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Hart, Stanley R; Mottl, Michael J (1983): (Table 1) Uranium at DSDP Hole 69-504B pore water. PANGAEA,, Supplement to: Hart, SR; Mottl, MJ (1983): Alkali and Sr isotope geochemistry of waters collected from basaltic basement, Deep Sea Drilling Project Hole 504B, Costa Rica Rift. In: Cann, JR; Langseth, MG; Honnorez, J; Von Herzen, RP; White, SM; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office)Government Printing Office, 69, 487-494,

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Basalt formation waters collected from Hole 504B at sub-basement depths of 194, 201, 365, and 440 meters show inverse linear relationships between 87Sr/86Sr and Ca, 87Sr/86Sr and Sr, and K and Ca. If the Ca content of a fully reacted formation water end-member is assumed to be 1340 ppm, the K, Sr, and 87Sr/86Sr values for the end-member are 334 ppm, 7.67 ppm, and 0.70836, respectively. With respect to contemporary seawater at Hole 504B, K is depleted by 13%, Sr is enriched by 2.7%, and 87Sr/86Sr is depleted by 0.8%. The Sr/Ca ratio of the formation water (0.0057) is much lower than that of seawater (0.018) but is similar to the submarine hot spring waters from the Galapagos Rift and East Pacific Rise and to geothermal brines from Iceland. At the intermediate temperatures represented by the Hole 504B formation waters (70°-105°C), the interaction between seawater and the ocean crust produces large solution enrichments in Ca, the addition of a significant basalt Sr isotope component accompanied by only a minor elemental Sr component, and the removal from solution of seawater K. The Rb, Cs, and Ba contents of the formation waters appear to be affected by contamination, possibly from drilling muds.
Latitude: 1.227200 * Longitude: -83.730200
Date/Time Start: 1979-10-07T00:00:00 * Date/Time End: 1979-10-07T00:00:00
Minimum DEPTH, sediment/rock: 194 m * Maximum DEPTH, sediment/rock: 440 m
69-504B * Latitude: 1.227200 * Longitude: -83.730200 * Date/Time: 1979-10-07T00:00:00 * Elevation: -3460.0 m * Penetration: 489 m * Recovery: 262 m * Campaign: Leg69 * Basis: Glomar Challenger * Device: Drilling/drill rig (DRILL)
Sediment depth is given in mbsf. Concentrations are corrected (+0.67%) for HCl dilution.
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Sample IDSample IDHart, Stanley R
2DEPTH, sediment/rockDepthmGeocode
3PotassiumKmg/kgHart, Stanley Rsee reference(s)
4RubidiumRbmg/kgHart, Stanley Rsee reference(s)
5CaesiumCsmg/kgHart, Stanley Rsee reference(s)
6BariumBamg/kgHart, Stanley Rsee reference(s)
7StrontiumSrmg/kgHart, Stanley Rsee reference(s)
8Strontium 87/Strontium 86 ratio87Sr/86SrHart, Stanley Rsee reference(s)Normalized to 0.70800 for E & A standard
9Strontium 87/Strontium 86, error87Sr/86Sr e±Hart, Stanley Rsee reference(s)2 sigma
10CalciumCamg/kgHart, Stanley Rsee reference(s)From Mottl, Anderson, et al. (1983) and Leg 83 shipboard report
11Potassium/Rubidium ratioK/RbHart, Stanley Rsee reference(s)
12Potassium/Caesium ratioK/CsHart, Stanley Rsee reference(s)(x 10**6)
13Potassium/Strontium ratioK/SrHart, Stanley Rsee reference(s)
14Potassium/Barium ratioK/BaHart, Stanley Rsee reference(s)(x 10**3)
92 data points

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