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Utzmann, Achim; Hansteen, Thor H; Schmincke, Hans-Ulrich (2002): Chemistry of altered basaltic glass shards and zeolites of volcaniclastic sediments from ODP Hole 157-953C [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.666903, Supplement to: Utzmann, A et al. (2002): Trace element mobility during sub-seafloor alteration of basaltic glass from Ocean Drilling Program site 953 (off Gran Canaria). International Journal of Earth Sciences, 91(4), 661-679, https://doi.org/10.1007/s00531-001-0247-6

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Abstract:
Trace element concentrations of altered basaltic glass shards (layer silicates) and zeolites in volcaniclastic sediments drilled in the volcanic apron northeast of Gran Canaria during Ocean Drilling Program (ODP) leg 157 document variable element mobilities during low-temperature alteration processes in a marine environment. Clay minerals (saponite, montmorillonite, smectite) replacing volcanic glass particles are enriched in transition metals and rare earth elements (REE). The degree of retention of REE within the alteration products of the basaltic glass is correlated with the field strength of the cations. The high field-strength elements are preferentially retained or enriched in the alteration products by sorption through clay minerals. Most trace elements are enriched in a boundary layer close to the interface mineral–altered glass. This boundary layer has a key function for the physico-chemical conditions of the subsequent alteration process by providing a large reactive surface and by lowering the fluid permeability. The release of most elements is buffered by incorporation into secondary precipitates (sodium-rich zeolites, phillipsite, Fe- and Mn-oxides) as shown by calculated distribution coefficients between altered glasses and authigenic minerals. Chemical fluxes change from an open to a closed system behavior during prograde low-temperature alteration of volcaniclastic sediments with no significant trace metal flux from the sediment to the water column.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 28.650200 * Longitude: -15.144500
Date/Time Start: 1994-08-24T07:25:00 * Date/Time End: 1994-09-04T09:40:00
Event(s):
157-953C * Latitude: 28.650200 * Longitude: -15.144500 * Date/Time Start: 1994-08-24T07:25:00 * Date/Time End: 1994-09-04T09:40:00 * Elevation: -3589.0 m * Penetration: 1158.7 m * Recovery: 556.24 m * Location: Canarias Sea * Campaign: Leg157 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 102 cores; 971.7 m cored; 0 m drilled; 57.2 % 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. Utzmann, A; Hansteen, TH; Schmincke, H-U (2002): (Table 1) Major element composition of altered glass shards from ODP Hole 157-953C. https://doi.org/10.1594/PANGAEA.666883
  2. Utzmann, A; Hansteen, TH; Schmincke, H-U (2002): (Fig. 2) Distribution of the secondary minerals within altered volcaniclastic sediments from ODP Hole 157-953C. https://doi.org/10.1594/PANGAEA.666900
  3. Utzmann, A; Hansteen, TH; Schmincke, H-U (2002): (Table 3,4) Trace element concentrations of altered glasses and the secondary phases from ODP Hole 157-953C. https://doi.org/10.1594/PANGAEA.666897
  4. Utzmann, A; Hansteen, TH; Schmincke, H-U (2002): (Table 2) Chemical composition of zeolites from ODP Hole 157-953C. https://doi.org/10.1594/PANGAEA.666885