A structural petrological study of the subduction boundary: the example of the Sanbagawa belt in SW Japan

• Project/Area Number: 24244079
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Geology
• Research Institution: Nagoya University
• Principal Investigator: Wallis Simon 名古屋大学, 環境学研究科, 教授 (30263065)
• Co-Investigator(Kenkyū-buntansha): ENAMI Masaki 名古屋大学, 年代測定総合研究センター, 教授 (20168793) ; MIZUKAMI Tomoyuki 金沢大学, 自然システム系, 助教 (80396811) ; AOYA Mutsuki 徳島大学, 大学院ソシオ・アーツ・アンド・サイエンス研究部, 准教授 (90415638)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥43,030,000 (Direct Cost: ¥33,100,000、Indirect Cost: ¥9,930,000); Fiscal Year 2014: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000); Fiscal Year 2013: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000); Fiscal Year 2012: ¥36,530,000 (Direct Cost: ¥28,100,000、Indirect Cost: ¥8,430,000)
• Keywords: Sanbagawa / Mantle wedge / Subduction boundary / brucite / EBSD / アンチゴライト / かんらん石 / マントルウェッジ / 三波川変成帯 / ウェッジマントル / 蛇紋岩 / マントル / 結晶選択配向 / 沈み込み帯 / マントルとスラブ結合

Outline of Final Research Achievements

Deformation of mantle rocks at depths of several 10s km in subduction zones is thought to be responsible for inducing large scale mantle convection. It is not possible to study such regions directly. However, it is possible to gather valuable information on these domains by studying geological units that were once part of the subduction boundary region and have since been brought to the earth's surface by tectonic movements. Particularly clear examples of this are the mantle units of the Sanbagawa belt. Structural petrological studies reveal the former widespread presence of brucite. The presence of brucite in the mantle i) causes a drastic weakening and will likely strongly affect the depth of coupling between the mantle and slab; and ii) controls the hydration dehydration reactions and hence fluid pressure.

Research Products

• [Journal Article] Deformation microstructures of glaucophane and lawsonite in experimentally deformed blueschists: Implications for intermediate-depth intraplate earthquakes (2015)
  • Author(s): Kim, D., Katayama, I., Wallis, S., Michibayashi, K., Miyake, A. & Seto, Y.
  • Journal Title: Journal of Geophysical Research Volume: 120 Issue: 2 Pages: 1229-1242
  • DOI: 10.1002/2014jb011528
  • Peer Reviewed / Open Access
• [Journal Article] Reply to comment by Nozaka (2014) on "Dehydration breakdown of antigorite and the formation of B-type olivine CPO" (2014)
  • Author(s): Takayoshi Nagaya, Simon R. Wallis, Hiroaki Kobayashi, Katsuyoshi Michibayashi, Tomoyuki Mizukami, Yusuke Seto, Akira Miyake, Megumi Matsumoto
  • Journal Title: Earth and Planetary Science Letters Volume: 408 Pages: 406-407
  • DOI: 10.1016/j.epsl.2014.10.026
  • Peer Reviewed
• [Journal Article] Two types of antigorite serpentinite controlling heterogeneous slow-slip behaviours of slab–mantle interface (2014)
  • Author(s): Tomoyuki Mizukami, Hironori Yokoyama, Yoshihiro Hiramatsu, Shoji Arai, Hirokazu Kawahara, Takayoshi Nagaya, Simon R. Wallis
  • Journal Title: Earth and Planetary Science Letters Volume: 401 Pages: 148-158
  • DOI: 10.1016/j.epsl.2014.06.009
  • Peer Reviewed
• [Journal Article] Dehydration breakdown of antigorite and the formation of B-type olivine CPO (2014)
  • Author(s): Takayoshi Nagaya, Simon R. Wallis, Hiroaki Kobayashi, Katsuyoshi Michibayashi, Tomoyuki Mizukami, Yusuke Seto, Akira Miyake, Megumi Matsumoto
  • Journal Title: Earth and Planetary Science Letters Volume: 387 Pages: 67-76
  • DOI: 10.1016/j.epsl.2013.11.025
  • Peer Reviewed
• [Journal Article] Paleo-mantle wedge preserved in the Sambagawa high-pressure metamorphic belt and the thickness of forearc continental crust (2013)
  • Author(s): Aoya, M., Endo, S., Mizukami, T. and Wallis, S. R.
  • Journal Title: Geology Volume: 41 Issue: 4 Pages: 451-454
  • DOI: 10.1130/g33834.1
  • Peer Reviewed
• [Journal Article] High-pressure garnet amphibolite from the Funaokayama unit, western Kii Peninsula and the extent of eclogite facies metamorphism in the Sanbagawa belt (2013)
  • Author(s): Shunsuke ENDO, Izabella NOWAK, Simon R. WALLIS
  • Journal Title: Journal of Mineralogical and Petrological Sciences Volume: 108 Pages: 189-200
• [Journal Article] Slow subduction and buoyant exhumation of the Sanbagawa eclogite (2012)
  • Author(s): Endo, S., Wallis, S., Tsuboi, M., Aoya, M. and Uehara, S.
  • Journal Title: Lithos Volume: 146 Pages: 183-201
  • DOI: 10.1016/j.lithos.2012.05.010
  • Peer Reviewed
• [Journal Article] Retrograde strontium metasomatism in serpentinite melange of the Kurosegawa Zone in central Kyushu (2012)
  • Author(s): Miyazoe, T., Enami, M., Nishiyama, T., Mori, Y.
  • Journal Title: Mineralogical Magazine Volume: 76 Issue: 3 Pages: 635-647
  • DOI: 10.1180/minmag.2012.076.3.14
  • Peer Reviewed
• [Presentation] 測定方法の違いがantigorite CPOに与える影響 (2015)
  • Author(s): 永冶 方敬, ウォリス サイモン, 曽田 祐介, 上原 誠一郎
  • Organizer: 変成岩などシンポジウム2015
  • Place of Presentation: シーパル須磨 神戸市立国民宿舎須磨荘
  • Year and Date: 2015-03-14 – 2015-03-16
• [Presentation] 浅部ウェッジマントル―スラブ間での物質循環の解明に向けて～高知県白髪山岩体を例に～ (2015)
  • Author(s): 河原 弘和, 永冶 方敬, 森 宏, ウォリス サイモン
  • Organizer: 日本地質学会 121 年学術大会
  • Place of Presentation: 鹿児島大学
  • Year and Date: 2015-03-14 – 2015-03-16
• [Presentation] 浅部ウェッジマントルにおけるbrucite-antigorite serpentiniteの重要性 (2015)
  • Author(s): 河原 弘和, 遠藤 俊佑, ウォリス サイモン, 永冶 方敬, 森 宏, 山本 綱志, 淺原 良浩
  • Organizer: 変成岩などシンポジウム2015
  • Place of Presentation: シーパル須磨 神戸市立国民宿舎須磨荘
  • Year and Date: 2015-03-14 – 2015-03-16
• [Presentation] 地震波経路を利用したS波偏向異方性モデリングによるウェッジマントル内のアンチゴライトの分布範囲と含有率の推定法の開発 (2014)
  • Author(s): 永冶 方敬, ウォーカー アンドリュー, ウッキー ジェームズ, ケンダル マイケル, ウォリス サイモン
  • Organizer: 日本地震学会 秋季大会
  • Place of Presentation: 朱鷺メッセ 新潟コンベンションセンター
  • Year and Date: 2014-11-24 – 2014-11-25
• [Presentation] Slab-wedge mantle boundary preserved in the Sanbagawa belt, SW Japan (2014)
  • Author(s): WALLIS, Simon, MORI, Hiroshi, NAGAYA, Takayoshi
  • Organizer: JpGU 2014
  • Place of Presentation: 横浜パンパシフィコ
  • Year and Date: 2014-04-28
• [Presentation] 沈み込み帯の深さ80kmにおけるスラブーマントル結合の重要性
  • Author(s): ウォリス サイモン
  • Organizer: 日本地球惑星科学連合
  • Place of Presentation: 幕張メッセ
• [Presentation] スラブ‐マントルウェッジ境界における二段階の斜方輝岩形成
  • Author(s): 遠藤 俊祐 水上知行 ウォリス サイモン ほか
  • Organizer: 日本地球惑星科学連合
  • Place of Presentation: 幕張メッセ
• [Presentation] 収束プレート境界におけるs-波スプリッティングのモデリング：アンチゴライトとかんらん石のCPOファブリックの分布
  • Author(s): 永冶 方敬 ワーカー アンドリュー ウーキー ジェームズ Wallis他
  • Organizer: 日本地球惑星科学連合
  • Place of Presentation: 幕張メッセ
• [Presentation] Dating and tectonic significance of E-W extension in southern Tibet
  • Author(s): Simon Wallis
  • Organizer: Geological Society of Korea annual meeting
  • Place of Presentation: Jeju Island
  • Invited
• [Presentation] The distribution of antigorite and the mantle flow in the wedge mantle investigated by the shear wave splitting modeling
  • Author(s): Takayoshi NAGAYA, Andrew M. WALKER, James M. WOOKEY, Michael J. KENDALL, Simon R. WALLIS
  • Organizer: 日本地質学会
  • Place of Presentation: 仙台
• [Presentation] ラマンスペクトルから推察される炭質物の低温から高温変成作用に伴う構造変化
  • Author(s): 纐纈 佑衣, 水上 知行, 森 宏, 遠藤俊祐, 青矢睦月, 原英俊, 中村大輔, Wallis Simon
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ
• [Presentation] グァテマラ・北部モタグア断層帯のテクトニックブロックの二回の沈み込み‐上昇サイクル
  • Author(s): Shunsuke ENDO, Simon R. WALLIS, Luigi A. SOLARI
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ
• [Presentation] antigoriteの脱水分解とB-タイプolivine CPOの形成
  • Author(s): T. Nagaya, S. Wallis, T. Mizukami, K. Michibayashi
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ
• [Presentation] Topotaxial growth of olivine and the formation of b-type CPO
  • Author(s): S. Wallis, T. Nagaya, T. Mizukami , K. Michibayashi
  • Organizer: 34th International Geological Congress
  • Place of Presentation: Brisbane
• [Presentation] 非変形olivineのCPOの形成メカニズム
  • Author(s): 永冶方敬 S. Wallis 小林広明 道林克禎 水上知行
  • Organizer: 日本地質学会2012体会
  • Place of Presentation: 大阪
• [Presentation] 炭質物の石墨化におけるタイムスケールの検証
  • Author(s): 森なつみ S. Wallis 森宏
  • Organizer: 日本地質学会2012体会
  • Place of Presentation: 大阪
• [Presentation] 室戸岬斑糲岩体の貫入熱モデリング
  • Author(s): 森宏 S. Wallis 森なつみ
  • Organizer: 日本地質学会2012体会
  • Place of Presentation: 大阪
• [Presentation] Paired metamorphism in SW Japan: tectonic models for the Sanbagawa and Ryoke Belts
  • Author(s): S. Wallis, T. Okudaira
  • Organizer: 日本地質学会2012体会
  • Place of Presentation: 大阪
• [Book] 日本の地質構造100選 (2012)
  • Author(s): 高木秀雄編集(Wallis共著)
  • Total Pages: 171
  • Publisher: 朝倉書店