沈み込む太平洋プレートの岩石学的多様性と火山弧のレスポンス

2012 Fiscal Year Annual Research Report

• Project/Area Number: 24340136
• Research Category: Grant-in-Aid for Scientific Research (B)
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: 木村 純一 独立行政法人海洋研究開発機構, 地球内部ダイナミクス領域, チームリーダー (30241730)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: マグマ / 火成岩

Research Abstract

北西太平洋の海洋掘削試料・海山試料の岩石記載・全岩主成分・微量成分組成の分析を実施した.分析した試料は,海洋掘削試料のODP303(3:括弧内は試料数),304(3),197(2)サイト,ならびにIODP1179(6)サイトの玄武岩海洋地殻,海山では襟裳海山(1),堀田海山(10),第一鹿島海山(1),択洋第二海山(1),ならびにODPサイト197の周辺の海山試料(3),新生代の小規模火山(プチスポット)の海洋地殻ガブロゼノリス(1)ならびに玄武岩マグマ(10)の41試料である.主成分元素と微量成分元素の特徴をもとに,マグマの生成環境(温度・圧力・揮発成分含有量など)および起源物質(起源マントルの化学組成)の検討を行った.検討の結果を米国地球物理学連合秋季大会で公表した.関連論文として,マグマを発生するマントルでおこる融解現象の多様性(Kimura and Sano, 2012),東北日本弧のマグマの多様性(Yamada et al., 2012 Resource Geology; Takahashi et al., 2012, Journal of Petrology),島弧間の比較のためクリル弧とサンギへ弧の火山岩の多様性とその成因(Martynov et al., 2012, Petrology; Hanyu et al, 2012, Geochemistry Geophysics Geosystems)ならびに,元素分析法の開発(Kimura and Chang, 2012, JAAS)をいずれも著名国際誌に出版した.

Current Status of Research Progress

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

Reason

計画した試料の分析を終了し,分析結果について検討を実施して,成果を国際会議で公表した.

Strategy for Future Research Activity

平成24年度に分析した火山岩試料のSr-Nd-Hf-Pb同位体分析を実施する.得られた成果をとりまとめ,国際会議で成果報告を行う.

Expenditure Plans for the Next FY Research Funding

予定していた試薬の使用量が予定より少なかったため,繰り越しが生じた.当該予算は次年度公表予定である論文の投稿料に充てる予定である.

Research Products

• [Journal Article] Reactive melt flow as the origin of residual mantle lithologies and basalt chemistries in mid-ocean ridges : Implications from the Red Hills peridotite, New Zealand (2012)
  • Author(s): Kimura J.-I. and Sano S.
  • Journal Title: Journal of Petrology Volume: 53 Pages: 1637-1671
  • DOI: 10.1093/petrology/egs028
  • Peer Reviewed
• [Journal Article] Indian MORB-type mantle beneath the Kuril Island arc : Isotopic investigation of the mafic lavas of Kunashir Island (2012)
  • Author(s): Martynov A.Y., Kimura J.-I., Martynov Y.A., Katakuse M., Rybin, A.V.
  • Journal Title: Petrology Volume: 20 Pages: 102-110
  • Peer Reviewed
• [Journal Article] Chemical and isotopic characteristics of Kuroko-forming volcanism (2012)
  • Author(s): Yamada R., Yoshida T., and Kimura J.-I.
  • Journal Title: Resource Geology Volume: 62 Pages: 369-383
  • DOI: 10.1111/j.1751-3928.2012.00202.x
  • Peer Reviewed
• [Journal Article] Origin of suppressed matrix effect for improved analytical performance in determination of major and trace elements in anhydrous silicate sampies using 200-nm femtosecond laser ablation sector-field inductively coupled plasma mass spectrometry. (2012)
  • Author(s): Kimura J.-I. and Chang Q.
  • Journal Title: Journal of Analytical Atomic Spectrometry Volume: 27 Pages: 1549-1559
  • DOI: 10.1039/C2JA10344C
  • Peer Reviewed
• [Journal Article] Primary magmas at the volcanic front of NE Japan arc : Coeval eruption of crustal low-K tholeiitic and mantle-derived medium-K calc-alkaline basalts at Azuma volcano (2012)
  • Author(s): Takahashi T., Hirahara Y., Miyazaki T., Senda K., Chang Q., Kimura J.-I., and Tatsumi Y.
  • Journal Title: Journal of Petrology Volume: 54 Pages: 103-148
  • DOI: 10.1093/petrology/egs065
  • Peer Reviewed
• [Journal Article] Across- and along-arc geochemical variations of lava chemistry in Sangihe arc : Various fluid and melt slab fluxes in response to slab temperature. (2012)
  • Author(s): Hanyu T., Gill J.B., Tatsumi Y, Kimura J.-I., Sato K., Chang Q., Senda R., Miyazaki T., Hirahara Y., Takahashi T, Zulkarnain I.
  • Journal Title: Geochemistry Geophysics Geosystems Volume: 13
  • DOI: 10.1029/2012GC004346
  • Peer Reviewed
• [Presentation] Origin of co-existing basalts, high-Mg andesites, and adakites in the sw Japan hot subduction system (2012)
  • Author(s): Jun-Ichi Kimura, et al. (9名)
  • Organizer: American Geophysical Union Fall Meeting
  • Place of Presentation: Mosconi Center, San Francisco, USA
  • Year and Date: 2012-12-07