Anderson, Roger N; Alt, Jeffrey C; Malpas, John (1989): Element analyses of DSDP/ODP Hole 504B basalt and breccia (Table 2) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.753002, Supplement to: Anderson, RN et al. (1989): Geochemical well logs and the determination of integrated chemical fluxes in Hole 504B, eastern equatorial Pacific. In: Becker, K; Sakai, H; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 111, 119-132, https://doi.org/10.2973/odp.proc.sr.111.138.1989
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Abstract:
Geochemical well logs were used to measure the dry weight percent oxide abundances of Si, Al, Ca, Mg, Fe, Ti, and K and the elemental abundances of Gd, S, Th, and U at 0.15-m intervals throughout the basement section of Hole 504B. These geochemical data are used to estimate the integrated chemical exchange resulting from hydrothermal alteration of the oceanic crust that has occurred over the last 5.9 Ma. A large increase in Si in the transition zone between pillows and dikes (Layers 2B and 2C) indicates that mixing of hot, upwelling hydrothermal fluids with cold, downwelling seawater occurred in the past at a permeability discontinuity at this level in the crust, even though the low-to-high permeability boundary in Hole 504B is now 500 m shallower (at the Layer 2A/2B boundary). The observations of extensive Ca loss and Mg gain agree with chemical exchanges recorded in the laboratory in experiments on the reactions that occur between basalt and seawater at high temperatures. The K budget requires significant addition to Layer 2A from both high-temperature depletion in Layers 2B and 2C and low-temperature alteration by seawater. Integrated water/rock ratios are derived for the mass of seawater required to add enriched elements and for the mass of hydrothermal fluid required to remove depleted elements in the crust at Hole 504B.
Project(s):
Deep Sea Drilling Project (DSDP)
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 1.227050 * Median Longitude: -83.730250 * South-bound Latitude: 1.226900 * West-bound Longitude: -83.730300 * North-bound Latitude: 1.227200 * East-bound Longitude: -83.730200
Date/Time Start: 1981-11-22T00:00:00 * Date/Time End: 1986-10-16T18:15:00
Minimum Elevation: -3474.0 m * Maximum Elevation: -3460.0 m
Event(s):
83-504B * Latitude: 1.227200 * Longitude: -83.730200 * Date/Time Start: 1981-11-22T00:00:00 * Date/Time End: 1982-01-02T00:00:00 * Elevation: -3460.0 m * Penetration: 1350 m * Recovery: 107.7 m * Campaign: Leg83 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: Leg 83 of DSDP was devoted entirely to coring and experiments in Hole 504B, the deepest borehole to date into the oceanic crust. Hole 504B now extends over a kilometer into basement, nearly twice as far as any other DSDP hole, and it is the only DSDP hole to have clearly penetrated into the intrusive sheeted dikes that underlie the extrusive pillow lavas of the upper oceanic crust. At Hole 504B, Leg 83 continued an ongoing DSDP effort that began during Legs 68, 69, and 70 in 1979, and also included part of Leg 92 in 1983. 71 cores; 514 m cored; 0 m drilled; 21 % recovery
111-504B * Latitude: 1.226900 * Longitude: -83.730300 * Date/Time Start: 1986-10-05T11:45:00 * Date/Time End: 1986-10-16T18:15:00 * Elevation: -3474.0 m * Penetration: 1562.1 m * Recovery: 27.36 m * Location: North Pacific Ocean * Campaign: Leg111 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 29 cores; 209 m cored; 0 m drilled; 13.1 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Sample code/label | Sample label | Anderson, Roger N | DSDP/ODP/IODP sample designation | ||
| 3 | Lithology/composition/facies | Lithology | Anderson, Roger N | |||
| 4 | Silicon dioxide | SiO2 | % | Anderson, Roger N | X-ray fluorescence (XRF) | |
| 5 | Aluminium oxide | Al2O3 | % | Anderson, Roger N | X-ray fluorescence (XRF) | |
| 6 | Iron oxide, Fe2O3 | Fe2O3 | % | Anderson, Roger N | X-ray fluorescence (XRF) | |
| 7 | Magnesium oxide | MgO | % | Anderson, Roger N | X-ray fluorescence (XRF) | |
| 8 | Calcium oxide | CaO | % | Anderson, Roger N | X-ray fluorescence (XRF) |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
42 data points