Fossa de Nankai

La fossa de Nankai 南海 トラフ (Nankai Torafu, 南海 トラフ^?), en anglès Nankai Trough és una fossa submarina o més exactament, una depressió estructural linear (trough) situada al sud de l'illa Honshū al Japó. S'estén al llarg de 900 km del litoral. En la tectònica de plaques, la Fossa de Nankai marca una zona de subducció que és causada per la subducció de la placa del Mar de les Filipines per sota de part de la placa d'Euràsia del Japó. Dins la Fossa de Nankai hi ha una gran quantitat de sediments de la rasa deformes (Ike, 2004), per la qual cosa és un dels millors exemples de la Terra de prisma d'acreció. A més els estudis de reflexió sísmica han revelat la presència de muntanyes submarines en els sediments(Ike, 2004).

Localització de la fossa de Nankai.

El nom de "Nankai" significa "mar del sud".

Sismicitat

Historial de terratrèmols a la fossa Nankai-Tonankai-Tokai.

La fossa de Nankai és l'extensió prop de la superfície d'una zona d'activitat sísmica activa que es submergeix per sota del sud-oest del Japó.

Bibliografia

• Baba, T., Cummins, P. R., 2005, Contiguous rupture area of two Nankai Trough earthquakes revealed by high resolution tsunami waveform inversion, Geophysical Research Letters, v. 32, doi:1029/2004GL022320.
• Collett, T. S., 2002, Energy resources potential of natural gas hydrates, AAPG Bulletin, v. 86, pp. 1971–92.
• Colwell, F., Matsumoto, R., Reed, D., 2004, A Review of gas hydrate, geology and biology of the Nankai Trough, Chemical Geology, v. 205, pp. 391–404.
• Davis, E., Becker, K., Wang, K., Obara, K., Ito, Y., Kinoshita, M., 2006, A discrete episode of seismic and aseismic deformation of the Nankai trough subduction zone accretionary prism and incoming Philippine Sea plate, Earth and Planetary Science Letter 242, pp. 73–84.
• DeMets, C., Gordon, R., Argus, D., Stein, S., 1990, Current plate motions, Geophysical Journal International, v. 101, pp. 425–478.
• Demets, C., Gordon, R., ARgus, D., Stein, S., 1994, Effects of recent revisions to the geomagnetic reversal time scale on estimates of current plate motions, Geophysical Research Letters, v. 21, n. 20 pp. 2191–2194.
• Hori, T., Kato, N., Hirahara, K., Baba, T., Keneda, Y., 2004, A numerical simulation of earthquake cycles along the Nakai Trough in southwest Japan: lateral variation in frictional property due to the slab geometry controls the nucleation position, Earth and Planetary Science Letter, v. 22, pp. 215–226.
• Kastner, 2001, Gas ydrates in convergent margins: formation, occurrence, geochemistry, and global significance. Natural Gas Hydrates: Occurrence, Distribution and Detection. Geophysical Monograph, vol. 124. American Geophysical Union Washington, DC, pp. 67–86.
• Krason, 1994, Study of 21 marine basins indicates wide prevalence of hydrates, Offshore, August, pp. 34–35.
• Ike, T., More, G., Okano, T., Kuramoto, S., Taira, A., Along strike changes in basement topography and sediment thickness in the northern Shikoku Basin: Variable inputs to the Nankai Trough Seismogenic Zone, EOS Transaction, American Geophyiscal Union, vol. 85, Fall Meeting Supplements.
• Katsushisa, K., Masayuki, T., 2004, Short-period seismic radiation zones of a megathrust fault along the Nankai, Trough deduced from inversion analysis of seismic intensity data, Journal of Seismilogical Society of Japan, v. 57, no. 2, pp 153–177.
• Matsushima, J., 2006, Seismic wave attenuation in methane hydrate-bearing sediments: Vertical seismic profiling data from the Nankai Trough exploratory well, offshore Tokai, central Japan, Journal of Geophysical Research, v. 111, B10101, doi:10.1029/2005JB004031
• Hitoshi, M., Masonori, I., Tadanor, G., Takafu, K., 2006, Current research status and meaning of fluid pressure monitoring at the Nankai Trough, Journal of Geography, v. 115, n. 3, pp. 367–382.
• Mitsui, N., Hirahara, K., 2004, Simple spring-mass Model simulation of earthquake cycle along the Nankai Trough in Southwest Japan, Pure Applied Geophysics, v. 161, pp. 243302450.
• Muramatsu, Y., Doi, T., Tomaru, H., Fehn, U., Takeuchi, R., Matsumote, R., 2006, Hologen concentrations in pore waters and sediments of the Nankai, Trough, Japan: Implications for the origin of gas hydrates, Applied Geochemistry, v. 22, pp. 534–556.
• Obana, K., Kodaira, S., Keneda, Y., 2005, Seismicity in the incoming/subducting Philippine Sea plate off the Kii Peninsula, central Nankai trough, Journal of Geophysical Research, v. 110, doi:10.1029/2004JB003487.
• Obana, K., Kodaira, S., Kaneda, Y., 2006, Seismicity related to heterogeneous sstructure along the western Nankai trough off Shikiku Island, Geophysical Research Letters, doi:10.1029/2006GL028179.
• Operto, S., Virieux, J., Dessa, J., Pascal, G., 2006, Crustal seismic imaging from multifold on bottom seismometer data by frequency domain full waveform tomography: Application to the eastern Nankai trough, Journal of Geophysical Research, v. 111, doi:1029/2005/B003835.
• Pisani, P., Reshef, M., Moore, G., 2005, Targeted 3-D prestack depth imaging at Legs 190-196 ODP drill sites (Nankai Trough, Japan), Geophysical Research Letters, v. 32, doi: 10,1029/2005GL024191.
• Saffer, D., Underwood, M., McKiernan, A., 2005, Smectitie transformation in the Nankai trough: Effects on subduction zone mechanics and hydrogeology, Paper, No. 245-10, 2005 Salt Lake City Annual Meeting.
• Saito, H., Suzki, N., 2007, Terrestria organic matter controlling gas hydrate formation in the Nankai Trough accretionary prism, offshore Shikoku, Japan, Journal of Geochemical Exploration, v. 95, pp. 88–100.
• Sella, G., Dixon, T., Mao, A., 2002, REVEL: A model for Recent plate velocities from space geodesy, Journal of Geophysical Research, v. 107, n. B4, doi:10.1029/2000JB000333.
• Spinelli, G., Mozley, P., Tobin, H., Hoffman, N., Bellew, G., 2007, Diagenesisi, sediment strength, and pore collapse in sediment approaching the Nankai Trough subduction zone, GSA Bulletin, v. 119, pp. 377–390.
• Steurer, J., Underwood, M, 2003, Clay mineralogy of mudstone from the Nankai Trough reference sites 1173 and 1177 and frontal accretionary prism site 1174, Ms 190SR-211, http://www-odp.tamu.edu/publications/190196SR/211/211_.htm
• Takahashi, N., Kodaira, S., Park, J., Deibold, J., 2003, Heterogeneous structure of western Nankai seismogenic zone deduced by multichannel reflection data and wide-angle seismic data, Tectonophysics, v. 364, pp. 167–190.
• Tanioka, Y., Kusunose, T., Babu, T., Haseqawa, Y., 2004, Large earthquake along the Nankai trough, the 1944 Tanankai earthquake (Mw 8.0) and two 2004 Tonankai-oki earthquakes (Mw 7.2 and 7.4), EOS Transactions, AGU, v. 85.
• Tomaru, H., Lu, Z., Fehn, U., Muramatsu, Y., Matsumoto, R., 2007, Age variations of pore water iodine in the eastern Nankai Trough, Japan: Evidence for different methane sources in a large gas hydrate field, Geology, v. 35, no. 11, pp. 1015–1018.
• Volti, T., Kaneda, Y., Zatsepin, S., Crampin, S., 2005, An anomalous spatial pattern of shear-wave spitting observed of Ocean Bottom Seismic data above a subducting seamount in the Nankai Trough, Geophysics Journal International, v. 163, pp. 252–264.
• Zhao, S., Wu, X., Hori, T., Smith, A., Kaneda, A., Takemoto, S., 2003, Deformation and stress localization at the Nankai subduction zone, southwest Japan, Earth and Planetary Science Letters, v. 206, pp. 145–160.
• Zang, S., Chen, Q., Ning, J., Shen, Z., Liu, Y., 2002, Motion of the Philippine Sea plate consistent with NUVEL-1A model, Geophyiscal Journal International, v. 150, pp. 809–819.