●紀伊半島熊野沖南海トラフと四国海盆 (Park et al., Butsuri Tansa, 2009)

Final 3D PSDM interval velocity model overlapped by seismic reflection data. Inline, crossline, and depth slices are sho

●紀伊半島熊野沖南海トラフ (Park et al., Geology, 2010; Moore et al., Proc. IODP, 2009; Uraki et al., Butsuri Tansa, 2009; Strasser et al., Nature Geoscience, 2009)

Final 3D prestack depth migration (PSDM) results. A: 3D view of seismic reflection image. B: P-wave velocity model derived from the 3D PSDM.

2.3次元MCSデータとIODP掘削データを用いた統合物性解析(Core-log-seismic Integration)の研究

●紀伊半島熊野沖南海トラフと四国海盆 (Naito and Park, Butsuri Tansa, 2014)

Fractional porosity profile on inline # 95 for entire 3D survey area. IODP Sites C0011 and C0012 are located along this inline.


●南海トラフ (Park et al., Geophysical Research Letters, 2014)

Time-migrated MCS profile of line 2 showing the fluid-rich décollement. An ODP Site 808 is positioned. Inset: Enlarged sections of seafloor and décollement are shown. Note reverse polarity reflection of the décollement (black-red-black), compared with seafloor (red-black-red). Porosity (red dot) and density (blue dot) measurements at Site 808 are plotted. We observe significant contrasts of the porosity and density measurements around the décollement level.


●南海トラフ (Park et al., Journal of Geophysical Research, 2002; Park et al., Science, 2002; Park et al., Earth and Planetary Science Letters, 2004 など)

Depth migrated MCS profiles showing the splay faults. Subducting oceanic crust is shaded by light blue color. Seaward distribution of the 1944 Tonankai coseismic slips estimated from tsunami (red line) and seismic (blue line) inversions are projected in the profiles. Locations of both the splay fault's initial branching and the décollement stepdown to the top of the oceanic basement are marked in red dotted circles. Green and black arrows show motions of the splay fault slip and the décollement or normal fault, respectively.