Distribution of REE and actinide in zirconolite, and application for geochronology

• Project/Area Number: 15K05343
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Petrology/Mineralogy/Economic geology
• Research Institution: Yamaguchi University
• Principal Investigator: Shimura Toshiaki 山口大学, 大学院創成科学研究科, 教授 (70242451)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2015: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 岩石・鉱物・鉱床学 / ジルコノライト / 年代学 / REE / 南極大陸 / カソードルミネッセンス / 核廃棄物処理 / 地殻・マントル物質 / 地質学 / 廃棄物処理 / 惑星起源・進化 / 惑星期限・進化

Outline of Final Research Achievements

I found zirconolite from Sor-Rondane Mountains, Antarctica. This zirconolite intimately occurs with baddeleyite and corundum. Cathode-luminescence (CL) image is important to study for such minerals. I made an original CL port for such mineral. Now the CL detector and EDS detector can use at the same time.
The ideal chemical formula of zirconolite is CaZrTi2O7. However, this zirconolite contains significant Y, REE, U, and Th. Combination of cation exchange of plural sites has been revealed for such chemical composition. These are mainly "Ca-REE" exchange and "Ti-(Fe, Mg)" exchange. CHIME-age of the zirconolite was 528Ma. Zirconolite can use as a chronometer.

Research Products

• [Int'l Joint Research] University of Western Australia(Australia)
• [Int'l Joint Research] University of Western Australia/James Cook University(Australia)
• [Journal Article] A low-angle brittle shear zone in the western Sør Rondane Mountains, Dronning Maud Land, East Antarctica - Implication for assembly of Gondwanaland. (2018)
  • Author(s): Tsukada K., Yuhara M., Owada M., Shimura T., Kamei A., Kouchi Y., Yamamoto K.
  • Journal Title: Journal of Geodynamics Volume: 111 Pages: 15-30
  • DOI: 10.1016/j.jog.2017.08.001
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Tetrahedral plot diagram: A geometrical solution for quaternary systems. (2015)
  • Author(s): Shimura, T. and Kemp, A.I.S.
  • Journal Title: American Mineralogist Volume: 100 Issue: 11-12 Pages: 2545-2547
  • DOI: 10.2138/am-2015-5371
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] ５０次南極観測隊と新鉱物の発見 (2015)
  • Author(s): 志村俊昭
  • Journal Title: 飯豊 Volume: 12 Pages: 51-63
• [Presentation] セール・ロンダーネ山地、小指尾根のジルコノライト:イットリウムに富む新鉱物か？！ (2017)
  • Author(s): 志村俊昭・石川真帆・Kemp, A.I.S.・Blake, K.・大和田正明・柚原雅樹・亀井淳志・束田和弘・外田智千
  • Organizer: 第89回西日本東南極研究セミナー
  • Place of Presentation: 山口大学（山口県山口市）
  • Year and Date: 2017-01-07
• [Presentation] セール・ロンダーネ山地、小指尾根の苦鉄質変成岩の岩石記載 (2017)
  • Author(s): 梅田侑子・志村俊昭・大和田正明・柚原正樹・亀井淳志・束田和弘
  • Organizer: 第89回西日本東南極研究セミナー
  • Place of Presentation: 山口大学（山口県山口市）
  • Year and Date: 2017-01-07
• [Presentation] 東南極セール・ロンダーネ山地、小指尾根地域のイットリウムに富むジルコノライト (2017)
  • Author(s): 志村俊昭・石川真帆・梅田侑子・伊藤広祥・大和田正明・亀井淳志・束田和弘・柚原雅樹
  • Organizer: 日本地質学会
• [Presentation] 東南極セール・ロンダーネ山地、小指尾根地域の苦鉄質変成岩類の変成組織 (2017)
  • Author(s): 梅田侑子・志村俊昭・大和田正明・柚原雅樹・亀井淳志・束田和弘
  • Organizer: 日本地質学会
• [Presentation] A new Melt Contamination Model for the Generation of “I-type” granitic rocks by melting heterogeneous lower crust (2017)
  • Author(s): Hammerli J, Kemp A. and Shimura T.
  • Organizer: European Geosciences Union General Assembly
  • Int'l Joint Research
• [Presentation] 泥質変成岩におけるスピネル＋斜長石共生の成因 (2016)
  • Author(s): 志村俊昭・原田悠暉・小島萌
  • Organizer: 日本地質学会第123年学術大会
  • Place of Presentation: 日本大学（東京都世田谷区）
  • Year and Date: 2016-09-11
• [Presentation] Garnet-sillimanite-spinel-plagioclase geobarometer (2016)
  • Author(s): Shimura, T., Kojima, M. and Harada, Y.
  • Organizer: Goldschmidt Conference 2016, Yokohama
  • Place of Presentation: パシフィコ横浜（神奈川県横浜市）
  • Year and Date: 2016-06-27
  • Int'l Joint Research
• [Presentation] ザクロ石-珪線石-スピネル-斜長石圧力計の適用例 (2016)
  • Author(s): 志村俊昭
  • Organizer: 第86回西日本東南極研究セミナー
  • Place of Presentation: 山口大学（山口県山口市）
  • Year and Date: 2016-04-01
• [Presentation] The history of crustal formation and re-organization in relation to episodic granitic magmatism in Southwest Japan (2015)
  • Author(s): Nakajima, T., Takahashi, M., Imaoka, T. and Shimura, T.
  • Organizer: 8th Hutton Symposium on the Origin of Granites and Related Rocks
  • Place of Presentation: Florianopolis, Brazil
  • Year and Date: 2015-09-22
  • Int'l Joint Research
• [Presentation] 日高変成帯の形成テクトニクス（１）：二度の変成作用と地殻の二重構造 (2015)
  • Author(s): 志村俊昭・小島 萌・Kemp, A. I. S.
  • Organizer: 日本地質学会
  • Place of Presentation: 信州大学（長野県長野市）
  • Year and Date: 2015-09-13
• [Presentation] 日高変成帯の形成テクトニクス（２）：二度の火成活動 (2015)
  • Author(s): 小島 萌・Kemp，A.I.S.・大橋美由希・志村俊昭
  • Organizer: 日本地質学会
  • Place of Presentation: 信州大学（長野県長野市）
  • Year and Date: 2015-09-13
• [Presentation] 東南極セール・ロンダーネ山地，ブラットニーパネ地域に産するフォルステライト-スピネル岩の変成P-T-t経路 (2015)
  • Author(s): 石川真帆・志村俊昭・大和田正明・亀井淳志・束田和弘・柚原雅樹
  • Organizer: 日本地質学会
  • Place of Presentation: 信州大学（長野県長野市）
  • Year and Date: 2015-09-13
• [Book] Geology of Japan (2016)
  • Author(s): Nakajima, T., Takahashi, M., Imaoka, T. and Shimura, T.
  • Total Pages: 536
  • Publisher: Geological Society of London
• [Book] Granitic Rocks. In Moreno, T., Wallis, S. R., Kojima, T. and Gibbons, W., Eds., The Geology of Japan (2016)
  • Author(s): Nakajima, T., Takahashi, M., Imaoka, T. and Shimura, T.
  • Total Pages: 536
  • Publisher: Geological Society of London
• [Patent(Industrial Property Rights)] 試料観察装置 (2016)
  • Inventor(s): 志村俊昭
  • Industrial Property Rights Holder: 山口大学
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2016-233865
  • Filing Date: 2016-12-01