Vengosh, Avner; Gieskes, Joris M; Mahn, Chris L (2000): Chemical and isotope compositions of interstitial water in sediments from Mediterranean basin at DSDP Sites 42-372 and 42-374 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.704810, Supplement to: Vengosh, A et al. (2000): New evidence for the origin of hypersaline pore fluids in the Mediterranean basin. Chemical Geology, 163(1), 287-298, https://doi.org/10.1016/S0009-2541(99)00131-X
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Abstract:
The Br/Cl, Li/Cl and B/Cl ratios and boron isotope compositions of hypersaline pore fluids from DSDP Sites 372 and 374 were measured in an attempt to evaluate the origin of the brines. In Site 374 the relationships between the Cl concentrations (up to 5000 mM) and Br/Cl (~0.012), Na/Cl (as low as 0.1), B/Cl (0.0025), and d11B values (43-55 per mil ) of the deep pore water between 380 and 405 mbsf, located within the Messinian sediments, reflect remnants of ~65-fold evaporated sea water. The original evaporated sea water was modified by: (1) dilution with overlying or less saline water by about 30%; and (2) slight dissolution of NaCl evaporites. The variations in d11B show a continuous increase in d11B values with depth in Site 374, up to 66.7 per mil at a depth of 300 mbsf (Upper Pliocene marl sediments). The conspicuous 11B enrichment trend is consistent with elemental boron depletion, which was calculated from the expected boron concentrations of evaporated sea water with corresponding Br/Cl and Na/Cl ratios. Li/Cl variations also show a depletion of Li relative to evaporated sea water. The apparent depletions of B and Li, as well as the 11B enrichment, reflect uptake of these elements by clay minerals at low water/sediment ratios.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 37.963900 * Median Longitude: 11.496400 * South-bound Latitude: 35.847800 * West-bound Longitude: 4.796500 * North-bound Latitude: 40.080000 * East-bound Longitude: 18.196300
Date/Time Start: 1975-04-19T00:00:00 * Date/Time End: 1975-05-01T00:00:00
Event(s):
42-372 * Latitude: 40.080000 * Longitude: 4.796500 * Date/Time: 1975-04-19T00:00:00 * Elevation: -2699.0 m * Penetration: 885 m * Recovery: 314.5 m * Location: Mediterranean Sea/BASIN * Campaign: Leg42 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 46 cores; 431 m cored; 0 m drilled; 72.9 % recovery
42-374 * Latitude: 35.847800 * Longitude: 18.196300 * Date/Time: 1975-05-01T00:00:00 * Elevation: -4078.0 m * Penetration: 457 m * Recovery: 76.2 m * Location: Mediterranean Sea/BASIN * Campaign: Leg42 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 22 cores; 141 m cored; 12.5 m drilled; 54 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
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Datasets listed in this publication series
- Vengosh, A; Gieskes, JM; Mahn, CL (2000): (Table 1) Chemical and isotope compositions of interstitial water in sediments from Mediterranean basin at DSDP Site 42-372. https://doi.org/10.1594/PANGAEA.704767
- Vengosh, A; Gieskes, JM; Mahn, CL (2000): (Table 1) Chemical and isotope compositions of interstitial water in sediments from Mediterranean basin at DSDP Site 42-374. https://doi.org/10.1594/PANGAEA.704768