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  • 1990-1994  (23)
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  • 1
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    Unknown
    Observation of manganese deposits on Kaikata Seamount, Izu-Ogasawara (Bonin) Arc by the Shikai 2000 submersible (1992)
    PANGAEA
    In:  Supplement to: Usui, Akira; Nishimura, Akira (1992): Submersible observations of hydrothermal manganese deposits on the Kaikata Seamount, Izu-Ogasawara (Bonin) Arc. Marine Geology, 106(3-4), 203-216, https://doi.org/10.1016/0025-3227(92)90130-A
    Details
    Publication Date: 2023-08-28
    Description: During Dive 408 of Shinkai 2000 on the flank of the Kaikata Seamount located on the volcanic front of the Izu-Ogasawara (Bonin) Arc, possibly recent hydrothermal manganese deposits were observed on sandy volcanic sediments at water depths of between 800 and 1200 m. The deposits cover almost the entire surface sediment across the manganese belt on the northwestern flank on the seamount on a scale of kilometers. The occurrence of the deposits, seafloor morphology and temperature of the sediments, together with previous shipboard results, lead to a possible model for the formation of the manganese deposits: A low-temperature hydrothermal solution ascends through fractures or faults in the volcanic substrate into permeable volcanic sands and precipitates manganate minerals which cement several centimeters of surface sand as hardpan. More intense and probably intermittent discharge of hydrothermal solution follows and forms many typical ridge-like vents and mounds on the seafloor. Subsequently, pure dense manganate layers developed beneath the semi-consolidated volcanic sandstone and act as a cap to the ascending fluids. The proposed mechanism may be the dominant type of low-temperature hydrothermal mineralization in submarine island-arc volcanoes and rifts. Similar hydrothermal manganese deopsits most probably occur in other active areas of the modern seafloors and in inactive island arcs.
    Keywords: Date/Time of event; Deposit type; DEPTH, sediment/rock; Description; DV408/St_1; DV408/St_2; DV408/St_3; DV408/St_4; Elevation of event; Event label; Kaikata Seamount, Pacific Ocean; Latitude of event; Longitude of event; Na8906; Natsushima; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Position; Quantity of deposit; S2000; Sample ID; Sediment type; Shinkai2000_408-S1; Shinkai2000_408-S2; Shinkai2000_408-S3; Shinkai2000_408-S4; Shinkai2000_DV408; Size; Submersible Shinkai 2000; Substrate type; Uniform resource locator/link to image
    Type: Dataset
    Format: text/tab-separated-values, 32 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Chemistry of Pliocene-Pleistocene pumice from the Izu-Bonin Arc (1992)
    PANGAEA
    In:  Supplement to: Nishimura, Akira; Rodolfo, Kelvin S; Koizumi, Akiko; Gill, James B; Fujioka, Kantaro (1992): Episodic deposition of Pliocene-Pleistocene pumice from the Izu-Bonin Arc, Leg 126. In: Taylor, B; Fujioka, K; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 126, 3-21, https://doi.org/10.2973/odp.proc.sr.126.115.1992
    Details
    Publication Date: 2024-01-09
    Description: Thick pumice deposits were found in the cored sequences of forearc, arc, and backarc sites of Leg 126 in the Izu-Bonin Arc. These deposits, composed of fragmental rhyolite pumice with the chemical composition of low-alkali tholeiites, are products of arc volcanism. Pumice deposits constitute more than half of the thickness of the sediment fill of the Sumisu Rift, a backarc rift of the Izu-Bonin Arc. They comprise five thick pumiceous beds separated by thin hemipelagic units; as such, they record four major episodes or pulses of explosive, rhyolitic volcanism during the last 0.15 Ma, separated by quiescent intervals that each lasted about 30-60 k.y. The thick pumiceous beds were deposited in the rift mainly by sediment gravity flows during and immediately after the eruption of arc volcanos, which were probably submarine. Initiation of rifting was also preceded in the Pliocene by submarine rhyolitic volcanism, as seen in samples from the top of the eastern rift flank. Thick pumice beds correlative with those in the backarc also occur in the forearc basin to the east.
    Keywords: 125-785A; 126-788C; 126-790B; 126-790C; 126-791A; 126-793A; DRILL; Drilling/drill rig; Joides Resolution; Leg125; Leg126; North Pacific Ocean; Ocean Drilling Program; ODP; Philippine Sea
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    (Table 1) Volcanic ash layers at ODP Site 126-790 (1992)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: -; 126-790B; 126-790C; Description; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Joides Resolution; Layer description; Leg126; Number; Ocean Drilling Program; ODP; Philippine Sea; Sample code/label
    Type: Dataset
    Format: text/tab-separated-values, 507 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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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
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    (Table 3) Grain-size analyses for ODP Leg 126 samples (1992)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 126-788C; 126-790; 126-791A; COMPCORE; Composite Core; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Joides Resolution; Leg126; Ocean Drilling Program; ODP; Philippine Sea; 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 0.177-0.149 mm, 2.50-2.75 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 5.0-6.0 phi; Size fraction 6.0-7.0 phi
    Type: Dataset
    Format: text/tab-separated-values, 1054 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    (Appendix) Geochemistry of ODP Leg 126 tephra samples (1992)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 126-788C; 126-790A; 126-790C; 126-791A; 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; Event label; 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; Ocean Drilling Program; ODP; Philippine Sea; 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, 18190 data points
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  • 7
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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
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    (Appendix) Geochemistry of glass shards of ODP Leg 126 samples (1992)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 126-788; 126-790; 126-791A; 126-791B; Aluminium oxide; Aluminium oxide, standard deviation; Calcium oxide; Calcium oxide, standard deviation; Chlorine; Chlorine, standard deviation; Chromium(III) oxide; Chromium(III) oxide, standard deviation; COMPCORE; Composite Core; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; 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; Ocean Drilling Program; ODP; Philippine Sea; Phosphorus pentoxide; Phosphorus pentoxide, standard deviation; Potassium oxide; Potassium oxide, standard deviation; Rock type; Sample amount; Sample code/label; SEM coupled with EDS; Silicon dioxide; Silicon dioxide, standard deviation; Sodium oxide; Sodium oxide, standard deviation; Sulfate; Sulfate, standard deviation; Titanium dioxide; Titanium dioxide, standard deviation; Vanadium oxide; Vanadium oxide, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 5532 data points
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  • 9
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    (Table 2) Carbonate-free chemical composition of pelagic and hemipelagic sediments of ODP Leg 126 sites (1992)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 126-787B; 126-788D; 126-790A; 126-790B; 126-790C; 126-791A; 126-791B; 126-792A; 126-792B; 126-792E; 126-793A; 126-793B; Aluminium oxide; Atomic absorption spectrometry (AAS); Calcium oxide; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Iron oxide, Fe2O3; Joides Resolution; Leg126; Magnesium oxide; Manganese oxide; North Pacific Ocean; Ocean Drilling Program; ODP; Philippine Sea; Potassium oxide; Sample code/label; Silicon dioxide; Sodium oxide; Titanium dioxide; Total
    Type: Dataset
    Format: text/tab-separated-values, 1133 data points
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  • 10
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    (Table 5) Sedimentation rates of ODP Leg 126 sites (1992)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 126-787; 126-788; 126-790; 126-791; 126-792; 126-793; Calculated; COMPCORE; Composite Core; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Event label; Joides Resolution; Leg126; Lithologic unit/sequence; North Pacific Ocean; Ocean Drilling Program; ODP; Philippine Sea; Sedimentation rate
    Type: Dataset
    Format: text/tab-separated-values, 106 data points
    Location Call Number Limitation Availability
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