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Meyer, Romain; Hertogen, Jan GH; Pedersen, Rolf B; Viereck-Götte, Lothar; Abratis, Michael (2009): Elements and isotopic measurements of magmatic rock samples from ODP Hole 104-642E [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.763434, Supplement to: Meyer, R et al. (2009): Interaction of mantle derived melts with crust during the emplacement of the Vøring Plateau, N.E. Atlantic. Marine Geology, 261(1-4), 3-16, https://doi.org/10.1016/j.margeo.2009.02.007

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Abstract:
Trace element and isotopic signatures of magmatic rock samples from ODP Hole 642E at the Vøring Plateau provide insight into the interaction processes of mantle melt with crust during the initial magma extrusion phases at the onset of the continental breakup. The intermediate (basaltic-andesitic) to felsic (dacitic and rhyolitic) Lower Series magmas at ODP Hole 642E appear to be produced by large amounts of melting of upper crustal material. This study not only makes use of the traditional geochemical tools to investigate crust-mantle interaction, but also explores the value of Cs geochemistry as an additional tool. The element Cs forms the largest lithophile cation, and shows the largest contrast in concentration between (depleted) mantle and continental crust. As such it is a very sensitive indicator of involvement of crustal material. The Cs data reinforce the conclusion drawn from isotopic signatures that the felsic magmas are largely anatectic crustal melts. The down-hole geochemical variation within ODP Hole 642E defines a decreasing continental crustal influence from the Lower Series into the Upper Series.
This is essential information to distinguish intrinsic geochemical properties of the mantle melts from signatures imposed by crustal contamination. A comparison with data from the SE Greenland margin highlights the compositional asymmetry of the crust-mantle interactions at both sides of the paleo-Iapetus suture. While Lower Series and Middle Series rocks from the SE Greenland margin have isotopic signatures reflecting interactions with lower and middle crust, such signatures have not been observed at the mid-Norwegian margin. The geochemical data either point to a dissimilar Caledonian crustal composition and/or to different geodynamic pre-breakup rifting history at the two NE Atlantic margin segments.
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:
6 datasets

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Datasets listed in this publication series

  1. Meyer, R; Hertogen, JGH; Pedersen, RB et al. (2009): (Table 5) Sr, Nd isotopic data of the Lower Series melts from ODP Hole 104-642E. https://doi.org/10.1594/PANGAEA.763429
  2. Meyer, R; Hertogen, JGH; Pedersen, RB et al. (2009): (Table 4) Sr, Nd and Pb isotopic variations of the Upper Series magmas from ODP Hole 104-642E. https://doi.org/10.1594/PANGAEA.763428
  3. Meyer, R; Hertogen, JGH; Pedersen, RB et al. (2009): (Table 1) Major element concentrations of Upper Series magmas and Lower Series melts from ODP Hole 104-642E. https://doi.org/10.1594/PANGAEA.763425
  4. Meyer, R; Hertogen, JGH; Pedersen, RB et al. (2009): (Table 6) Pb isotopic compositions of the Lower Series melts from ODP Hole 104-642E. https://doi.org/10.1594/PANGAEA.763430
  5. Meyer, R; Hertogen, JGH; Pedersen, RB et al. (2009): (Table 3) Trace element measurements of selected samples from ODP Hole 104-642E. https://doi.org/10.1594/PANGAEA.763427
  6. Meyer, R; Hertogen, JGH; Pedersen, RB et al. (2009): (Table 2) Trace element concentrations of the Upper Series magmas from ODP Hole 104-642E. https://doi.org/10.1594/PANGAEA.763426