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  • 134-828A; 134-829A; 134-831B; 134-832B; 134-833B; Age, 40K/40Ar Potassium-Argon; Age, dated; Age, dated standard deviation; Argon-40; Coral Sea; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Joides Resolution; Leg134; Ocean Drilling Program; ODP; Potassium; Rock type; Sample code/label  (1)
  • Basaltic  (1)
Collection
Keywords
  • 134-828A; 134-829A; 134-831B; 134-832B; 134-833B; Age, 40K/40Ar Potassium-Argon; Age, dated; Age, dated standard deviation; Argon-40; Coral Sea; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Joides Resolution; Leg134; Ocean Drilling Program; ODP; Potassium; Rock type; Sample code/label  (1)
  • Basaltic  (1)
  • Antarctica  (1)
  • Endogenous  (1)
  • Key words Lava dome  (1)
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  • 1
    facet.materialart.
    Unknown
    (Table 1) Age determination of ODP Leg 134 volcanic rocks (1994)
    PANGAEA
    In:  Supplement to: Rex, D C (1994): K-Ar Age determinations of samples from Leg 134. In: Green, HG; Collot, J-Y; Stokking, LB; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 134, 413-414, https://doi.org/10.2973/odp.proc.sr.134.021.1994
    Details
    Publication Date: 2024-01-09
    Description: The K-Ar ages from the basaltic rocks of Leg 134 range from Miocene to Holocene (Table 1). Samples were selected in consultation with shipboard scientists; choice of the material from the forearc sites was very limited and confined to clasts. There was a wider choice of material from the sill at Site 833 in the North Aoba Basin.
    Keywords: 134-828A; 134-829A; 134-831B; 134-832B; 134-833B; Age, 40K/40Ar Potassium-Argon; Age, dated; Age, dated standard deviation; Argon-40; Coral Sea; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Joides Resolution; Leg134; Ocean Drilling Program; ODP; Potassium; Rock type; Sample code/label
    Type: Dataset
    Format: text/tab-separated-values, 127 data points
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    DATA PANGAEA
  • 2
    Electronic Resource
    Electronic Resource
    Subaqueous, basaltic lava dome and carapace breccia on King George Island, South Shetland Islands, Antarctica (1998)
    Springer
    Bulletin of volcanology 59 (1998), S. 245-261 
    Details
    ISSN: 1432-0819
    Keywords: Key words Lava dome ; Endogenous ; Basaltic ; Submarine ; Rheology ; Antarctica
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  On King George Island during latest Oligocene/earliest Miocene time, submarine eruptions resulted in the emplacement of a small (ca. 500 m estimated original diameter) basalt lava dome at Low Head. The dome contains a central mass of columnar rock enveloped by fractured basalt and basalt breccia. The breccia is crystalline and is a joint-block deposit (lithic orthobreccia) interpreted as an unusually thick dome carapace breccia cogenetic with the columnar rock. It was formed in situ by a combination of intense dilation, fracturing and shattering caused by natural hydrofracturing during initial dome effusion and subsequent endogenous emplacement of further basalt melt, now preserved as the columnar rock. Muddy matrix with dispersed hyaloclastite and microfossils fills fractures and diffuse patches in part of the fractured basalt and breccia lithofacies. The sparse glass-rich clasts formed by cooling-contraction granulation during interaction between chilled basalt crust and surrounding water. Together with muddy sediment, they were injected into the dome by hydrofracturing, local steam fluidisation and likely explosive bulk interaction. The basalt lava was highly crystallised and degassed prior to extrusion. Together with a low effusion temperature and rapid convective heat loss in a submarine setting, these properties significantly affected the magma rheology (increased the viscosity and shear strength) and influenced the final dome-like form of the extrusion. Conversely, high heat retention was favoured by the degassed state of the magma (minimal undercooling), a thick breccia carapace and viscous shear heating, which helped to sustain magmatic (eruption) temperatures and enhanced the mobility of the flow.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004450050189
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