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  • 1990-1994  (10)
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Keywords
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Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Oceanic crust production and climate during the last 100 Myr (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Terra nova 6 (1994), S. 0 
    Details
    ISSN: 1365-3121
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: In order to evaluate the possible influence of oceanic crust production on climatic changes during the past 100Myr variations in total oceanic crust for this period including production at mid-ocean ridges, oceanic plateaus, and back-arc basins were calculated using the most recent and accurate time-scales. The rates presented here differ from those of Larson (1991a, b) on Cenozoic fluctuations and show that (1) maximum production values occurred during the Cenomanian, Palaeocene, and late Oligocene-early Miocene and (2) minimum values occurred in Campanian-Maastrichtian, late Eocene, and middle Miocene. Significantly, variations of oceanic crust production correspond with variations in the δ18O of deep-water benthic foraminifera: maximum values of oceanic crust production correspond with minimum values of δ18O, and minimum production values with maximum values of δ18O. This latter synchronism suggests that changes in land-sea relationships and atmospheric CO2 related to major fluctuations in oceanic crust production were the main cause of mid-Cretaceous warming and Late Cretaceous cooling, and of climatic quasi-cycles having a periodicity of 33–38 million years over the last 100 Myr. This is the first report showing variations of ocean crust production synchronized with the Cenozoic climate changes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3121.1994.tb00510.x
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Oceanic crust production and climate during the last 100 Myr (1994)
    Wiley
    Details
    Publication Date: 1994-07-01
    Print ISSN: 0954-4879
    Electronic ISSN: 1365-3121
    Topics: Geosciences
    Published by Wiley
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    PAPER CURRENT
  • 3
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    Geochemistry and structural formulas of heavy minerals from sands and sandstones of ODP Leg 126 samples (1992)
    PANGAEA
    In:  Supplement to: Fujioka, Kantaro; Saito, Saneatsu (1992): Composition of heavy minerals from sands and sandstones of 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, 155-169, https://doi.org/10.2973/odp.proc.sr.126.125.1992
    Details
    Publication Date: 2024-01-09
    Description: Lower Oligocene to Pleistocene volcaniclastic sands and sandstones recovered around the Izu-Bonin Arc during Ocean Drilling Program Leg 126 were derived entirely from Izu-Bonin Arc volcanism. Individual grains consist of volcanic glass, pumice, scoria, basaltic or andesitic fragments, plagioclase, pyroxene, and minor olivine and hornblende. In Pliocene-Pleistocene samples plagioclase and heavy minerals in the volcaniclastic sands and sandstones are present in the following abundances: plagioclase 〉 orthopyroxene 〉 clinopyroxene 〉 pigeonite 〉 olivine. In contrast, plagioclase and heavy minerals found in Oligocene-Miocene samples occur in the following order: plagioclase 〉 clinopyroxene 〉 orthopyroxene 〉 hornblende. The low concentration of Al, Ti, and Cr in calcium-rich clinopyroxenes in Oligocene to Holocene sediments suggests that the sources of the volcaniclastic detritus were nonalkalic igneous rocks. There are, however, some distinctive differences in the chemical composition of pyroxene between the Pliocene-Pleistocene and Oligocene-Miocene volcaniclastic sands and sandstones. Orthopyroxene belongs to the hypersthene-ferrohypersthene series (Fe-rich) in Pliocene-Pleistocene sediments, and the bronzitehypersthene series (Mg-rich) in Oligocene-Miocene sediments. Clinopyroxene is characterized by augite and pigeonite in Pliocene-Pleistocene sediments, and by the diopside-augite series in Oligocene-Miocene sediments. Mineral assemblages and mineral chemistry of the volcaniclastic sands and sandstones reflect those of the volcanic source rocks. Therefore, the observed changes in mineralogy record the historical change in volcanism of the Izu-Bonin Arc. The mineralogy is consistent with the geochemistry of the volcaniclastic sands and sandstones and the geochemistry of forearc volcanic rocks of the Izu-Bonin Arc since the Oligocene.
    Keywords: 126-787A; 126-787B; 126-788C; 126-788D; 126-790B; 126-790C; 126-791A; 126-791B; 126-792A; 126-792B; 126-792E; 126-793A; 126-793B; DRILL; Drilling/drill rig; Joides Resolution; Leg126; North Pacific Ocean; Ocean Drilling Program; ODP; Philippine Sea
    Type: Dataset
    Format: application/zip, 7 datasets
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    DATA PANGAEA
  • 4
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    (Table 1) Chemical analyses of olivines in ODP Leg 126 backarc samples (1992)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 126-790B; 126-791A; Calcium; Calcium oxide; Calculated based on oxygen number; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Electron microprobe (EMP); Elements, total; Event label; Iron 2+ and 3+; Iron oxide, FeO; Joides Resolution; Leg126; Magnesium; Magnesium oxide; Manganese; Manganese oxide; Ocean Drilling Program; ODP; Philippine Sea; Sample code/label; Sample code/label 2; Silicon; Silicon dioxide; Sum
    Type: Dataset
    Format: text/tab-separated-values, 70 data points
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    DATA PANGAEA
  • 5
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    (Table 3) Chemical analyses of Ca-poor pyroxenes in ODP Leg 126 backarc samples (1992)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 126-788C; 126-788D; 126-790B; 126-790C; 126-791A; 126-791B; Aluminium; Aluminium oxide; Calcium; Calcium oxide; Calculated based on oxygen number; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Electron microprobe (EMP); Elements, total; Event label; Iron 2+ and 3+; Iron oxide, FeO; Joides Resolution; Leg126; Magnesium; Magnesium oxide; Manganese; Manganese oxide; Ocean Drilling Program; ODP; Philippine Sea; Sample code/label; Sample code/label 2; Silicon; Silicon dioxide; Sodium; Sodium oxide; Sum; Titanium; Titanium dioxide
    Type: Dataset
    Format: text/tab-separated-values, 540 data points
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    DATA PANGAEA
  • 6
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    (Table 5) Chemical analyses of Ca-rich pyroxenes in ODP Leg 126 backarc samples (1992)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 126-787A; 126-787B; 126-792B; 126-792E; 126-793A; 126-793B; Aluminium; Aluminium oxide; Calcium; Calcium oxide; Calculated based on oxygen number; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Electron microprobe (EMP); Elements, total; Event label; Iron 2+ and 3+; Iron oxide, FeO; Joides Resolution; Leg126; Magnesium; Magnesium oxide; Manganese; Manganese oxide; North Pacific Ocean; Ocean Drilling Program; ODP; Sample code/label; Sample code/label 2; Silicon; Silicon dioxide; Sodium; Sodium oxide; Sum; Titanium; Titanium dioxide
    Type: Dataset
    Format: text/tab-separated-values, 580 data points
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    DATA PANGAEA
  • 7
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    (Table 2) Chemical analyses of olivines in ODP Leg 126 forearc samples (1992)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 126-788C; 126-788D; 126-790B; 126-790C; 126-791A; Aluminium; Aluminium oxide; Calcium; Calcium oxide; Calculated based on oxygen number; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Electron microprobe (EMP); Elements, total; Event label; Iron 2+ and 3+; Iron oxide, FeO; Joides Resolution; Leg126; Magnesium; Magnesium oxide; Manganese; Manganese oxide; Ocean Drilling Program; ODP; Philippine Sea; Sample code/label; Sample code/label 2; Silicon; Silicon dioxide; Sodium; Sodium oxide; Sum; Titanium; Titanium dioxide
    Type: Dataset
    Format: text/tab-separated-values, 690 data points
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    DATA PANGAEA
  • 8
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    (Table 4) Chemical analyses of Ca-poor pyroxenes in ODP Leg 126 forearc samples (1992)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 126-787B; Calcium; Calcium oxide; Calculated based on oxygen number; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Electron microprobe (EMP); Elements, total; Iron 2+ and 3+; Iron oxide, FeO; Joides Resolution; Leg126; Magnesium; Magnesium oxide; Manganese; Manganese oxide; North Pacific Ocean; Ocean Drilling Program; ODP; Sample code/label; Sample code/label 2; Silicon; Silicon dioxide; Sum
    Type: Dataset
    Format: text/tab-separated-values, 28 data points
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    DATA PANGAEA
  • 9
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    (Table 6) Chemical analyses of Ca-rich pyroxenes in ODP Leg 126 forearc samples (1992)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 126-787A; 126-787B; 126-792A; 126-792B; 126-792E; 126-793A; 126-793B; Aluminium; Aluminium oxide; Calcium; Calcium oxide; Calculated based on oxygen number; Chromium; Chromium(III) oxide; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Electron microprobe (EMP); Elements, total; Event label; Iron 2+ and 3+; Iron oxide, FeO; Joides Resolution; Leg126; Magnesium; Magnesium oxide; Manganese; Manganese oxide; North Pacific Ocean; Ocean Drilling Program; ODP; Sample code/label; Sample code/label 2; Silicon; Silicon dioxide; Sodium; Sodium oxide; Sum; Titanium; Titanium dioxide
    Type: Dataset
    Format: text/tab-separated-values, 1342 data points
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    DATA PANGAEA
  • 10
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    (Table 7) Chemical analyses of hornblendes in ODP Hole 126-792E (1992)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 126-792E; Aluminium; Aluminium oxide; Calcium; Calcium oxide; Calculated based on oxygen number; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Electron microprobe (EMP); Elements, total; Iron 2+ and 3+; Iron oxide, FeO; Joides Resolution; Leg126; Magnesium; Magnesium oxide; Manganese; Manganese oxide; North Pacific Ocean; Ocean Drilling Program; ODP; Potassium; Potassium oxide; Sample code/label; Sample code/label 2; Silicon; Silicon dioxide; Sodium; Sodium oxide; Sum; Titanium; Titanium dioxide
    Type: Dataset
    Format: text/tab-separated-values, 88 data points
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    DATA PANGAEA
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