Investigation on the correlated mechanisms between deep groundwater flow and material transport in the different plate tectonic fields

• Project/Area Number: 20241006
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Environmental dynamic analysis
• Research Institution: Kyoto University
• Principal Investigator: MAHARA Yasunori Kyoto University, 原子炉実験所, 教授 (30371537)
• Co-Investigator(Kenkyū-buntansha): TOKUNAGA Tomocjika 東京大学, 大学院・新領域創成学研究科, 准教授 (70237072) ; MATSUZAKI Hiroyuki 東京大学, 大学院・工学研究科原子力専攻, 准教授 (60313194)
• Co-Investigator(Renkei-kenkyūsha): OHTA Tomoko 京都大学, 原子炉実験所, 助教 (30373020) ; KUBOTA Takumi 京都大学, 原子炉実験所, 助教 (90335240) ; NAKATA Eiji 財団法人電力中央研究所, 主任研究員 (80371409)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥36,920,000 (Direct Cost: ¥28,400,000、Indirect Cost: ¥8,520,000); Fiscal Year 2010: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2009: ¥9,750,000 (Direct Cost: ¥7,500,000、Indirect Cost: ¥2,250,000); Fiscal Year 2008: ¥23,270,000 (Direct Cost: ¥17,900,000、Indirect Cost: ¥5,370,000)
• Keywords: 鹹水 / 沃素同位体比 / 塩素同位体比 / 希ガス / 付加体 / プレートテクトニクス / 希ガス濃度 / 地下水年代測定 / 海生有機物 / タービダイト / 溶存希ガス

Research Abstract

We collected brines from deep oil and natural gas reservoirs in forearc and backarc settings in the Japan arc and compared their ^<129>I/^<127>I, ^<36>Cl/Cl, dissolved noble gases and stable isotope (δD and δ^<18>O). We determined iodine ages of 22-53 Ma for brines from the backarc region by using an initial marine ^<129>I/^<127>I ratio of 1.5×10^<-12>. Because expansion of the Japan Sea started 25 Ma and ceased by 14 Ma, there is a great discrepancy between the iodine ages and the history of the formation of the Japan arc. We found no relationship between the ^<129>I/^<127>I ratio in deep brines and their tectonic settings.

Research Products

• [Journal Article] A multiple-isotope (δ^<37>Cl, ^<14>C, ^3H) approach to reveal the coastal hydrogeological system and its temporal changes in western Kyushu (2011)
  • Author(s): Tokunaga, T., Shimada, J., Kimura, Y., Inoue, D., Mogi, K., Asai, K.
  • Journal Title: Japan.Hydrogeol.J. 19 Pages: 249-258
  • Peer Reviewed
• [Journal Article] Radionuclide in ancient relics obtained from the Matsuzaki site and the Hirohata shellmound on the Pacific coast of Japan. (2010)
  • Author(s): Ohta T., Mahara Y., Kubota T., Saito Y., Fukutani S., Fujii T., Ando A., Nakata E., Nakano T., Abe Y., Tatematsu A.
  • Journal Title: Radiocarbon 52 Pages: 526-533
  • Peer Reviewed
• [Journal Article] Comparison of depth profile of 129I and 14C concentration in the surface layer of soils collected from North Eastern Japan. (2010)
  • Author(s): Hiroyuki Matsuzaki, Yoko Sunohara, Tsuchiya, Yasuyuki Muramatsu, Yuji Maejima, Yosuke Miyairi, Kazuhiro Kato
  • Journal Title: Radiocarbon 52 Pages: 1487-1497
  • Peer Reviewed
• [Journal Article] Radionuclide in ancient relics obtained from the Matsuzaki site and the Hirohata shellmound on the Pacific coast of Japan (2010)
  • Author(s): Ohta T., Mahara Y., Kubota T, 他
  • Journal Title: Radiocarbon Volume: 52 Pages: 526-533
  • Peer Reviewed
• [Journal Article] Comparison of depth profile of 129I and 14C concentration in the surface layer of soils collected from North Eastern Japan (2010)
  • Author(s): Matsuzaki H., Sunohara Y., 他
  • Journal Title: Radiocarbon Volume: 52 Pages: 56-66
  • Peer Reviewed
• [Journal Article] Vertical distribution of 10Be, 26Al, and 36Clin the surface soil layer of weathered granite at Abukuma, Japan (2010)
  • Author(s): Mahara Y., Hohjo K., 他
  • Journal Title: Nuclear Instruments and Methods in Physics Research B Volume: 268 Pages: 67-71
  • Peer Reviewed
• [Journal Article] Helium isotopic fingerprints of the heavy land subsidence left in groundwater of Saga Plain, near Beppu-Shimabara graben, Kyushu, Japan. (2009)
  • Author(s): Mahara Y., Kitaoka K.
  • Journal Title: Applied Geochemistry 24 Pages: 438-446
  • Peer Reviewed
• [Journal Article] Groundwater dating by estimation of groundwater flowvelocity and dissolved ^4He accumulation rate calibrated by ^<36>Cl in the Great Artesian Basin, Australia. (2009)
  • Author(s): Mahara Y., Habermehl M. A., Hasegawa T., Nakata K., Ransley T. R., Hatano T., Mizuochi Y., Kobayashi H., Ninomiya A., Senior B. R., Yasuda H., Ohta T.
  • Journal Title: Earth and Planetary Science Letters 287 Pages: 43-56
  • NAID: 120001645078
  • Peer Reviewed
• [Journal Article] Isotopic investigations for the origin of relic from the Matsuzaki site, Japan. (2009)
  • Author(s): Nakano-Ohta T., Kubota T., Ando A.,Fujii T., Fukutani S., Nakata E., Nakano T., Mahara Y.
  • Journal Title: Applied Radiation and Isotopes 67 Pages: 1479-1483
  • Peer Reviewed
• [Journal Article] Physical Properties of the Shallow Sediments in the Late Pleistocene Formations, the Ursa Basin, Gulf of Mexico, and their Implications for Generation and Preservation of Shallow Overpressures. (2009)
  • Author(s): Binh, N.T.T., Tokunaga, T., Nakamura, T., Kozumi, K., Nakajima, M., Kubota, M., Kameya, H., Taniue, M.
  • Journal Title: Mar.Petrol.Geol. 26 Pages: 474-486
  • Peer Reviewed
• [Journal Article] Groundwater dating by extimation of groundwater flow velocity and dissolved 4He accumulation rae calibrated (2009)
  • Author(s): Y.Mahara, M.A.Harbermehl, T.hasegawa, K.Nakata, T.R.
  • Journal Title: Earth and Planetary Science Letters 287 Pages: 43-56
  • Peer Reviewed
• [Journal Article] Separation of dissolved Kr from a water saple by means of a hollow fiber membrane (2009)
  • Author(s): T.Ohta, Y.Mahara, N.Momoshima, F.Inoue, J.Shimada, R.Ikawa,
  • Journal Title: Journal of Hydrology 376 Pages: 152-158
  • Peer Reviewed
• [Journal Article] Helium isotopic fingerprints of the Heavy land subsidence left in groun dwater of the Saga Plain, near Beppu-Shimabara graben, Kyushu, Japan (2009)
  • Author(s): Y.Mahara, K.Kitaoka
  • Journal Title: Applied Geochemistry 24 Pages: 438-446
  • Peer Reviewed
• [Journal Article] Correlation between dissolved ^4He concentration and ^<36>Cl in groundwater at Aspo, Sweden. (2008)
  • Author(s): Mahara Y., Hasegawa T., Miyakawa K, Ohta T.
  • Journal Title: Applied Geochemistry 23 Pages: 3305-3320
  • Peer Reviewed
• [Journal Article] Correlation between dissolved ^4He concentration and ^<36>Cl in groundwater at Aspo, Sweden (2008)
  • Author(s): Y.Mahara, T.Hasegawa, K.Miyakawa, T.Ohta
  • Journal Title: Applied Geochemistry 23 Pages: 3305-3320
  • Peer Reviewed
• [Presentation] Pore-water mobility : distribution of δ^<37>Cl, ^<36>Cl/Cl ratio and dissolved ^4He concentration in the core drilled in the Mobara Gas Field, Japan (2011)
  • Author(s): Mahara Y.
  • Organizer: Int.Conference of AMS-12
  • Place of Presentation: Wellington, New Zealand
  • Year and Date: 2011-03-23
• [Presentation] 塩素36と溶存希ガス測定による鹹水の滞留時間推定と沃素同位体比について (2010)
  • Author(s): 馬原保典、太田朋子、徳永朋祥、松崎浩之、長尾敬介
  • Organizer: 第11回環境放射能研究会
  • Place of Presentation: 高エネルギー加速器研究機構
  • Year and Date: 2010-03-03
• [Presentation] Comparison among brines ages estimated from ^<36>Cl/Cl ratio, concentration of dissolved ^4He and 129I/127I ratio, and the origin of iodine in the Mobara Gasd field, Japan. (2010)
  • Author(s): Mahara Y., Ohta T., Tokunaga T., Matsuzaki H., Nagao K., Nakata E.
  • Organizer: Proceedings of the 11th Workshop on Environmental Radioactivity(107-116)(in Japanese with English abstract)
  • Place of Presentation: KEK, Tsukuba, Japan.
• [Presentation] Observation of ^<228>Ra/^<226>Ra activity ratio, and concentrations of ^<226>Ra and 228Ra of surface seawaters in the Pacific side of Japan (2009)
  • Author(s): T.Ohta, T.Kubota, Y.Mahara, J.Sato
  • Organizer: APSORC2009
  • Place of Presentation: Napa, U.S.A.
  • Year and Date: 2009-11-30
• [Presentation] 環境試料中のヨウ素同位体(129I, 127I)の抽出手法の検討 (2009)
  • Author(s): 太田朋子、窪田卓見、馬原保典、松崎浩之、鈴木崇史
  • Organizer: 第2回JAEAタンデトロンAMSワークッショプ
  • Place of Presentation: JAEAむつ
  • Year and Date: 2009-11-13
• [Presentation] 我が国の鹹水中の沃素同位体比の分布と129Iの起源について (2009)
  • Author(s): 馬原保典、太田朋子、徳永朋祥、松崎浩之、長尾敬介
  • Organizer: 第2回JAEAタンデトロンAMSワークッショプ
  • Place of Presentation: JAEAむつ
  • Year and Date: 2009-11-12
• [Presentation] 我が国の鹹水中の沃素同位体比と沃素129の起源について (2009)
  • Author(s): 馬原保典
  • Organizer: 地下水学会秋季講演会
  • Place of Presentation: 北海道立道民活動センターかでる2.7
  • Year and Date: 2009-10-16
• [Presentation] 加速器質量分析と地球環境における同位体システム (2009)
  • Author(s): 松崎浩之
  • Organizer: 放射化学討論会
  • Place of Presentation: 日大文理学部
  • Year and Date: 2009-09-28
• [Presentation] 地下水中のKr-85の分離 (2009)
  • Author(s): 太田朋子、馬原保典、百島則幸、井上史士、谷口真人、井川怜欧、窪田卓見、嶋
  • Organizer: 放射化学討論会
  • Place of Presentation: 日大文理学部
  • Year and Date: 2009-09-28
• [Presentation] 129I-AMSによるヨウ素同位体システムの研究 (2009)
  • Author(s): 松崎浩之、村松康行、馬原保典、宮入陽介、渡辺聡、阿部恭子
  • Organizer: 地球化学会年会
  • Place of Presentation: 広島大学
  • Year and Date: 2009-09-17
• [Presentation] 日本各地の地下水中のヨウ素年代の測定と比較 (2009)
  • Author(s): 渡辺聡、松崎浩之、宮入陽介、村松康行、馬原保典
  • Organizer: 地球化学会年会
  • Place of Presentation: 広島大学
  • Year and Date: 2009-09-17
• [Presentation] 20世紀初頭に採取された海藻資料を用いた初期129I/127Iの検討 (2009)
  • Author(s): 宮入陽介、松崎浩之、近藤玲介
  • Organizer: 地球化学会年会
  • Place of Presentation: 広島大学
  • Year and Date: 2009-09-17
• [Presentation] Iodine isotopic ration of 129I/127I and the origin of 129I in brines, Japan. (2009)
  • Author(s): Mahara Y., Ohta T., Tokunaga T., Mastsuzaki H., Nagao K.
  • Organizer: Proccedings of the Second JAEA Tandetron AMS Utilization Workshop(19-25)(in Japanese with English abstract)
  • Place of Presentation: Mutsu-shi, Japan.
• [Presentation] Geochemical and paleohydorogical characteristics in fossil seawater, Japan (2008)
  • Author(s): 馬原保典
  • Organizer: XXXVI IAH Congress
  • Place of Presentation: Toyama international Conference Center
  • Year and Date: 2008-10-28
• [Presentation] Geochemical and paleohydrological characteristics in fossil seawater, Japan. (2008)
  • Author(s): Mahara Y.
  • Organizer: Proceedings of 36th IAH Congress
  • Place of Presentation: Toyama, Japan-Integrating Groundwater Science and Human Well-being (Invited Speaker)