Geological histories and local subsidence of the Ryukyu Island Arc

2013 Fiscal Year Final Research Report

• Project/Area Number: 23540540
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Geology
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: ARAI Kohsaku 独立行政法人産業技術総合研究所, 地質情報研究部門, 研究グループ長 (30356381)
• Co-Investigator(Kenkyū-buntansha): IRYU Yasufumi 東北大学, 理学系研究科, 教授 (00250671) ; MACHIYAMA Hideaki 海洋研究開発機構, 海底資源研究プロジェクト, サブリーダー (00344284) ; INOUE Takahiko 産業技術総合研究所, 地質情報研究部門, 研究員 (90443168) ; SATO Tomoyuki 産業技術総合研究所, 地質情報研究部門, 研究員 (80555152)
• Co-Investigator(Renkei-kenkyūsha): MATSUDA Hiroki 熊本大学, 自然科学研究科, 教授 (80274687) ; SASAKI Keiichi 金沢学院大学, 美術文化学部, 准教授 (50340021)
• Project Period (FY): 2011 – 2013
• Keywords: テクトニクス / 海洋地質 / 精密地形調査 / サンゴ礁 / 第四紀 / 宮古曽根

Research Abstract

The Miyako-Sone submarine platform is located between Okinawa-jima and Miyako-jima islands extends approximately 70 km from north to south and 50 km from east to west, and water depths along the outer edge range from 120 to 170 m. We obtained detailed data in this area to investigate the geological histories of subsidence of the platform. Steep slope of western margin of the platform have been downthrown towards the west due to displacements on the western sides of normal faults. Subsidence of the Miyako-Sone submarine platform was the result of large vertical displacements on such normal faults. We also found the clear image of submerged coral reef on the platform that is formed during last deglaciation ages.

Research Products

• [Journal Article] Subsidence of the Miyako-Sone submarine carbonate platform, east of Miyako-jima Island, northwestern Pacific Ocean (2014)
  • Author(s): Kohsaku Arai, Hideaki Machiyama, Shun Chiyonobu, Hiroki Matsuda, Keiichi Sasaki, Marc Humblet and Yasufumi Iryu
  • Journal Title: ISLAND ARC Volume: 23巻 Pages: 1-15
  • DOI: 10.1111/iar.12051
  • Peer Reviewed
• [Journal Article] Chronological and paleo -ceanographic constraint of Miocene to Pliocene 'mud sea' in the Ryukyu Island (southwestern Japan) based on calcareous nannofossil assemblages (2013)
  • Author(s): Ryo Imai, Tokiyuki Sato and Yasufumi Iryu
  • Journal Title: ISLAND ARC Volume: 22巻 Pages: 522-537
  • DOI: 10.1111/iar.12046
  • Peer Reviewed
• [Journal Article] MIS 7 interglacial sea-surface temperature and salinity reconstructions from a southwestern subtropical Pacific coral (2013)
  • Author(s): Ryuji Asami, Yasufumi Iryu, Kimio Hanawa, Takashi Miwa, Peter Holden, Ryuichi Shinjo and Gustav Paulay
  • Journal Title: Quaternary Research Volume: 80巻 Pages: 575-585
  • DOI: 10.1016/j.yqres.2013.09.002
  • Peer Reviewed
• [Journal Article] Recent macroids on the Kikai-jima shelf, Central Ryukyu Islands, Japan (2012)
  • Author(s): Davide Bassi, Yasufumi Iryu, Marc Humblet, Hiroki Matsuda, Hideaki Machiyama, Keiichi Sasaki, Shinya Matsuda, Kohsaku Arai, Takahiko Inoue
  • Journal Title: Sedimentology Volume: 59巻 Pages: 2024-2041
  • DOI: 10.1111/j.1365-3091.2012.01333.x
  • Peer Reviewed
• [Journal Article] Hydrolithon braganum sp. nov. (Corallinaceae, Rhodophyta), the first known exclusively fossil semi-endophytic coralline red alga (2012)
  • Author(s): Waelker William J. Woelkerling, Davide Bassi and Yasufumi Iryu
  • Journal Title: Phycologia Volume: 51巻 Pages: 604-611
  • DOI: 10.2216/11-119.1
  • Peer Reviewed
• [Journal Article] 沖縄島周辺の島弧の成立と島弧胴切り断層の発達 (2012)
  • Author(s): 荒井晃作・佐藤智之・井上卓彦
  • Journal Title: 月刊地球 Volume: 34巻 Pages: 373-379
• [Journal Article] 浅海性炭酸塩堆積物に基づく氷期の琉球列島北部の海洋環境-氷期にサンゴ礁はあったのか?- (2012)
  • Author(s): 松田博貴・町山栄章・荒井晃作・井上卓彦・佐々木圭一・吉津憲・三納正美・井龍康文・杉原薫・藤田和彦・山田努・中森亨
  • Journal Title: 月刊地球 Volume: 34巻 Pages: 363-372
• [Journal Article] Seismic profiling survey of submerged coral reefs near Okinawa Island (2012)
  • Author(s): Kohsaku Arai, Sato Tomoyuki, Takahiko Inoue
  • Journal Title: Proceedings of the 12th International Coral Reef Symposium
  • URL: http://www.reefbase.org/resource_center/publication/icrs.aspx?icrs=ICRS12
  • Peer Reviewed
• [Journal Article] 沖縄本島南部に分布する琉球層群の層序 (2012)
  • Author(s): 寒河江健一・ハンブレ マーク・小田原啓・千代延俊・佐藤時幸・樺元淳一・高柳栄子・井龍康文
  • Journal Title: 地質学雑誌 Volume: 118巻 Pages: 117-136
  • Peer Reviewed
• [Journal Article] Submerged reefal deposits near a present‐day northern limit of coral reef formation in the northern Ryukyu Island Arc, northwestern Pacific Ocean (2011)
  • Author(s): Hiroki Matsuda, Kohsaku Arai, Hideaki Machiyama, Yasufumi Iryu, Yoshihiro Tsuji
  • Journal Title: ISLAND ARC Volume: 20巻 Pages: 411-425
  • DOI: 10.1111/j.1440-1738.2011.00775.x
  • Peer Reviewed
• [Journal Article] 沖縄島那覇港沖の海底コアから発見された知念層とその意義 (2011)
  • Author(s): 藤田和彦・千代延俊・溝渕年哉・井龍康文
  • Journal Title: 地質学雑誌 Volume: 117巻 Pages: 625-631
  • Peer Reviewed
• [Presentation] Newly found submerged reefs on the Miyako-Sone platform, Ryukyu Arc, northwestern Pacific (2013)
  • Author(s): Arai, K., Matsuda, H., Sasaki, K., Machiyama, H., Inoue, T. and Iryu, Y
  • Organizer: 2013 AGU Fall Meeting
  • Place of Presentation: San Francisco, 米国
  • Year and Date: 20131209-13
• [Presentation] 沖縄県宮古島北東沖・宮古曽根プラットフォームの形成史 (2013)
  • Author(s): 荒井晃作・松田博貴・井上卓彦・佐藤時幸・山崎誠・町山栄章・佐々木圭一・井龍康文
  • Organizer: 日本地質学会第120年学術大会
  • Place of Presentation: 東北大学
  • Year and Date: 20130914-16
• [Presentation] 石灰質ナンノ化石からみた多良間島に分布する多良間砂層の地質年代 (2013)
  • Author(s): 今井 遼・大関 萌・井龍康文
  • Organizer: 日本地質学会第120年学術大会
  • Place of Presentation: 東北大学
  • Year and Date: 20130914-16
• [Presentation] 石灰質ナンノ化石群集に基づく中新世~鮮新世の琉球列島"泥海(島尻層群)"の年代層序学的・古海洋学的復元 (2013)
  • Author(s): 今井 遼・佐藤時幸・井龍康文
  • Organizer: 古生物学会2013年年会・総会
  • Place of Presentation: 熊本大学
  • Year and Date: 20130629-30
• [Presentation] 沖縄"500m島棚"下部から採取された中期更新世の化石群集 (2013)
  • Author(s): 板木拓也・荒井晃作・小田啓邦・兼子尚知・中島 礼・田中裕一郎
  • Organizer: 古生物学会2013年年会・総会
  • Place of Presentation: 熊本大学
  • Year and Date: 20130629-30
• [Presentation] 石灰質ナンノ化石群集に基づく中新世~鮮新世の琉球列島"泥海(島尻層群)"の年代層序学的・古海洋学的復元 (2013)
  • Author(s): 今井 遼・佐藤時幸・井龍康文
  • Organizer: 2013年古海洋シンポジウム
  • Place of Presentation: 東京大学大気海洋研究所
  • Year and Date: 20130107-08
• [Presentation] 宮古島北東沖に見つかった沈水サンゴ礁 (2013)
  • Author(s): 荒井晃作・松田博貴・町山栄章・佐々木圭一・山口 毅・井龍康文・井上卓彦
  • Organizer: 炭酸塩コロキウム
  • Place of Presentation: ふれあいの家北九州
  • Year and Date: 2013-03-15
• [Presentation] 鹿児島県トカラ列島小宝島東方沖陸棚上の礁岩の堆積学的特徴とその年代 (2012)
  • Author(s): 松田博貴・荒井晃作・井上卓彦・町山栄章・佐々木圭一・井龍康文・佐藤時幸・山崎 誠
  • Organizer: 日本地質学会第119年学術大会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 20120915-17
• [Presentation] 沖縄島南西沖に発達する慶良間海裂の地質構造 (2012)
  • Author(s): 荒井晃作・佐藤智之・井上卓彦
  • Organizer: 日本地質学会第119年学術大会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 20120915-17
• [Presentation] Macroidi attuali della piattaforma di Kikai-Jima, Isole Ryukyu centrali (2012)
  • Author(s): Bassi, D., Iryu, Y., Humblet, M., Matsuda, H., Machiyama, H., Sasaki, K., Matsuda, S., Arai, K., Inoue, T
  • Organizer: Giappone, Giornate di Paleontologia XII Edizione
  • Place of Presentation: Catania, イタリア
  • Year and Date: 20120524-26
• [Presentation] 宮古島北東沖に見つかった沈水サンゴ礁 (2012)
  • Author(s): 荒井晃作・松田博貴・町山栄章・佐々木圭一・山口 毅・井龍康文・井上卓彦
  • Organizer: 日本サンゴ礁学会
  • Place of Presentation: 東京大学
  • Year and Date: 2012-11-22
• [Presentation] Seismic profiling survey on submerged coral reefs south off Okinawa Island in the northwestern Pacific (2012)
  • Author(s): Arai, K., Sato, T., Inoue T
  • Organizer: 12th International Coral Reef Symposium
  • Place of Presentation: ケアンズ, オーストラリア
  • Year and Date: 2012-07-09
• [Presentation] 沖縄島南西沖の沈水サンゴ礁 (2012)
  • Author(s): 荒井晃作・佐藤智之・井上卓彦
  • Organizer: 炭酸塩コロキウム
  • Place of Presentation: 伊豆高原
  • Year and Date: 2012-03-19
• [Presentation] 沖縄島周辺の島弧の成立と島弧胴切り断層の発達 (2011)
  • Author(s): 荒井晃作・佐藤智之・井上卓彦
  • Organizer: 大気海洋研究所研究集会「東シナ海および琉球弧の地史と古環境」
  • Place of Presentation: 東京大学大気海洋研究所
  • Year and Date: 20111003-04
• [Presentation] Occurrence of rapid subsidence on the Ryukyu Island Arc system (2011)
  • Author(s): Arai, K., Sato, T., Inoue T
  • Organizer: 2011 KJOD/IODP Workshop for Okinawa Trough Drilling
  • Place of Presentation: KIGAM, 韓国
  • Year and Date: 2011-07-04