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  • 1
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    (Table 3) Chert geochemical compositions at DSDP Hole 63-471
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 63-471; Aluminium oxide; Aluminium oxide, standard deviation; Calcium oxide; Calcium oxide, standard deviation; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Electron microprobe (EMP); Glomar Challenger; Iron oxide, FeO; Iron oxide, FeO, standard deviation; Leg63; Magnesium oxide; Magnesium oxide, standard deviation; Manganese oxide; Manganese oxide, standard deviation; North Pacific/FAN; Potassium oxide; Potassium oxide, standard deviation; Replicates; Sample code/label; Silicon dioxide; Silicon dioxide, standard deviation; Sodium oxide; Sodium oxide, standard deviation; Standard deviation; Titanium dioxide; Total
    Type: Dataset
    Format: text/tab-separated-values, 55 data points
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  • 2
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    (Table 1) Massive sulfide deposit sample identification at DSDP Hole 63-471
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    Publication Date: 2023-06-27
    Keywords: 63-471; Deep Sea Drilling Project; Description; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Glomar Challenger; Leg63; North Pacific/FAN; Sample code/label
    Type: Dataset
    Format: text/tab-separated-values, 18 data points
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  • 3
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    (Table 5) Chlorite and biotite-phlogopite geochemical compositions at DSDP Hole 63-471
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    Publication Date: 2023-06-27
    Keywords: 63-471; Aluminium oxide; Aluminium oxide, standard deviation; Calcium oxide; Calcium oxide, standard deviation; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Electron microprobe (EMP); Glomar Challenger; Iron oxide, FeO; Iron oxide, FeO, standard deviation; Leg63; Magnesium oxide; Magnesium oxide, standard deviation; Manganese oxide; Manganese oxide, standard deviation; Mineral name; North Pacific/FAN; Potassium oxide; Potassium oxide, standard deviation; Replicates; Sample code/label; Silicon dioxide; Silicon dioxide, standard deviation; Sodium oxide; Sodium oxide, standard deviation; Standard deviation; Titanium dioxide; Titanium dioxide, standard deviation; Total
    Type: Dataset
    Format: text/tab-separated-values, 92 data points
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  • 4
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    (Table 6) Different minerals geochemical compositions at DSDP Hole 63-471
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    Publication Date: 2023-06-27
    Keywords: 63-471; Aluminium oxide; Aluminium oxide, standard deviation; Calcium oxide; Calcium oxide, standard deviation; Deep Sea Drilling Project; Description; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Electron microprobe (EMP); Glomar Challenger; Iron oxide, FeO; Iron oxide, FeO, standard deviation; Leg63; Magnesium oxide; Magnesium oxide, standard deviation; Manganese oxide; Manganese oxide, standard deviation; North Pacific/FAN; Potassium oxide; Potassium oxide, standard deviation; Replicates; Sample code/label; Sample ID; Silicon dioxide; Silicon dioxide, standard deviation; Sodium oxide; Sodium oxide, standard deviation; Standard deviation; Titanium dioxide; Titanium dioxide, standard deviation; Total
    Type: Dataset
    Format: text/tab-separated-values, 91 data points
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  • 5
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    (Table 4) Calcite geochemical compositions at DSDP Hole 63-471 (1981)
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    Publication Date: 2023-08-28
    Description: The sulfide deposit at Site 471 occurs between overlying pelagic sediment and underlying basalt. The deposit is vertically zoned and consists, from top to bottom, of the following mineral assemblages: (1) pyrite, chalcopyrite, and Zn-sulfide in chert and calcite gangue (~ 35 cm thick); (2) a 5-cm-thick metalliferous sediment layer and (3) a 4-cm-thick chert layer. The calcite gangue appears at a later stage than chert gangue in the sequence of deposition, also filling in voids and fractures. The manganese content of calcite is particularly high and varies systematically, reaching a maximum at the top of the massive sulfide portion of the deposit.
    Keywords: 63-471; Aluminium oxide; Aluminium oxide, standard deviation; Calcium oxide; Calcium oxide, standard deviation; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Electron microprobe (EMP); Glomar Challenger; Iron oxide, FeO; Iron oxide, FeO, standard deviation; Leg63; Magnesium oxide; Magnesium oxide, standard deviation; Manganese oxide; Manganese oxide, standard deviation; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; North Pacific/FAN; Potassium oxide; Potassium oxide, standard deviation; Replicates; Sample code/label; Silicon dioxide; Sodium oxide; Sodium oxide, standard deviation; Standard deviation; Titanium dioxide; Total
    Type: Dataset
    Format: text/tab-separated-values, 102 data points
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  • 6
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    Chemistry of the massive sulfide deposit at DSDP Hole 63-471 (1981)
    PANGAEA
    In:  Supplement to: Devine, Joseph D; Leinen, Margaret W (1981): Chemistry of the massive sulfide deposit Cored at Site 471. In: Yeats, RS; Haq, BU; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 63, 679-686, https://doi.org/10.2973/dsdp.proc.63.124.1981
    Details
    Publication Date: 2023-08-28
    Description: We report here chemical analyses of sulfide and other minerals occurring in the massive sulfide deposit cored at Site 471. Details of the mineralogy and inferred paragenesis of the deposit will be reported elsewhere. The sulfide deposit at Site 471 occurs between overlying pelagic sediment and underlying basalt. The deposit is vertically zoned and consists, from top to bottom, of the following mineral assemblages: (1) pyrite, chalcopyrite, and Zn-sulfide in chert and calcite gangue (about 35 cm thick); (2) a 5-cm-thick metalliferous sediment layer described in detail by Leinen (this volume); and (3) a 4-cm-thick chert layer. The overlying sediment is a calcareous silty claystone that contains middle Miocene coccoliths (Bukry, this volume). The underlying basalt has been extensively chloritized and veined with calcite. In places feldspars are albitized, and calcite occurs as pseudomorphs after olivine. Relict textures suggest that the basalt grades into diabase and gabbro with increasing depth. Neither stock work nor disseminated sulfides was observed in the altered rocks.
    Keywords: 63-471; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg63; North Pacific/FAN
    Type: Dataset
    Format: application/zip, 5 datasets
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  • 7
    Electronic Resource
    Electronic Resource
    Late Cretaceous and paroxysmal Cretaceous/Tertiary extinctions (1987)
    [s.l.] : Nature Publishing Group
    Nature 326 (1987), S. 143-149 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The various geological signatures at Cretaceous/ Tertiary time including iridium and other associated elements, microspherules, and shock deformation features are compatible with the suggestion that the transition is marked by a period of intense volcanism. The volatile emissions from this ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/326143a0
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    The 1783 Lakagigar eruption in Iceland: geochemistry, CO2 and sulfur degassing (1991)
    Springer
    Contributions to mineralogy and petrology 107 (1991), S. 435-447 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract About 12.3 km3 of basaltic magma were erupted from the Lakagigar fissure in Iceland in 1783, which may have been derived from the high-level reservoir of Grimsvotn central volcano, by lateral flow within the rifted crust. We have studied the petrology of quenched, glassy tephra from sections through pyroclastic cones along the fissure. The chemical composition of matrix glass of the 1783 tephra is heterogeneous and ranges from olivine tholeiite to Fe−Ti rich basalt, but the most common magma erupted is quartz tholeiite (Mg#43.6 to 37.2). The tephra are characterized by low crystal content (5 to 9 vol%). Glass inclusions trapped in plagioclase and Fo86 to Fo75 olivine phenocrysts show a large range of compositions, from primitive olivine tholeiite (Mg#64.3), quartz tholeiite (Mg#43–37), to Fe−Ti basalts (Mg#33.5) which represent the most differentiated liquids and are trapped as rare melt inclusions in clinopyroxene. Both matrix glass and melt inclusion data indicate a chemically heterogeneous magma reservoir, with quartz tholeiite dominant. LREE-depleted olivine-tholeiite melt-inclusions in Mg-rich olivine and anorthitic-plagioclase phenocrysts may represent primitive magma batches ascending into the reservoir at the time of the eruption. Vesicularity of matrix glasses correlates with differentiation, ranging from 10 to 60 vol.% in evolved quartz-tholeiite glasses, whereas olivine-tholeiite glasses contain less than 10 vol.% vesicles. FTIR analyses of olivine-tholeiite melt-inclusions indicate concentrations of 0.47 wt% H2O and 430 to 510 ppm for CO2. Chlorine in glass inclusions and matrix glasses increases from 50 ppm in primitive tholeiite to 230 ppm in Fe−Ti basalts, without clear evidence of degassing. Melt inclusion analyses show that sulfur varies from 915 ppm to 1970 ppm, as total FeO* increases from 9 to 13.5 wt%. Sulfur degassing correlates both with vesicularity and magma composition. Thus sulfur in matrix glasses decreases from 1490 ppm to 500 ppm, as Mg # decreases from 47 to 37 and vesicularity of the magma strongly increases. These results indicate loss of at least 75% of sulfur during the eruption. The correlation of low sulfur content in matrix glasses with high vesicularity is regarded as evidence of the control of a major exsolving volatile phase on the degassing efficiency of the magma. Our model is consistent a quasi-permanent CO2 flux through the shallow-level magmatic reservoir of Grimsvotn. Following magma withdrawal from the reservoir and during eruption from the Lakagigar fissure, sulfur degassing was controlled by inherent CO2-induced vesicularity of the magma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00310678
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  • 9
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    Geochemistry and geochronology of Grenada and Union islands, Lesser Antilles: The case for mixing between two magma series generated from distinct sources (2017)
    Geological Society of America
    Details
    Publication Date: 2017-07-27
    Electronic ISSN: 1553-040X
    Topics: Geosciences
    Published by Geological Society of America
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  • 10
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    Petrogenesis of the basalt-andesite-dacite association of Grenada, Lesser Antilles island arc, revisited (1995)
    Elsevier
    Details
    Publication Date: 1995-12-01
    Print ISSN: 0377-0273
    Electronic ISSN: 1872-6097
    Topics: Geosciences
    Published by Elsevier
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