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  • 1
    Electronic Resource
    Electronic Resource
    Slip zone and energetics of a large earthquake from the Taiwan Chelungpu-fault Drilling Project (2006)
    [s.l.] : Nature Publishing Group
    Nature 444 (2006), S. 473-476 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Determining the seismic fracture energy during an earthquake and understanding the associated creation and development of a fault zone requires a combination of both seismological and geological field data. The actual thickness of the zone that slips during the rupture of a large earthquake ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature05253
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Thematic Section: The 1999 Chi-Chi earthquake and behavior of the Chelungpu Fault (2005)
    Melbourne, Australia : Blackwell Science Pty
    The @island arc 14 (2005), S. 0 
    Details
    ISSN: 1440-1738
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1440-1738.2004.00452.x
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  • 3
    Electronic Resource
    Electronic Resource
    Arc–arc collision in the Izu collision zone, central Japan, deduced from the Ashigara Basin and adjacent Tanzawa Mountains (1998)
    Oxford UK : Blackwell Science Pty
    The @island arc 7 (1998), S. 0 
    Details
    ISSN: 1440-1738
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: The Pleistocene Ashigara Basin and adjacent Tanzawa Mountains, Izu collision zone, central Japan, are examined to better understand the development of an arc–arc orogeny, where the Izu–Bonin – Mariana (IBM) arc collides with the Honshu Arc. Three tectonic phases were identified based on the geohistory of the Ashigara Basin and the denudation history of the Tanzawa Mountains. In phase I, the IBM arc collided with the Honshu Arc along the Kannawa Fault. The Ashigara Basin formed as a trench basin, filled mainly by thin-bedded turbidites derived from the Tanzawa Mountains together with pyroclastics. The Ashigara Basin subsided at a rate of 1.7 mm/year, and the denudation rate of the Tanzawa Mountains was 1.1 mm/year. The onset of Ashigara Basin Formation is likely to be older than 2.2 Ma, interpreted as the onset of collision along the Kannawa Fault. Significant tectonic disruption due to the arc–arc collision took place in phase II, ranging from 1.1 to 0.7 Ma in age. The Ashigara Basin subsided abruptly (4.6 mm/year) and the accumulation rate increased to approximately 10 times that of phase I. Simultaneously, the Tanzawa Mountains were abruptly uplifted. A tremendous volume of coarse-grained detritus was provided from the Tanzawa Mountains and deposited in the Ashigara Basin as a slope-type fan delta. In phase III, 0.7–0.5 Ma, the entire Ashigara Basin was uplifted at a rate of 3.6 mm/year. This uplift was most likely caused by isostatic rebound resulting from stacking of IBM arc crust along the Kannawa Fault which is not active as the decollement fault by this time. The evolution of the Ashigara Basin and adjacent Tanzawa Mountains shows a series of the development of the arc–arc collision; from the subduction of the IBM arc beneath the Honshu Arc to the accretion of IBM arc crust onto Honshu. Arc–arc collision is not the collision between the hard crusts (massif) like a continent–continent collision, but crustal stacking of the subducting IBM arc beneath the Honshu Arc intercalated with very thick trench fill deposits.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1440-1738.1998.00193.x
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  • 4
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    (Table 2) CT scan measurements of ODP Site 131-808 (1993)
    PANGAEA
    In:  Supplement to: Soh, Wonn; Byrne, Timothy; Taira, Asahiko; Kono, Atsushi (1993): Computed tomography (CT) scan image analysis of Site 808 cores: structural and physical property implications. In: Hill, IA; Taira, A; Firth, JV; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 131, 135-140, https://doi.org/10.2973/odp.proc.sr.131.113.1993
    Details
    Publication Date: 2024-01-09
    Description: X-ray computed tomography (CT) is a promising tool that yields data useful for understanding the fine-scale density structure of partly lithified and tectonically deformed sediments. We conducted 21 CT scans of ODP Leg 131 sediments, including whole-round cores and thin-section chips, obtained from the toe of the Nankai accretionary prism. The samples range from highly deformed pieces from the frontal thrust and décollement to homogeneous and essentially undeformed sediments above the frontal thrust and beneath the décollement. In the CT images, kink-like deformation bands and faults are recognized as obvious bright seams, bands, or stripes with relatively high linear attenuation coefficients. The differences in linear attenuation coefficients relative to the matrix range from 0.021 cm**2/g (kink-like deformation band) to 0.038 cm**2/g (fault). These data suggest a 0.10 g/cm**3 to 0.18 g/cm**3 increase in bulk density within the deformation structures, and they appear to be 13% and 33% more compacted than the nondeformed matrix, respectively. In contrast to the samples from the frontal thrust zone, CT images of the décollement sample exhibit relatively homogeneous textures. The attenuation coefficient of the sample of the décollement indicates bulk density and porosity values of 2.45 g/cm**3 and 18%, respectively. The sample, hence, is approximately 50% more compacted than the sediment outside the décollement zone.
    Keywords: 131-808; Attenuation value; Attenuation value, standard deviation; COMPCORE; Composite Core; Density, wet bulk; DEPTH, sediment/rock; DSDP/ODP/IODP sample designation; Joides Resolution; Leg131; Ocean Drilling Program; ODP; Philippine Sea; Porosity; Sample code/label; Sample comment; X-ray computed tomography (CT)
    Type: Dataset
    Format: text/tab-separated-values, 116 data points
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  • 5
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    (Table 1) Peak intensities of minerals in volcanic ash from ODP Site 131-808 (1993)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 131-808A; 131-808B; 131-808C; Analcite (Intensity, 5.6Å); Calcite (Intensity, 3.0Å); Chlorite (Intensity, 7.6Å); Clay minerals (Intensity, 15Å); Clinoptilolite (Intensity, 9.0Å); DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Feldspar (Intensity, 3.20Å); Hornblende (Intensity, 8.6Å); Illite (Intensity, 9.8Å); Joides Resolution; Leg131; Ocean Drilling Program; ODP; Philippine Sea; Quartz (Intensity, 3.34Å); Sample code/label; X-ray diffraction (XRD)
    Type: Dataset
    Format: text/tab-separated-values, 720 data points
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  • 6
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    (Table 2) Major element composition of volcanic ash from ODP Site 131-808 (1993)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 131-808A; 131-808B; 131-808C; Aluminium oxide; Calcium oxide; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Elements, total; Event label; Iron oxide, Fe2O3; Joides Resolution; Leg131; Loss on ignition; Magnesium oxide; Manganese oxide; Ocean Drilling Program; ODP; Philippine Sea; Phosphorus pentoxide; Potassium oxide; Sample code/label; Silicon dioxide; Sodium oxide; Titanium dioxide; X-ray fluorescence (XRF)
    Type: Dataset
    Format: text/tab-separated-values, 909 data points
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  • 7
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    (Table 1) Summary of CT values, attenuation coefficients, density, and porosity of ODP Site 131-808A samples (1993)
    PANGAEA
    In:  Supplement to: Byrne, Timothy; Maltman, Alex J; Stephenson, Emma; Soh, Wonn; Knipe, Rob (1993): Deformation structures and fluid flow in the toe region of the Nankai accretionary prism. In: Hill, IA; Taira, A; Firth, JV; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 131, 83-101, https://doi.org/10.2973/odp.proc.sr.131.107.1993
    Details
    Publication Date: 2024-01-09
    Description: This paper presents results of an interdisciplinary investigation of the relation between fluids, fluid flow, and deformation in the toe region of the Nankai accretionary prism. The techniques include thin-section petrography, SEM, TEM and microprobe analyses, and X-ray computed tomography as well as laboratory experiments. Together, the data suggest three structural/hydrologic regimes within the prism. These are: (1) the accreting sediments above the décollement zone, (2) the décollement zone, and (3) the underthrust sediments. The regime above the décollement is characterized by sediments that are progressively dewatered through both a penetrative fabric and a pervasive, but apparently poorly interconnected, set of core-scale deformation structures. The décollement is characterized by a relatively high density of structures/meter and is considered to be a regime of low stress but frequent failure. Hydrologically the décollement retards the vertical flow of fluids and enhances the potential for overpressuring in the footwall. Finally, the footwall regime contains very few tectonic structures and is structurally isolated from the stresses related to plate convergence. This regime provides an important component to the tectonics of the Nankai prism, however, because it supplies the overpressured fluids that cause the d?collement to fail at relatively low shear stresses.
    Keywords: 131-808; Attenuation value; COMPCORE; Composite Core; Computer tomograph value; Density; DEPTH, sediment/rock; Difference; DSDP/ODP/IODP sample designation; Joides Resolution; Leg131; Number; Ocean Drilling Program; ODP; Philippine Sea; Porosity; Sample code/label; Water content, wet mass; X-ray computed tomography (CT)
    Type: Dataset
    Format: text/tab-separated-values, 161 data points
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  • 8
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    Mineralogy and major-element chemistry of volcanic ash of ODP Site 131-808 (1993)
    PANGAEA
    In:  Supplement to: Masuda, Harue; Tanaka, Hiroaki; Gamo, Toshitaka; Soh, Wonn; Taira, Asahiko (1993): Major-element chemistry and alteration mineralogy of volcanic ash, Site 808 in the Nankai Trough. In: Hill, IA; Taira, A; Firth, JV; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 131, 175-183, https://doi.org/10.2973/odp.proc.sr.131.118.1993
    Details
    Publication Date: 2024-01-09
    Description: Mineralogical and major-element compositions of 72 samples of volcanic ash, recovered from Site 808 at Nankai Trough during Leg 131, were analyzed in relation to the early diagenetic alteration. Alteration products are first observed at the following depths: smectite, 200 mbsf; clinoptilolite, 646 mbsf; and analcite, 810 mbsf. Glass decomposition dominates over authigenic mineral formation between 200 and 550 mbsf in the sediment column, whereas mineral formation becomes dominant below 550 mbsf. Based on the X-ray diffraction patterns, a broad and asymmetric peak of 15A suggests a presence of illite/smectite (I/S) mixed-layered minerals in a sample from 646 mbsf. I/S mixed-layered mineral formation, however, rarely occurs even at the bottom of the sediment column (1290 mbsf) at 120° C. This is possibly because zeolite (especially clinoptilolite) formed in the ash interferes with illite formation in the smectite. The formation of alteration minerals affects the major-element chemistry of the ash and the interstitial waters. H4SiO4 concentrations in interstitial waters increase during glass decomposition and decrease with smectite and clinoptilolite formation. K is removed from interstitial water into smectite and/or clinoptilolite. Mg is fixed into smectite (and/or chlorite).
    Keywords: 131-808A; 131-808B; 131-808C; DRILL; Drilling/drill rig; Joides Resolution; Leg131; Ocean Drilling Program; ODP; Philippine Sea
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 9
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    Bedforms produced by the Kuroshio Current passing over the northern Izu Ridge (2004)
    Springer
    Details
    Publication Date: 2004-02-01
    Print ISSN: 0276-0460
    Electronic ISSN: 1432-1157
    Topics: Geosciences
    Published by Springer
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  • 10
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    Transport processes deduced from geochemistry and the void ratio of surface core samples, deep sea Sagami Bay, central Japan (2003)
    Elsevier
    Details
    Publication Date: 2003-04-01
    Print ISSN: 0079-6611
    Electronic ISSN: 1873-4472
    Topics: Geosciences , Physics
    Published by Elsevier
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