Kyoko OKINO Professor
Speciality: Submarine Geophysics & Tectonics

Fujii M., Okino K., Sato H., Nakamura K., Sato T., and Yamazaki T., Variation in magnetic properties of serpentinized peridotite exposed on the Yokoniwa Rise. Central Indian Ridge: Insights into the role of magnetite in serpentinization, Geochemistry. Geophysics. Geosystems, 17, 10.1016/j.epsl.2016.02.018, 2016.

Honsho C., Yamazaki T., Ura T., Okino K., Morozumi H. and Ueda S., Magnetic anomalies associated with abundant production of pyrrhotite in a sulfide deposit in the Okinawa Trough. Japan, 17, 10.1002/2016GC006480, 2016.

Nakamura K., Machida S., Okino K., Masaki Y., Iijima K., Suzuki K. and Kato Y., Acoustic characterization of pelagic sediments using sub-bottom profiler data: Implications for the distribution of REY-rich mud in the Minamitorishima EEZ. western Pacific, Geochemical Journal, 50, 10.2343/geochemj.2.0433, 2016.

Kawaguchi, S., J. Miyazaki, T. Noguchi, K. Okamura, T. Shibuya, T. Watsuji, M., Nishizawa, H. Watanabe, K. Okino, N. Takahata, Y. Sano, K. Nakamura, A. Shuto, M. Abe, Y. Takaki, T. Nunoura, M. Koonjul, M. Singh, G. Beedessee, M. Khishma, V. Bhoyroo, D. Bissessur, L.S. Kumar, D. Marie, K. Tamaki, and K. Takai, Fluid chemistry in the Solitaire and Dodo hydrothermal fields of the Central Indian Ridge, Geofluids, DOI: 10.1111/gfl.12201, 2016.

Fujii M., Okino K., Sato T, Sato H and Nakamra K, Orogin of magnetic highs at ultramafic hosted hydrothermal systems: Insights from the Yokoniwa site of Central Indian Ridge, Earth and Planetary Science Letters, 441, 26-37, doi:10.1016/j/epsl.2016.02.018, 2016.

Okino Kyoko、Magnetic Anomalies in the Philippine Sea: Implications for Regional Tectonics、Journal of Geography(Chigaku Zasshi)、124, 729–747, doi:10.5026/jgeography.124.0000, 2015. (in Japanese)

Okamura K., Sugiyama T., Noguchi T., Fukuba T. and Okino K., Development of a deep-sea hydrogen sulfide ion sensor and its application for submarine hydrothermal plume exploration, Geochemical Journal, 49, 603-611, doi:10.2343/geochemj.2.0391, 2015.

Nakamura K., Kawagucci S., Kitada K., Kumagai H., Takai K. and Okino K., Water column imaging with multibeam echo-sounding in the mid-Okinawa Trough: implications for distribution of dep-sea hydrothermal vent sites and the cause of acoustic water column anomaly, Geochemical Journal, 49, 579-596, doi:10.2343/geochemj.2.0387, 2015.

Fujii, M., K. Okino, C. Honsho, J. Dyment, F. Szitkar, N. Mochizuki, and M. Asada, High-Resolution Magnetic Signature of Active Hydrothermal Systems in the Back-Arc Spreading Region of the Southern Mariana Trough, J. Geophys. Res., 120, 2821-2837, doi:10.1002/2014JB011714, 2015.

Okino, K., K. Nakamura, and H. Sato, Tectonic background of four hydrothermal fields along the Central Indian Ridge, in J. Ishibashi et al. (eds.)., Subseafloor Biosphere Linked to Global Hydrothermal Systems; TAIGA Concept, Springer Japan, Tokyo, 2015.

Morishita, T., K. Nakamura, T. Shibuya, H. Kumagai, T. Sato, K. Okino, H. Sato, R. Nauchi, K. Hara, and R. Takamaru, Petrology of peridotites and related gabbroic rocks around the Kairei hydrothermal field in the Central Indian Ridge, in J. Ishibashi et al. (eds.)., Subseafloor Biosphere Linked to Global Hydrothermal Systems; TAIGA Concept, Springer Japan, Tokyo, 2015.

Seama, N., H. Sato, Y. Nogi and K. Okino, The mantle dynamics, the crustal formation, and the hydrothermal activity of the Southern Mariana Trough back-arc Basin, in J. Ishibashi et al. (eds.)., Subseafloor Biosphere Linked to Global Hydrothermal Systems; TAIGA Concept, Springer Japan, Tokyo, 2015.

Seama N. and K. Okino, Asymmetric seafloor spreading of the Southern Mariana Trough back-arc basin, in J. Ishibashi et al. (eds.)., Subseafloor Biosphere Linked to Global Hydrothermal Systems; TAIGA Concept, Springer Japan, Tokyo, 2015.

Sato T., K. Okino, H. Sato, M. Mizuno, T. Hanyu and N. Seama, Magmatic activities on the Southwest Indian Ridge between 35°E and 40°E, the closest segment to the Marion hotspot, Geochem. Geophys. Ceosyst., 14, doi:10.1002/2013GC004814, 2013.

Nakamura K., T. Toki, N. Mochizuki, M. Asada, J. Ishibashi, Y. Nogi, S. Yoshikawa, J. Miyazaki and K. Okino, Discovery of a new hydrothermal vent based on an underwater, high-resolution geopjuysica survey, Deep-Sea Research I, 74, 1-10, dpi:10,1016/j.dsr.2012.12.003, 2013. [Abstract]

Yoshikawa S., K. Okino and M. Asada, Geomorphological variations at hydrothermal sites in the southern Mariana Trough: relationship between hydrothermal activity and topographic characteristics, Marine Geology, 303-306, 172-182, doi:10.1016/j.dsr.2012.12.003, 2012. [Abstract]

Ohara Y., Okino K., Snow J.E., Tectonics of unusual crustal accretion in the Parece Vela basin, in Accretionary Prisms and Convergent Margin Tectonics in the Northwest Pacific Basin, Modern Appproaches in Solid Earth Sciences 8, pp. 149-168, Springer Science+Business Media, 2011. [Abstract]

Watanabe, M., K. Okino and T. Kodera, Rifting to spreading in the southern Lau Basin: Variations within the transition zone, Tectonophysics 494, 226-234, 2010. [Abstract]

Kandilarov, A., H. Landa, R. Mjelde, R.B. Pedersen, K. Okino and Y. Murai, Crustal structure of the ultra-slow spreading Knipovich Ridge, North Atlantic, along a presumed ridge segment center, Marine Geophys. Res., 31, 173-195, 2010. [Abstract]

Curewitz D., K.Okino, M. Asada, B.Baranov, E. GUsev, and K. Tamaki, Structural analysis of fault populations along the oblique ultra-slow spreading Knipovich Ridge, North Atlantic Ocean, 74 degrees 30 ' N-77 degrees 50 ' N, J. Structural Geology, 32, 727-740, 2010. [Abstract]

Morishita, T., K. Hara, K. Nakamura, T. Sawaguchi, A. Tamura, S. Arai, K. okino, K. Takai, and H. Kumagai, Igneous, alteration, and exhumation processes recorded in abyssal peridotites and related fault rocks from an oceanic core complex along the Central Indian Ridge, Journal of Petrology,50,1299-1325,2009. [Abstract]

Nakamura K., T. Morishita, W. Bach, F. Klein, K. Hara, K. Okino, and K. Takai, Serpentinized troctolistes exposed near the Kairei Hydrothermal Field, Cnetral Indian Ridge: Insights into the origin of the Kairei hydrothermal fluid supporting a unique microbiological ecosystem, Earth and Planetary Science Letters, 280,128-136, 2009. [Abstract]

Sato T., K. Okino, and H. Kumagai, Magnetic structure of an oceanic core complex at the Southernmost Central Indian Ridge: Analysis of shipboard and deep-sea three-component magnetometer data, Geochem. Geophys. Ceosyst., 10,Q06003,doi10.1029/2008GC002267, 2009. [Abstract]

Kim, Y.-M., Lee, S.-M. and K. Okino, Comparison of gravity anomaly between mature and immature intra-oceanic subduction zones in the western Pacific, Tectonophysics, 474, 657-673, 2009. [Abstract]

Okino, K., Y. Ohara, T. Fujiwara, S.-M. Lee, Y. Nakamura, K. Koizumi and S. Wu, Tectonics of the southern tip of the Parece Vela Basin, Tectonophysics, 466, 213-228, 2009. [Abstract] [PDF]

Kandilarov A., R. Mjerde, K.Okino and Y. Murai, Crustal structure of the ultra-slow spreading Knipovich Ridge, North Atlantic, along apresumed amagmatic portion of oceanic crustal formation, Marine Geophysycal Researches, 29, 109-134, 2008. [Abstract]

Kumagai H., K. Nakamura, T. Toki, T. Morishita, K. Okino, J. Ishibashi, U. Tsunogai, S. Kawagucchi, T. Gamo, T. Shibuya, T. Sawaguchi, N. Neo, M. Joshima, T. Sato and K. Takai, Geological background fo the Kairei and Edmond hydrothermal fields along the Central Indian Ridge: Implications for their vent fluids' distinct chemistry, Geofluids, 8, 1-13, 2008. [Abstract]

Ohara, Y., J. Kasahara, and K. Okino, Seismic study on oceanic core complexes in the Parece Vela backarc basin, Island Arc, 16, 3, 348-360, 2007. [Abstract]

Connelly, D. P., C. R. German, M. Asada, K. Okino, A. Egorov, T. Naganuma, N. Pimenov, G. Cherkashev, and K. Tamaki, Hydrothermal activity on the ultra-slow spreading southern Knipovich Ridge, Geochem. Geophys. Geosyst., 8, Q08013, doi:10.1029/2007GC001652, 2007. [Abstract]

Cannat, M., D. Sauter, V. Mendel, E. Ruellean, K. Okino, J. Escartin, V. Combier, M. Baala, Modes of seafloor generation at a melt-poor ultraslow-spreading ridge, Geology, 34, 7, 605-608, 2006. [Abstract]

K. Okino, K. Matsuda, D. Christie, Y. Nogi and K. Koizumi, Development of oceanic detachment and asymmetric spreading at the Australian-Antarctic Discordance, Geochem. Geophys. Geosyst., 5(12), Q12012, doi:10.1029/2004GC000793, 2004. [Abstract] [PDF]

Yamazaki, T., N. Seama, K. Okino, K. Kitada, M. Joshima, H. Oda and J. Naka, Spreading process of the norhtern Mariana Trough: rifting-spreading transition at 22。N, Geochem. Geophys. Geosyst., 4(9), 1075, doi:10:1029/2002GC00492,2003. [Abstract]

Okino, K., and K. Fujioka, The Central Basin Spreading Center: variations in spreading style and implications for marginal basin formation, J. Geophys. Res., 108(B1), 2040, doi:10.1029/2001JB001095,2003. [Abstract] [PDF]

Deschamps, A., K. Okino, and K. Fujioka, Late amagmatic extension along the central and eastern segments of the West Phhilippine Basin fossil spreading axis, Earth Planet. Sci. Lett., 203,277-293, 2002.[Abstract]

Okino, K., D. Curewitz, M. Asada, K. Tamaki, P. Vogt, and K. Crane, Segmentation of the Knipovich Ridge implication for focused magmatism and effect of ridge obliquity at an ultraslow spreading system, Earth Planet. Sci. Lett., 202, 275-288,2002.[Abstract] [PDF]

Fujioka, K., K. Okino, T. Kanamatsu, and Y. Ohara, Morphology and origin of the Challenger Deep in the Southern Mariana Trench, Geophys. Res. Lett. , 29, 10,1029 2002. [Abstract]

Yamazaki, T., K. Okino, Y. Hasegawa, H. Saitake, and M. Ito, Geophysical mapping of Mariana Trough and West Philippine Basin: a preliminary report of Kairei KR9812 cruise, JAMSTEC Deep Sea Res.、15, 63-72, 1999. [Abstract]

Fujioka, K., K. Okino, T. Kanamatsu, Y. Ohara, O. Ishizuka, S. Haravuchi, and T. Ishii, Enigmatic extinct spreading center in the West Philippine backarc basin unveiled, Geology, 27, 12, 1135-1138, 1999. [Abstract]

Okino, K., Y. Ohara, S. Kasuga, and Y. Kato, The Philippine Sea: New survey results reveal the structure and the history of the marginal basins, Geophys. Res. Lett., 26, 2287-2290, 1999. [Abstract] [PDF]

Okino, K. , S. Kasuga, and Y. Ohara, A new scenario of the Parece Vela Basin genesis, Mar. Geophys. Res., 20, 21-40, 1998. [Abstract]

Okino, .K., F. Yamamoto, Y. Kato, Making of "seafloor stereograph" from side-looking sonar imagery and swath bathymetry, Rept. Hydrogrph. Res., 34, 71-83, 1998 (in Japanese with English abstract). [Abstract]

Nishizawa, A., M. Nakagawa, K. Okino, and N. Izumi, Swath bathymetry using SeaBeam 2000 around Japan - statsitical estimation of subduction seafloor morphology- , Rept. Hydrogrph. Res., 33, 61-83, 1997 (Japanese with English abstract). [Abstract]

Ohara, Y., S. Kasuga, K. Okino, and Y. Kato, Survey maps, Philippine Sea Structures, Eos, Transactions, AGU., 78, 48, 555,1997.

Iwabuchi, Y., S. Kasuga, S. Kokuta, and K. Okino, Active faults in the Western Osaka bay and adjacent area, J. Japan Soc. Marine Surveys and Technology, 7, 2, 11-19, 1995 (Japanese with English abstract). [Abstract]

Okino, K., and Y. Kato, Geomorphological study on a clastic accretionary prism: The Nankai Trough, The Island Arc, 4, 182-198, 1995. [Abstract]

Fujiokia, K., H. Wada, K. Okino et al., Izu-Bonin transect dive program ミcross section of oceanic crust, serpentinite seamount, manganese pavement-, JAMSTEC Deep Sea Res., 10, 1-35, 1994 (Japanese with English abstract). [Abstract]

Okino, K., H. Tookuyama, and Y. Kato, Tectonics of the ogasawara Plateau and the adjacent region - results of "Shinkai 6500" dives #145 and #146-, JAMSTEC Deep Sea Res., 10, 111-122, 1994. (Japanese with English abstract) [Abstract]

Okino, K. and K. Fujioka, Geomorphology and geology of the Kinan Escarpment in the Shikoku Basin - Results of Dive #176 and #177-, JAMSTEC Deep Sea Res., 10, 111-122, 1994. (Japanese with English abstract) [Abstract]

Okino, K., A. Nishizawa, and A. Asada, Crustal structure survey in the norhtwestern part of the Sagami Bay, Rept. Hydrogrp. Res., 30, 383-393, 1994. (Japanese with English abstract) [Abstract]

Okino, K., Y., Shimakawa, and S., Nagaoka, Evolution of the Shikoku Basin, J. Geomag. Geoelectr., 46, 463-479, 1994. [Abstract]

Nishizawa, A., K. Okino, and K. Fujioka, Topography of the seaward slope of the Central Yap Trench, JAMSTEC Deep Sea Res., 10, 251-259, 1994 (Japanese with English abstract). [Abstract]

Kasuga, S., Y. Kato, S. Kimura, K. Okino et al., Characteristics of arc-trench systems and back-arc basins in the southern waters of Japan - Outline of the geophysical survey by the Hydrographic Department of Japan -, Rept. Hydrogrp. Res., 28, 19-53, 1992 (Japanese with English abbstract). [Abstract]

Okino, K., and Y. Kato, What is the Oki-Daito Ridge?, Rept. Hydrogrp. Res., 28, 269-292, 1992 (Japanese with English abstract). [Abstract]

Okino, K., M., Ando, S. Kaneshima, and K. Hirahara, The horizontally lying slab, Geophys. Res. Lett., 16, 1059-2062, 1989. [Abstract]


Urabe. T., Okino K., Sunamura M., Ishibashi J., Takai K. and Suzuki K., Trans-crustal Advections and In-situ Biogeochemical Processes of Global Sub-seafloor Aquifer: The Sub-seafloor "TAIGA", Journal of Geography, 118, 1027-1036, 2009 (in Japanese).

Kawada K.. Seama N and Okino K., Review of Oceanic Crustal Structure and Seafloor Hydrothermal Circulation, Journal of Geography, 118,1037-1063, 2009 (in Japanese).

Martinez, F., K. Okino, Y. Ohara, A.-L. Reysenbach and S. K. Goffredi, Back-Arc Basins, Oceanography, 20,1, 116-127, 2007.[Abstract] [PDF]

Isezaki, N. and K. Okino, Magnetic Anomalies in the Philippine Sea, In H. Tokuyama, S.A. Shcheka, N Isezaki et al, ed. Geology and Geophysics of the Philippine Sea, TERRAPUB, 39-49, 1995. [Abstract]

Kobayashi, K., S. Kasuga, and K. Okino, Shikoku Basin and its Margins, In B. Taylor ed. Backarc Basins: tectonics and magmatism , Plenum Press, 381-405, 1995. [Abstract]


Nakanishi M. and Okino K., Ocean Floor Geoscience, 318pp., University of Tokyo Press, Tokyo, 2016 (in Japanese)

K. Okino, Seafloor Morphology, Geological Society of Japan ends., Foundation of Ocean Floor Science, 10-19, KYORITSU SHUPPAN CO., Tokyo, 2016.

K. Okino, K. Nakamura, Y. Nogi, M. Fujii, N. Mochizuki, M. Asada and C. Honsho, Characterization of a new hydrothermal vent based on magnetic and acoustic surveys, Underwater Technology Symposium (UT), 2013 IEEE International, doi: 10.1109/UT.2013.6519827, 2013.

Fujii M., Okino K., Honsho C., Dyment J., Szitkar F., and Mochizuki N., Developing near-bottom magnetic measurements using a 3D forward moiling technique: Application to hydrothermal vent fields, Underwater Technology Symposium (UT), 2013 IEEE International, doi: 10.1109/UT.2013.6519860, 2013.

Okino, K. and Y. Ohara, Oceanic core complex in the Parece Vela Basin, Monthly chikyu 26, 10, 717-724, 2004.

Ohara, Y. and K. Okino, Tectonic evolution of the southern Parece Vela Basin, Monthly Chikyu 26, 10, 711-716, 2004.

Ohara, Y., K. Okino, J. E. Snow, and KR03-01Shipboard Scientific Party, Preliminary report of Kairiei KR03-01 cruise: amagmatic tectonics and lithospheric composition of the Parece Vela Basin, InterRidge News, 12(1), 27-29, 2003. [PDF]

Ohara, Y., J. E. Snow, K. Okino, and K. Fujioka, Kairei KR03-01: Mantle peridotites in a backarc basin setting, InterRidge News, 11(2), 32-35, 2002.

Okino, K., H. Tokuyama, and HOTWATER Scientific party, Deep-tow sonar "WADATSUMI" survey in the Okinawa Trough, InterRidge News, 11(2), 36-39, 2002. [PDF]

Okino, K., C. Tamura, K. Tamaki , and H. Fujimoto, Extinct spreading center of the Parece Verla Basin, a result of deep-tow magnetic survey, Proceedings of OHP/ION joint Symposium, 125-126, 2001. [PDF]

Fujioka, K, T. Kanamatsu, Y. Ohara, H. Fujimoto, K. Okino, C. Tamura, S.E. Lallemand, A. Deschanps-Boldrini, J.A. Barretto, N. Togashi ,H. Yamanobe, A. So, Parece Vela Rift and Central basin Fault revisited -STEPS-IV (structure, tectonics and evolution of the Philippine Sea) a cruise summary report, InterRidge News 9(1) 18-22, 2000. [PDF]

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