Age analyses of Cretaceous granitic rocks in the Japanese Islands

2010 Fiscal Year Final Research Report

• Project/Area Number: 20540473
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Petrology/Mineralogy/Science of ore deposit
• Research Institution: National Museum of Nature and Science, Tokyo
• Principal Investigator: YOKOYAMA Kazumi National Museum of Nature and Science, Tokyo, 地学研究部, グループ長 (40126628)
• Co-Investigator(Kenkyū-buntansha): TSUTSUMI Yukiyasu 国立科学博物館, 地学研究部, 研究員 (00370990)
• Project Period (FY): 2008 – 2010
• Keywords: かこう岩 / 年代 / 白亜紀 / 日本列島

Research Abstract

We developed the age method using uraninite and thorite in granitic rocks. And then we analyzed many radiogenic minerals in the granitic rocks in the Japanese Islands. The age results show that the age is different from region to region. Northern Kyushu and Tohoku region were especially analyzed in detail.

Research Products

• [Journal Article] U-Th-total Pb ages of uraninite and thorite from granitic rocks in the Japanese (2010)
  • Author(s): Yokoyama, K., Shigeoka, M., Goto, A., Terada, K., Hidaka, K., Tsutsumi, Y.
  • Journal Title: Islands.Bull.Natn.Mus. Nature & Science Ser.C 36 Pages: 7-19
  • Peer Reviewed
• [Journal Article] Granitoids with 300 Ma in the Joban coastal region, east of Abukuma Plateau, northeast Japan. (2010)
  • Author(s): Tsutsumi, Y., Ohtomo, Y., Horie, K., Nakamura, K., Yokoyama, K.
  • Journal Title: J.Mineral.Petrol.Sci. 105 Pages: 320-327
  • Peer Reviewed
• [Journal Article] Crystallization of REE minerals and redistribution of U, Th, and REE at contact boundary between granite and gabbro during hydrothermal alteration. (2010)
  • Author(s): Horie, K., Tsutsumi, Y., Cho, M., Morishita, Y., Hidaka, H.
  • Journal Title: Physics and Chemistry of the Earth 35 Pages: 284-291
  • Peer Reviewed
• [Journal Article] Ages of zircons in jadeite and jadeite-bearing rocks of Japanese Islands. (2010)
  • Author(s): Tsutsumi, Y., Yokoyama, K., Miyawaki, R., Matsubara, S., Terada, K., Hidaka, K.
  • Journal Title: Bull.Natn.Mus.Nature & Science Ser.C 36 Pages: 19-30
  • Peer Reviewed
• [Journal Article] Chloritized granitic rock in the Nagato Tectonic Zone, southwest Japan : an example of a static metasomatic rock in the serpentinite melange zone. (2009)
  • Author(s): Yokoyama, K., Goto, A., Tsutsumi, Y.
  • Journal Title: Bulletin of National Museum of Nature and Science, Ser.C 35 Pages: 11-18
  • Peer Reviewed
• [Journal Article] A U-Pb geochronological study of migmatitic gneiss in the Busan gneiss complex, Gyeonggi massif, Korea. (2009)
  • Author(s): Horie, K., Tsutsumi, Y., Kim, H., Cho, M., Hidaka, H, Terada, K.
  • Journal Title: Geosciences Journal 13 Pages: 205-215
  • Peer Reviewed
• [Presentation] 長崎県野母崎東部に産する花崗岩質 構造岩塊のジルコンU-Pb年代 (2010)
  • Author(s): 堤之恭・堀江憲路・白石和行・横山一己
  • Organizer: 日本地球化学会2010年度大会
  • Place of Presentation: 立正大学
  • Year and Date: 20100900
• [Presentation] 岡山県高梁市布賀鉱山産jacquedietrichite (2010)
  • Author(s): 草地功・宮脇律郎・横山一己・重岡昌子・松原聰・田中崇裕・田邊満雄
  • Organizer: 日本鉱物科学会2010年年会
  • Place of Presentation: 松江
  • Year and Date: 20100900
• [Presentation] 福島県水晶山産のTaに富むβフェルグソン石 (2010)
  • Author(s): 宮脇律郎・重岡昌子・横山一己・松原聰・小林寿宣
  • Organizer: 日本鉱物科学会2010年年会
  • Place of Presentation: 松江
  • Year and Date: 20100900
• [Presentation] 東北日本における石炭紀花崗岩質岩及び変成岩の年代とその配列 (2009)
  • Author(s): 堤之恭・宮下敦・大友幸子・堀江憲路・板谷徹丸・中村光一・横山一己
  • Organizer: 日本鉱物科学会2009年度学術講演会
  • Place of Presentation: 北海道大学
  • Year and Date: 20090900