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Gieskes, Joris M; Elderfield, Henry; Lawrence, James R; LaKind, Judy (1984): (Table 1) Interstitial water chemistry at DSDP Leg 78A Holes. PANGAEA,, Supplement to: Gieskes, JM et al. (1984): Interstitial water studies, Leg 78A. In: Biju-Duval, B; Moore, JC; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 78A, 377-384,

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Studies of interstitial water carried out during Deep Sea Drilling Project Leg 78A (Sites 541, 542, and 543) have revealed that alteration of volcanic material dispersed in the sediments is largely responsible for increased concentrations of dissolved calcium and decreased concentrations of dissolved magnesium and potassium. This conclusion is supported by studies of the 87Sr/86Sr ratio of dissolved strontium, as well as by studies of the oxygen isotopic composition of interstitial waters. At Site 543 a large part of the d18O decrease in the interstitial waters must result from diffusive exchange with underlying basement rocks. Data from studies of interstitial water do not indicate upward advection of fluids at Sites 541 and 542.
Median Latitude: 15.596220 * Median Longitude: -58.692460 * South-bound Latitude: 15.517000 * West-bound Longitude: -58.728300 * North-bound Latitude: 15.712300 * East-bound Longitude: -58.653700
Date/Time Start: 1981-02-13T00:00:00 * Date/Time End: 1981-02-28T00:00:00
Minimum DEPTH, sediment/rock: 8.5 m * Maximum DEPTH, sediment/rock: 450.0 m
78-541 * Latitude: 15.520000 * Longitude: -58.728300 * Date/Time: 1981-02-13T00:00:00 * Elevation: -4940.0 m * Penetration: 459 m * Recovery: 400.6 m * Location: North Atlantic/RIDGE * Campaign: Leg78 (Leg78AB) * Basis: Glomar Challenger * Device: Drilling/drill rig (DRILL) * Comment: 50 cores; 459 m cored; 0 m drilled; 87.3 % recovery
78-542 * Latitude: 15.517000 * Longitude: -58.713300 * Date/Time: 1981-02-21T00:00:00 * Elevation: -5016.0 m * Penetration: 240 m * Recovery: 35.3 m * Location: North Atlantic/RIDGE * Campaign: Leg78 (Leg78AB) * Basis: Glomar Challenger * Device: Drilling/drill rig (DRILL) * Comment: 4 cores; 38 m cored; 0 m drilled; 93 % recovery
78-542A * Latitude: 15.519500 * Longitude: -58.713300 * Date/Time: 1981-02-21T00:00:00 * Elevation: -5016.0 m * Penetration: 325.5 m * Recovery: 73 m * Location: North Atlantic/RIDGE * Campaign: Leg78 (Leg78AB) * Basis: Glomar Challenger * Device: Drilling/drill rig (DRILL) * Comment: 10 cores; 95 m cored; 0 m drilled; 76.8 % recovery
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event labelEvent
2Latitude of eventLatitude
3Longitude of eventLongitude
4Elevation of eventElevationm
5Sample code/labelSample labelGieskes, Joris MODP sample designationH indicates wash core
6CommentCommentGieskes, Joris M
7Depth, top/minDepth topmGieskes, Joris M
8Depth, bottom/maxDepth botmGieskes, Joris M
9DEPTH, sediment/rockDepthmGeocode – mbsf
10pHpHGieskes, Joris Msee reference(s)
11Alkalinity, totalATmmol(eq)/lGieskes, Joris Msee reference(s)
12SalinitySalGieskes, Joris Msee reference(s)unit is g/kg
13CalciumCammol/lGieskes, Joris Msee reference(s)
14MagnesiumMgmmol/lGieskes, Joris Msee reference(s)
15ChlorineClmg/kgGieskes, Joris Msee reference(s)
16StrontiumSrµmol/lGieskes, Joris Msee reference(s)
17Strontium 87/Strontium 8687Sr/86SrGieskes, Joris Msee reference(s)
18LithiumLiµmol/lGieskes, Joris Msee reference(s)
19PotassiumKmmol/lGieskes, Joris Msee reference(s)
20Sulfate[SO4]2-mmol/lGieskes, Joris Msee reference(s)
21Ammonium[NH4]+µmol/lGieskes, Joris Msee reference(s)
22SiliconSiµmol/lGieskes, Joris Msee reference(s)
23δ18O, waterδ18O H2O‰ SMOWGieskes, Joris Msee reference(s)
397 data points

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