Super-resolution imaging for understanding hierarchical structures produced by water-rock reactions and mass transfer

• Project/Area Number: 18K18778
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 17:Earth and planetary science and related fields
• Research Institution: Tohoku University
• Principal Investigator: Okamoto Atsushi 東北大学, 環境科学研究科, 准教授 (40422092)
• Co-Investigator(Kenkyū-buntansha): 大森 敏明 神戸大学, 工学研究科, 准教授 (10391898)
• Project Period (FY): 2018-06-29 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000); Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2018: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
• Keywords: X線CT / スパース超解像 / 掘削コア / 岩石組織 / 蛇紋岩化作用 / オマーン掘削プロジェクト / 岩石ー水相互作用 / 蛇紋岩 / マグネタイト / 段階的超解像 / 岩石―水相互作用 / オマーンオフィオライト / 機械学習 / 超解像 / 水熱実験

Outline of Final Research Achievements

bbbX-ray tomography (CT) is a non-destructive method for investigating three-dimensional structures. In recent years, this method has been widely applied to rock drill core samples. However, when imaging a wide area, there is a problem that the resolution is not enough for analyzing microstructure of rocks. In this research, I challenged to develop a new method of decoding rock textures that connects micro and macro, based on "sparse super-resolution technology". The analyzed sample was a serpentinized peridotite taken from the Oman Drilling Project, and the same part of the rock core was imaged at different resolutions. By sparse super-resolution, a small number of characteristic (sparse) basis images were extracted, and high-performance super-resolution was successful compared to conventional interpolation methods. Furthermore, it was found that stepwise super-resolution is effective when there is a large difference in resolution.

Academic Significance and Societal Importance of the Research Achievements

地球内部では、鉱物からプレートまで様々なスケールの現象が連動して起こっている。近年、分析・解析装置は飛躍的に向上たものの、異なるスケールの間を結びつけることは未だにできていない。本研究では、X線CTという岩石・地質試料の普遍的に使われる分析方法に、スパース超解像という機械学習技術の１つを適用して岩石組織解読の方法論を提案したものであり、この「スケールの壁」を打破すること第一歩になったと考えられる。

Research Products

• [Journal Article] Impact of fluid pressure on failure mode in shear zones: Numerical simulation of en-echelon tensile fracturing and transition to shear (2020)
  • Author(s): Okamoto Atsushi、Fuse Kazumasa、Shimizu Hiroyuki、Ito Takatoshi
  • Journal Title: Tectonophysics Volume: 774 Pages: 228277-228277
  • DOI: 10.1016/j.tecto.2019.228277
  • Peer Reviewed
• [Journal Article] Silica controls on hydration kinetics during serpentinization of olivine: Insights from hydrothermal experiments and a reactive transport model (2020)
  • Author(s): Oyanagi Ryosuke、Okamoto Atsushi、Tsuchiya Noriyoshi
  • Journal Title: Geochimica et Cosmochimica Acta Volume: 270 Pages: 21-42
  • DOI: 10.1016/j.gca.2019.11.017
  • Peer Reviewed
• [Journal Article] Stabilizing and enhancing permeability for sustainable and profitable energy extraction from superhot geothermal environments (2020)
  • Author(s): N. Watanabe, K. Saito, A. Okamoto, K. Nakamura, T. Ishibashi, H. Saishu, T. Komai, N. Tsuchiya
  • Journal Title: Applied Energy Volume: 260 Pages: 114306-114306
  • DOI: 10.1016/j.apenergy.2019.114306
  • Peer Reviewed
• [Journal Article] Crystallographic preferred orientation of talc determined by an improved EBSD procedure for sheet silicates: Implications for anisotropy at the slab-mantle interface due to Si-metasomatism (2020)
  • Author(s): Takayoshi Nagaya, Atsushi Okamoto, Ryosuke Oyanagi, Yusuke Seto, Akira Miyake, Masaoki Uno, Jun Muto, Simon R. Wallis
  • Journal Title: American Mineralogist Volume: in press Issue: 6 Pages: 873-893
  • DOI: 10.2138/am-2020-7006
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Characteristics of hydrogen production with carbon storage by CO2-rich hydrothermal alteration of olivine in the presence of Mg?Al spinel (2020)
  • Author(s): Wang Jiajie、Watanabe Noriaki、Okamoto Atsushi、Nakamura Kengo、Komai Takeshi
  • Journal Title: International Journal of Hydrogen Energy Volume: in press Issue: 24 Pages: 13163-13175
  • DOI: 10.1016/j.ijhydene.2020.03.032
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Acceleration of hydrogen production during water-olivine-CO2 reactions via high-temperature-facilitated Fe(II) release (2019)
  • Author(s): Wang Jiajie、Watanabe Noriaki、Okamoto Atsushi、Nakamura Kengo、Komai Takeshi
  • Journal Title: International Journal of Hydrogen Energy Volume: 23 Issue: 23 Pages: 11514-11524
  • DOI: 10.1016/j.ijhydene.2019.03.119
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Enhanced hydrogen production with carbon storage by olivine alteration in CO2-rich hydrothermal environments (2019)
  • Author(s): Wang Jiajie、Watanabe Noriaki、Okamoto Atsushi、Nakamura Kengo、Komai Takeshi
  • Journal Title: Journal of CO2 Utilization Volume: 30 Pages: 205-213
  • DOI: 10.1016/j.jcou.2019.02.008
  • Peer Reviewed
• [Journal Article] Recovering the past history of natural recording media by Bayesian inversion (2018)
  • Author(s): Kuwatani T, Nagao H, Ito SI, Okamoto A, Yoshida K Okudaira T
  • Journal Title: Physical Review E Volume: 98 Issue: 4 Pages: 043311-043311
  • DOI: 10.1103/physreve.98.043311
  • Peer Reviewed / Open Access
• [Journal Article] Multiple Kinetic Parameterization in a Reactive Transport Model Using the Exchange Monte Carlo Method (2018)
  • Author(s): Oyanagi Ryosuke、Okamoto Atsushi、Tsuchiya Noriyoshi
  • Journal Title: Minerals Volume: 8 Issue: 12 Pages: 579-579
  • DOI: 10.3390/min8120579
  • Peer Reviewed / Open Access
• [Journal Article] Drone brings new advance of geological mapping in Mongolia: Opportunities and challenges (2018)
  • Author(s): Dandar Otgonbayar、Okamoto Atsushi、Uno Masaoki、Batsaikhan Undarmaa、Ulziiburen Burenjargal、Tsuchiya Noriyoshi
  • Journal Title: Mongolian Geoscientist Volume: - Issue: 47 Pages: 53-57
  • DOI: 10.5564/mgs.v0i47.1063
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Formation of fracture network and permeability enhancement during olivine hydration within oceanic lower crust (2020)
  • Author(s): Kazuki Yoshida, Atsushi Okamoto, Ryosuke Oyanagi, Hiroyuki Shimizu, Noriyoshi Tsuchiya
  • Organizer: International Conference on Ophiolites and the Oceanic Lithosphere
  • Int'l Joint Research
• [Presentation] Super-resolution of X-ray CT images of rock core samples by sparse representation : methodology and applications to serpetinized peridotite from CM1A (2020)
  • Author(s): "Atsushi Okamoto, Toshiaki Omori, Masao Kimura, Katsuyoshi Michibayashi Oman Drilling Project Phase 2 Science Party "
  • Organizer: International Conference on Ophiolites and the Oceanic Lithosphere
  • Int'l Joint Research
• [Presentation] Hydration and development of fracture network within oceanic lower crust: an evidence from CM1A of Oman Drilling (2019)
  • Author(s): Atsushi Okamoto, Kazuki Yoshida, Ryosuke Oyanagi, Oman Drilling Project Phase 2 Science Party
  • Organizer: 日本地球惑星科学連合大会2019年大会
  • Invited
• [Presentation] 岩石ー水相互作用によるマルチスケール構造の理解のためのコア試料のX線CT画像の超解像 (2019)
  • Author(s): 大森敏明、岡本敦、道林克禎, Oman Drilling Project Phase 2 Science Party
  • Organizer: 日本地球惑星科学連合大会2019年大会
• [Presentation] 蛇紋岩体中のドロマイトー滑石脈の形成と泥質片岩境界との反応帯：三波川帯関東山地長瀞の例 (2019)
  • Author(s): 岡本 敦・大柳 良介・吉田 一貴・サティシュ クマール・宇野 正起
  • Organizer: 日本地質学会2019年山口大会
• [Presentation] オマーンオフィオライトの層状斑れい岩の加水反応とき裂形成シミュレーション (2019)
  • Author(s): 吉田一貴・岡本敦・清水浩之・土屋範芳
  • Organizer: 東京大学大気海洋研究所共同研究集会
• [Presentation] Porosity generation during feldspar replacement as the mark of potassium-rich supercritical fluids on the top of granitic intrusion (2019)
  • Author(s): A. Nurdiana, A. Okamoto, M. Uno, K. Yoshida, N. Tsuchiya
  • Organizer: 日本地球惑星科学連合大会2019年大会
• [Presentation] 反応誘起応力による地殻応力発生と浸透率発展：MgO-H2O系での測定 (2019)
  • Author(s): 宇野 正起，笠原 久夢，岡本 敦，土屋 範芳
  • Organizer: 日本地球惑星科学連合大会2019年大会
• [Presentation] シリカ粒子と流体圧振動 (2019)
  • Author(s): 岡本 敦
  • Organizer: 変成岩などシンポジウム2019、蒲郡
• [Presentation] NaHCO3-promoted olivine weathering with H2 generation and CO2 sequestration in alkaline hydrothermal system (2019)
  • Author(s): Jiajie Wang, Kengo Nakamura, Noriaki Watanabe, Atsushi Okamoto, Takeshi Komai
  • Organizer: 9th International Conference on Future Environment and Energy
  • Int'l Joint Research
• [Presentation] Hydrothermal experiments on supercritical water-rock interaction: thermodynamic data and silica (2019)
  • Author(s): Atsushi Okamoto
  • Organizer: 16th international symposium on Water Dynamics, March 12, Sendai
  • Int'l Joint Research / Invited
• [Presentation] Formation of secondary olivine after orthopyroxene induced by highly oxidizing fluid in the mantle wedge: An evidence from the Khantaishir Ophiolite, western Mongolia (2019)
  • Author(s): Otgonbayar Dandar, Atsushi Okamoto, Masaoki Uno, Noriyoshi Tsuchiya
  • Organizer: JSPS-DST Japan-India Forum for Advanced Study, Niigata
  • Int'l Joint Research
• [Presentation] Formation of Pseudomorphs after Orthopyroxene during serpentinization and Ca-metasomatism of mantle wedge (the Alag Khadny accretionary wedge, the Chandman area, western Mongolia (2019)
  • Author(s): Otgonbayar Dandar, Atsushi Okamoto, Masaoki Uno, Noriyoshi Tsuchiya
  • Organizer: 16th international symposium on Water Dynamics, March 12, Sendai
  • Int'l Joint Research
• [Presentation] Pore network of feldspar replacement as the mark of potassium-rich supercritical fluids on the top of granitic intrusion (2019)
  • Author(s): A. Nurdiana, A. Okamoto, M. Uno, N. Tsuchiya
  • Organizer: 16th international symposium on Water Dynamics, March 12, Sendai
  • Int'l Joint Research
• [Presentation] CO2リッチ水熱環境における橄欖石の加速風化を用いた水素生成と炭素固定 (2018)
  • Author(s): Jiajie Wang, Noriaki Watanabe, Kengo Nakamura, Atsushi Okamoto, Takeshi Komai
  • Organizer: 日本地熱学会平成30年学術講演会（東京大会）
• [Presentation] 数値シミュレーションと組み合わせた構造解析による蛇紋岩の形成メカニズム推定 (2018)
  • Author(s): 宮澤美幸, 鈴木杏奈, 岡本敦, 清水浩之, 大林一平, 平岡裕章, 伊藤高敏
  • Organizer: 日本地質学会第125年学術大会（2018つくば特別大会）
• [Presentation] アモルファスシリカの亜臨界・超臨界環境における相変化の速度論的検討 (2018)
  • Author(s): 新部 貴理, 岡本 敦, 天谷 宇志, 土屋 範芳
  • Organizer: 日本鉱物科学会2018年年会
• [Presentation] 海洋底蛇紋岩作用におけるSi交代作用の律速過程 (2018)
  • Author(s): 大柳 良介、岡本 敦、土屋 範芳
  • Organizer: 日本地質学会第125年学術大会
• [Presentation] Ca-metasomatism of the Mantle: an example from the Khantaishir ophiolite in the chandman area, western Mongolia (2018)
  • Author(s): Otgonbayar Dandar, Atsushi Okamoto, Masaoki Uno, Noriyoshi Tsuchiya
  • Organizer: 日本鉱物科学会2018年年会
• [Presentation] 吸水反応における反応誘起応力の反応速度・変形速度依存性：MgO- H2O系における実験的研究 (2018)
  • Author(s): 笠原 久夢, 宇野 正起, 岡本 敦, 土屋 範芳
  • Organizer: 日本鉱物科学会2018年年会
• [Presentation] 350-450℃水熱反応によるアパタイト中のハロゲン置換反応実験 (2018)
  • Author(s): 杉沢 直樹, 東野 文子, 宇野 正起, 岡本 敦, 土屋 範芳
  • Organizer: 日本鉱物科学会2018年年会
• [Presentation] 東南極セールロンダーネ山地，グラニュライト・角閃岩相反応帯における多元微量元素解析による含Cl流体の浸透の時間スケール (2018)
  • Author(s): ミンダリョワ ディアナ, 宇野 正起, 東野 文子, 岡本 敦, 土屋 範芳
  • Organizer: 日本鉱物科学会2018年年会
• [Presentation] Analysis of rock fracture pattern and fluid flow by persistent homology (2018)
  • Author(s): M. Miyazawa, A. Suzuki, A. Okamoto, H. Shimizu, I. Obayashi, and T. Ito
  • Organizer: The 15th International Conference of Flow Dynamics, Sendai, Japan
  • Int'l Joint Research
• [Presentation] Hydrothermal experiments on olivine-quartz-seawater system at 300° C: implication for the progress of silica-metasomatism during serpentinization at the crust-mantle boundary in the oceanic lithosphere (2018)
  • Author(s): Oyanagi, R., A. Okamoto, and N. Tsuchiya
  • Organizer: American Geophysics Union, Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Hydrothermal Alteration of the Crust-Mantle Transition and Upper Mantle in the Samail Ophiolite: Insights from Holes CM1A and CM2B of the Oman Drilling Project (2018)
  • Author(s): Frueh-Green, G. L., Grabowska, M., Oyanagi, R., Kimura, K., Klein, F., Okamoto, A., Morishita, T., Warsi, N., Tamura, A., Teagle, D.A.H., Takazawa, E., Coogan, J.A.., Kelemen, P.B., Matter, J.M., the OmanDP Phase 2 Science Party
  • Organizer: American Geophysics Union, Fall Meeting 2018
  • Int'l Joint Research
• [Presentation] Simultaneous H2 production with carbon storage by enhanced olivine weathering in laboratory-scale: An investigation of CO2 effect (2018)
  • Author(s): Jiajie Wang, Kengo Nakamura, Noriaki Watanabe, Atsushi Okamoto and Takeshi Komai
  • Organizer: The Second International Conference on Materials Chemistry and Environmental Protection. Oral, Sanya (China),
  • Int'l Joint Research