Partial melting of the crust caused by heating of basalt magma-Generation of felsic magma in the subduction zone

• Project/Area Number: 20540463
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Petrology/Mineralogy/Science of ore deposit
• Research Institution: Niigata University
• Principal Investigator: SHUTO Kenji Niigata University, 自然科学系, フェロー (50143748)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2010: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2009: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2008: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
• Keywords: アセノスフェア / リソスフェア / 下部地殻 / 部分溶融 / 玄武岩 / フェルシック火山岩 / 西南北海道 / 北部北海道 / Sr同位体比 / Nd同位体比 / 流紋岩 / 下部地殼 / REE / 玄武岩マグマ / フェルシックマグマ / 北海道北部

Research Abstract

The major- and trace-element compositions, and Sr and Nd isotopic data were presented for Oligocene to Quaternary basaltic and felsic volcanic rocks including dacite and rhyolite from Southwest Hokkaido and North Hokkiado. These data showed that felsic magmas were generated by partial melting of the lower crustal rocks beneath SW Hokkaido and North Hokkaido. Asthenosphere-derived basaltic magmas have both been erupted at the surface, and fluxed and heated the lower crust causing melting, and producing coeval felsic magmas.

Research Products

• [Journal Article] Origin of Late Paleogene to Neogene basalts and associated coeval felsic volcanic rocks in Southwest Hokkaido, northern NE Japan arc : constraints from Sr and Nd isotopes and major- and trace- element chemistry. (2011)
  • Author(s): Takanashi, K., Shuto,K., Sato,M.
  • Journal Title: Lithos (accepted for publication).
  • Peer Reviewed
• [Journal Article] Effect of subduction components on production of basalts from Tateshina volcano, central Japan : geochemical calculation of dehydration of subducting oceanic crust and partial melting of overlying sediments, and subsequent fluid-mantle interaction. (2009)
  • Author(s): Katoh, M., Shuto,K.
  • Journal Title: Journal of Mineralogical and Petrological Sciences 107 Pages: 132-147
  • NAID: 10024980506
  • Peer Reviewed
• [Journal Article] Middle Miocene back- arc volcanism in the Tappi-zaki area, Northeast Japan arc : plagioclase K-Ar age constraints. (2009)
  • Author(s): Watanabe, N., Itaya, T., Ohki,J., Shuto,K.
  • Journal Title: Science Reports of Niigata University Series E(Geology) No.24 Pages: 91-108
  • NAID: 120006741697
  • Peer Reviewed
• [Journal Article] 新潟油・ガス田地域の中新世火山岩と海水の相互作用-石油・天然ガスを胚胎する火山岩のSrおよびNd同位体比-. (2008)
  • Author(s): 周藤賢治・佐藤誠・大木淳一
  • Journal Title: 石油技術協会誌 73 Pages: 517-530
  • NAID: 10024652166
  • Peer Reviewed
• [Journal Article] Petrology and geochemistry of Miocene igneous rocks on Rebun Island, northern Hokkaido, Japan. (2008)
  • Author(s): Hirahara, Y., Shuto,K.
  • Journal Title: Journal of Mineralogical and Petrological Sciences 103 Pages: 412-426
  • NAID: 10024654728
  • Peer Reviewed
• [Journal Article] Petrology and geochemistry of Miocene igneous rocks on Rebun Island, northern Hokkaido (2008)
  • Author(s): 平原由香, 周藤賢治
  • Journal Title: J.Mineral.Petrol.Sci 103 Pages: 412-426
  • Peer Reviewed
• [Presentation] 北部北海道置戸西方の鮮新世火山岩におけるマグマ混合の記載岩石学的研究. (2010)
  • Author(s): 佐藤典・周藤賢治
  • Organizer: 日本地質学会第117年学術大会
  • Place of Presentation: 富山大会
• [Presentation] 北部北海道,北部北海道,中期～後期中新世フェルシック火山岩におけるSr Nd同位体組成の多様性. (2009)
  • Author(s): 高梨幸志郎・周藤賢治
  • Organizer: 日本地質学会第116年学術大会
  • Place of Presentation: 岡山大会
• [Book] 東北日本弧-日本海の拡大とマグマの生成. (2009)
  • Author(s): 周藤賢治
  • Total Pages: 236
  • Publisher: 共立出版
• [Book] 東北日本弧-日本海の拡大とマグマの生成- (2009)
  • Author(s): 周藤賢治
  • Total Pages: 236
  • Publisher: 共立出版