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  • 1
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    PANGAEA
    In:  Supplement to: Castillo, Paterno R; Batiza, Rodey; Stern, Robert J (1986): Petrology and geochemistry of Nauru Basin igneous complex: Large-volume, off-ridge eruptions of MORB-like basalt during the Cretaceous. In: Moberly, R; Schlanger, SO; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 89, 555-576, https://doi.org/10.2973/dsdp.proc.89.122.1986
    Publication Date: 2023-05-12
    Description: The 16 samples of Deep Sea Drilling Project (DSDP) Leg 89 basalts that we analyzed for whole rock major and trace elements and for mineralogic compositions are identical to some of the basalts recovered during Leg 61. Leg 89 samples are mostly olivine-plagioclase-clinopyroxene sparsely phyric basalts and exhibit a wide variety of textures. These basalts have lower TiO2 at a given Mg/(Mg+Fe2+)*100 than MORB (midocean ridge basalt). We recognize three major chemical types of basalts in the Nauru Basin. We believe that different degrees of partial melting, modified by fractional crystallization and possibly by magma mixing at shallow depths, can explain the chemical differences among the three groups. This petrogenetic model is consistent with the observed downhole chemical-chronostratigraphic relations of the samples. New 87Sr/86Sr and U3Nd/144Nd analyses of basalt samples from DSDP Site 462 indicate that the Nauru Basin igneous complex is within the Sr-Nd isotopic range of ocean island basalt. Thus the Nauru Basin igneous complex resembles MORB in many aspects of its chemistry, morphology, and secondary alteration patterns (Larson, Schlanger, et al., 1981), but not in its isotopic characteristics. If it were not for the unambiguous evidence that the Nauru Basin complex was erupted off-ridge, the complex could easily be interpreted as normal oceanic layer 2. For this reason, we speculate that the Nauru Basin igneous complex was produced in an oceanic riftlike environment when multiple, fast-propagating rifts were formed during the fast seafloor spreading episode in the Cretaceous.
    Keywords: Deep Sea Drilling Project; DSDP
    Type: Dataset
    Format: application/zip, 5 datasets
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  • 2
    Publication Date: 2023-06-27
    Keywords: 89-462; 89-462A; Barium; Cerium; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Event label; Glomar Challenger; Instrumental neutron activation analysis (INAA); Leg89; Lithology/composition/facies; Neodymium; Neodymium-143/Neodymium-144 ratio; Neodymium-143/Neodymium-144 ratio, error; North Pacific; North Pacific/BASIN; Rubidium; Rubidium-87/Strontium-86 ratio; Samarium; Samarium-147/Neodymium-144 ratio; Sample code/label; Strontium; Strontium-87/Strontium-86 ratio; Strontium-87/Strontium-86 ratio, error; ε-Neodymium (T)
    Type: Dataset
    Format: text/tab-separated-values, 40 data points
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  • 3
    Publication Date: 2023-06-27
    Keywords: 89-462; 89-462A; Albite; Aluminium oxide; Anorthite; Calcium oxide; Chromium; CIPW Norm; Cobalt; Deep Sea Drilling Project; Diopside; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Electron microprobe (EMP); Event label; Glomar Challenger; Hypersthene; Ilmenite; Instrumental neutron activation analysis (INAA); Iron oxide, Fe2O3; Iron oxide, FeO; Leg89; Lithologic unit/sequence; Magnesium number; Magnesium oxide; Magnetite; Manganese oxide; Nickel; North Pacific; North Pacific/BASIN; Olivine; Orthoclase; Potassium oxide; Quartz; Sample code/label; Silicon dioxide; Sodium oxide; Titanium dioxide
    Type: Dataset
    Format: text/tab-separated-values, 75 data points
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  • 4
    Publication Date: 2023-07-10
    Keywords: 89-462A; Albite; Aluminium; Aluminium oxide; Anorthite; Calcium; Calcium oxide; Calculated based on oxygen number; CIPW Norm; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Electron microprobe (EMP); Glomar Challenger; Iron 2+ and 3+; Iron oxide, FeO; Leg89; Lithologic unit/sequence; Magnesium; Magnesium oxide; North Pacific; Number of oxygens; Orthoclase; Potassium; Potassium oxide; Sample code/label; Sample comment; Silicon; Silicon dioxide; Sodium; Sodium oxide; Total
    Type: Dataset
    Format: text/tab-separated-values, 308 data points
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  • 5
    Publication Date: 2023-07-10
    Keywords: 89-462A; Aluminium oxide; Calcium oxide; Carbon dioxide; Cerium; Chromium; CIPW Norm; Cobalt; Deep Sea Drilling Project; Diopside; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Europium; Glomar Challenger; Hafnium; Hypersthene; Instrumental neutron activation analysis (INAA); Iron oxide, Fe2O3; Iron oxide, FeO; Lanthanum; Leg89; Lithologic unit/sequence; Lutetium; Magnesium number; Magnesium oxide; Manganese oxide; Minerals; North Pacific; Phosphorus pentoxide; Potassium oxide; Quartz; Samarium; Sample code/label; Scandium; Silicon dioxide; Sodium oxide; Tantalum; Terbium; Thorium; Titanium dioxide; Total; Water in rock; Wet chemistry; X-ray fluorescence (XRF); Ytterbium
    Type: Dataset
    Format: text/tab-separated-values, 560 data points
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  • 6
    Publication Date: 2023-07-10
    Keywords: 89-462A; Aluminium; Aluminium oxide; Calcium; Calcium oxide; Calculated based on oxygen number; Chromium; Chromium(III) oxide; CIPW Norm; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Electron microprobe (EMP); Enstatite; Ferrosilite; Glomar Challenger; Iron 2+ and 3+; Iron oxide, FeO; Leg89; Lithologic unit/sequence; Magnesium; Magnesium oxide; Manganese; Manganese oxide; Nickel; Nickel oxide; North Pacific; Number of oxygens; Potassium; Potassium oxide; Sample code/label; Sample comment; Silicon; Silicon dioxide; Sodium; Sodium oxide; Titanium; Titanium dioxide; Total; Wollastonite
    Type: Dataset
    Format: text/tab-separated-values, 570 data points
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  • 7
    Publication Date: 2023-11-23
    Description: During R/V T. Thompson cruise TT-192 around the the Mariana and Volcano Volcanic Arcs 60% of the dredge recoveries contained ferromanganese deposits. Substrate rocks consisted of intermediate to mafic volcanic rocks, volcaniclastic rocks, volcanic breccia, and minor limestone. Volcaniclastic rocks were dominantly sandstone but ranged from mudstone to conglomerate. Ferromanganese deposits occur in five ways: Yellow-brown to black ferromanganese encrustations on rocks; brown, grey, and black ferromanganese oxides cementing volcaniclastic sandstone; stratiform, stratabound Mn oxide rich layers that are pale to dark grey, rarely brownish-grey, with a submetallic luster; cobbles of dark grey submetallic, irregularly shaped masses of manganese (Mn nodules ?) and weatehered black cobbles rich in magnetite. A selection of these deposits was chemically analysed including major and minor elements, rare earth elements, and platinum-group elements. The chemistry determination was done by Induction Coupled Plasma analyses done by J. G. Crock, and K. Kennedy at the U.S. Geological Survey laboratories in Reston, Denver and Menlo Park respectively. Water and CO2 determinations were done by wet chemical techniques.
    Keywords: Aluminium; Arsenic; Barium; Cadmium; Calcium; Carbon dioxide; Cerium; Chromium; Cobalt; Copper; Deposit type; DEPTH, sediment/rock; DISTANCE; Dredge; DRG; Dysprosium; Elevation of event; Erbium; Europium; Event label; Gadolinium; Geochemistry; HalbachD36; Holmium; Identification; Induction-coupled plasma technique; Iron; Lanthanum; Latitude of event; Lead; Lithology/composition/facies; Longitude of event; Lutetium; Magnesium; Manganese; manganese micronodule; manganese nodule; Marianas; Molybdenum; Neodymium; Nickel; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; Pacific Ocean; Palladium; Phosphorus; Platinum; Potassium; Praseodymium; Rhodium; Samarium; Sample code/label; sediment; Silicon; Sodium; Strontium; Terbium; Thomas G. Thompson (1964); Thulium; Titanium; TT192; TT192-D11; TT192-D12; TT192-D13; TT192-D15; TT192-D20; TT192-D21; TT192-D27B; TT192-D28; TT192-D3; TT192-D33; TT192-D36; TT192-D37; TT192-D41; TT192-D42; TT192-D44; TT192-D51; TT192-D52; TT192-D54; TT192-D55; TT192-D56; TT192-D57; TT192-D58; TT192-D59; TT192-D71; TT192-D73; TT192-D8; Vanadium; Water in rock; Wet chemistry; Ytterbium; Yttrium; Zinc
    Type: Dataset
    Format: text/tab-separated-values, 1911 data points
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  • 8
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Three-quarters of the Earth's volcanic activity is submarine, located mostly along the mid-ocean ridges, with the remainder along intraoceanic arcs and hotspots at depths varying from greater than 4,000 m to near the sea surface. Most observations and sampling of submarine eruptions ...
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1440-1738
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Late Miocene (7–9 Ma) basaltic rocks from the Monbetsu-Kamishihoro graben in northeast Hokkaido have chemical affinities to certain back-arc basin basalts (referred to herein as Hokkaido BABB). Pb-, Nd- and Sr-isotopic compositions of the Hokkaido BABB and arc-type volcanic rocks (11–13 Ma and 4–4.5 Ma) from the nearby region indicate mixing between the depleted mantle and an EM II-like enriched component (e.g. subducted pelagic sediment) in the magma generation. At a given 87Sr/86Sr, Hokkaido BABB have slightly lower 143Nd/144Nd and slightly less radiogenic 206Pb/204Pb compared with associated arc-type lavas, but both these suites are difficult to distinguish solely on the basis of isotopic compositions. These isotopic data indicate that while generation of the Hokkaido BABB involves smaller amounts of the EM II-like enriched component than do associated arc lavas, Hokkaido BABB are isotopically distinct from basalts produced at normal back-arc basin spreading centers. Instead, northeast Hokkaido BABB are more similar to basalts erupted during the initial rifting stage of back-arc basins. The Monbetsu-Kamishihoro graben may have developed in association with extension that formed the Kurile Basin, suggesting that opening of the basin continued until late Miocene (7–9 Ma).
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Oxford UK : Blackwell Science Pty
    The @island arc 7 (1998), S. 0 
    ISSN: 1440-1738
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Type of Medium: Electronic Resource
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