New developments in geo-thermometry based on quantitative oxygen analysis using a microprobe to estimate iron oxidation ratio

• Project/Area Number: 19540503
• 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: Nagoya University
• Principal Investigator: WALLIS R.simon Nagoya University, 大学院・環境学研究科, 准教授 (30263065)
• Co-Investigator(Kenkyū-buntansha): KATO Takenori 年代測定総合研究センター, 准教授 (90293688)
• Project Period (FY): 2007 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000); Fiscal Year 2009: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2008: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2007: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: 酸素 / EPMA / 微小領域分析 / 岩石学温度計 / 微少領域分析 / 岩石学的温度計 / エクロジャイト / 輝石 / 酸素定量分析 / 地質損時計 / 石榴石

Research Abstract

Uncertainty in the oxidation state of iron in pyroxene leads to significant uncertainties in estimating the temperature of the inner earth. Oxygen is the only anion in pyroxene and assuming electrical balance, accurate measurements of cation contents allow the iron oxidation ratio to be estimated. Oxygen measurements using EPMA were optimized by examining the analyzing crystal, sample surface, ways of identifying the background, and appropriate correction factors. We are now able to determine the weight percentage of oxygen to within one percent.

Research Products

• [Journal Article] 東赤石岩体-アンチゴライトとカンラン岩の変形に関する天然の実験結果 (2010)
  • Author(s): Wallis, S.・水上知行
  • Journal Title: 月刊地球 volume32 Pages: 2-8
• [Journal Article] Subduction of mantle wedge peridotites: Evidence from the Higashi-akaishi ultramafic body in the Sanbagawa metamorphic belt. (2010)
  • Author(s): Hattori, J., Wallis, S.R., Enami, M., Mizukami, T.
  • Journal Title: Island Arc 19 Pages: 192-207
• [Journal Article] Subduction of mantle wedge peridotites : Evidence from the Higashi-akaishiultramafic body in the Sanbagawa metamorphic belt (2010)
  • Author(s): Hattori, J., Wallis, S.R., Enami, M., Mizukami, T.
  • Journal Title: Island Arc 19 Pages: 192-207
  • Peer Reviewed
• [Journal Article] Age and early metamorphic history of the Sanbagawa belt: Lu-Hf and P-T constraints from the Western Iratsu eclogite. (2009)
  • Author(s): Endo, S., Wallis, S., Hirata, T. Anczkiewicz, R., Platt, J., Thirlwall, M., Asahara, Y.
  • Journal Title: Journal of Metamorphic Geology 27 Pages: 371-384
• [Journal Article] High-P metamorphi-sm, pattern of induced flow in the mantlewedge, and the link with plutonism in paired metamorphic belts. (2009)
  • Author(s): Aoya, M., Mizukami, T., Uehara, S.-I., Wallis, S.R.
  • Journal Title: Terra Nova 21 Pages: 67-73
• [Journal Article] Plate movements, ductile deformation and geochronology of theSanbagawa belt, SW Japan: tectonic significance of 89-88 Ma Lu-Hf eclogite ages. (2009)
  • Author(s): Wallis, S.R., Anczkiewicz, R., Aoya, M., Platt, J.P., Thirlwall, M., Hirata, T.
  • Journal Title: Journal of Metamorphic Geology 27 Pages: 93-105
• [Journal Article] Age and early metamorphic history of the Sanbagawa belt : Lu-Hf and P-T constraints from the Western Iratsu eclogite (2009)
  • Author(s): Endo, S., Wallis, S., Hirata, T.Anczkiewicz, R., Platt, J., Thirlwall, M., Asahara, Y.
  • Journal Title: Journal of Metamorphic Geology 27 Pages: 371-384
  • Peer Reviewed
• [Journal Article] High-P metamorphism, pattern of induced flow in the mantle wedge, and the link with plutonism in paired metamorphic belts. (2009)
  • Author(s): Aoya, M., Mizukami, T., Uehara, S.-1., Wallis, S.R.
  • Journal Title: Terra Nova 21 Pages: 67-73
  • Peer Reviewed
• [Journal Article] Plate movements. ductile deformation and geochronology of the Sanbagawa belt, SW Japan : tectonic significance of 89-88 Ma Lu-Hf eclogite ages (2009)
  • Author(s): Wallis, S. R.
  • Journal Title: Journal of Metamorphic Geology 27 Pages: 93-105
  • Peer Reviewed
• [Journal Article] High-P metamorphism, pattern of induced flow in the mantle wedge, and the link with plutonism in paired metamorphic belts (2009)
  • Author(s): Aoya, M.
  • Journal Title: Terra Nova 21 Pages: 67-73
  • Peer Reviewed
• [Journal Article] Plate movements, ductile deformation and geochronology of the Sanbagawa belt, SW Japan: tectonic significance of 89-88 Ma Lu-Hf eclogite ages (2009)
  • Author(s): Wallis, S. R.
  • Journal Title: Journal of Metamorphic Geology 27 Pages: 93-105
  • Peer Reviewed
• [Journal Article] High-P metamorphism, pattern of induced flow in the mantle we dge, and the link with plutonism in paired metamorphic belts (2009)
  • Author(s): Aoya, M.
  • Journal Title: Terra Nova 21 Pages: 67-73
  • Peer Reviewed
• [Journal Article] Forearc diamond from Japan. (2007)
  • Author(s): Mizukami, T., Wallis, S. R, Enami, M., Kagi, H.
  • Journal Title: Geology 36 Pages: 219-222
• [Presentation] Quantitative electron probe microanalysis of oxygen in rock-forming minerals. (2010)
  • Author(s): 加藤丈典・ウォリスサイモン
  • Organizer: 変成岩などシンポジウム
  • Place of Presentation: 広島
  • Year and Date: 2010-03-20
• [Presentation] Quantitative electron probe microanalysis of oxygen in rock-forming minerals (2010)
  • Author(s): 加藤丈典・ウォリス サイモン
  • Organizer: 変成岩などシンポジウム
  • Place of Presentation: 広島
  • Year and Date: 2010-03-20
• [Presentation] Two distinct phases of subduction metamorphism in the Sanbagawa belt: Evidence from Lu-Hf geochronology and geothermobarometry for the Western Iratsu eclogite. (2009)
  • Author(s): Endo, S., Wallis, S.R., Anczkiewicz, R.
  • Organizer: American Geophysical Union fall meeting
  • Place of Presentation: San Francisco
  • Year and Date: 2009-12-01
• [Presentation] Two distinct phases of subduction metamorphism in the Sanbagawa belt : Evidence from Lu-Hf geochronology and geothermobarometry for the Western Iratsu eclogite. (2009)
  • Author(s): Endo, S., Wallis, S. R., Anczkiewicz, R.
  • Organizer: American Geophysical Union fall meeting 2009
  • Place of Presentation: San Francisco
  • Year and Date: 2009-12-01
• [Presentation] 四国三波川帯・西部五良津岩体のP-T-t経路:チタナイトを含む鉱物共生からの制約. (2009)
  • Author(s): 遠藤俊祐, ウォリス・サイモン
  • Organizer: 日本地質学会第116年学術大会
  • Place of Presentation: 岡山理科大
  • Year and Date: 2009-09-01
• [Presentation] Structural petrology in the Sanbagawa bellt and tectonic models-the importance of albite porphyroblasts as tectonic markers(Invited) (2009)
  • Author(s): ウォリス・サイモン・青矢睦月
  • Organizer: 日本地質学会第116年学術大会
  • Place of Presentation: 岡山理科大
  • Year and Date: 2009-09-01
• [Presentation] 四国三波川帯・西部五良津岩体のP-T-t経路 : チタナイトを含む鉱物共生からの制約. (2009)
  • Author(s): 遠藤俊祐, ウォリス・サイモン
  • Organizer: 日本地質学会第116年学術大会
  • Place of Presentation: 岡山理科大
  • Year and Date: 2009-09-01
• [Presentation] ザクロ石中のLu及びHfの分布-Lu-Hf年代解釈における重要性 (2008)
  • Author(s): 遠藤俊佑Wallis, S.R.浅原良浩平田岳史Anczkiewicz, R.
  • Organizer: 日本地質学会
  • Place of Presentation: 秋田
  • Year and Date: 2008-09-22
• [Presentation] 三波川帯東赤石岩帯周辺のザクロ石中石英包有物の残留圧力 (2008)
  • Author(s): 水上知行榎並正樹毛利崇ウォリス・サイモン
  • Organizer: 地質学会
  • Place of Presentation: 秋田
  • Year and Date: 2008-09-22
• [Presentation] ザクロ石中のLu及びHfの分布-Lu-Hf年代解釈における重要性 (2008)
  • Author(s): 遠藤俊佑
  • Organizer: 日本地質学会
  • Place of Presentation: 秋田大学
  • Year and Date: 2008-09-22
• [Book] Microchronology and microgeochemistry: problems, perspectives and geological applications (2009)
  • Author(s): Itaya, T., Wallis, S. R. (ed.)
  • Publisher: Island Arc