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  • 1
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    Unknown
    Chemical composition of manganese deposits (Birnessite) from Scotland (1956)
    PANGAEA
    In:  Supplement to: Jones, L H P; Milne, Angela A (1956): Birnessite, a new manganese oxide mineral from Aberdeenshire, Scotland. Mineralogical Magazine, 31(235), 283-288, https://doi.org/10.1180/minmag.1956.031.235.01
    Details
    Publication Date: 2023-08-28
    Description: A manganese pan near Birness contains grains of an optically uniaxial negative mineral near (Na0.7Ca0.3)Mn7O14·2·8H2O, giving an X-ray powder pattern similar to that of synthetic materials described as 'manganous manganite' and delta-MnO2. Material giving a similar pattern has been described from a natural occurrence in Canada, but no mineral name was assigned; the name birnessite is now proposed. The mineral is probably formed by air-oxidation of manganous oxides under alkaline conditions.
    Keywords: Aluminium oxide; Birness_J; Calcium oxide; Deposit type; DEPTH, sediment/rock; Description; Elevation of event; Iron oxide, Fe2O3; Latitude of event; Longitude of event; Manganese dioxide; Manganese oxide; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Sample ID; Scotland; Sediment type; Silicon dioxide; Sodium oxide; Titanium dioxide; Water in rock
    Type: Dataset
    Format: text/tab-separated-values, 14 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 2
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    Unknown
    Description of manganese deposits collected by RV Spencer F. Baird during the Trans-Pacific expedition in the Western Pacific in 1953 (1956)
    PANGAEA
    In:  Supplement to: Kuno, Hisashi; Fisher, Robert L; Nasu, Noriyuki (1956): Rock fragments and pebbles dredged near Jimmu Seamount, northwestern Pacific. Deep Sea Research, 3(2), 126-133, https://doi.org/10.1016/0146-6313(56)90090-9
    Details
    Publication Date: 2023-08-28
    Description: Fifty-five rock fragments and pebbles were dredged at 2,550-2,800 fathoms (4,650-5,100 metres) near Jimmu Seamount, 700 miles southeast of Kamchatka. Tuffaceous shale, andesitic and dacitic tuff, pyroxene-hornblende dacite-pumice, and augite-hypersthene andesite are the most abundant rock types. Minor constituents in the haul include augite-pigeonite basalt, augite-olivine basalt, olivine dolerite, quartz syenite porphyry, metabasalt, sandstone, and chert. Petrographic and chemical analyses indicate closer affinities with Kuril Islands and Kamchatka volcanic rocks than with Cenozoic Japanese or Pacific Basin types. Probably these rocks were dropped by Pleistocene icebergs carried south and east by ocean currents.
    Keywords: Date/Time of event; Deposit type; DEPTH, sediment/rock; Description; Dredge; DRG; Elevation of event; Latitude of event; Longitude of event; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Position; Quantity of deposit; Sample ID; Sediment type; Size; Spencer F. Baird; Substrate type; TRAN_JG; TRANSPAC; Trans-Pacific; Uniform resource locator/link to image; Western Pacific
    Type: Dataset
    Format: text/tab-separated-values, 9 data points
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
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