mirage   mirage   mirage

Interactions between deformation and fluids in the frontal thrust region of the NanTroSEIZE transect offshore the Kii Peninsula, Japan: Results from IODP Expedition 316 Sites C0006 and C0007

DSpace/Manakin Repository

Show simple item record

dc.creator Sceaton, E.
dc.creator Kimura, G.
dc.creator Curewitz, D.
dc.creator Moore, G.
dc.creator Chester, F.
dc.creator Fabbri, O.
dc.creator Fergusson, C.
dc.creator Girault, F.
dc.creator Goldsby, D.
dc.creator Harris, Robert N.
dc.creator Inagaki, F.
dc.creator Jiang, T.
dc.creator Kitamura, Y.
dc.creator Knuth, M.
dc.creator Li, C.-F.
dc.creator Claesson Liljedahl, L.
dc.creator Louis, L.
dc.creator Milliken, K.
dc.creator Nicholson, U.
dc.creator Riedinger, N.
dc.creator Sakaguchi, A.
dc.creator Solomon, E.
dc.creator Stasser, M.
dc.creator Su, X.
dc.creator Tsutsumi, A.
dc.creator Yamaguchi, A.
dc.creator Ujiee, K.
dc.creator Zhao, X.
dc.date.accessioned 2010-07-10T00:04:16Z
dc.date.available 2010-07-10T00:04:16Z
dc.date.issued 2009-12-29
dc.identifier.citation Screaton , E., et al. (2009), Interactions between deformation and fluids in the frontal thrust region of the NanTroSEIZE transect offshore the Kii Peninsula, Japan: Results from IODP Expedition 316 Sites C0006 and C0007, Geochem. Geophys. Geosyst., 10, Q0AD01. en
dc.identifier.issn 1525-2027
dc.identifier.uri http://hdl.handle.net/1957/16532
dc.description Copyrighted by American Geophysical Union. en
dc.description.abstract Integrated Ocean Drilling Program (IODP) Expedition 316 Sites C0006 and C0007 examined the deformation front of the Nankai accretionary prism offshore the Kii Peninsula, Japan. In the drilling area, the frontal thrust shows unusual behavior as compared to other regions of the Nankai Trough. Drilling results, integrated with observations from seismic reflection profiles, suggest that the frontal thrust has been active since ~0.78–0.436 Ma and accommodated ~13 to 34% of the estimated plate convergence during that time. The remainder has likely been distributed among out-of-sequence thrusts further landward and/or accommodated through diffuse shortening. Unlike results of previous drilling on the Nankai margin, porosity data provide no indication of undercompaction beneath thrust faults. Furthermore, pore water geochemistry data lack clear indicators of fluid flow from depth. These differences may be related to coarser material with higher permeability or more complex patterns of faulting that could potentially provide more avenues for fluid escape. In turn, fluid pressures may affect deformation. Well-drained, sand-rich material under the frontal thrust could have increased fault strength and helped to maintain a large taper angle near the toe. Recent resumption of normal frontal imbrication is inferred from seismic reflection data. Associated décollement propagation into weaker sediments at depth may help explain evidence for recent slope failures within the frontal thrust region. This evidence consists of seafloor bathymetry, normal faults documented in cores, and low porosities in near surface sediments that suggest removal of overlying material. Overall, results provide insight into the complex interactions between incoming materials, deformation, and fluids in the frontal thrust region. en
dc.language.iso en_US en
dc.publisher American Geophysical Union en
dc.relation.ispartofseries Geochemistry, Geophysics, Geosystems en
dc.relation.ispartofseries Vol. 10 (2009) en
dc.subject subduction zone en
dc.subject Nankai en
dc.subject fluid flow en
dc.subject frontal thrust en
dc.subject IODP en
dc.subject seamount en
dc.title Interactions between deformation and fluids in the frontal thrust region of the NanTroSEIZE transect offshore the Kii Peninsula, Japan: Results from IODP Expedition 316 Sites C0006 and C0007 en
dc.type Article en
dc.identifier.doi 10.1029/2009GC002713


This item appears in the following Collection(s)

Show simple item record

Search ScholarsArchive@OSU


Advanced Search

Browse

My Account

Statistics