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Parson, Lindsey M; Viereck-Götte, Lothar; Love, Dave; Gibson, Ian L; Morton, A W; Hertogen, Jan GH (1989): The petrology of the lower series volcanics of ODP Hole 104-642E [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.737402, Supplement to: Parson, LM et al. (1989): The petrology of the lower series volcanics, ODP Site 642. In: Eldholm, O; Thiede, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 104, 419-428, https://doi.org/10.2973/odp.proc.sr.104.134.1989

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Abstract:
Between 1086.6 and 1229.4 m below seafloor at Site 642 on the Outer Vøring Plateau, a series of intermediate volcanic extrusive flow units and volcaniclastic sediments was sampled. A mixed sequence of dacitic subaerial flows, andesitic basalts, intermediate volcaniclastics, subordinate mid-ocean ridge basalt, (MORB) lithologies, and intrusives was recovered, in sharp contrast to the more uniform tholeiitic T-type MORB units of the overlying upper series. This lower series of volcanics is composed of three chemically distinct groups, (B, A2, A1), rather than the two previously identified. Flows of the dacitic group (B) have trace-element and initial Sr isotope signatures which indicate that their source magma derived from the partial melting of a component of continental material in a magma chamber at a relatively high level in the crust. The relative proportions of crustal components in this complex melt are not known precisely. The most basic group (A2) probably represents a mixture of this material with MORB-type tholeiitic melt. A third group (A1), of which there was only one representative flow recovered, is chemically intermediate between the two groups above, and may suggest a repetition of, or a transition phase in, the mixing processes.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 67.220000 * Longitude: 2.930000
Date/Time Start: 1985-07-04T00:10:00 * Date/Time End: 1985-08-01T23:00:00
Event(s):
104-642E * Latitude: 67.220000 * Longitude: 2.930000 * Date/Time Start: 1985-07-04T00:10:00 * Date/Time End: 1985-08-01T23:00:00 * Elevation: -1289.0 m * Penetration: 1229.4 m * Recovery: 372.73 m * Location: Norwegian Sea * Campaign: Leg104 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 108 cores; 906.9 m cored; 0 m drilled; 41.1 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
4 datasets

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Datasets listed in this publication series

  1. Parson, LM; Viereck-Götte, L; Love, D et al. (1989): (Table 1) Major-element analyses of lower series volcanics of ODP Hole 104-642E. https://doi.org/10.1594/PANGAEA.737398
  2. Parson, LM; Viereck-Götte, L; Love, D et al. (1989): (Table 4) Representative microprobe analyses of lower series samples, phenocrysts phases, and glass mesostases of ODP Hole 104-642E. https://doi.org/10.1594/PANGAEA.737401
  3. Parson, LM; Viereck-Götte, L; Love, D et al. (1989): (Table 3) Rare-earth element abundances of lower series volcanics of ODP Hole 104-642E. https://doi.org/10.1594/PANGAEA.737400
  4. Parson, LM; Viereck-Götte, L; Love, D et al. (1989): (Table 2) Trace-element abundances of lower series volcanics of ODP Hole 104-642E. https://doi.org/10.1594/PANGAEA.737399