Egeberg, Per Kristian (1992): (Table 1) Pore-water composition of ODP Leg 126 sites [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.774252, Supplement to: Egeberg, PK (1992): Thermodynamic aspects of Leg 126 interstitial waters. In: Taylor, B; Fujioka, K; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 126, 519-529, https://doi.org/10.2973/odp.proc.sr.126.153.1992
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Abstract:
The Ocean Drilling Program Leg 126 sites may be classified into two categories depending on the presence (Group I: Sites 787, 792, and 793) or absence (Group II: Sites 788, 790, and 791) of steep concentration gradients. Shipboard X-ray diffraction analyses of bulk sediments from Group I sites revealed the presence of a number of diagenetic minerals (some of which are incompatible), but no systematic diagenetic zonation. The results of the chemical analyses of the pore waters from Group I have been used to estimate the activities of dissolved species. Thermodynamic analyses of the composition of the pore waters and the stability of authigenic minerals (gypsum, zeolites, feldspars, smectites, chlorites, and micas) show that the pore waters are close to equilibrium with most of the observed phases. Thus, only a small perturbation of the system (substitution in minerals and fluctuations in pore-water composition, in particular, in pH and SiO2 activity) will cause any of these phases to precipitate. Therefore, one would not expect mineralogical observations to show systematic vertical zonations at these sites. It is suggested that chlorites and high-temperature zeolites are not diagenetic sensu stricto, but were eroded from volcaniclastic highs. The absence of concentration gradients at the Group II sites has been analyzed in terms of reaction kinetics, hydrothermal advection, and temperature distribution. The absence of diagenetic imprints on the pore-water concentration profiles at these sites is probably caused by the slow nucleation of silica phases.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 31.440309 * Median Longitude: 140.244633 * South-bound Latitude: 30.910900 * West-bound Longitude: 139.837000 * North-bound Latitude: 32.399800 * East-bound Longitude: 140.888200
Date/Time Start: 1989-04-24T14:55:00 * Date/Time End: 1989-06-17T18:55:00
Minimum DEPTH, sediment/rock: 2.95 m * Maximum DEPTH, sediment/rock: 1258.95 m
Event(s):
126-787B * Latitude: 32.375700 * Longitude: 140.749400 * Date/Time Start: 1989-04-24T14:55:00 * Date/Time End: 1989-04-27T12:00:00 * Elevation: -3265.0 m * Penetration: 320.1 m * Recovery: 159.88 m * Location: North Pacific Ocean * Campaign: Leg126 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 34 cores; 320.1 m cored; 0 m drilled; 49.9 % recovery
126-788C * Latitude: 30.922000 * Longitude: 140.003800 * Date/Time Start: 1989-05-14T01:20:00 * Date/Time End: 1989-05-15T03:15:00 * Elevation: -1113.0 m * Penetration: 262.5 m * Recovery: 146.15 m * Location: Philippine Sea * Campaign: Leg126 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 28 cores; 258.5 m cored; 0 m drilled; 56.5 % recovery
126-790A * Latitude: 30.915400 * Longitude: 139.843900 * Date/Time Start: 1989-04-29T15:56:00 * Date/Time End: 1989-04-30T06:30:00 * Elevation: -2233.0 m * Penetration: 37.4 m * Recovery: 35.71 m * Location: Philippine Sea * Campaign: Leg126 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 4 cores; 37.4 m cored; 0 m drilled; 95.5 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Sample code/label | Sample label | Egeberg, Per Kristian | DSDP/ODP/IODP sample designation | ||
| 3 | DEPTH, sediment/rock | Depth sed | m | Geocode – mbsf | ||
| 4 | Lithologic unit/sequence | Unit | Egeberg, Per Kristian | |||
| 5 | pH | pH | Egeberg, Per Kristian | |||
| 6 | Alkalinity, total | AT | mmol(eq)/l | Egeberg, Per Kristian | ||
| 7 | Chlorine | Cl | mmol/l | Egeberg, Per Kristian | ||
| 8 | Sulfate | [SO4]2- | mmol/l | Egeberg, Per Kristian | ||
| 9 | Sodium | Na | mmol/l | Egeberg, Per Kristian | ||
| 10 | Magnesium | Mg | mmol/l | Egeberg, Per Kristian | ||
| 11 | Calcium | Ca | mmol/l | Egeberg, Per Kristian | ||
| 12 | Potassium | K | mmol/l | Egeberg, Per Kristian | ||
| 13 | Iron 2+ | Fe2+ | µmol/l | Egeberg, Per Kristian | ||
| 14 | Silicon dioxide | SiO2 | µmol/l | Egeberg, Per Kristian |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
1019 data points