後期太古代大気の酸素濃度上昇は連続的か突発的か？

2012 Fiscal Year Annual Research Report

• Project/Area Number: 23340155
• Research Institution: Niigata University
• Principal Investigator: M Satish‐Kumar 新潟大学, 自然科学系, 教授 (50313929)
• Co-Investigator(Kenkyū-buntansha): 外田 智千 国立極地研究所, 研究教育系, 准教授 (60370095)
• Project Period (FY): 2011-04-01 – 2015-03-31
• Keywords: 安定同位体 / 炭素同位体 / 太古代 / 大気酸素 / 硫化物 / フェムト秒レーザー / インド・ダールワールクラトン

Research Abstract

本研究では、インド・ダールワール岩体の堆積岩・低変成堆積岩の炭素・酸素および四種硫黄同位体の研究から、大気酸素上昇メカニズムとその原因、またそれはどのように起こったのか（長時間で連続的か短時間で突発的か）を明らかにすることを目的とする。本年度は、以下について検討を行った。
(1)昨年に引き続きダールワール岩体、チトラドゥルガ片岩帯の地質調査およびサンプリングを行った。周辺地域との比較のために、広範囲にわたって調査を実施した。野外で採取した試料は、薄片の観察を行った上で、いくつかのサンプルを厳選しEPMAによる分析を行った。
(2)チトラドゥルガ片岩帯から採取された、ストロマトライトを含む炭酸塩岩を用いて炭素・酸素同位体分析を行った。有機炭素のデルタ13Cは石英脈やラミナの見られる試料では、-16.0‰～-7.7‰、石英脈やラミナ見られない試料では、-23.6‰～-16.7‰，ストロマトライトを含む試料では、-19.8‰～-10.9‰となり，生物起源性を示す値が得られた。
(3)炭酸塩岩中の炭素質物質を抽出しラマン分光分析を行った。変成岩中の炭素質物質の特徴を確認するため、先行研究と比較したところ、ストロマトライトを含む試料のみ異なる傾向を示した。これは出発物質が、球状に近い構造を持つ生物起源のものである可能性を示唆する。
(4) 昨年に引き続き年代値を加えるために、研究分担者（外田）の所属する国立極地研究所において二次イオン質量分析計（SHRIMP）ならびに電子線マイクロプローブ（EPMA）を用いたジルコンおよびモナザイトのU-Th-Pb年代測定を実施した。これによって、太古代末期の詳細な年代時系列での同位体進化の解析が可能となる。

Current Status of Research Progress

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

Reason

インド・ダールワール岩体で採取したストロマトライトの炭素同位体データから生物起源性を示す値が得られた。過去に得られた同岩体の硫黄同位体のデータとあわせた解釈を行うことで、目標とする太古代末期の詳細な年代時系列での同位体進化の解析が可能との見通しが得られたため。

Strategy for Future Research Activity

本研究地域であるダールワール岩体における縞状鉄鉱層の化学的なデータは不足している。そこで縞状鉄鉱層の希土類元素組成、Sr・Nd同位体のデータを加えることで太古代末期の大気酸素上昇メカニズムを明らかにする。

Research Products

• [Journal Article] Supercooled melt inclusions in lower-crustal granulites as a consequence of rapid exhumation by channel flow (2014)
  • Author(s): Hiroi, Y., Yanagi, Y., Kato, M., Kobayashi, T., Prame, B., Hokada, T., Satish-Kumar, M., Ishikawa, M., Adachi, T., Osanai, Y., Motoyoshi, Y., & Shiraishi, K.
  • Journal Title: Gondwana Research Volume: 25 Pages: 226-234
  • DOI: 10.1016/j.gr.2013.04.001
  • Peer Reviewed
• [Journal Article] Comparison of the metamorphic history of the Monapo Complex, northern Mozambique and Balchefjella and Austhamaren areas, Sor Rondane Mountains, Antarctica: Implications for the Kuunga Orogeny and the amalgamation of N and S Gondwana. (2013)
  • Author(s): Grantham, G.H., Macey, P.H., Horie, K., Kawakami, T., Ishikawa, M., Satish-Kumar, M., Tsuchiya, N., Graser, P., & Azevedo, S.
  • Journal Title: Precambrian Research Volume: 234 Pages: 85-135
  • DOI: 10.1016/j.precamres.2012.11.012
  • Peer Reviewed
• [Journal Article] High-Mg low-Ni olivine cumulates from a Pan-African accretionary belt in southern India: Implications for the genesis of volatile-rich high-Mg melts in suprasubduction setting. (2013)
  • Author(s): Rajesh, V.J., Arai, S., Satish-Kumar, M., Santosh, M., and Tamura, A.
  • Journal Title: Precambrian Research Volume: 227 Pages: 409-425
  • DOI: 10.1016/j.precamres.2012.08.004
  • Peer Reviewed
• [Journal Article] An early Paleozoic tectonothermal event in western Mongolia: Implications for regional extension of the Cambrian orogenic belt. (2013)
  • Author(s): Owada, M., Osanai, Y., Nakano, N., Adachi, T., Yonemura, K., Yoshimoto, A., Satish-Kumar, M., Jargalan, S. and Boldbaatar, C.
  • Journal Title: Journal of Mineralogical and Petrological Sciences Volume: 106 Pages: 195-203
  • DOI: 10.2465/jmps.121021a
  • Peer Reviewed
• [Journal Article] An appraisal of Archaean supracrustal sequences in Chitradurga Schist Belt, Western Dharwar Craton, Southern India (2013)
  • Author(s): Hokada, T., Horie, K., Satish-Kumar, M., Ueno, Y., Nasheeth, A., Mishima, K. and Shiraishi, K.
  • Journal Title: Precambrian Research Volume: 227 Pages: 99-119
  • Peer Reviewed
• [Journal Article] Carbon isotope fractionation in the Fe-C system at HPHT experiments: Reply to the comment by Reutsky and Borzdov. (2013)
  • Author(s): Satish-Kumar, M., So, H., Yoshino, T., Kato, M. and Hiroi, Y.
  • Journal Title: Earth and Planetary Science Letters Volume: - Pages: 印刷中
  • Peer Reviewed
• [Journal Article] Late-Tonian to early-Cryogenian apparent depositional ages for metacarbonate rocks from the Sør Rondane Mountains, East Antarctica. (2013)
  • Author(s): Otsuji, N., Satish-Kumar, M., Kamei, A., Tsuchiya, N., Kawakami, T., Ishikawa, M. and Grantham, G.H.
  • Journal Title: Precambrian Research Volume: - Pages: 印刷中
  • DOI: 10.1016/j.precamres.2012.10.016
  • Peer Reviewed
• [Journal Article] Chlorine-rich fluid or melt activity during granulite facies metamorphism in the Late Proterozoic to Cambrian continental collision zone – an example from the Sør Rondane Mountains, East Antarctica. (2013)
  • Author(s): Higashino, F., Kawakami, T., Satish-Kumar, M., Ishikawa, M., Maki, K., Tsuchiya, N., Grantham, G.H. and Hirata, T.
  • Journal Title: Precambrian Research Volume: - Pages: 印刷中
  • DOI: 10.1016/j.precamres.2012.10.006
  • Peer Reviewed
• [Journal Article] Multiple thermal events recorded in metamorphosed carbonate and associated rocks from the southern Austkampane region in the Sør Rondane Mountains, East Antarctica: A protracted Neoproterozoic history at the Gondwana suture zone. (2013)
  • Author(s): Nakano, N., Osanai, Y., Kamei, A., Satish-Kumar, M., Adachi, T., Hokada, T., Baba, S. and Toyoshima, T.
  • Journal Title: Precambrian Research Volume: - Pages: 印刷中
  • DOI: 10.1016/j.precamres.2012.10.009
  • Peer Reviewed
• [Journal Article] Unraveling the metamorphic history at the crossing of Neoproterozoic orogens, Sør Rondane Mountains, East Antarctica: Constraints from U–Th–Pb geochronology, petrography, and REE geochemistry (2013)
  • Author(s): Hokada, T., Horie, K., Adachi, T., Osanai, Y., Nakano, N., Baba, S. and Toyoshima, T.
  • Journal Title: Precambrian Research Volume: - Pages: 印刷中
  • Peer Reviewed
• [Journal Article] Timing of metamorphism in the central Sør Rondane Mountains, eastern Dronning Maud Land, East Antarctica: Constrains from SHRIMP zircon dating and EPMA monazite dating (2013)
  • Author(s): Adachi, T., Osanai, Y., Hokada, T., Nakano, N., Baba, S., Toyoshima, T.
  • Journal Title: Precambrian Research Volume: - Pages: 印刷中
  • Peer Reviewed
• [Journal Article] Counterclockwise P-T path and isobaric cooling of metapelites from Brattnipene, Sør Rondane Mountains, East Antarctica: implications for a tectonothermal event at the proto-Gondwana margin (2013)
  • Author(s): Baba, S., Osanai, Y., Nakano, N., Owada, M., Hokada, T., Horie, K., Adachi, T., Toyoshima, T.
  • Journal Title: Precambrian Research Volume: - Pages: 印刷中
  • Peer Reviewed
• [Journal Article] Late Proterozoic juvenile arc metatonalite and adakitic intrusions in the Sør Rondane Mountains, eastern Dronning Maud Land, Antarctica (2013)
  • Author(s): Kamei, A., Horie, K., Owada, M., Yuhara, M., Nakano, N., Osanai, Y., Adachi, T., Hara, Y., Terao, M., Teuchi, S., Shimura, T., Tsukada, K., Hokada, T. et al.
  • Journal Title: Precambrian Research Volume: - Pages: 印刷中
  • Peer Reviewed
• [Journal Article] Contrasting metamorphic records and their implications for tectonic process in the central Sør Rondane Mountains, eastern Dronning Maud Land, East Antarctica (2013)
  • Author(s): Adachi, T., Hokada, T., Osanai, Y., Nakano, N., Baba, S. and Toyoshima, T.
  • Journal Title: In: Antarctica and Supercontinent Evolution, eds by S.L. Harley et al., Geological Society of London Special Publications, 383 Volume: - Pages: 印刷中
  • Peer Reviewed
• [Journal Article] Earth’s youngest exposed granite and its tectonic implications: the 10-0.8 Ma Kurobegawa Granite (2013)
  • Author(s): Ito, H., Yamada, R., Tamura, A., Arai, S., Horie, K. and Hokada, T.
  • Journal Title: Scientific Reports Volume: 3 Pages: -
  • DOI: DOI:10.1038/srep01306
  • Peer Reviewed
• [Journal Article] Petrogenesis of Cr-rich calc-silicate rocks from the Bandihalli Schist Belt, Archean Dharwar Craton, India. (2012)
  • Author(s): Taguchi, T., Satish-Kumar, M., Hokada, T. and Jayananda, M.
  • Journal Title: Canadian Mineralogist Volume: 50 Pages: 705-718
  • DOI: 10.3749/canmin.50.3.705
  • Peer Reviewed
• [Journal Article] Multiple origins of charnockite in the Mesoproterozoic Natal belt, Kwazulu-Natal, South Africa. (2012)
  • Author(s): Grantham, G.H., Mendonidis, P., Thomas R.J. and Satish-Kumar, M.
  • Journal Title: Geoscience Frontiers Volume: 3 Pages: 755-771
  • DOI: 10.1016/j.gsf.2012.05.006
  • Peer Reviewed
• [Journal Article] Preliminary results of field survey, petrography and geochemistry on the Chitradurga shear zone in the Hiriyur area, the Dharwar Craton, South India. (2012)
  • Author(s): Nasheeth, A., Okudaira, T., Satish-Kumar, M., Hokada, T. and Ueno, Y.
  • Journal Title: Journal of Geosciences, Osaka City University, Volume: 55 Pages: 43-52
• [Journal Article] Contrasting Archaean crustal records in western part of the Napier Complex, East Antarctica: New constraints from SHRIMP geochronology (2012)
  • Author(s): Horie, K., Hokada, T., Hiroi, Y., Motoyoshi, Y. and Shiraishi, K.
  • Journal Title: Gondwana Research Volume: 21 Pages: 829-837
  • Peer Reviewed
• [Presentation] 南インドダルワール地塊，チトラドゥルガ剪断帯の構造発達とパンアフリカ造山運動. (2012)
  • Author(s): Nasheeth, C.R.A., Okudaira, T., Hokada, T., Horie, K., Satish-Kumar, M., Ueno, Y. and Mishima, K.
  • Organizer: 日本地質学会第119年学術大会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 20120915-20120917
• [Presentation] Neoproterozoic orogens amalgamating East Gondwana: Did they cross each other? (2012)
  • Author(s): Satish-Kumar, M., Hokada, T., Osanai, Y., Owada, M. and Shiraishi, K.
  • Organizer: 日本地質学会第119年学術大会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 20120915-20120917
• [Presentation] Late-Tonian to early-Cryogenian apparent depositional ages for metacarbonate rocks from the Sor Rondane Mountains, East Antarctica. (2012)
  • Author(s): Otsuji, N., Satish-Kumar, M., Kamei, A., Tsuchiya, N., Kawakami, T., Ishikawa, M. and Grantham, G.H.
  • Organizer: 日本地質学会第119年学術大会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 20120915-20120917
• [Presentation] Metamorphic process recorded in pelitic gneisses in the Hanhohiyn Mountains, western part of Mongolia. (2012)
  • Author(s): 足立達朗・小山内康人・中野伸彦・大和田正明・Satish-Kumar M.・Jargalan Sereenen・Boldbaata Chimedtseye・米村和紘・吉本 紋
  • Organizer: 日本地質学会第119年学術大会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 20120915-20120917
• [Presentation] 太古代ダールワール岩体の片麻岩基盤に挟在される片岩帯の層序区分の再検討：SHRIMPジルコン年代による制約 (2012)
  • Author(s): 外田智千・堀江憲路・Satish-Kumar, M.・上野雄一郎・三島 郁・Nasheeth Abdulla・奥平敬元・白石和行
  • Organizer: 日本地質学会第119年学術大会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 20120915-20120917
• [Presentation] Experimental studies on carbon isotope fractionation in the deep Earth. (2012)
  • Author(s): Satish-Kumar, M., Yoshino, T., Mizutani, S., So, H. and Kato, M.
  • Organizer: 2012年度日本地球化学会第59回年会
  • Place of Presentation: 九州大学
  • Year and Date: 20120911-20120913
• [Presentation] Experimental studies on carbon isotope fractionation in the deep Earth. (2012)
  • Author(s): Satish-Kumar, M., Yoshino, T., Mizutani, S., So, H. and Kato, M.
  • Organizer: The 22nd V.M. Goldschmidt Conference
  • Place of Presentation: Montreal, Canada
  • Year and Date: 20120624-20120629
• [Presentation] Chlorine-rich fluid in granulite facies continental collision zone. (2012)
  • Author(s): Higashino, F., Kawakami, T., Satish-Kumar, M., Ishikawa, M., Maki, K., Tsuchiya, N., Grantham, G.H. and Hirata, T.
  • Organizer: The 22nd V.M. Goldschmidt Conference
  • Place of Presentation: Montreal, Canada
  • Year and Date: 20120624-20120629
• [Presentation] The chlorine-rich fluid activity during granulite facies metamorphism in the continental collision zone. (2012)
  • Author(s): Higashino, F., Kawakami, T., Satish-Kumar, M., Ishikawa, M., Maki, K., Tsuchiya, N., Grantham, G.H. and Hirata, T.
  • Organizer: 日本地球惑星科学連合2012年大会
  • Place of Presentation: 幕張メッセ 国際会議場(千葉市)
  • Year and Date: 20120520-20120525
• [Presentation] Petrology and geochronology of metamorphic rocks in the Bayankhongor area, the central part of Mongolia. (2012)
  • Author(s): Adachi, T., Osanai, Y., Nakano, N., Owada, M., Satish-Kumar, M., Jargalan, S., Boldbaatar, C., Yonemura, K. and Yoshimoto, A.
  • Organizer: 日本地球惑星科学連合2012年大会
  • Place of Presentation: 幕張メッセ 国際会議場(千葉市)
  • Year and Date: 20120520-20120525
• [Presentation] Unravelling metamorphic-fluid events in Gondwana collision: U-Th-Pb constraints from Sør Rondane mountains, Antarctica
  • Author(s): 外田智千・堀江憲路・足立達朗・小山内康人・中野伸彦・馬場壮太郎・豊島剛志
  • Organizer: 日本地球惑星科学連合2012年大会
  • Place of Presentation: 幕張メッセ 国際会議場(千葉市)
• [Presentation] Neoproterozoic-Cambrian metamorphic-fluid-time regimes in central Sor Rondane Mountains, East Antarctica
  • Author(s): Hokada, T., Horie, K., Adachi, T., Osanai, Y., Nakano, N., Baba, S., Toyoshima, T.
  • Organizer: 34th International Geological Congress
  • Place of Presentation: ブリスベン国際会議場
• [Presentation] Comparison of chemically estimated depositional ages with zircon SHRIMP ages from metacarbonate rocks in the Sør Rondane Mountains, East Antarctica.
  • Author(s): Otsuji, N., Satish-Kumar, M., Hokada, T., Horie, K., Kamei, A., Grantham, G.H., Tsuchiya, N., Kawakami, T. and Ishikawa, M.
  • Organizer: 第32回極域地学シンポジウム
  • Place of Presentation: 国立極地研究所
• [Presentation] Timing of chlorine-rich fluid infiltration and behavior of REE-bearing minerals from Balchenfjella, Sør Rondane Mountains, East Antarctica.
  • Author(s): Higashino, F., Kawakami, T., Satish-Kumar, M., Tsuchiya, N., Ishikawa, M. and Grantham, G.H.
  • Organizer: 第32回極域地学シンポジウム
  • Place of Presentation: 国立極地研究所
• [Presentation] Chlorine-rich fluid activity during retrograde metamorphism – an example from Brattnipane, Sør Rondane Mountains, East Antarctica.
  • Author(s): Kawakami, T., Higashino, F., Tsuchiya, N., Satish-Kumar, M., Ishikawa, M. and Grantham, G.H.
  • Organizer: 第32回極域地学シンポジウム
  • Place of Presentation: 国立極地研究所
• [Presentation] Evolution of Chitradurga Shear Zone; Some insights to the current interpretations in the tectonic context of Dharwar Craton, South India.
  • Author(s): Nasheeth, A., Okudaira, T., Hokada, T., Horie, H., Satish-Kumar, M. and Ueno, Y.
  • Organizer: 第32回極域地学シンポジウム
  • Place of Presentation: 国立極地研究所
• [Presentation] Tectonic significance of “felsite inclusions” found in granulites from continental collision orogens worldwide, including the Lützow-Holm Complex of East Antarctica
  • Author(s): Hiroi, Y., Yanagi, A., Kato, M., Kobayashi, T., Prame, B., Hokada, T., Satish-Kumar, M., Ishikawa, M., Motoyoshi, Y. and Shiraishi, K.
  • Organizer: 第32回極域地学シンポジウム
  • Place of Presentation: 国立極地研究所
• [Presentation] 東南極セールロンダーネ山地における原生代末期の変成-流体イベント：U-Pb年代および希土類元素からの制約
  • Author(s): 外田智千・堀江憲路・小山内康人・中野伸彦・足立達朗・豊島剛志・馬場壮太郎
  • Organizer: 第32回極域地学シンポジウム
  • Place of Presentation: 国立極地研究所