Organizer: SCAR 2020
  • Int'l Joint Research
• [Presentation] Structure across the South Shetland Trench from the incoming plate to the back-arc basin (2020)
  • Author(s): 高下裕章，藤井昌和，周錦_, 沖野郷子，池原実，山口飛鳥，佐藤太一，
  • Organizer: JpGU-AGU Joint Meeting 2020
  • Int'l Joint Research
• [Presentation] Geophsyics in the R/V Hakuho-maru 2019-2020 expeditions around the world, 30th anniversary (2020)
  • Author(s): 藤井昌和，高下裕章、佐藤暢，沖野郷子，田村千織，周錦_、井上耕輔
  • Organizer: JpGU-AGU Joint Meeting 2020
  • Int'l Joint Research
• [Presentation] The last unknow pieces of the Proto-Philippine Sea Plate, Huatung Basin and Gagua Ridge (2020)
  • Author(s): 谷健一郎，石塚治，沖野郷子，植田勇人
  • Organizer: JpGU-AGU Joint Meeting 2020
  • Int'l Joint Research
• [Presentation] Geophysical analysis of the Yonaguni, Irabu and Tarama knolls (2020)
  • Author(s): 周錦_, 沖野郷子, 藤井昌和
  • Organizer: JpGU-AGU Joint Meeting 2020
  • Int'l Joint Research
• [Presentation] Geophysical and geological signatures of submarine canyons off Cape Darnley (2020)
  • Author(s): Fujii M., Ikehara M., Sato H., Takehara K., Itaki T., Nogi Y., Nakamura Y.
  • Organizer: JpGU-AGU Joint Meeting 2020
  • Int'l Joint Research
• [Presentation] Distribution of the volcanic rock around Kikai caldera submarine volcano, estimated from the geomagnetic anomalies (2020)
  • Author(s): Hanyu Tomoko, Sano Mamoru, Yamaguchi Hiroto, Shimizu Satoshi, Matsuno Tetsuo, Fujii Masakazu, Nogi Yoshifumi, Seama Nobukazu
  • Organizer: JpGU-AGU Joint Meeting 2020
  • Int'l Joint Research
• [Presentation] Dense water production and downslope flow off Cape Darnley reproduced by a realistic numerical model (2020)
  • Author(s): Vigan Mensah, Nakayama Yoshihiro, Fujii Masakazu, Nogi Yoshifumi, Ohshima Kay I.
  • Organizer: JpGU-AGU Joint Meeting 2020
  • Int'l Joint Research
• [Presentation] Shipboard Scientific Party of KH-20-1 cruise, Geological evidences for Cape Darnley Bottom Water in the Wild Canyon, Antarctica: Preliminary results of R/V Hakuho-maru KH-20-1 cruise (2020)
  • Author(s): Ikehara Minoru, Sato Hiroshi, Fujii Masakazu, Takehara Keiko, Ashida Masanari
  • Organizer: JpGU-AGU Joint Meeting 2020
  • Int'l Joint Research
• [Presentation] Oceanic lower crust and uppermost mantle of the Shikoku Basin: insights from expeditions to Mado Megamullion (2020)
  • Author(s): Ohara Yasuhiko, Okino Kyoko, Akizawa Norikatsu, Fujii Masakazu, Harigane Yumiko, Hirauchi Ken-ichi, shizuka Osamu I, Machida Shiki, Michibayashi Katsuyoshi, Sanfilippo Alessio, Sani Camilla, Snow E. Jonathan, Tani Kenichiro, Yamashita Hiroyuki
  • Organizer: JpGU-AGU Joint Meeting 2020
  • Int'l Joint Research
• [Presentation] Boulder, cobble, pebble, and granule of granitoid and metamorphic rocks from the Wild Canyon, off Cape Darnley, East Antarctica: Preliminary results of dredged samples during KH-20-1 cruise, R/V Hakuho-maru (2020)
  • Author(s): Sato Hiroshi, Fujii Masakazu, Ikehara Minoru, Takehara Keiko
  • Organizer: JpGU-AGU Joint Meeting 2020
  • Int'l Joint Research
• [Presentation] nderstanding the Heterogenic Magnetic Properties of Serpentinized Peridotites: Indication of Serpentinization Processes? (2020)
  • Author(s): Zhao Xiangyu, Fujii Masakazu, Oda Hirokuni, Zhao Xiang, Kanemaru Rei
  • Organizer: JpGU-AGU Joint Meeting 2020
  • Int'l Joint Research
• [Presentation] “On-land investigation of a sea-floor spreading in Ethiopia” Geo-electromagnetic research at the center of a divergent plate boundary in Afar depression, Ethiopia (2020)
  • Author(s): Ishikawa Naoto, Yoshimura Ryokei, Tesfaye Kidane Birke, Higashino Shin-ichiro, Kagashima Shin-ichi, Ameha A. Mulneh, Kitagawa Kirika, Mochizuki Nobutatsu, Fujii Masakazu, Kadoya Mamoru, Iwamoto Mitsuhiro, Obara Noriaki, Otofuji Yo-ichiro, Funaki Minoru, Kogiso Tetsu
  • Organizer: JpGU-AGU Joint Meeting 2020
  • Int'l Joint Research
• [Presentation] 地球物理データで見る南大洋の海洋底 (2020)
  • Author(s): 藤井昌和
  • Organizer: 若手研究者・学生を対象とした南大洋・南極研究集会
• [Presentation] 海底で採取した火成岩の磁気的研究：地殻とマントルの磁化構造をデータで描く (2020)
  • Author(s): 藤井昌和
  • Organizer: 令和元年度 高知大学海洋コア総合研究センター 共同利用・共同研究成果発表会
• [Presentation] Operation plan and design of the Antarctic exploration AUV "MONACA" (2019)
  • Author(s): Yamagata H., Maki T., Yoshida H., Nogi Y.
  • Organizer: 日本地球惑星連合2019年大会
  • Int'l Joint Research
• [Presentation] Submersible magnetics reveals relationship between off-axis volcanism and hydrothermal systems of the Kairei and Yokoniwa fields at the Central Indian Ridge (2019)
  • Author(s): Fujii M., Okino K.
  • Organizer: 日本地球惑星連合2019年大会
  • Int'l Joint Research
• [Presentation] Geophysical insights into tectonic, volcanic, sedimentation, and glacial processes in Indian and Southern Oceans: Preliminary geophysical results of R/V Hakuho-maru KH-19-1 cruise (2019)
  • Author(s): Fujii M., Sato H., Ikehara M,, Nogi Y., Sato T., Nakamura Y., Helen A. E., Sherriff-Tadano S.
  • Organizer: 日本地球惑星連合2019年大会
  • Int'l Joint Research
• [Presentation] Geological insights into formation of Conrad Rise, Southern Ocean: Preliminary geological results of R/V Hakuho-maru KH-19-1 cruise (2019)
  • Author(s): Sato H., Fujii M., Matsui H., Ikehara M.
  • Organizer: 日本地球惑星連合2019年大会
  • Int'l Joint Research
• [Presentation] Evolution of oceanic core complexes in the Shikoku Basin: when backarc basins cease to open (2019)
  • Author(s): Okino K., Ohara Y,, Fujii M., Hanyu T.
  • Organizer: 日本地球惑星連合2019年大会
  • Int'l Joint Research
• [Presentation] Understanding of whole history of Antarctic ice sheet, sea ice, and bottom water based on core-seismic integrated investigation from Antarctic continental shelf to deep sea floor (2019)
  • Author(s): Ikehara M., Fujii M., Itaki T.
  • Organizer: 日本地球惑星連合2019年大会
  • Int'l Joint Research
• [Presentation] Scientific Party of R/V Hakuho-maru KH-19-1 cruise, Integrated observations for marine earth science in the Indian sector of the Southern Ocean: Preliminary results of R/V Hakuho-maru KH-19-1 cruise (2019)
  • Author(s): Ikehara M., Ohshima K. I., Itaki T., Sato H., Fujii M., Yamamoto-Kawai M., Matsui H., Ikenoue T.
  • Organizer: 日本地球惑星連合2019年大会
  • Int'l Joint Research
• [Presentation] Introducing an oceanic core complex in the Shikoku Basin: Mado (2019)
  • Author(s): Ohara Y., Okino K., Akizawa N., Fujii M., Harigane Y., Hirano N., Hirauchi K., Ishizuka O., Machida S., Michibayashi K., Sanfilippo A., Snow J. E., Yamashita H.
  • Organizer: 日本地球惑星連合2019年大会
  • Int'l Joint Research
• [Presentation] Reconstruction of the East Antarctic ice sheet variability during the last 3 myrs in the central & eastern Droning Maud Land, East Antarctica (2019)
  • Author(s): Suganuma Y., Kawamata M., Katsuki K., Kanamaru T., Kaneda H., Koyama T., Tanabe Y., Shibata D., Ishiwa T., Itaki T., Okuno J., Seki O., Suto I., Fujii M., Miura H.
  • Organizer: 日本地球惑星連合2019年大会
  • Int'l Joint Research
• [Presentation] Geo-electromagnetic research at a spreading center of a divergent plate boundary in Afar depression (2019)
  • Author(s): Ishikawa N., Yoshimura R., Kidane T., Higashino S., Kagashima S., Mochizuki N., Muluneh A. A., Kitagawa K., Kadoya M., Obara N., Otofuji Y., Funaki M., Kogiso T., Fujii M.
  • Organizer: 日本地球惑星連合2019年大会
  • Int'l Joint Research
• [Presentation] 氷床変動に起因する海水準上昇予測 －無人・遠隔技術を活用した極域研究拠点形成－ (2019)
  • Author(s): 田村岳史, 奥野淳一, 菅沼悠介, 末吉哲雄, 野木義史, 中村卓司
  • Organizer: 日本地球惑星連合2019年大会
  • Int'l Joint Research
• [Presentation] 極域科学の新展開：氷床変動に起因する海水準上昇予測のための拠点観測, (2019)
  • Author(s): 中村卓司, 杉山慎, 阿部彩子, 青木輝夫, 野木義史, 田村岳史
  • Organizer: 日本地球惑星連合2019年大会
  • Int'l Joint Research
• [Presentation] The origins of southern part of Madagascar Plateau and Del Cano Rise, based on re-estimated seafloor spreading history of Southwest Indian ridge 35°E to 55°E (2019)
  • Author(s): Sato, T., Y. Nogi, H. Sato, Fujii . M.
  • Organizer: International Symposium on Antarctic Earth Sciences (ISAES) 2019
  • Int'l Joint Research
• [Presentation] Hardware Design of Variable and Compact AUV “MONACA” for Under-Ice Survey of Antarctica (2019)
  • Author(s): Yamagata H., Maki T., Yoshida H., Nogi Y.
  • Organizer: IEEE OES Underwater Technology 2019
  • Int'l Joint Research
• [Presentation] 南極リュツォ・ホルム湾における海洋-氷床相互作用に関する数値モデリング (2019)
  • Author(s): 草原和弥, 平野大輔, 藤井昌和, Alexander Fraser, 田村岳史
  • Organizer: 2019年度日本海洋学会秋季大会
• [Presentation] 南極海探査を目的としたAUV“MONACA”の設計と運用計画 (2019)
  • Author(s): 山縣広和, 巻俊宏, 吉田弘, 野木義史
  • Organizer: ロボティクス・メカトロニクス講演会
• [Presentation] 南大洋の海底地形観測の現状と展望 ～音で見える景色が生む疑問と制約～ (2019)
  • Author(s): 藤井昌和
  • Organizer: 南極氷床・海氷・海洋システムの研究に関する今後 10 年を見据えた将来構想
• [Presentation] 南大洋航海における地球物理観測の概要：大陸分裂と海底拡大から1歩先へ (2019)
  • Author(s): 藤井昌和,野木義史,佐藤暢,中村恭之,佐藤太一,沖野郷子,田村千織,喜岡新
  • Organizer: 白鳳丸30周年記念世界一周航海（HEAW30） へ向けた研究戦略会
• [Presentation] Understanding Circum-Antarctic Ridges: Magnetic insights into off-axis volcanism and hydrothermal systems near the Rodrigues Triple Junction (2018)
  • Author(s): Fujii M., K. Okino
  • Organizer: The Ninth Symposium on Polar Science
  • Int'l Joint Research
• [Presentation] Possible fossil ridge and seafloor evolution between the Conrad Rise and the Del Cano Rise in the Southern Indian Ocean (2018)
  • Author(s): Sato, T., Y. Nogi, M. Fujii, H. Sato
  • Organizer: The Ninth Symposium on Polar Science
  • Int'l Joint Research
• [Presentation] Near-seafloor magnetics of off-axis volcanism near the Kairei and Yokoniwa hydrothermal fields of the Central Indian Ridge (2018)
  • Author(s): Fujii M., K. Okino
  • Organizer: American Geophysical Union 2018 Fall Meeting
  • Int'l Joint Research
• [Presentation] Geophysical constraints on the submarine volcanic activity around a hydrothermal area in the Mid-Okinawa Trough (2018)
  • Author(s): Kitada, K., T. Kasaya, H. Iwamoto,Y. Nogi
  • Organizer: American Geophysical Union 2018 Fall Meeting
  • Int'l Joint Research
• [Presentation] Possible extinct ridge between the Conrad Rise and the Del Cano Rise in the Southern Indian Ocean. (2018)
  • Author(s): Nogi, Y., T. Sato, M. Fujii, H. Sato
  • Organizer: American Geophysical Union 2018 Fall Meeting
  • Int'l Joint Research
• [Presentation] Rock magnetism for characterization of submarine volcanism in the Okinawa Trough (2018)
  • Author(s): Fujii M., H. Sato, T. Nozaki, Y. Takaya
  • Organizer: 日本地球惑星連合2018年大会
  • Int'l Joint Research
• [Presentation] Do submarine volcanism in mid-ocean ridges impact global climate change? _Constraints from topographic observation in precisely aged seafloor (2018)
  • Author(s): Fujii M., A. Kioka, T. Yamazaki, K. Okino, C. Tamura, O. Seki, Y. Nogi, J. Okuno, T. Ishiwa, I. Oyabu
  • Organizer: 日本地球惑星連合2018年大会
  • Int'l Joint Research
• [Presentation] Chih-Chieh Su, Ho-Han Hsu, Jih-Hsin Chang, 宇野芳江，増田夏美，久米島北方・西方海域のテクトニクス：新青丸KS-17-14航海速報 (2018)
  • Author(s): 沖野郷子，藤井昌和，新城竜一，岡村慶，野口拓郎，田村千織
  • Organizer: 日本地球惑星連合2018年大会
  • Int'l Joint Research
• [Presentation] 背弧海盆の非対称性を説明する仮説：南マリアナトラフでの観測事実と数値シミュレーション (2018)
  • Author(s): 島伸和，中久喜伴益，松野哲男，沖野郷
  • Organizer: 日本地球惑星連合2018年大会
  • Int'l Joint Research
• [Presentation] 南極海未探査領域への挑戦 (2018)
  • Author(s): 野木 義史, 青木 茂, 吉田 弘, 巻 俊宏, 沖野 郷子, 青山 雄一, 田村 岳史, 末吉 哲雄
  • Organizer: 日本地球惑星連合2018年大会
  • Int'l Joint Research
• [Presentation] Seafloor spreading history of the Cosmonauts Sea, off East Antarctica (2018)
  • Author(s): 羽入朋子, 野木義史, 藤井昌和
  • Organizer: 日本地球惑星連合2018年大会
  • Int'l Joint Research
• [Presentation] 地磁気全磁力データに基づくチリ三重点での沈み込みつつある拡大海嶺の火山活動の変遷 (2018)
  • Author(s): 松本剛, 石原隆仙, 野木義史
  • Organizer: 日本地球惑星連合2018年大会
  • Int'l Joint Research
• [Presentation] 高密度重磁力探査による中部沖縄トラフ久米島沖の海底火成活動の特徴 (2018)
  • Author(s): 北田数也, 笠谷貴史, 岩本久則, 野木義史
  • Organizer: 日本地球惑星連合2018年大会
  • Int'l Joint Research
• [Presentation] 大型研究計画「極域科学のフロンティア」の改定にむけて：マスタープラン大改訂にどう対応するか (2018)
  • Author(s): 中村卓司, 杉本敦子, 杉山慎, 野木義史, 末吉哲雄
  • Organizer: 日本地球惑星連合2018年大会
  • Int'l Joint Research
• [Presentation] 南北両極の将来研究の策定に向けて (2018)
  • Author(s): 野木義史, 末吉哲雄, 中村卓司, 杉本敦子, 杉山慎
  • Organizer: 日本地球惑星連合2018年大会
  • Int'l Joint Research
• [Presentation] 四国海盆海洋コアコンプレックスの形成-YK18-07, KH-18-02 (2018)
  • Author(s): 沖野郷子，小原泰彦，道林克禎，町田嗣樹，針金由美子，秋澤紀克，藤井昌和，Nguen Khac Du, 柿畑優季，安藤宏太，周錦_，羽入朋子
  • Organizer: ブルーアースサイエンス・テク2019
• [Presentation] 地磁気3成分異常から推定される四国海盆の海底拡大史 (2018)
  • Author(s): 羽入朋子, 沖野郷子
  • Organizer: 地球電磁気・地球惑星圏学会第144回総会講演会
• [Presentation] 南部マリアナ背弧拡大海嶺下の上部マントル比抵抗構造の解明 (2018)
  • Author(s): 松野哲男，島伸和，新藤悠，野木義史，沖野郷子
  • Organizer: 地球電磁気・地球惑星圏学会第144回総会講演会
• [Presentation] Submersible Magnetics for Understanding Off-axis Volcanism of Central Indian Ridge (2018)
  • Author(s): Fujii M., K. Okino
  • Organizer: 地球電磁気・地球惑星圏学会第144回総会講演会