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  • 1
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    (Table 1) Summary of horizon, lithology, and paleomagnetic of ODP Hole 126-791B basaltic mousse samples (1992)
    PANGAEA
    In:  Supplement to: Koyama, Masato; Cisowski, Stanley M; Gill, James B (1992): Paleomagnetic estimate of emplacement mechanisms of deep basaltic volcaniclastic rocks in the Sumisu Rift, Izu-Bonin Arc. In: Taylor, B; Fujioka, K; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 126, 371-379, https://doi.org/10.2973/odp.proc.sr.126.144.1992
    Details
    Publication Date: 2024-01-09
    Description: A paleomagnetic study was made on the highly vesiculated basaltic tuff breccia (the basaltic mousse) drilled by Ocean Drilling Program Leg 126 from the Izu-Bonin backarc, Sumisu Rift, to estimate the mode of its emplacement. Thirty-four 10-cm**3 minicore samples were collected from almost all the horizons of the basaltic mousse. Stepwise thermal and alternating-field demagnetization experiments show that the natural remanent magnetizations of many samples are mainly composed of a single stable component. Although remanence inclinations are not expected to be disturbed by rotary drilling, the measured inclinations of remanence show a random directional distribution as a whole. The remanence inclinations, however, show directional consistency on a smaller scale. High-density sampling and measurements from a limited interval of drilled cores, and the measurement of small disks cut from a single minicore sample show that there is directional consistency over several centimeters. Strong and stable remanent magnetization, the existence of remanence direction consistency, and the fresh lithology of the samples suggest the thermal origin of remanence. Combining the paleomagnetic results with other geological, petrographical, and paleontological characters, the Hole 791B basaltic mousse can be interpreted as a subaqueous explosion breccia produced by deep-sea pyroclastic fountaining.
    Keywords: 126-791B; Clastics; Demag Type; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Joides Resolution; Leg126; Median demagnetizing field; NRM, Declination; NRM, Inclination; NRM, Intensity; Ocean Drilling Program; ODP; Philippine Sea; Piece; Sample code/label; Sample comment; Temperature, technical
    Type: Dataset
    Format: text/tab-separated-values, 378 data points
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  • 2
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    (Table 1) Remanence properties of samples from ODP Core 126-792A-7H (1992)
    PANGAEA
    In:  Supplement to: Cisowski, Stanley M; Koyama, Masato (1992): Detailed record of the Brunhes/Matuyama polarity reversal in high sedimentation rate marine sediments from the Izu-Bonin Arc. In: Taylor, B; Fujioka, K; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 126, 341-352, https://doi.org/10.2973/odp.proc.sr.126.142.1992
    Details
    Publication Date: 2024-01-09
    Description: A combination of high sedimentation rates and high concentrations of magnetic grains in cores from Ocean Drilling Program Leg 126 resulted in the recovery of detailed direction and intensity records of the Brunhes/Matuyama geomagnetic polarity reversal. Virtual geomagnetic poles (VGPs) computed from azimuthally oriented samples taken from the cores of Hole 792A in the western Izu-Bonin forearc basin reveal that the geomagnetic pole persisted at moderate to high southern latitudes for several thousand years before a rapid migration to northern latitudes. Alternating-field demagnetization behavior, as well as NRM, NRM/ARM, and NRM/IRM intensities for samples from this same interval, and the NRM/IRM intensities derived from unoriented core samples from Holes 790C and 791B, drilled in the ~100-km distant Sumisu Rift, all suggest that the dipole field oscillated widely in intensity before the reversal. The fast polarity change occurred at the low point of an ~1100-yr field intensity cycle. This "reversal cycle" immediately followed earlier intensity cycles whose peaks rivaled or surpassed the normalized intensities of discrete samples from well above and below the reversal interval; furthermore, the troughs indicate a much diminished dipole field at their nadir.
    Keywords: 126-792A; ARM, Intensity, per unit volume; Demagnetization level; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; IRM, Intensity, per unit volume; Joides Resolution; Leg126; North Pacific Ocean; NRM, Intensity after demagnetization; NRM, Median destructive field/ARM, Median destructive field ratio; NRM, Median destructive field/IRM, Median destructive field ratio; Ocean Drilling Program; ODP; Sample code/label; Type; Virtual geomagnetic pole latitude; Virtual geomagnetic pole longitude
    Type: Dataset
    Format: text/tab-separated-values, 188 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    (Appendix B) Chemical composition of the tephra layers of ODP Site 126-792 and 126-793 (1992)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 126-792A; Alkali; Alkali, standard deviation; Aluminium oxide; Aluminium oxide, standard deviation; Calcium oxide; Calcium oxide, standard deviation; Chromium(III) oxide; Chromium(III) oxide, standard deviation; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Electron microprobe (EMP); Elements, total; Iron oxide, FeO; Iron oxide, FeO, standard deviation; Joides Resolution; Leg126; Magnesium oxide; Magnesium oxide, standard deviation; Manganese oxide; Manganese oxide, standard deviation; Nickel oxide; Nickel oxide, standard deviation; North Pacific Ocean; Ocean Drilling Program; ODP; Potassium oxide; Potassium oxide, standard deviation; Sample code/label; Sample comment; Silicon dioxide; Silicon dioxide, standard deviation; Sodium oxide; Sodium oxide, standard deviation; Standard deviation; Titanium dioxide; Titanium dioxide, standard deviation; Vanadium, standard deviation; Vanadium oxide
    Type: Dataset
    Format: text/tab-separated-values, 9214 data points
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  • 4
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    (Table 3) Petrographic characteristics of tephra layers from the Izu-Bonin Forearc ODP sites (1992)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 126-792A; 126-792B; 126-792C; 126-792D; 126-792E; 126-793A; Biotite; Clinopyroxene; Comment; Comment 2 (continued); DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Grain size, maximum; Grain size description; Hornblende; Joides Resolution; Leg126; Lithic grains; Lithology/composition/facies; Magnetite; Minerals; North Pacific Ocean; Ocean Drilling Program; ODP; Opaque minerals; Orthopyroxene; Plagioclase; Refractive index; Sample code/label; Thickness; Volcanic glass
    Type: Dataset
    Format: text/tab-separated-values, 2075 data points
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  • 5
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    (Appendix A) Grain size analyses of tephra layers of ODP Site 126-792 and 126-793 (1992)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 126-792A; 126-792B; 126-792E; 126-793A; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Grain size, mean; Joides Resolution; Kurtosis; Leg126; Mean, standard deviation; Median, grain size; North Pacific Ocean; Ocean Drilling Program; ODP; Sample code/label; Size fraction 〈 1.75 phi; Size fraction 0.037-0.032 mm, 4.75-5.00 phi; Size fraction 0.044-0.037 mm, 4.50-4.75 phi; Size fraction 0.053-0.044 mm, 4.25-4.50 phi; Size fraction 0.063-0.053 mm, 4.00-4.25 phi; Size fraction 0.074-0.063 mm, 3.75-4.00 phi; Size fraction 0.088-0.074 mm, 3.50-3.75 phi; Size fraction 0.105-0.088 mm, 3.25-3.50 phi; Size fraction 0.125-0.105 mm, 3.00-3.25 phi; Size fraction 0.149-0.125 mm, 2.75-3.00 phi; Size fraction 0.210-0.177 mm, 2.25-2.50 phi; Size fraction 0.250-0.210 mm, 2.00-2.25 phi; Size fraction 0.297-0.250 mm, 1.75-2.00 phi; Size fraction 2.5-2.75 phi; Size fraction 5.0-6.0 phi; Size fraction 6.0-7.0 phi; Skewness
    Type: Dataset
    Format: text/tab-separated-values, 1856 data points
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  • 6
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    (Table 1) Paleomagnetic of ODP Leg 126 sites (1992)
    PANGAEA
    In:  Supplement to: Koyama, Masato; Cisowski, Stanley M; Pezard, Philippe A (1992): Paleomagnetic evidence for northward drift and clockwise rotation of the Izu-Bonin Forearc since the Early Oligocene. In: Taylor, B; Fujioka, K; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 126, 353-370, https://doi.org/10.2973/odp.proc.sr.126.143.1992
    Details
    Publication Date: 2024-01-09
    Description: A paleomagnetic study was made on the deep-marine sediments and volcanic rocks drilled by Ocean Drilling Program Leg 126 in the Izu-Bonin forearc region (Sites 787, 792, and 793). This study evaluates the sense and amount of the tectonic drift and rotation associated with the evolution of the Philippine Sea Plate and the Izu-Bonin Arc. Alternating-field and thermal demagnetization experiments show that most of the samples have stable remanence and are suitable for paleomagnetic studies. Paleomagnetic declinations were recovered by two methods of core orientation, one of which uses a secondary viscous magnetization vector of each specimen as an orientation standard, and the other of which is based on the data of downhole microresistivity measurement obtained by using a formation microscanner. Oligocene to early Miocene samples show 10° to 14° shallower paleolatitudes than those of the present. Middle Miocene to early Oligocene samples show progressive clockwise deflections (up to ~80°) in declination with time. These results suggest large northward drift and clockwise rotation of the Izu-Bonin forearc region since early Oligocene time. Considering previous paleomagnetic results from the other regions in the Philippine Sea, this motion may reflect large clockwise rotation of the whole Philippine Sea Plate over the past 40 m.y.
    Keywords: 126-787B; 126-792E; 126-793B; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Joides Resolution; Leg126; Median demagnetizing field; North Pacific Ocean; NRM, Declination; NRM, Inclination; NRM, Intensity; Ocean Drilling Program; ODP; Sample code/label
    Type: Dataset
    Format: text/tab-separated-values, 1186 data points
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  • 7
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    Petrology and geochemistry of the Izu-Bonin Forearc tephras (1992)
    PANGAEA
    In:  Supplement to: Fujioka, Kantaro; Matsuo, Yoshiko; Nishimura, Akira; Koyama, Masato; Rodolfo, Kelvin S (1992): Tephras of the Izu-Bonin Forearc (Sites 787, 792, and 793). In: Taylor, B; Fujioka, K.; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 126, 47-74, https://doi.org/10.2973/odp.proc.sr.126.117.1992
    Details
    Publication Date: 2024-01-09
    Description: Numerous marine tephra layers cored at Sites 792 and 793 in the Izu-Bonin forearc region offer additional information about the timing and spatial characteristics of arc volcanism and the evolution of island arcs. Explosive volcanism along the Izu-Bonin Arc, with maxima just before rifting of the arc at ~40 and 5-0 Ma, produced black and white tephras of variable grain sizes and chemical compositions. Most of the tephras belong chemically to low-K and low-alkali tholeiitic rock series with a few tephra of the high-K and alkalic rock series. Most of the tephras (low-K series) were derived from the Izu-Bonin Arc, although a few were produced far to the west of the Izu-Bonin Arc (e.g., from the Ryukyu Arc). Black tephras may have come from nearby sources, such as Aogashima, Sumisu, and Torishima islands. The high-K series of tephras, within the sediments younger than 3 Ma, may reflect thickening of the island-arc crust.
    Keywords: 126-792A; 126-792B; 126-792C; 126-792D; 126-792E; 126-793A; DRILL; Drilling/drill rig; Joides Resolution; Leg126; North Pacific Ocean; Ocean Drilling Program; ODP
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 8
    Electronic Resource
    Electronic Resource
    In Situ Observation of Phase Separation of a Barium Borate Melt in a Stable Immiscibility Region under Microgravity (1997)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 80 (1997), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The precipitation of droplets was directly observed on a BaO–B2O3 melt in a drop shaft experiment. This is the first time that precipitation of droplets has been observed in a 4.5 s drop test. The melt film of 4BaOz96B2O3 (mol%) held on a platinum wire loop was heated above the critical tem-perature to produce uniformity and was cooled down to the phase separation temperature range. Phase separation of the melt was observed directly with a video camera. The IR image of the melt was simultaneously detected with a CCD array and was converted into a two-dimensional thermograph.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.1997.tb03135.x
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    Paper (German National Licenses)
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