主要重鉱物のマルチ同位体初生値を用いた砕屑性岩の高精度分類とその地質学的応用展開

• Project/Area Number: 18H01316
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 17040:Solid earth sciences-related
• Research Institution: Kyushu University
• Principal Investigator: 中野 伸彦 九州大学, 比較社会文化研究院, 准教授 (20452790)
• Co-Investigator(Kenkyū-buntansha): 足立 達朗 九州大学, 比較社会文化研究院, 助教 (00582652) ; 亀井 淳志 島根大学, 学術研究院環境システム科学系, 教授 (60379691)
• Project Period (FY): 2018-04-01 – 2022-03-31
• Project Status: Granted (Fiscal Year 2021)
• Budget Amount: ¥14,820,000 (Direct Cost: ¥11,400,000、Indirect Cost: ¥3,420,000); Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2020: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000); Fiscal Year 2019: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2018: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
• Keywords: ジルコン / アパタイト / モナズ石 / 同位体比 / LA-MC-ICP-MS / マルチ同位体比 / TIMS / 砕屑性岩 / MC-ICP-MS

Outline of Annual Research Achievements

昨年度までに，レーザーアブレーションマルチコレクタ誘導結合プラズマ質量分析計（LA-MC-ICP-MS）をもちいて，レーザー径25ミクロンでのモナズ石の局所Nd同位体比分析を行うことが可能となった．また，分析手法の精査を繰り返すことで，その誤差は表面電離型質量分析計 (TIMS)を用いたNd同位体比の誤差と同程度まで精度を上げることに成功した．加えて，天然の花崗岩類から分離したモナズ石のNd同位体比初生値が，花崗岩の全岩Nd同位体比初生値とほぼ同様の値をしめすことが確認された．つまり，ジルコンのU-Pb年代とHf同位体比を目的としたジルコン分離の際に，ジルコンとともに濃集するモナズ石のNd同位体比を測定することで，非常に簡便にマルチ同位体比を用いた成因の議論が可能となることが検証できた．
また，アパタイトのSr同位体比分析については分析手法の改良を行い，標準試料アパタイトに関しては，65ミクロン径を用いて非常に高精度な測定（±0.00003程度）が可能となった．しかしながら天然の花崗岩類中のアパタイトは，斜長石などの他のSrを多く含む鉱物と共生するため，Sr含有量が著しく低い．そのためこの精度での分析が困難であることが判明したため，今年度さらなる改良が必要である．
以上の結果から，今年度までにジルコン・モナズ石・アパタイトの重鉱物分離～マウント～SEM/BSE/CL像での観察～同位体分析までの一連のルーチンをおおよそ確立したといえる．これらの成果に加えて，今後分析を予定する地域を含めた国内外の様々な地質体についての成果をまとめ，国内・国際誌に発表するとともに，最新データについては多くの国内外での学会やシンポジウムで発表した．

Current Status of Research Progress

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

Reason

当初予定通り，モナズ石のNd同位体比分析を含めたマルチ同位体比分析のルーチンを確立したため．

Strategy for Future Research Activity

昨年度から行っているアパタイトのSr同位体比の測定手法の改良によって，測定精度は大幅に向上したが，1点ごとの測定誤差はまだ大きい．砕屑性ジルコンのように1粒子ごと（1点ごと）に評価が必要な分析では，さらなる精度の向上を図る必要があり，既に複数の天然の花崗岩試料から分離済みのアパタイトを用いて，分析精度の向上を行う．
それに加えて，既存試料を用いた砕屑性ジルコンやモナズ石の分析を行う．これらの分析の過程で，必要に応じ分離した試料のTIMS分析を行い，LA-MC-ICP-MSとのデータの整合性のチェックを行う．対象試料はこれまでの研究で採取したベトナム，モンゴル，および三郡帯等の試料であり，アジアを特徴づける約450 Maの砕屑性ジルコンを含む地質体をターゲットとする．これらの地域の砕屑性岩を対象として，ジルコン，モナズ石の年代頻度とジルコン，モナズ石，アパタイトから得られた各同位体比初生値を関連づけ，Hf・Nd・Sr同位体比初生値から砕屑性物の起源を精密分類することを目指す．
また，これらのマルチ同位体比を用いた東西ゴンドワナ大陸の復元を目的として，本年度第62次日本南極地域観測隊として，南極・リュッツォホルム湾周辺での調査および試料採取を行う予定である．

Research Products

• [Int'l Joint Research] ベトナム地質鉱物資源研究所/ベトナム地質調査所(ベトナム)
• [Int'l Joint Research] モンゴル科学技術大学/中央地質研究所(モンゴル)
• [Journal Article] Timing of high-grade metamorphism in the Kontum Massif, Vietnam: Constraints from zircon-monazite multi-geochronology and trace elements geochemistry of zircon-monazite-garnet (2020)
  • Author(s): Bui Vuong Thi Sinh、Osanai Yasuhito、Nakano Nobuhiko、Adachi Tatsuro、Kitano Ippei、Owada Masaaki
  • Journal Title: Journal of Asian Earth Sciences Volume: 187 Pages: 104084-104084
  • DOI: 10.1016/j.jseaes.2019.104084
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Timing of magmatism and ultrahigh- to high-grade metamorphism in the Kannak Complex, Kon Tum Massif, Vietnam: Magmatic activity and its tectonic implications (2020)
  • Author(s): Owada Masaaki、Osanai Yasuhito、Nakano Nobuhiko、Kitano Ippei、Adachi Tatsuro、Binh Pham、Tri Tran Van
  • Journal Title: Journal of Asian Earth Sciences Volume: 195 Pages: 104077-104077
  • DOI: 10.1016/j.jseaes.2019.104077
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Geochronology and REE geochemistry of zircon and garnet in pelitic gneisses from the Higo metamorphic terrane, Kyushu, Japan: Constraints on the timing of high–temperature metamorphism (2019)
  • Author(s): BUI THI SINH Vuong、OSANAI Yasuhito、NAKANO Nobuhiko、ADACHI Tatsuro、KITANO Ippei
  • Journal Title: Journal of Mineralogical and Petrological Sciences Volume: 114 Issue: 2 Pages: 47-59
  • DOI: 10.2465/jmps.181115
  • NAID: 130007649680
  • ISSN: 1345-6296, 1349-3825
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Metamorphic P-T conditions and variation of REE between two garnet generations from granulites in the Sor-Rondane mountains, East Antarctica? (2019)
  • Author(s): Baba, S, Osanai, Y, Adachi, T, Nakano, N, Hokada, T, Toyoshima, T
  • Journal Title: 地球科学 Volume: 6 Pages: 163-178
  • DOI: 10.1007/s00710-019-00680-0
  • Peer Reviewed / Open Access
• [Journal Article] Magma process of Gamano granodiorite in Ryoke belt, Yanai region, Yamaguchi, Southwest Japan (2019)
  • Author(s): 山口直文
  • Journal Title: Jour. Geol. Soc. Japan Volume: 125 Issue: 2 Pages: 121-136
  • DOI: 10.5575/geosoc.2018.0046
  • NAID: 130007660915
  • ISSN: 0016-7630, 1349-9963
  • Peer Reviewed / Open Access
• [Journal Article] Magma processes and genesis of the Cretaceous Kawara granodiorite Ushikiri-yama body (Ushikiri-yama granodiorite), North Kyushu, SW Japan (2019)
  • Author(s): 江島圭祐，大和田正明，今岡照喜，亀井淳志
  • Journal Title: Jour. Geol. Soc. Japan Volume: 125 Issue: 3 Pages: 237-253
  • DOI: 10.5575/geosoc.2018.0055
  • NAID: 130007660924
  • ISSN: 0016-7630, 1349-9963
  • Peer Reviewed / Open Access
• [Journal Article] U-Pb zircon ages and Sr and Nd isotope compositions of the Soeda Granodiorite, northern Kyushu, Southwest Japan (2019)
  • Author(s): 柚原雅樹・亀井淳志・川野良信・岡野 修・早坂康・加々美寛雄
  • Journal Title: Jour. Geol. Soc. Japan Volume: 125 Issue: 6 Pages: 405-420
  • DOI: 10.5575/geosoc.2019.0013
  • NAID: 40021977137
  • ISSN: 0016-7630, 1349-9963
  • Peer Reviewed / Open Access
• [Journal Article] Geochemical characteristics of river mouth sediments around Lake Biwa, southwest Japan: Implications for provenance, weathering and sorting of sediments (2019)
  • Author(s): TAKASU Kana, ROSER Barry, KAMEI Atsushi
  • Journal Title: Earth Science (Chikyu Kagaku) Volume: 73 Pages: 75-92
  • NAID: 40021893312
  • Peer Reviewed
• [Journal Article] 北部九州白亜紀花崗岩類，真崎花崗岩の化学組成と活動時期 (2019)
  • Author(s): 柚原雅樹・水田史也・西 瑛莉子・清浦海里・亀井淳志・川野良信・岡野 修・早坂康隆
  • Journal Title: 地球科学 Volume: 73 Pages: 163-178
  • NAID: 40021974507
  • Peer Reviewed
• [Journal Article] Sr–Nd isotopic compositions of the Susuma–Nagaho Plutonic Complex in the San–yo Belt, Southwest Japan: Implications for the Cretaceous enriched mantle (2019)
  • Author(s): KODAMA Shogo、OWADA Masaaki、IMAOKA Teruyoshi、KAMEI Atsushi
  • Journal Title: Journal of Mineralogical and Petrological Sciences Volume: 114 Issue: 2 Pages: 99-104
  • DOI: 10.2465/jmps.181118b
  • NAID: 130007649678
  • ISSN: 1345-6296, 1349-3825
  • Peer Reviewed / Open Access
• [Journal Article] In-situ U-Pb isotope and REE analyses for zircons from ultrahigh temperature metamorphic rocks in the Kannak Complex, Kontum Massif, Vietnam (2019)
  • Author(s): Bui, V.T.S., Osanai, Y., Nakano, N., Adachi, T., Kitano, I.
  • Journal Title: 地球社会統合科学 Volume: 26, 2 Pages: 1-9
• [Journal Article] Gem-Quality Zircon Megacrysts from Placer Deposits in the Central Highlands, Vietnam?Potential Source and Links to Cenozoic Alkali Basalts (2019)
  • Author(s): Sinh Vuong Bui Thi、Osanai Yasuhito、Lenz Christoph、Nakano Nobuhiko、Adachi Tatsuro、Belousova Elena、Kitano Ippei
  • Journal Title: Minerals Volume: 9 Pages: 89-106
  • DOI: 10.3390/min9020089
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Synthesis and crystal-chemistry of mukhinite, V-analogue of clinozoisite on the join Ca2Al3Si3O12(OH)-Ca2Al2VSi3O12(OH) (2019)
  • Author(s): Nagashima, M., Nishio-Hamane, D., Nakano, N., and Kawasaki, T.
  • Journal Title: Physics and Chemistry of Minerals Volume: 46 Pages: 63-76
  • DOI: 10.1007/s00269-018-0988-4
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Chemical speciation and bioavailability concentration of arsenic and heavy metals in sediment and soil cores in estuarine ecosystem, Vietnam. (2018)
  • Author(s): Nguyen Van Thinh, Osanai, Y., Adachi, T., Phong K. Thai, Nakano, N., Ozaki, A., Kuwahara, Y., Kato, R., Makio, M., Kurosawa, K.
  • Journal Title: Microchemical Journal Volume: 139 Pages: 268-277
  • DOI: 10.1016/j.microc.2018.03.005
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Detrital zircon and igneous protolith ages of high-grade metamorphic rocks in the Highland and Wanni Complexes, Sri Lanka: their geochronological correlation with southern India and East Antarctica. (2018)
  • Author(s): Kitano, I., Osanai, Y., Nakano, N., Adachi, T., Fitzsimons, I.C.W.
  • Journal Title: Journal of Asian Earth Sciences Volume: 156 Pages: 122-144
  • DOI: 10.1016/j.jseaes.2018.01.017
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Oxidation States of Fe in Constituent Minerals of a Spinel Lherzolite Xenolith from the Tariat Depression, Mongolia: The Significance of Fe3+ in Olivine. (2018)
  • Author(s): Ejima, T., Osanai, Y., Akasaka, M., Adachi, T., Nakano, N., Kon, Y., Ohfuji, H., Jargalan, S.
  • Journal Title: Minerals Volume: 8 Pages: 1-17
  • DOI: 10.3390/min8050204
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] 北上山地から見いだされた「ラテライト質」変成岩の化学組成とジルコン U-Pb年代について (2019)
  • Author(s): 土谷信高・熊谷大和・足立達朗・中野伸彦・小山内康人
  • Organizer: 日本地球惑星科学連合2019年大会
• [Presentation] 東南極セール・ロンダーネ山地北部に産するFe-Alに富むグラニュライトの変成組織とザクロ石REEの相違 (2019)
  • Author(s): 馬場壮太郎・小山内康人・中野伸彦・外田智千・足立達朗・豊島剛志
  • Organizer: 日本鉱物科学会2019年年会
• [Presentation] 東南極セール・ロンダーネ山地の泥質片麻岩から見出されたコランダムと石英包有物の産状とその解釈 (2019)
  • Author(s): 外田智千・小山内康人・中野伸彦・足立達朗・豊島剛志・馬場壮太郞
  • Organizer: 日本鉱物科学会2019年年会
• [Presentation] 西南日本九州北部に分布する三郡変成帯結晶片岩の砕屑性ジルコン後背地の多様性 (2019)
  • Author(s): 北野一平・小山内康人・中野伸彦・足立達朗
  • Organizer: 日本鉱物科学会2019年年会
• [Presentation] Zircon-monazite-garnet behaviors during high-grade metamorphism in the Kontum Massif, Vietnam (2019)
  • Author(s): Bui, V.T.S., Osanai, Y., Nakano, N., Adachi, T., Kitano, I., Owada, M.
  • Organizer: 日本鉱物科学会2019年年会
• [Presentation] 八幡浜大島に分布する大島変成岩体のLA-ICP-MSジルコンU-Pb年代と地体構造上の意義 (2019)
  • Author(s): 小山内康人・北野一平・中野伸彦・足立達朗・Bui, V.T.S.・小松正幸
  • Organizer: 日本鉱物科学会2019年年会
• [Presentation] 青海地域蓮華変成岩類の記載岩石学的特徴とジルコンU-Pb年代 (2019)
  • Author(s): 北野一平・小山内康人・中野伸彦・足立達朗
  • Organizer: 日本鉱物科学会2019年年会
• [Presentation] モンゴル北西部・ハンホヒン山地に産する泥質片麻岩に含まれるザクロ石中のクリストバライト包有物 (2019)
  • Author(s): 足立達朗・小山内康人・中野伸彦・Kundyz, S., Jargalan, S., 大和田正明・Satish-Kumar, M.
  • Organizer: 日本鉱物科学会2019年年会
• [Presentation] Pressure-temperature-time conditions of metamorphism of pelitic gneisses in the Gobi-Altai Mountains from southwestern Mongolia (2019)
  • Author(s): Kundyz S., Osanai, Y., Nakano, N., Adachi, T., Jargalan, S., Owada, M., Satish-Kumar, M., Boldbaatar, Ch.
  • Organizer: 日本鉱物科学会2019年年会
• [Presentation] 山口県長門構造帯に産する変成岩・深成岩類のジルコンU-Pb年代の特徴 (2019)
  • Author(s): 北野一平・小山内康人・中野伸彦・足立達朗・加藤涼介・Bui, V.T.S.
  • Organizer: 日本鉱物科学会2019年年会
• [Presentation] ベトナム・コンツム地塊，カンナック岩体，ペルム紀－三畳紀，火成作用と変成作用の関係 (2019)
  • Author(s): 大和田正明・小山内康人・中野伸彦・北野一平・足立達朗
  • Organizer: 日本鉱物科学会2019年年会
• [Presentation] モンゴルアルタイ山脈の泥質変成岩に記録された古生代・沈み込みー付加ー大陸衝突に伴う造山帯運動 (2019)
  • Author(s): 中野伸彦・小山内康人・Jargalan S.・足立達朗・Kundyz, S.・大和田正明・Satish-Kumar, M.
  • Organizer: 日本鉱物科学会2019年年会
• [Presentation] 南極セール・ロンダーネ山地の角閃岩相変成作用の再検討 (2019)
  • 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: 日本地質学会第126回学術大会
• [Presentation] Zircon chronology for high temperature metamorphic rocks in the Wanni and Highland Complexes, Sri Lanka (2019)
  • Author(s): Kitano, I., Osanai, Y., Nakano, N., Adachi, T.
  • Organizer: International Association for Gondwana Research 2019 Convention and 16th International Conference on Gondwana to Asia
• [Presentation] LA-ICP-MS zircon U-Pb geochronology of granitic rocks in the Central Mongolia (2019)
  • Author(s): Dolzodmaa, B., Osanai, Y., Nakano, N., Adachi, T.
  • Organizer: International Association for Gondwana Research 2019 Convention and 16th International Conference on Gondwana to Asia
• [Presentation] Petrology of high-grade metamorphic rocks in West Timor, Indonesia (2019)
  • Author(s): Wahyuandari, F.A.C., Osanai, Y., Nakano, N., Adachi, T., Setiawan, N.I.
  • Organizer: International Association for Gondwana Research 2019 Convention and 16th International Conference on Gondwana to Asia
• [Presentation] Metamorphic history of the high-grade metamorphic rocks in the Ngoc Linh Complex, Kontum Massif, Vietnam (2019)
  • Author(s): Bui, V.T.S., Osanai, Y., Nakano, N., Adachi, T., Kitano, I., Owada, M.
  • Organizer: International Association for Gondwana Research 2019 Convention and 16th International Conference on Gondwana to Asia
• [Presentation] Newly determined U-Pb zircon ages from the Napier Complex, East Antarctica International Association for Gondwana Research 2019 Convention and 16th International Conference on Gondwana to Asia (2019)
  • Author(s): Osanai, Y., Kitano, I., Nakano, N., Adachi, T., Toyoshima, T., Hokada, T., Owada, M., Tsunogae, T., Bui, V.T.S.
  • Organizer: International Association for Gondwana Research 2019 Convention and 16th International Conference on Gondwana to Asia
• [Presentation] Origin and evolution of the Kontum Massif and neighboring high-grade metamorphic terranes in Vietnam; Constraints from P-T-t path and inherited zircon signatures (2019)
  • Author(s): Nakano, N., Osanai, T., Owada, M., Binh, P., Hokada, T., Kaiden, H.
  • Organizer: International Association for Gondwana Research 2019 Convention and 16th International Conference on Gondwana to Asia
• [Presentation] Ultrahigh-temperature metamorphic rocks from Highland Complex, Sri Lanka (2019)
  • Author(s): Osanai, Y., Nakano, N., Kitano, I., Adachi, T., Owada, M., Sajeev, K., Kehelpannala, W., Malaviachchi, S.
  • Organizer: MAESA Second International Conference on Applied Earth Sciences in Myanmar and Neighboring Regions
• [Presentation] Tectonic evolution of the Kontum Massif, central Vietnam (2019)
  • Author(s): Nakano, N., Osanai, Y., Owada, M., Binh, P.
  • Organizer: MAESA Second International Conference on Applied Earth Sciences in Myanmar and Neighboring Regions
• [Presentation] Permo-Triassic tectonic processes in Kannak Complex, Kon Tum Massif, Vietnam (2019)
  • Author(s): Owada, M., Osanai, Y., Nakano, N., Kitano, I., Adachi, T.
  • Organizer: MAESA Second International Conference on Applied Earth Sciences in Myanmar and Neighboring Regions
• [Presentation] 東南極セール・ロンダーネ山地に産する大陸衝突型の高Ｋアダカイト質花崗岩 (2019)
  • Author(s): 亀井淳志・大和田正明・堀江憲路・志村俊昭・柚原雅樹・束田和弘
  • Organizer: 日本鉱物科学会2019年年会
• [Presentation] Pan-African high-K adakitic intrusion in the Sor Rondane Mountains, East Antarctica (2019)
  • Author(s): Atsushi Kamei, Masaaki Owada, Kenji Horie, Toshiaki Shimura, Masaki Yuhara, Kazuhiro Tsukada
  • Organizer: International Association for Gondwana Research 2019 Convention and 16th International Conference on Gondwana to Asia
• [Presentation] High-K adakitic intrusion in the Sor Rondane Mountains, East Antarctica (2019)
  • Author(s): Atsushi Kamei, Masaaki Owada, Kenji Horie, Toshiaki Shimura, Masaki Yuhara, Kazuhiro Tsukada
  • Organizer: The 10th Symposiium on Polar Science
• [Presentation] U-Pb zircon geochronology on high-grade metamorphic rocks from the Higo metamorphic Belt in central Kyushu, Japan (2018)
  • Author(s): 22.Bui, B.T.S., Osanai, Y., Nakano, N., Adachi, T.
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Formation of Neoproterozoic juvenile crust in Eastern Dronning Maud Land, East Antarctica (2018)
  • Author(s): Owada, M., Kamei, A., Osanai, Y., Nakano, N.
  • Organizer: 日本地球惑星科学連合2018年大会
  • Int'l Joint Research
• [Presentation] Geochemistry and geochronology of granitic rocks from the Ereendavaa area in northeastern Mongolia. (2018)
  • Author(s): Munkhdelger, B., Osanai, Y., Nakano, N., Adachi, T., Tamir, B., Undraa, S., Jargalan, S., Dolzodmaa, B., Bolormaa, T.
  • Organizer: 日本鉱物科学会2018年年会
• [Presentation] REE mineralization in alkaline plutonic rocks from north-west Mongolia. (2018)
  • Author(s): Tamir, B., Osanai, Y., Nakano, N., Adachi, T., Jargalan, S., Dolzodmaa, B., Bolormaa, T.
  • Organizer: 日本鉱物科学会2018年年会
• [Presentation] モンゴルアルタイ山脈，昇温期及び降温期の紅柱石と珪線石を含む粗粒藍晶石泥質変成岩の形成過程 (2018)
  • Author(s): 中野伸彦・小山内康人・Jargalan, S.・足立達朗・Kundyz, S.・大和田正明・Satish-Kumar, M.
  • Organizer: 日本鉱物科学会2018年年会
• [Presentation] スリランカ・ハイランド岩体およびワンニ岩体に分布する変成火成岩中のインヘリテッドジルコンHf同位体組成． (2018)
  • Author(s): 北野一平・小山内康人・中野伸彦・足立達朗
  • Organizer: 日本鉱物科学会2018年年会
• [Presentation] Geochronology of assumed cratonal terranes in Mongolia. (2018)
  • Author(s): Undraa, S., Osanai, Y., Nakano, N., Adachi, T., Jargalan, S., Dolzodmaa, B., Bolormaa, T., Tamir, B., Munkhdelger, B.
  • Organizer: 日本鉱物科学会2018年年会
• [Presentation] Tectonic evolution of extreme metamorphic rocks in the Trans Vietnam Orogenic Belt, SE-Asia (2018)
  • Author(s): Osanai, Y., Nakano, N., Owada, M., Binh, P., Tran Van Tri, Charusiri, P., Tran Ngoc Nam
  • Organizer: The Fifteenth Regional Congress on Geology, Mineral and Energy Resources of Southeast Asia (GEOSEA XV)
  • Int'l Joint Research / Invited
• [Presentation] Zircon U-Pb ages of high-grade metamorphic rocks from the Kontum Massif, Vietnam (2018)
  • Author(s): Sinh, V.T., Osanai, Y., Nakano, N., Adachi, T.
  • Organizer: The Fifteenth Regional Congress on Geology, Mineral and Energy Resources of Southeast Asia (GEOSEA XV)
  • Int'l Joint Research
• [Presentation] A protracted Phanerozoic history preserved in the eclogite-facies bauxites from the Red River shear zone, Northern Vietnam (2018)
  • Author(s): Nakano, N., Osanai, Y., Nguyen Van Nam, Tran Van Tri
  • Organizer: The Fifteenth Regional Congress on Geology, Mineral and Energy Resources of Southeast Asia (GEOSEA XV)
  • Int'l Joint Research
• [Presentation] Geochronology and petrogenesis of plume-related magmatism in the collision zone, Kon Tum Massif, Central Vietnam (2018)
  • Author(s): Owada, M., Osanai, Y., Nakano, N., Binh, P., Tran Van Tri
  • Organizer: The Fifteenth Regional Congress on Geology, Mineral and Energy Resources of Southeast Asia (GEOSEA XV)
  • Int'l Joint Research