鉱物サブミクロン領域の(U-Th)/He年代測定への挑戦

2015 Fiscal Year Research-status Report

• Project/Area Number: 15K13598
• Research Institution: Hokkaido University
• Principal Investigator: 圦本 尚義 北海道大学, 理学(系)研究科(研究院), 教授 (80191485)
• Co-Investigator(Kenkyū-buntansha): 馬上 謙一 北海道大学, 理学(系)研究科(研究院), 助教 (70624758)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 地球化学 / 年代学 / ジルコン / (U-Th)/He / テクトニクス

Outline of Annual Research Achievements

(U-Th)-He系の年代測定法を発展させ新世代の熱年代学の手法を開発し，造山作用や大陸成長に伴い変化する地球表層環境の長期変動の理解に貢献することである。(U-Th)-He系は閉鎖温度が低いため，山脈形成過程のような低温領域の地球史復元に有効な年代測定法である。もし鉱物中のHe濃度のゾーニングが測定できるようになれば，その鉱物が辿った熱履歴を完全に復元する道が拓かれる。しかしながら，Heの局所分析は，現在のところ，最高で数十μm領域に限られていて，α粒子リコイル損失の飛程を超えられていない。本研究では，独自に開発している新原理で動作する質量分析計LIMASを改良することにより，鉱物のサブミクロン領域における（U-Th）He系のその場年代測定に挑戦する。本年度は以下の研究成果が得られた．
1. サンプルチャンバーのビューポートを真空二重構造に工作した．
2. ビューポートガラス間の中間空間をターボポンプにより高真空に保つ機構を製作した．
3. 4He信号のブランク値と中間空間の真空度との相関を測定したが，直接の相関を認めることができなかった．
4. 一次イオンカラムの収差補正機構部の高電圧導入用のフィードスルーに微小の真空リークがあることを見出し，フィードスルーに追加工を行うことにより真空リークをストップした．その結果，4He信号のブランク値を約１桁減少させることに成功した．
5. U, Th濃度と形成年代が既知のジルコン結晶標準物質#91500を用いて4Heを検出できた．そのヘリウム濃度は，U-Th-He法の関係式から推定した場合，脱ガスしていないと仮定すると約55 ppmであった．

Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

初年度に計画していた基礎実験をほぼ予定通り実行できたため．

Strategy for Future Research Activity

1.ジルコンの4He濃度を，サブミクロンの分解能で測定する測定法を開発する．定量補正にはHeを既知量イオン注入したジルコン単結晶を用いる．
2.ジルコン中のHe拡散実験を行い，拡散の温度依存性の決定を開始する．
3.オーストラリアジャックヒル地域のジルコン結晶の測定を開始し，冥王代・大古代ジルコンの熱年代学を開始する．
4.鉱物中の成長中心から表面までのHe,U,Thの濃度プロファイルを解析することにより鉱物１粒から熱履歴を求める．

Research Products

• [Journal Article] New constraints on upper mantle creep mechanism inferred from silicon grain-boundary diffusion rates. (2016)
  • Author(s): Fei, H., Koizumi, S., Sakamoto, N., Hashiguchi, M., Yurimoto, H., Marquardt, K., Miyajima, N., Yamazaki, D. and Katsura, T.
  • Journal Title: Earth Planet. Sci. Lett. Volume: 433 Pages: 350-359
  • DOI: 10.1016/j.epsl.2015.11.014
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] P-O-rich sulfide phase in CM chondrites: Constraints on its origin on the CM parent body. (2016)
  • Author(s): Zhang, A. -C., Itoh, S., Yurimoto, H., Hsu, W. -B., Wang, R. -C. and Taylor, L. A.
  • Journal Title: Meteorit. Planet. Sci. Volume: 51 Pages: 56-69
  • DOI: 10.1111/maps.12583
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Mineralogical anatomy and implications of a Ti-Sc-rich ultrarefractory inclusion from Sayh al Uhaymir 290 CH3 chondrite. (2015)
  • Author(s): Zhang, A.-C., Ma, C., Sakamoto, N., Wang, R.-C., Hsu, W.-B. and Yurimoto, H.
  • Journal Title: Geochim. Cosmochim. Acta Volume: 163 Pages: 27-39
  • DOI: 10.1016/j.gca.2015.04.052
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Deuterium- and 15N-signatures of organic globules in Murchison and Northwest Africa 801 meteorites. (2015)
  • Author(s): Hashiguchi, M., Kobayashi, S. and Yurimoto, H.
  • Journal Title: Geochem. J. Volume: 49 Pages: 377-391
  • DOI: 10.2343/geochemj.2.0363
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Synthesis of large and homogeneous single crystals of water-bearing minerals by slow cooling at deep-mantle pressures. (2015)
  • Author(s): Okuchi, T., Purevjav, N., Tomioka, N., Lin, J.-F., Kuribayashi, T., Schoneveld, L., Hwang, H., Sakamoto, N., Kawasaki, N. and Yurimoto, H.
  • Journal Title: American Mineralogist Volume: 100 Pages: 1483-1492
  • DOI: 10.2138/am-2015-5237
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] 26Al-26Mg chronology and oxygen isotope distributions of multiple melting for a Type C CAI from Allende. (2015)
  • Author(s): Kawasaki, N., Kato, C., Itoh, S., Wakaki, S., Ito, M. and Yurimoto, H.
  • Journal Title: Geochim. Cosmochim. Acta Volume: 169 Pages: 99-114
  • DOI: 10.1016/j.gca.2015.07.037
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Depth profiling analysis of solar wind helium collected in diamond-like carbon film from Genesis. (2015)
  • Author(s): Bajo, K., Olinger, C. T., Jurewicz, A. J. G., Burnett, D. S., Sakaguchi, I., Suzuki, T., Itose, S., Ishihara, M., Uchino, K., Wieler, R. and Yurimoto, H.
  • Journal Title: Geochem. J. Volume: 49 Pages: 559-566
  • DOI: 10.2343/geochemj.2.0385
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Hydrogen self-diffusivity in single crystal ringwoodite: Implications for water content and distribution in the mantle transition zone. (2015)
  • Author(s): Sun, W., Yoshino, T., Sakamoto, N. and Yurimoto, H.
  • Journal Title: Geophys. Res. Lett. Volume: 42 Pages: 6582-6589
  • DOI: 10.1002/2015GL064486
  • Peer Reviewed / Open Access
• [Journal Article] A possible new Al-bearing hydrous Mg-silicate (23 angstrom phase) in the deep upper mantle. (2015)
  • Author(s): Cai, N., Inoue, T., Fujino, K., Ohfuji, H. and Yurimoto, H.
  • Journal Title: American Mineralogist Volume: 100 Pages: 2330-2335
  • DOI: 10.2138/am-2015-5148
  • Peer Reviewed / Open Access
• [Journal Article] Comparative compressibility of hydrous wadsleyite and ringwoodite: Effect of H2O and implications for detecting water in the transition zone. (2015)
  • Author(s): Chang, Y.-Y., Jacobsen, S.D., Bina, C.R., Thomas, S.-M., Smyth, J.R., Frost, D.J., Ballaran, T.B., McCammon, C.A., Hauri, E.H., Inoue, T., Yurimoto, H., Meng, Y. and Dera, P.
  • Journal Title: J. Geophys. Res. Solid Earth Volume: 120 Pages: 8259-8280
  • DOI: 10.1002/2015JB012123
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Volatile Content of the Lunar Magma Ocean: Constraints from KREEP Basalts 15382 and 15386. (2016)
  • Author(s): Greenwood, J. P.; Sakamoto, N.; Itoh, S.; Singer, J. A.; Warren, P. H.; Yurimoto, H
  • Organizer: 47th Lunar and Planetary Science Conference
  • Place of Presentation: ウッドランド（アメリカ）
  • Year and Date: 2016-03-21 – 2016-03-25
  • Int'l Joint Research
• [Presentation] Oxygen Isotope Variation with Crystal Growth Observed in Allende Coarse-Grained Type B CAI TS34 ― Revisited. (2016)
  • Author(s): Kawasaki, N.; Yurimoto, H.; Simon, S. B.; Grossman, L.
  • Organizer: 47th Lunar and Planetary Science Conference
  • Place of Presentation: ウッドランド（アメリカ）
  • Year and Date: 2016-03-21 – 2016-03-25
  • Int'l Joint Research
• [Presentation] Photochemistry in Molecular Cloud and Protoplanetary Disk: Evolution of Ice and Organic Residues Through Warming and UV-Irradiation. (2016)
  • Author(s): Piani, L.; Tachibana, S.; Hama, T.; Sugawara, I.; Oba, Y.; Tanaka, H.; Kimura, Y.; Miyake, A.; Matsuno, J.; Tsuchiyama, A.; Yurimoto, H.; Kouchi, A.
  • Organizer: 47th Lunar and Planetary Science Conference
  • Place of Presentation: ウッドランド（アメリカ）
  • Year and Date: 2016-03-21 – 2016-03-25
  • Int'l Joint Research
• [Presentation] Hydrogen Isotopic Evolution of Water and Organic Compounds on Chondritic Asteroids. (2016)
  • Author(s): Piani, L.; Remusat, L.; Robert, F.; Yurimoto, H.
  • Organizer: 47th Lunar and Planetary Science Conference
  • Place of Presentation: ウッドランド（アメリカ）
  • Year and Date: 2016-03-21 – 2016-03-25
  • Int'l Joint Research
• [Presentation] Current Status and Future Prospects of JAXA's Astromaterials Science Research Group. (2016)
  • Author(s): Abe, M.; Okada, T.; Yada, T.; Uesugi, M.; Karouji, Y.; Nakato, A.; Hashiguchi, M.; Matsumoto, T.; Nshimura, M.; Kumagai, K.; Matsui, S.; Nakauchi, Y.; Yurimoto, H.
  • Organizer: 47th Lunar and Planetary Science Conference
  • Place of Presentation: ウッドランド（アメリカ）
  • Year and Date: 2016-03-21 – 2016-03-25
  • Int'l Joint Research
• [Presentation] Hydrogen Isotopic Compositions and Chemical Structures of Organic Materials in Northwest Africa 801 CR2 Chondrite: Implications for Metamorphism Histories of Extraterrestrial Organic Materials. (2016)
  • Author(s): Hashiguchi, M.; Yurimoto, H.
  • Organizer: 47th Lunar and Planetary Science Conference
  • Place of Presentation: ウッドランド（アメリカ）
  • Year and Date: 2016-03-21 – 2016-03-25
  • Int'l Joint Research
• [Presentation] LIMAS: Tunnel-Ionization Time-of-Flight Sputtered Neutral Mass Spectrometer. (2016)
  • Author(s): Yurimoto, H.
  • Organizer: The Solar-System symposium in Sapporo (3S 2016)
  • Place of Presentation: ルスツリゾート（北海道虻田郡）
  • Year and Date: 2016-02-17 – 2016-02-19
  • Int'l Joint Research / Invited
• [Presentation] Micro distribution of solar wind helium on Itokawa particles. (2015)
  • Author(s): K. Bajo, I. Sakaguchi, T. Suzuki, S. Itose, M. Matsuya, M. Ishihara,K. Uchino and H. Yurimoto
  • Organizer: HAYABUSA2015: 3rd Symposium of Solar System Materials
  • Place of Presentation: JAXA（神奈川県相模原市）
  • Year and Date: 2015-11-18 – 2015-11-20
  • Int'l Joint Research
• [Presentation] Data Acquisition Electronic System for Time-of-Flight Sputtered Neutral Mass Spectrometer. (2015)
  • Author(s): K. Bajo, O. Fujioka, S. Itose, M. Ishihara, K. Uchino and H. Yurimoto
  • Organizer: 10th International Symposium on Atomic Level Characterizations for New Materials and Devices '15
  • Place of Presentation: くにびきメッセ（島根県松江市）
  • Year and Date: 2015-10-25 – 2015-10-30
  • Int'l Joint Research
• [Presentation] Evaluation for Multi-Turn Time of Flight Mass Spectrum of Laser Ionization Mass NanoScope (LIMAS). (2015)
  • Author(s): A.Tonotani, K. Bajo, S. Itose, M. Ishihara, K. Uchino and H. Yurimoto
  • Organizer: 10th International Symposium on Atomic Level Characterizations for New Materials and Devices '15
  • Place of Presentation: くにびきメッセ（島根県松江市）
  • Year and Date: 2015-10-25 – 2015-10-30
  • Int'l Joint Research
• [Presentation] Quantitative Analysis of Helium by Post Ionization Method using Femto-Second Laser Technique. (2015)
  • Author(s): H. Yurimoto, K. Bajo, I. Sakaguchi, T.T. Suzuki, S. Itose, K. Uchino and M. Ishihara
  • Organizer: 10th International Symposium on Atomic Level Characterizations for New Materials and Devices '15
  • Place of Presentation: くにびきメッセ（島根県松江市）
  • Year and Date: 2015-10-25 – 2015-10-30
  • Int'l Joint Research / Invited
• [Presentation] High Spatial Resolution Helium Isotope Imaging with LIMAS (2015)
  • Author(s): K. Bajo, S. Itose, M. Matsuya, M. Ishihara, K. Uchino, I. Sakaguchi and H. Yurimoto
  • Organizer: 10th International Symposium on Atomic Level Characterizations for New Materials and Devices '15
  • Place of Presentation: くにびきメッセ（島根県松江市）
  • Year and Date: 2015-10-25 – 2015-10-30
  • Int'l Joint Research
• [Presentation] Concentration Dependence of Water Diffusion in Silica Glass at 50 Bar H2O Pressure. (2015)
  • Author(s): Kuroda M, Tachibana S, Okumura S, Nakamura M, Sakamoto N & Yurimoto H
  • Organizer: Goldschmidt2015
  • Place of Presentation: プラハ（チェコ）
  • Year and Date: 2015-08-16 – 2015-08-21
  • Int'l Joint Research
• [Presentation] The Stability and Water Solubility of Possible Al-Bearing High Pressure Hydrous and Nominally Anhydrous Minerals in the Mantle. (2015)
  • Author(s): Inoue T, Kakizawa S, Cai N, Fujino K, Kuribayashi T, Nagase T, Gre´aux S, Higo Y, Sakamoto N & Yurimoto H
  • Organizer: Goldschmidt2015
  • Place of Presentation: プラハ（チェコ）
  • Year and Date: 2015-08-16 – 2015-08-21
  • Int'l Joint Research
• [Presentation] Water Solubility of Al-Bearing Bridgmanite at the Lower Mantle Condition. (2015)
  • Author(s): Kakizawa S, Inoue T & Yurimoto H
  • Organizer: Goldschmidt2015
  • Place of Presentation: プラハ（チェコ）
  • Year and Date: 2015-08-16 – 2015-08-21
  • Int'l Joint Research
• [Presentation] The Peritectic Reaction of Olivine to Orthopyroxene in Natural Silicates. (2015)
  • Author(s): Zellmer GF, Sakamoto N, Matsuda N, Moebis A, Iizuka Y & Yurimoto H
  • Organizer: Goldschmidt2015
  • Place of Presentation: プラハ（チェコ）
  • Year and Date: 2015-08-16 – 2015-08-21
  • Int'l Joint Research
• [Presentation] High Chlorine of KREEP: Implications for the Volatile Content of the Moon. (2015)
  • Author(s): Greenwood J, Sakamoto N, Itoh S, Singer J, Warren P & Yurimoto H
  • Organizer: Goldschmidt2015
  • Place of Presentation: プラハ（チェコ）
  • Year and Date: 2015-08-16 – 2015-08-21
  • Int'l Joint Research
• [Presentation] Depth Distribution of Solar Wind He Implanted into NASA Genesis Targets. (2015)
  • Author(s): Yurimoto H, Bajo K, Olinger CT, Jurewicz AJG, Burnett DS, Sakaguchi I, Suzuki TT, Itose S, Ishihara M, Uchino K & Wieler R
  • Organizer: Goldschmidt2015
  • Place of Presentation: プラハ（チェコ）
  • Year and Date: 2015-08-16 – 2015-08-21
  • Int'l Joint Research
• [Presentation] Evolution of Organic Molecules in Space: From Ice Deposition to Organic Residues. (2015)
  • Author(s): Piani L, Tachibana S, Hama T, Kimura Y, Endo Y, Fujita K, Nakatsubo S, Fukushi H, Mori S, Chigai T, Yurimoto H & Kouchi A
  • Organizer: Goldschmidt2015
  • Place of Presentation: プラハ（チェコ）
  • Year and Date: 2015-08-16 – 2015-08-21
  • Int'l Joint Research
• [Presentation] Early Disk Dynamics Inferred from Isotope Systematics of Individual Chondrules. (2015)
  • Author(s): Bollard J. Kawasaki N. Sakamoto N. Larsen K. Wielandt D. Schiller M. Connelly J. N. Yurimoto H. Bizzarro M.
  • Organizer: 78th Annual Meeting of the Meteoritical Society
  • Place of Presentation: バークレー（アメリカ）
  • Year and Date: 2015-07-27 – 2015-07-31
  • Int'l Joint Research
• [Presentation] Formation Period for a Fluffy Type A CAI from Vigarano. (2015)
  • Author(s): Kawasaki N. Sakamoto N. Yurimoto H.
  • Organizer: 78th Annual Meeting of the Meteoritical Society
  • Place of Presentation: バークレー（アメリカ）
  • Year and Date: 2015-07-27 – 2015-07-31
  • Int'l Joint Research
• [Presentation] Microdistribution of Solar Wind Helium on Itokawa Particle Surfaces. (2015)
  • Author(s): Yurimoto H. Bajo K. Sakaguchi I. Suzuki T. T. Itose S. Matsuya M. Ishihara M. Uchino K.
  • Organizer: 78th Annual Meeting of the Meteoritical Society
  • Place of Presentation: バークレー（アメリカ）
  • Year and Date: 2015-07-27 – 2015-07-31
  • Int'l Joint Research
• [Presentation] Photochemistry in Molecular Clouds: Structure and Physical Properties of Organic Residues and Ice and Sublimation of Volatile Molecules. (2015)
  • Author(s): Tachibana S. Piani L. Dessimoulie L. Hama T. Kimura Y. Endo Y. Fujita K. Nakatsubo S. Fukushi H. Mori S. Chigai T. Yurimoto H. Kouchi A.
  • Organizer: 78th Annual Meeting of the Meteoritical Society
  • Place of Presentation: バークレー（アメリカ）
  • Year and Date: 2015-07-27 – 2015-07-31
  • Int'l Joint Research
• [Presentation] トンネルイオン化SNMS装置（LIMAS）の飛行時間型質量分析計の評価. (2015)
  • Author(s): 殿谷 梓, 馬上 謙一, 圦本 尚義
  • Organizer: Japan Geoscience Union Meeting 2015
  • Place of Presentation: 幕張メッセ国際会議場（千葉県千葉市）
  • Year and Date: 2015-05-24 – 2015-05-28
• [Presentation] We are always on the frontier! (2015)
  • Author(s): 圦本 尚義
  • Organizer: Japan Geoscience Union Meeting 2015
  • Place of Presentation: 幕張メッセ国際会議場（千葉県千葉市）
  • Year and Date: 2015-05-24 – 2015-05-28
  • Invited
• [Presentation] Vigarano隕石産Type B1 CAIの酸素同位体分布. (2015)
  • Author(s): 山本 淳博, 川崎 教行, 坂本 直哉, 圦本 尚義
  • Organizer: Japan Geoscience Union Meeting 2015
  • Place of Presentation: 幕張メッセ国際会議場（千葉県千葉市）
  • Year and Date: 2015-05-24 – 2015-05-28
• [Presentation] アエンデ隕石Type C CAIの酸素同位体分布と加熱溶融のAl-Mg年代. (2015)
  • Author(s): 川崎 教行, 加藤 千図, 伊藤 正一, 若木 重行, 伊藤 元雄, 圦本 尚義
  • Organizer: Japan Geoscience Union Meeting 2015
  • Place of Presentation: 幕張メッセ国際会議場（千葉県千葉市）
  • Year and Date: 2015-05-24 – 2015-05-28
• [Presentation] Evolution of organic molecules in space: characteristics and properties of experimental organic residues. (2015)
  • Author(s): Laurette PIANI, Shogo TACHIBANA, Tetsuya HAMA, Yuki KIMURA, Y. ENDO, K. FUJITA, S. NAKATSUBO, H. FUKUSHI, S. MORI, T. CHIGAI, Hisayoshi YURIMOTO, Akira KOUCHI
  • Organizer: Japan Geoscience Union Meeting 2015
  • Place of Presentation: 幕張メッセ国際会議場（千葉県千葉市）
  • Year and Date: 2015-05-24 – 2015-05-28
• [Presentation] D/H exchange in wadsleyite and ringwoodite: Implications for electrical conductivity. (2015)
  • Author(s): Wei SUN, Takashi YOSHINO, Naoya SAKAMOTO, Hisayoshi YURIMOTO
  • Organizer: Japan Geoscience Union Meeting 2015
  • Place of Presentation: 幕張メッセ国際会議場（千葉県千葉市）
  • Year and Date: 2015-05-24 – 2015-05-28
• [Presentation] Si and O self-diffusion in stishovite. (2015)
  • Author(s): Fang XU, Daisuke YAMAZAKI, Naoya SAKAMOTO, Hisayoshi YURIMOTO
  • Organizer: Japan Geoscience Union Meeting 2015
  • Place of Presentation: 幕張メッセ国際会議場（千葉県千葉市）
  • Year and Date: 2015-05-24 – 2015-05-28
• [Presentation] Concentration dependence of water diffusion in silica glass at water pressure of 50 bar. (2015)
  • Author(s): 黒田 みなみ, 橘 省吾, 奥村 聡, 中村 美千彦, 坂本 直哉, 圦本 尚義
  • Organizer: Japan Geoscience Union Meeting 2015
  • Place of Presentation: 幕張メッセ国際会議場（千葉県千葉市）
  • Year and Date: 2015-05-24 – 2015-05-28
• [Presentation] Recent progress for stability and water solubility of hydrous and nominally anhydrous minerals in the mantle. (2015)
  • Author(s): 井上 徹, 柿澤 翔, 蔡 閙, 藤野 清志, 栗林 貴弘, 長瀬 敏郎, Steeve Greaux, 肥後 祐司, 坂本 直哉, 圦本 尚義
  • Organizer: Japan Geoscience Union Meeting 2015
  • Place of Presentation: 幕張メッセ国際会議場（千葉県千葉市）
  • Year and Date: 2015-05-24 – 2015-05-28
• [Remarks] 北海道大学大学院理学研究院圦本研究室ホームページ
  • URL: http://vigarano.ep.sci.hokudai.ac.jp/