Challenge to field mapping of sedimentary environment by field measurements of environmental radiation spectrum

• Project/Area Number: 23654171
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Geology
• Research Institution: Nagoya University
• Principal Investigator: TAKEUCHI Makoto 名古屋大学, 環境学研究科, 教授 (80273217)
• Project Period (FY): 2011 – 2013
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000); Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2011: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 地層 / γ線 / ジルコン / 堆積作用 / 後背地解析 / 矢作川 / モナザイト / 放射線スペクトル / 砕屑物 / 後背地

Research Abstract

In order to quantify the provenance analysis of clastics , I used the gamma-ray intensity on Th and K as data linking detritus and source rocks. On the measurement condition, I found that more than 40 cm depth, measurement time of 1000 seconds is practical in the sediment. In order to elucidate the relationship of sediment composition and geology of the provenance, the expected gamma-ray intensity calculated from the geology of the provenance was compared those of the river sediment in three rivers. As a result, the measured value was less uniformly in all three rivers on gamma-ray intensity on K. The measured value on Th was lower in samples originating from metamorphic rocks for Th. Th is included in the monazite and zircon. Because the grain size distribution of granite and metamorphic mineral of them are different, the behavior is different to sedimentology.

Research Products

• [Journal Article] Spatial distribution of 87Sr/86Sr ratios of stream sediments in Shikoku and the Kii Peninsula, Southwest Japan (2013)
  • Author(s): Jomori, Y., Minami, M, Ohta, A., Takeuchi, M. and Imai, N
  • Journal Title: Geochem. J. Volume: 47 Pages: 321-335
• [Journal Article] Detrital anisotropic grandite garnet as an indicator of denudation level of Permian volcanic arc in the provenance of the South Kitakami Belt, Northeast Japan. (2013)
  • Author(s): Takeuchi, M.
  • Journal Title: Island Arc. Volume: 22 Issue: 4 Pages: 477-493
  • DOI: 10.1111/iar.12043
  • Peer Reviewed
• [Journal Article] Provenance and origins of a Late Paleozoic accretionary complex within the Khangai–Khentei belt in the Central Asian Orogenic Belt, central Mongolia. (2013)
  • Author(s): Hara, H., Kurihara,T., Tsukada, K., Kon, Y., Uchino, T., Suzuki, T., Takeuchi, M., Nakane, Y., Manchuk N., Minjin C.
  • Journal Title: J. Asian Earth Sciences Volume: 75 Pages: 141-157
  • DOI: 10.1016/j.jseaes.2013.07.019
  • Peer Reviewed
• [Journal Article] patial distribution of 87Sr/86Sr ratios of stream sediments in Shikoku and the Kii Peninsula, Southwest Japan. (2013)
  • Author(s): Jomori, Y., Minami, M, Ohta, A., Takeuchi, M. and Imai, N.
  • Journal Title: Geochem. J. Volume: 47 Pages: 321-335
  • Peer Reviewed
• [Journal Article] Description of sandstones in the Ulaanbaatar area, Mongolia (2012)
  • Author(s): Suzuki, T., Nakane, Y., Bakhat, N., Takeuchi, M., Tsukada, K., Sersmaa, G., Khishigsuren, S. and Manchuk, N
  • Journal Title: Bull. Nagoya Univ. Museum Volume: No.28 Pages: 27-38
  • NAID: 120005284988
• [Presentation] 堆積物・堆積岩の源岩推定に対するγ線スペクトロメトリの適用性
  • Author(s): 片岡達也・竹内 誠・田中 剛
  • Organizer: 日本地質学会第120年学術大会講演要旨
• [Presentation] 富山県北東部下部白亜系手取層群の礫組成と砕屑性ジルコン年代分布からみた堆積盆の発達
  • Author(s): 竹内 誠・川原健太郎・冨田 覚
  • Organizer: 日本地質学会第120年学術大会講演要旨
• [Presentation] 西南日本におけるペルム紀砂岩中の砕屑性ザクロ石の化学組成と光学的性質からみた後背地の変遷
  • Author(s): 大川真弘・竹内 誠・松澤 希
  • Organizer: 日本地質学会第120年学術大会講演要旨
• [Presentation] 堆積物・堆積岩の源岩推定に対するγ線スペクトロメトリの適用性
  • Author(s): 片岡達也、竹内 誠、田中 剛
  • Organizer: 日本地質学会第120年学術大会
  • Place of Presentation: 東北大学
• [Presentation] 富山県北東部下部白亜系手取層群の礫組成と砕屑性ジルコン年代分布からみた堆積盆の発達
  • Author(s): 竹内 誠、川原健太郎、冨田 覚
  • Organizer: 日本地質学会第120年学術大会
  • Place of Presentation: 東北大学