Results 21 to 30 of about 608 (138)

Influence of Early Low‐Temperature and Later High‐Temperature Diagenesis on Magnetic Mineral Assemblages in Marine Sediments From the Nankai Trough

open access: yesGeochemistry, Geophysics, Geosystems, Volume 22, Issue 10, October 2021., 2021
Abstract Diagenesis can have a major impact on sedimentary mineralogy. Primary magnetic mineral assemblages can be modified significantly by dissolution or by formation of new magnetic minerals during early or late diagenesis. At International Ocean Discovery Program Site C0023, which was drilled in the protothrust zone of the Nankai Trough during ...
Myriam Kars   +8 more
wiley   +1 more source

Geotechnical behavior of mudstones from the Shimanto and Boso accretionary complexes, and implications for the Nankai accretionary prism [PDF]

open access: yes, 2014
Triaxial shear tests on mudstone samples from the Shimanto Belt and the Boso accretionary complexes (SW Japan and central Japan) were carried out. Pre-exhumation burial depths in the two paleo-accretionary prisms were up to 9,000 m and about 1,000 m for
Behrmann, Jan H.   +5 more
core   +3 more sources

The First D/V Chikyu IODP Operations: Successful Logging and Coring During NanTroSEIZE Stage 1 Expeditions [PDF]

open access: yesScientific Drilling, 2008
No abstract available.
S. Kuramoto   +4 more
doaj   +1 more source

In situ stress magnitude and rock strength in the Nankai accretionary complex: a novel approach using paired constraints from downhole data in two wells [PDF]

open access: yes, 2016
We present a method to simultaneously constrain both far-field horizontal stress magnitudes (S hmin and S Hmax) and in situ rock unconfined compressive strength (UCS), using geophysical logging data from two boreholes located 70 m apart that access the ...
Dugan, B., Huffman, K.A., Saffer, D.M.
core   +1 more source

Anelastic strain recovery reveals extension across SW Japan subduction zone [PDF]

open access: yes, 2009
Sediment dominated convergent margins typically record substantial horizontal shortening often associated with great earthquakes. The convergent margin south of Japan is arguably one of the most extensively investigated margins and previous studies ...
Akito Tsutsumi   +35 more
core   +1 more source

Insight into the Sealing Capacity of Mudrocks determined using a Digital Rock Physics Workflow [PDF]

open access: yes, 2019
Primary objective: To better understand seal capacity in mudrocks and to determine the conditions under which a mudrock seal fails by allowing a non-wetting fluid to percolate.
Bihani, Abhishek   +5 more
core   +1 more source

P and S wave velocity measurements of water-rich sediments from the Nankai Trough, Japan [PDF]

open access: yes, 2014
Acoustic velocities were measured during triaxial deformation tests of silty clay and clayey silt core samples from the Nankai subduction zone (Integrated Ocean Drilling Program Expeditions 315, 316, and 333).
Behrmann, Jan H.   +4 more
core   +1 more source

Sedimentary inputs to the Nankai subduction zone: The importance of dispersed ash [PDF]

open access: yes, 2018
We examine the importance of dispersed volcanic ash as a critical component of the aluminosilicate sediment entering the Nankai Trough, located south of Japan’s island of Honshu, via the subducting Philippine Sea plate.
Kutterolf, Steffen   +5 more
core   +1 more source

Interpretation of porosity and LWD resistivity from the Nankai accretionary wedge in light of clay physicochemical properties: Evidence for erosion and local overpressuring [PDF]

open access: yes, 2011
International audienceIn this study, we used porosity to assess the compaction state of the Nankai accretionary wedge sediments and any implications for stress and pore pressure.
Archie   +47 more
core   +4 more sources

Determination of stress state in deep subsea formation by combination of hydraulic fracturing in situ test and core analysis: A case study in the IODP Expedition 319

open access: yes, 2013
[1] In situ test of hydraulic fracturing (HF) provides the only way to observe in situ stress magnitudes directly. The maximum and minimum horizontal stresses, SHmax and Shmin, are determined from critical borehole pressures, i.e., the reopening pressure
Boutt, David   +21 more
core   +1 more source

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