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  • Data  (4)
  • -; 64-474A; 64-475B; Anorthite; Clinopyroxene; Comment; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Event label; Forsterite; Glomar Challenger; Leg64; Liquid fraction; North Pacific/Gulf of California/BASIN; North Pacific/Gulf of California/SLOPE; Number; Olivine; Plagioclase; Sample code/label; Sample code/label 2; Spinel  (1)
  • 30-288; 30-288A; 30-289; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg30; South Pacific; South Pacific/PLATEAU  (1)
  • 30-289; Atomic absorption spectrometry (AAS); Calculated; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Glomar Challenger; Isotope ratio mass spectrometry; Leg30; Magnesium/Calcium ratio; Sample code/label; South Pacific/PLATEAU; Species; Strontium; Strontium/Calcium ratio; Strontium-87/Strontium-86 ratio; Strontium-87/Strontium-86 ratio, error  (1)
  • 70-506; 70-506B; 70-506C; 70-506G; 70-507B; 70-507D; 70-507F; 70-508B; 70-509B; 70-510; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg70; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; North Pacific; North Pacific/MOUND
  • AGE; D-Alloisoleucine; D-Alloisoleucine/L-Isoleucine ratio; DEPTH, sediment/rock; FGGE-Equator 79 - First GARP Global Experiment; GIK/IfG; GIK13519-2; Gravity corer (Kiel type); Institute for Geosciences, Christian Albrechts University, Kiel; L-Isoleucine; M51; Meteor (1964); Sierra Leone Rise; SL
  • PANGAEA  (4)
  • American Association for the Advancement of Science (AAAS)
  • American Geophysical Union
  • American Meteorological Society (AMS)
  • 1980-1984  (4)
  • 1925-1929
  • 1982  (4)
Collection
  • Data  (4)
Keywords
Publisher
  • PANGAEA  (4)
  • American Association for the Advancement of Science (AAAS)
  • American Geophysical Union
  • American Meteorological Society (AMS)
Years
  • 1980-1984  (4)
  • 1925-1929
Year
  • 1
    Publication Date: 2023-07-07
    Keywords: -; 64-474A; 64-475B; Anorthite; Clinopyroxene; Comment; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Event label; Forsterite; Glomar Challenger; Leg64; Liquid fraction; North Pacific/Gulf of California/BASIN; North Pacific/Gulf of California/SLOPE; Number; Olivine; Plagioclase; Sample code/label; Sample code/label 2; Spinel
    Type: Dataset
    Format: text/tab-separated-values, 220 data points
    Location Call Number Expected Availability
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  • 2
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    Unknown
    PANGAEA
    In:  Supplement to: Barrett, T J; Friedrichsen, Hans (1982): Elemental and isotopic compositions of some metalliferous and pelagic sediments from the Galapagos mounds area, DSDP Leg 70. Chemical Geology, 36(3-4), 275-298, https://doi.org/10.1016/0009-2541(82)90052-3
    Publication Date: 2023-08-28
    Description: Nontronite, the main metalliferous phase of the Galapagos mounds, occurs at a subsurface depth of ~2–20 m; Mn-oxide material is limited to the upper 2 m of these mounds. The nontronite forms intervals of up to a few metres thickness, consisting essentially of 100% nontronite granules, which alternate with intervals of normal pelagic sediment. The metalliferous phases represent essentially authigenic precipitates, apparently formed in the presence of upwelling basement-derived hydrothermal solutions which dissolved pre-existent pelagic sediment. Electron microprobe analyses of nontronite granules from different core samples indicate that: (1) there is little difference in major-element composition between nontronitic material from varying locations within the mounds; and (2) adjacent granules from a given sample have very similar compositions and are internally homogeneous. This indicates that the granules are composed of a single mineral of essentially constant composition, consistent with relatively uniform conditions of solution Eh and composition during nontronite formation. The Pb-isotopic composition of the nontronite and Mn-oxide sediments indicates that they were formed from solutions which contained variable proportions of basaltic Pb, introduced into pore waters by basement-derived solutions, and of normal-seawater Pb. However, the Sr-isotopic composition of these sediments is essentially indistinguishable from the value for modern seawater. On the basis of 18O/16O ratios, formation temperatures of ~20–30°C have been estimated for the nontronites. By comparison, temperatures of up to 11.5°C at 9 m depth have been directly measured within the mounds and heat flow data suggest present basement-sediment interface temperatures of 15–25°C.
    Keywords: 70-506; 70-506B; 70-506C; 70-506G; 70-507B; 70-507D; 70-507F; 70-508B; 70-509B; 70-510; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg70; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; North Pacific; North Pacific/MOUND
    Type: Dataset
    Format: application/zip, 7 datasets
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  • 3
    Publication Date: 2024-02-10
    Keywords: 30-289; Atomic absorption spectrometry (AAS); Calculated; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Glomar Challenger; Isotope ratio mass spectrometry; Leg30; Magnesium/Calcium ratio; Sample code/label; South Pacific/PLATEAU; Species; Strontium; Strontium/Calcium ratio; Strontium-87/Strontium-86 ratio; Strontium-87/Strontium-86 ratio, error
    Type: Dataset
    Format: text/tab-separated-values, 297 data points
    Location Call Number Expected Availability
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  • 4
    facet.materialart.
    Unknown
    PANGAEA
    In:  Supplement to: Elderfield, Henry; Gieskes, Joris M; Baker, Paul A; Oldfield, R K; Hawkesworth, Chris J; Miller, R (1982): 87Sr/88Sr and 18O/16O ratios, interstitial water chemistry and diagenesis in deep-sea carbonate sediments of the Ontong Java Plateau. Geochimica et Cosmochimica Acta, 46(11), 2259-2268, https://doi.org/10.1016/0016-7037(82)90199-5
    Publication Date: 2024-02-10
    Description: Interstitial waters and sediments from DSDP sites 288 and 289 contain information on the chemistry and diagenesis of carbonate in deep-sea sediments and on the role of volcanic matter alteration processes. Sr/Ca ratios are species dependent in unaltered foraminifera from site 289 and atom ratios (0.0012-0.0016) exceed those predicted by distribution coefficent data (~0.0004). During diagenesis Sr/Ca ratios of carbonates decrease and reach the theoretical distribution at a depth which is identical to the depth of Sr isotopic equilibration, where 87Sr/86Sr ratios of interstitial waters and carbonates converge. Mg/Ca ratios in the carbonates do not increase with depth as found in some other DSDP sites, possibly because of diagenetic re-equilibration with interstitial waters showing decreasing Mg(2+)/Ca(2+) ratios with depth due to Ca input and Mg removal by alteration of volcanic matter. Interstitial 18O/16O ratios increase with depth at site 289 to d18O = 0.67‰ (SMOW), reflecting carbonate recrystallization at elevated temperatures (〉/= 20°C), the first recorded evidence of this effect in interstitial waters. Interstitial Sr2+ concentrations reach high levels, up to 1 mM, chiefly because of carbonate recrystallization. However, 87Sr/86Sr ratios decrease from 0.7092 to less than 0.7078, lower than for contemporaneous sea water, showing that there is a volcanic input of strontium at depth. This volcanic component is recorded in the Sr isotopic composition of recrystallized calcites. Isotopic compositions of the unrecrystallized calcites suggests that the rate of increase of the 87Sr/86Sr ratio of sea water with time has been faster since 3 my ago than in the preceding 13 my.
    Keywords: 30-288; 30-288A; 30-289; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg30; South Pacific; South Pacific/PLATEAU
    Type: Dataset
    Format: application/zip, 6 datasets
    Location Call Number Expected Availability
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