Blanc, Gérard; Stille, Peter; Vitali, Frédéric (1994): Geochemistry of interstitial waters of Lau Backarc Basin sediment samples [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.803127, Supplement to: Blanc, G et al. (1994): Hydrogeochemistry in the Lau backarc basin. In: Hawkins, J; Parson, L; Allan, J; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 135, 677-688, https://doi.org/10.2973/odp.proc.sr.135.123.1994
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Abstract:
Interstitial water samples from Sites 834 through 839, drilled during Ocean Drilling Program Leg 135 in the backarc Lau basin (Southwestern Pacific), have been analyzed for major elements, manganese, copper, strontium, barium, vanadium, and 87Sr/86Sr isotopic composition values. The concentration-depth profiles of the major chemical components show almost straight concentration gradients at all sites, and seem to reflect slight alteration of volcanic material. However, in the lower part of the sedimentary cover, where volcanogenic material is abundant and where diagenetic minerals occur, systematic decreases in calcium, strontium, manganese, copper, and vanadium concentrations are observed. A downwelling flow of bottom seawater, which affected the diagenetic chemical signature of the interstitial water, is probably responsible for the recorded chemical features. This hypothesis is supported by strontium isotope data obtained from interstitial water samples at Site 835. It is also in accordance with data from heat flow and physical properties.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -19.037117 * Median Longitude: -177.209550 * South-bound Latitude: -20.827000 * West-bound Longitude: -177.862000 * North-bound Latitude: -18.501000 * East-bound Longitude: -176.500000
Date/Time Start: 1990-12-21T20:35:00 * Date/Time End: 1991-01-17T16:00:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
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Datasets listed in this publication series
- Blanc, G; Stille, P; Vitali, F (1994): (Table 1) Geochemistry of interstitial water samples of ODP Leg 135 sites. https://doi.org/10.1594/PANGAEA.803125
- Blanc, G; Stille, P; Vitali, F (1994): (Table 2) Strontium isotope ratios of interstitial water samples of ODP Hole 135-835A. https://doi.org/10.1594/PANGAEA.803126