Japanese-Russian Workshop Symposium

Supported by: Japan Society for Promotion of Science, Russian Foundation for Basic Research, Tohoku University Global COE Program gGlobal Education and Research Center for Earth and Planetary Dynamicsh, and Centre for Northeast Asian Studies, Tohoku University


gNorthern Pacific-Rim Ophiolites and their Ocean-Floor Analoguesh


Place: Center for Northeast Asian Studies, Tohoku University

Kawauchi 41, Aoba-ku, Sendai 980-8576 Japan

Meeting Room #436 (4th Floor)


Time: Monday-Thursday, February 7-10, 2011


The Symposium was successfully completed (Photos)


Organizers: Akira Ishiwatari, Naoto Hirano, Yasutaka Hayasaka, Sumiaki Machi, Sergey D. Sokolov and Galina V. Ledneva


[Akira ISHIWATARI] [Top] [Ishiwatari Laboratory] [CNEAS] [Dept. Earth Sci.] [Tohoku Univ.]





Monday, 7 February 2011


10:00 (start from Hotel Bel Air Sendai): Campus Tour. Visit the Tohoku University Museum and the Aoba-jo Castle of the Samurai Period. Lunch (University Restaurant)


14:00  Opening Remarks

  SATO, Motoyuki (Director, Center for Northeast Asian Studies, Tohoku University)


14:10  Introduction

  ISHIWATARI, Akira (Host Convener, Prof., CNEAS, Tohoku Univ.)

14:20  SOKOLOV, Sergey D. (Geol. Inst., Rus. Acad. Sci., Moscow), GANELIN,

Aleksandr V.

  Ophiolites of the South Anyui suture: tectonic position, age, and geodynamic setting.


14:50  LEDNEVA, Galina V. (Geol. Inst., Rus. Acad. Sci., Moscow), BAZYLEV, Boris A., ISHIWATARI, Akira, SOKOLOV, Sergey D., PEASE, Victoria L., MACHI, Sumiaki

  Hypabyssal mafic intrusions of Eastern Chukotka as indicators of Permo-Triassic -

  Late Triassic extension of the Arctic Alaska - Chukotka microplate

15:20  BAZYLEV, Boris A. (Vernadsky Inst. of Geochem. & Anal. Chem., Rus. Acad. Sci., Moscow), LEDNEVA, Galina V., KONONKOVA, Natalina N.

  Subduction-reworked subcontinental lithospheric mantle: An example from the 

  Eldenyr massif (Central Chukotka)


Coffee break


16:00  BAZYLEV, Boris A. (Vernadsky Inst. of Geochem. & Anal. Chem., Rus. Acad. Sci., Moscow), LEDNEVA, Galina V., ISHIWATARI, Akira, KONONKOVA, Natalina, N.

  Lower crustal Pekulfney complex (Central Chukotka): composition and geological

  relationships of high-P cumulates and their country rocks.


16:30  MACHI, Sumiaki (Kanazawa Univ.), ISHIWATARI, Akira, MORISHITA, Tomoaki, HAYASAKA, Yasutaka, LEDNEVA, Galina, V., SOKOLOV, Sergey, D., PALANDZHYAN, Suren A., BAZYLEV, Boris, A., TAMURA, Akihiro, ARAI, Shoji

  Major and Trace elements mineral composition in peridotites from the Ustf-Belaya

  ophiolite, Far East Russia


17:00  GANELIN, Aleksandr V. (Geol. Inst., Rus. Acad. Sci., Moscow)

  Two types of the dike suites of the Aluchin ophiolite complex (western Chukotka):

  Geochemistry and geodynamical position


17:30  MOISEEV, ArtemV. (Geol. Inst., Rus. Acad. Sci., Moscow), SOKOLOV, SergeyD.,

  HAYASAKA, Yasutaka

  Structure and composition of the Paleozoic terrigenous complex overlapping the

  Ust-Belaya ophiolite - tectonic and geodynamic conclusions


18:00  Close


18:10-20:00 Welcome Banquet in the Center for Northeast Asian Studies


Tuesday, 8 February 2011


9:00  ISHIWATARI, Akira (Tohoku Univ.)

  Toward the IODP Hahajima Seamount drilling in the Bonin fore-arc: Magmatism,

  metamorphism and tectonism as viewed from Japanese and Russian ophiolites

9:30  OKAMURA, Satoshi (Hokkaido Univ. of Education), YATSUKA, Sho, SAKAMOTO, Izumi, AZUMA, Toyoto

  Diverse geochemical signatures in MORB-like basalts dredged from the trench slope

  of the Ogasawara ridge and the Hahajima Seamount --- Implications for the origin of

  the tectonic event in the Izu-Bonin fore arc---


10:00  NIIDA, Kiyoaki (Hokkaido Univ.)

  Origin of serpetinized peridotites from the Ohmachi Seamount, Izu-Bonin arc.


Coffee break


10:40  CHIBA, Megumi (Hokkaido Univ.) and NIIDA, Kiyoaki 

  Primary melt impregnation observed in plagioclase-harzburgites from the Mariana



11:10  HAYASAKA, Yasutaka (Hiroshima Univ.), SAKASHIMA, Toshihiko, ARAI, Takashi, KIMURA, Gaku

  Schmidt Peninsular Ophiolite, Sakahlin, Russia: General description and zircon U-Pb

  SHRIMP age.


11:40  TAKASHIMA Reishi (Tohoku Univ.)

  Upper Jurassic Ophiolite and overlying Lower Cretaceous volcanic sediments exposed

  in Hokkaido, Japan.




13:30  DILEK, Yildirim (Miami Univ., Ohio)

  Geochemical and tectonic fingerprinting of ophiolites


14:00  HARRIS, Ron (Brigham Young Univ., Utah)

  Tectonic evolution of the Brooks Range Ophiolite, Alaska


14:30  HARRIS, Ron (Brigham Young Univ., Utah)

  Geodynamic patterns of Tertiary ophiolites and marginal basins in the

  Asian-Australian-Pacific convergent plate triple junction of the SW Pacific region:

  Modern analog for genesis and emplacement of Mesozoic ophiolites of the northern

  Pacific region.


15:00  SUDA, Yoshimitsu (Osaka City Univ.), KIMURA, Kosuke, HAYASAKA, Yasutaka

  Evolution of Paleozoic oceanic island arc-back arc basin system constrained by 

  geochemistry and geochronology of Yakuno ophiolite, southwest Japan.


Coffee break


15:40  HISADA, Ken-ichiro (Tsukuba Univ.)

  Detrital chromian spinel chemistry of Paleozoic and Mesozoic clastics in the Japanese



16:10  KIMURA, Kosuke (Hiroshima Univ.), HAYASAKA, Yasutaka, SUDA, Yoshimitsu

  Zircon U-Pb SHRIMP ages of Paleozoic ophiolitic rocks in the Inner Zone of SW Japan


16:40  HIRANO, Naoto (Tohoku Univ.)

  MOR to ARC evolution and petit-spot volcanoes of the Mineoka ophiolite as revealed

  by new geochemical and age constraints


17:10  YAMAMOTO, Yuzuru, SAITO, Saneatsu, KANAMATSU, Toshiya

  Young subduction-accretion system exposed in the south of the Mineoka ophiolite,

  Boso Peninsula, central Japan: introduction of field trip.


17:40  Close


18:30-20:30 Optional Dinner in Sendai Downtown


Wendsday , 9 February 2011 and Thursday, 10 February 2011

Field trip to the Boso Peninsula (Mineoka ophiolite and Tertiary accretionary complex)

Leaders: HIRANO, Naoto, YAMAMOTO, Yuzuru and ISHIWATARI Akira

9 Feb. at 07:30: Start from the hotel by bus, which will carry us throughout the trip. Accommodate in Tateyama, Chiba Prefecture.

10 Feb.: Full-day field trip. In the evening: Arrive at the hotel in Tokyo.

11 Feb. The bus carry us to the Narita Airport first, and then it will go back to Sendai.