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Geochronological and petrological studies of the northwestern Indian Himalayas: Understanding the early processes of continental collision zone

Research Project

Project/Area Number 18K03788
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 17040:Solid earth sciences-related
Research InstitutionOkayama University of Science

Principal Investigator

Imayama Takeshi  岡山理科大学, フロンティア理工学研究所, 准教授 (90551961)

Project Period (FY) 2018-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords大陸衝突帯初期プロセス / ヒマラヤ造山帯 / 北西インド / 変成岩上昇過程 / 北西インドヒマラヤ / 大陸衝突帯初期 / 地質年代学 / 大陸衝突帯 / 超高圧変成岩 / 部分溶融 / 圧力-温度―時間経路 / 沈み込み帯 / 超高圧-中圧型変成岩類 / 変成作用 / 変成圧力-温度―時間経路 / 岩石学
Outline of Final Research Achievements

We clarified the timing of subduction and onset of exhumation for the High Himalayan Crystalline Sequences in the Uttarakhand region of northwestern India. In Nepal, Oligocene thrusts and partial melting via biotite dehydration reaction within the High Himalayan Crystalline Sequences play a major role in the exhumation of metamorphic rocks, whereas these Oligocene thrusts and high-temperature partial melting were not recognized in northwestern India. Instead, the early Miocene normal faulting and fluid-saturated partial melting occurred within the High Himalayan Crystalline Sequences in northwestern India, distinguished from the exhumation mechanism of metamorphic rocks in Nepal. In addition, a geological survey and petrological study of ultrahigh-pressure metamorphic rocks in the northwestern India, Ladakh region revealed ultrahigh-pressure eclogites were accompanied with leucocratic melt, showing direct evidence that the eclogite was partially melted.

Academic Significance and Societal Importance of the Research Achievements

本研究によって、中央~西ヒマラヤ地域(ネパール、北東インド、ブータン)と東ヒマラヤ地域(北西インド)の地域的な地質や変成岩上昇テクトニクスの違いが明確になった。ヒマラヤ造山帯は、北から南へ向かって大きく地質構造が異なるため、南北方向の変成作用の違い(逆転温度構造)や部分溶融の影響について多くの研究がなされてきた。一方で、東西方向の変成作用や部分溶融の相違についての研究例は多くなく、本研究における学術的意義は高い。部分溶融やそれに伴う花崗岩形成に伴ってレアメタルやペグマタイト鉱床が生成される場合があり、その成因論の解明は社会的にも意義がある。

Report

(6 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (54 results)

All 2023 2022 2021 2020 2019 2018 Other

All Int'l Joint Research (9 results) Journal Article (14 results) (of which Int'l Joint Research: 11 results,  Peer Reviewed: 12 results) Presentation (30 results) (of which Int'l Joint Research: 16 results,  Invited: 6 results) Remarks (1 results)

  • [Int'l Joint Research] インド工科大学ボンベイ校/インド工科大学カーンプル校/インド工科大学カラグプル校(インド)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] 全北大学校/韓国基礎科学研究所(韓国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] 名古屋大学/新潟大学/秋田大学(日本)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] インド工科大学ボンベイ校/インド工科大学カラグプル校(インド)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] 韓国基礎科学研究所/全北大学(韓国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] 韓国基礎科学研究所(韓国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] インド工科大学(インド)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] 韓国基礎科学研究所(韓国)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] インド工科大学ボンベイ校(インド)

    • Related Report
      2018 Research-status Report
  • [Journal Article] Intra-channel detachment in a collisional orogen: The Jhala Normal Fault in the Bhagirathi river section, Garhwal Higher Himalaya, India2023

    • Author(s)
      Bose Narayan、Imayama Takeshi、Kawabata Ryoichi、Gupta Saibal、Yi Keewook
    • Journal Title

      Journal of Earth System Science

      Volume: 132 Issue: 1 Pages: 6-6

    • DOI

      10.1007/s12040-022-02019-4

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Chemical mass transport during deformation and metamorphism: Insights from the Main Central Thrust and its footwall of Western Arunachal Himalaya, NE India2022

    • Author(s)
      Kalita Pranjit、Phukon Purbajyoti、Goswami Tapos K.、Imayama Takeshi、Srivastava Hari B.
    • Journal Title

      Lithos

      Volume: 416-417 Pages: 106641-106641

    • DOI

      10.1016/j.lithos.2022.106641

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Eocene to Miocene metamorphic evolution and tectonic implication of the Ilam Nappe in Nepal Himalaya: Constraints from P?T conditions and monazite petrochronology2022

    • Author(s)
      Imayama Takeshi、Hoshino Ryuhei、Yi Keewook、Kawabata Ryoichi
    • Journal Title

      Journal of Asian Earth Sciences

      Volume: 234 Pages: 105276-105276

    • DOI

      10.1016/j.jseaes.2022.105276

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Neoproterozoic and middle Paleozoic geological events in the eastern Wolhyeonri complex of the southwestern Gyeonggi Massif, South Korea, and their tectonic correlations in northeastern Asia.2021

    • Author(s)
      Imayama, T., Oh*, C. W., Jeon, J., and Yi, K.
    • Journal Title

      Lithos

      Volume: 382-383 Pages: 105923-105923

    • DOI

      10.1016/j.lithos.2020.105923

    • Related Report
      2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Thematic issue: Evolution of Nepal Himalaya2021

    • Author(s)
      Sakai Harutaka、Iwano Hideki、Imayama Takeshi
    • Journal Title

      Island Arc

      Volume: 30 Issue: 1

    • DOI

      10.1111/iar.12413

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Multi‐stage metamorphic history of the Oki gneisses in Japan: Implications for Paleoproterozoic metamorphism and tectonic correlations in northeastern Asia2021

    • Author(s)
      Kawabata Ryoichi、Imayama Takeshi、Kato Takenori、Oh Chang‐Whan、Horie Kenji、Takehara Mami
    • Journal Title

      Journal of Metamorphic Geology

      Volume: 40 Issue: 2 Pages: 257-286

    • DOI

      10.1111/jmg.12627

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Tectonic discontinuity, partial melting and exhumation in the Garhwal Himalaya (Northwest India): Constrains from spatial and temporal pressure-temperature conditions along the Bhagirathi valley2021

    • Author(s)
      Kawabata Ryoichi、Imayama Takeshi、Bose Narayan、Yi Keewook、Kouketsu Yui
    • Journal Title

      Lithos

      Volume: 404-405 Pages: 106488-106488

    • DOI

      10.1016/j.lithos.2021.106488

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Variability of protoliths and pressure-temperature conditions of amphibolites from the Ohmachi Seamount (Izu-Bonin-Mariana arc): Evidence of a fossil subduction channel in modern intra-oceanic arcs.2020

    • Author(s)
      Imayama*, T., Ueda, H., Usuki, T., Minami, M., Asahara, Y., and Nagahashi, T.
    • Journal Title

      Mineralogy and Petrology

      Volume: 114 Issue: 4 Pages: 305-318

    • DOI

      10.1007/s00710-020-00705-z

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] The absence of high-pressure metamorphism in the inverted Barrovian metamorphic sequences of the Arun area, eastern Nepal and its tectonic implication2020

    • Author(s)
      Imayama*, T., Uehara, S., Sakai, H., Yagi, K., Ikawa, C., and Yi, K.
    • Journal Title

      International Journal of Earth Sciences

      Volume: 109 Issue: 2 Pages: 465-488

    • DOI

      10.1007/s00531-019-01816-5

    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Late Permian to Early Triassic back-arc type volcanism in the southern Mongolia volcano-plutonic belt of the Central Asian Orogenic Belt: Implication for timing of the final closure of the Palaeo-Asian Ocean2019

    • Author(s)
      Imayama, T., Koh, Y., Aoki, K., Saneyoshi, M., Yagi, K., Aoki, S., Terada, T., Sawada, Y., Ikawa, C., Ishigaki, S., Toyoda, S., Tsogtbaatar, Kh, and Mainbayar, B.
    • Journal Title

      Journal of Geodynamics

      Volume: 131 Pages: 101650-101650

    • DOI

      10.1016/j.jog.2019.101650

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Research report of the Tso Morari ultra-high pressure metamorphic complex in Ladakh, NW India2019

    • Author(s)
      Imayama, T., and Dutta, D.
    • Journal Title

      Bull. Inst. Front. Sci. Tech, Okayama Univ. of Sci.

      Volume: 1 Pages: 49-52

    • NAID

      40022237185

    • Related Report
      2019 Research-status Report
  • [Journal Article] 1.74 Ga crustal melting after rifting at the northern Indian margin: investigation of mylonitic orthogneisses in the Kathmandu area, central Nepal.2018

    • Author(s)
      Imayama Takeshi、Arita Kazunori、Fukuyama Mayuko、Yi Keewook、Kawabata Ryoichi
    • Journal Title

      International Geology Review

      Volume: 61 Issue: 10 Pages: 1207-1221

    • DOI

      10.1080/00206814.2018.1504329

    • Related Report
      2019 Research-status Report 2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Early Oligocene partial melting via biotite dehydration melting and prolonged low-pressure-low-temperature metamorphism of the upper High Himalaya Crystalline Sequences in far-eastern Nepal. In: Sharma, R., Villa, I. M. and Kumar, S. (eds.), Crustal Architecture and Evolution of the Himalaya-Karakoram-Tibet Orogen2018

    • Author(s)
      Imayama, T., Takeshita, T., Yi, K. and Fukuyama, M.
    • Journal Title

      Geological Society, London, Special Publications

      Volume: 481 Issue: 1 Pages: 1-27

    • DOI

      10.1144/sp481.2

    • Related Report
      2019 Research-status Report 2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Inverted metamorphism in the Ilam Nappe, far-eastern Nepal2018

    • Author(s)
      Imayama, T. and R. Hoshino
    • Journal Title

      Bull. Res. Inst. Nat. Sci., Okayama Univ. of Sci.

      Volume: 44 Pages: 11-15

    • NAID

      40022022893

    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Early Paleozoic rift-related magmatic origin of the Tso Morari Complex (NW Indian Himalayas) and the protolithic diversity of the Himalayan high and ultrahigh-pressure rocks.2022

    • Author(s)
      Dripta, D., Imayama, T., and Yi, K.
    • Organizer
      2022 AGU meeting
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Early Paleozoic rift-related magmatism recorded in the ultrahigh-pressure Tso Morari Complex (NW Indian Himalaya)2022

    • Author(s)
      Imayama, T., Dripta, D., and Yi, K.
    • Organizer
      2022 Korean Geological Society conference
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Eocene to Miocene metamorphic evolution and tectonic implication of the Ilam Nappe in Nepal Himalaya: Constraints from P-T conditions and monazite petrochronology.2022

    • Author(s)
      Imayama, T., Hoshino, R., Yi, K., and Kawabata, R.
    • Organizer
      2022 Italian Geological Society conference
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Eocene to Miocene metamorphic evolution and tectonic implication of the Ilam Nappe in Nepal Himalaya: Constraints from P-T conditions and monazite petrochronology2022

    • Author(s)
      Imayama, T., Hoshino, R., Yi, K., and Kawabata, R.
    • Organizer
      2022 Goldschmidt Conference
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Eocene to Miocene metamorphic evolution and tectonic implication of the Ilam Nappe in Nepal Himalaya: Constraints from P-T conditions and monazite petrochronology2022

    • Author(s)
      Imayama, T., Hoshino, R., Yi, K., and Kawabata, R.
    • Organizer
      2022地球惑星連合大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Channel-flow induced 'normal faulting' in the Himalaya: a case study from the Jhala Normal Fault, Garhwal Higher Himalaya, NW India2022

    • Author(s)
      Bose, N., Imayama, T., Kawabata, R., Gupta, S., and Yi, K.
    • Organizer
      2022 EGU General Assembly
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Neoproterozoic and middle Paleozoic geological events in the eastern Wolhyeonri complex of the southwestern Gyeonggi Massif, South Korea, and their tectonic correlations in northeastern Asia.2021

    • Author(s)
      Imayama, T., Oh, C.W., Jeon, J., and Yi, K.
    • Organizer
      2021変成岩などシンポジウム
    • Related Report
      2021 Research-status Report
  • [Presentation] Multiple igneous activities recorded in the Nidar ophiolite complex, eastern Ladakh2021

    • Author(s)
      佐藤成修, 今山武志, Dutta Dripta
    • Organizer
      2021 Japan Geoscience Union Meeting
    • Related Report
      2021 Research-status Report
  • [Presentation] 南モンゴルペルム紀-三畳紀火山岩類と中央ネパール古原生代花崗岩類の起源とテクトニクス2021

    • Author(s)
      今山 武志
    • Organizer
      2021日本地質学会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 福島県南部,二岐山火山の噴火史とマグマ供給系2021

    • Author(s)
      渡部将太,長谷川健,小畑直也,豊田新,今山武志
    • Organizer
      2021日本地質学会
    • Related Report
      2021 Research-status Report
  • [Presentation] Multi-stage metamorphic history of the Oki gneisses in Japan: Implications for Paleoproterozoic metamorphism and tectonic correlations in northeastern Asia2021

    • Author(s)
      Imayama, T., Kawabata, R., Kato, T., Oh, C. W., Horie, K., and Takehara, M.
    • Organizer
      2021日本鉱物学会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 北西インドNidarオフィオライト層火成岩類の岩石学・地球化学的研究2021

    • Author(s)
      佐藤成修, 今山武志, Dutta Dripta, 金田泰明, 渡部将太, 長谷川健, 南雅代, 若杉勇輝, 若木重行
    • Organizer
      2021日本鉱物学会
    • Related Report
      2021 Research-status Report
  • [Presentation] Tectonic discontinuity, partial melting and exhumation in the Garhwal Himalaya (Northwest India): Constrains from spatial and temporal pressure-temperature conditions along the Bhagirathi valley2021

    • Author(s)
      Imayama, T., Kawabata, R., Bose, N., Yi, K., and Kouketsu, Y.
    • Organizer
      2021 AGU meeting
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 隠岐片麻岩の複数変成作用と起源2020

    • Author(s)
      今山 武志
    • Organizer
      日本地球化学会第 67回年会
    • Related Report
      2020 Research-status Report
  • [Presentation] Late Permian to Early Triassic back-arc type volcanism in the southern Mongolia volcano-plutonic belt of the Central Asian Orogenic Belt: Implication for timing of the final closure of the Palaeo-Asian Ocean.2020

    • Author(s)
      Imayama, T., Koh, Y., Aoki, K., Saneyoshi, M., Yagi, K., Aoki, S., Terada, T., Sawada, Y., Ikawa, C., Ishigaki, S., Toyoda, S., Tsogtbaatar, Kh, and Mainbayar, B.
    • Organizer
      Frontier Symposium on Geohistory of East Asia and Okayama
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Variability of Protoliths and P-T Conditions of Amphibolites from the Ohmachi Seamount (Izu-Bonin-Mariana Arc)2020

    • Author(s)
      Imayama, T., Ueda, H., Usuki, T., Minami, M., Asahara, Y., and Nagahashi, T.
    • Organizer
      2020 Goldschmidt Conference
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 北西インド Uttarakhand 地域の流体飽和による漸新世 Barrovian 型変成作用2019

    • Author(s)
      川端凌市・今山武志・Narayan Bose・Yi Keewook・纐纈佑衣
    • Organizer
      OUSフォーラム2019
    • Related Report
      2019 Research-status Report
  • [Presentation] Polymetamorphic evolution of the Oki gneisses in Japan: Implications for the Paleoproterozoic metamorphism and its tectonic correlation in northeastern Asia2019

    • Author(s)
      Imayama, T., Kawabata, R., Kato, T., Horie, K., and Takehara, M.
    • Organizer
      2019 Fall Joint Conference of the Korean Geological Sciences
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] The inverted Barrovian metamorphic sequences and fluid-present melting in the Arun area, eastern Nepal2019

    • Author(s)
      Imayama, T., Uehara, S., Sakai, H., Yagi, K., Ikawa, C., and Yi, K.
    • Organizer
      2019 Goldschmidt Conference
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] CHIME年代測定による隠岐・島後片麻岩類の変成年代の推定2019

    • Author(s)
      今山武志・川端凌市・加藤 丈典
    • Organizer
      名古屋大学 宇宙地球環境研究所 共同利用・共同研究コミュニティミーティング
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Preservation of the early Oligocene Barrovian-type metamorphism caused the fluid-present melting along Bhagirathi River in the Uttaraganti area, NW India2019

    • Author(s)
      Kawabata, R., Imayama, T., Bose, N., Yi, K., and Kouketsu, Y.
    • Organizer
      34th Himalaya-Karakorum-Tibet workshop
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Classification of volcanic rocks in the Muslim Bagh area: Constraints from petrological characteristics and K-Ar ages2019

    • Author(s)
      Arao, M., Imayama, T., Yagi, K., Ikawa, T., Sawada, M., Siddiqui, R., and Khan, S.
    • Organizer
      JSPS Japanese-German graduate externship International Workshop on “Volatile Cycles”
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Petrological and geochronological studies of the volcanic rocks in the Muslim Bagh area, Pakistan.2019

    • Author(s)
      荒尾 眞成・今山武志・八木 公史・猪川 千晶・澤田 順弘・Rehanul Siddiqui・Said Khan
    • Organizer
      2019地球惑星科学連合大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Late Permian to Early Triassic back-arc type volcanism in the southern Mongolia volcano-plutonic belt of the Central Asian Orogenic Belt: Implication for timing of the final closure of the Palaeo-Asian Ocean.2019

    • Author(s)
      Imayama, T., Koh, Y., Aoki, K., Saneyoshi, M., Yagi, K., Aoki, S., Terada, T., Sawada, Y., Ikawa, C., Ishigaki, S., Toyoda, S., Tsogtbaatar, Kh, and Mainbayar, B.
    • Organizer
      2019地球惑星科学連合大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Early Oligocene partial melting via biotite dehydration melting and prolonged low- P/T metamorphism of the upper High Himalaya Crystalline Sequence in the far east of Nepal2019

    • Author(s)
      Imayama, T., Takeshita, T., Yi, K. and Fukuyama, M.
    • Organizer
      3rd International RINS Symposium -Metamorphism, deformation, and geochronology in orogeny-
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] The early Oligocene Barrovian-type metamorphism related to fluid-saturated melting along Bhagirathi River in the Uttarakhand area, NW India2019

    • Author(s)
      Kawabata, R., Imayama, T., Bose, N., and Yi, K.
    • Organizer
      3rd International RINS Symposium -Metamorphism, deformation, and geochronology in orogeny-
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 北西インドヒマラヤBhagirathi川沿いの変成温度圧力条件と変成年代について2018

    • Author(s)
      川端凌市・今山武志・Narayan Bose・Yi Keewook
    • Organizer
      「衝突山脈ヒマラヤの形成モデルの構築」研究集会, 京都大学
    • Related Report
      2018 Research-status Report
  • [Presentation] 1.74 Ga crustal melting after rifting at the northern Indian margin: Investigation of mylonitic orthogneisses in the Kathmandu area, central Nepal2018

    • Author(s)
      Imayama, T., Arita, K. Fukuyama, M. Yi, K., and Kawabata, R.
    • Organizer
      33rd Himalaya-Karakorum-Tibet workshop
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 1.74 Ga crustal melting after rifting at the northern Indian margin: Investigation of mylonitic orthogneisses in the Kathmandu area, central Nepal2018

    • Author(s)
      Imayama, T., Arita, K. Fukuyama, M. Yi, K., and Kawabata, R.
    • Organizer
      15th Asia Oceania Geosciences Society meeting
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 1.74 Ga felsic magmatism formed via crustal melting: Investigation of mylonitic orthogneisses in the frontal zone of the Kathmandu Complex, central Nepal2018

    • Author(s)
      Imayama, T., Arita, K. Fukuyama, M. Yi, K., and Kawabata, R.
    • Organizer
      地球惑星科学連合大会
    • Related Report
      2018 Research-status Report
  • [Remarks] 今山研究室 生命・地球・環境部門

    • URL

      http://t-imayama.com/

    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2024-01-30  

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