Study of volcanic eruptions inferred byphenocrysts and groudmass.

• Project/Area Number: 22540466
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Geology
• Research Institution: Shinshu University
• Principal Investigator: MIYAKE Yasuyuki 信州大学, 理学部, 教授 (70200144)
• Co-Investigator(Kenkyū-buntansha): MAKINO Kuniaki 信州大学, 理学部, 教授 (30242712)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2010: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 火山噴火 / 石基 / 浅間火山 / 美ヶ原火山岩類 / 水中火砕流 / 美ヶ原高原 / 角閃石デイサイト / ユータキシティック組織 / 斑晶 / 石基ガラス / マイクロFT-IR / 浅間山 / 美ヶ原 / 火山爆発 / 斑晶と石基 / 塩嶺層群 / マイクロライトのCSD / 含水率

Research Abstract

The groundmass texture and water contents of groundmass glass in the ejecta of Asama volcano 2004-eruption were studied. As a conclusion, the magma column before the eruption (vent）reached longer than 180m, the diameter being several meters. Also, the groundmass textures in the pumice flow deposits in Utsukushigahara volcanics are studied.

Research Products

• [Journal Article] The analyses of the vulcanian eruption products based on combination of the IKONOS high-resolution satellite imagery and the field survey: (2011)
  • Author(s): 阪上雅之・佐々木寿・三宅康幸・向山栄
  • Journal Title: The Journal of the Geological Society of Japan Volume: 117 Issue: 12 Pages: 671-685
  • DOI: 10.5575/geosoc.2011.0012
  • NAID: 130001915385
  • ISSN: 0016-7630, 1349-9963
  • Year and Date: 2011-12-15
  • Peer Reviewed
• [Journal Article] Quaternary volcanism and tectonic history of the Suwa-Yatsugatake Volcanic Province (2011)
  • Author(s): Nishiki,K, Takahashi,K., Matsumoto,A. and Miyake,Y.
  • Journal Title: Central Japan. Jour. Volcanol. Geotherm. Res. Volume: 203 Pages: 158-167
  • Peer Reviewed
• [Journal Article] IKONOS 高分解能衛星画像と現地踏査を併用したブルカノ式噴火噴出物の解析-浅間火山2004 年 9 月 1 日噴火を例に- (2011)
  • Author(s): 阪上雅之・佐々木 寿・三宅康幸・向山 栄
  • Journal Title: 地質学雑誌 Volume: 117 Pages: 671-685
  • NAID: 130001915385
  • Peer Reviewed
• [Journal Article] (in print) Quaternary volcanism and tectonic history of the Suwa-Yatsugatake Volcanic Province, Central Japan.
  • Author(s): Nishiki, K, Takahashi, K., Mats umoto, A., Miyake, Y.
  • Journal Title: Jour.Volcanol.Geotherm.Res. Volume: (in print)
  • Peer Reviewed
• [Presentation] 長野県佐久市およびその北方に分布する岩尾層について-高峯山周辺を起源とする岩屑なだれ堆積物である可能性. (2012)
  • Author(s): 三宅康幸・内掘俊佑・西前健一・藤原幸介
  • Organizer: 日本火山学会 2012 年秋季大会
  • Place of Presentation: 御代田町
• [Presentation] 長野県佐久市およびその北方に分布する岩尾層について (2012)
  • Author(s): 三宅康幸
  • Organizer: 日本火山学会
  • Place of Presentation: 御代田町