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Warren, Nick; Rosendahl, Bruce R (1980): Velocity-density systematics for basalts at DSPD Leg 54 Holes [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.823561, Supplement to: Warren, N; Rosendahl, BR (1980): Velocity-density systematics for basalts drilled on the East Pacific Rise and Galapagos Rift during Deep Sea Drilling Leg 54. In: Rosendahl, BR; Hekinian, R; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 54, 853-863, https://doi.org/10.2973/dsdp.proc.54.139.1980

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Abstract:
Precise velocity and density measurements at atmospheric and elevated pressures have been obtained on basalts drilled in 13 holes during Leg 54. The vp-sigma data show systematics which are controlled by the degree of crystallinity (or conversely, glassiness), microstructure, and original mineralogy and chemistry. Extensively fractionated basalts with marked iron enrichment produce anomalously low measured velocities at densities above 2.90 g/cm**3. Also, the effective in situ pressure acting on Leg 54 basalts is less than hydrostatic, and perhaps close to zero. At zero effective pressure, the measured velocities average 2.5 km/s higher than East Pacific Rise upper crustal velocities determined by seismic refraction. This implies that the in situ velocities are undoubtedly a result of the highly fragmented nature of East Pacific Rise crust.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 5.006335 * Median Longitude: -96.139981 * South-bound Latitude: 0.588800 * West-bound Longitude: -106.764500 * North-bound Latitude: 9.176500 * East-bound Longitude: -86.070300
Date/Time Start: 1977-05-10T00:00:00 * Date/Time End: 1977-06-09T00:00:00
Event(s):
54-420 * Latitude: 9.001700 * Longitude: -106.112800 * Date/Time: 1977-05-10T00:00:00 * Elevation: -3381.0 m * Penetration: 147 m * Recovery: 82.2 m * Location: North Pacific/SEDIMENT POND * Campaign: Leg54 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 15 cores; 123.2 m cored; 0 m drilled; 66.7 % recovery
54-421 * Latitude: 9.023500 * Longitude: -106.061300 * Date/Time: 1977-05-12T00:00:00 * Elevation: -3339.0 m * Penetration: 114 m * Recovery: 11.2 m * Location: North Pacific/CONT RISE * Campaign: Leg54 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 4 cores; 38 m cored; 114 m drilled; 29.5 % recovery
54-422 * Latitude: 9.176500 * Longitude: -105.271200 * Date/Time: 1977-05-14T00:00:00 * Elevation: -3247.0 m * Penetration: 73.8 m * Recovery: 48 m * Location: North Pacific/RIDGE * Campaign: Leg54 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 11 cores; 73.8 m cored; 0 m drilled; 65 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets

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Datasets listed in this publication series

  1. Warren, N; Rosendahl, BR (1980): (Table 6) Test of pore connectiveness by comparison of measured and predicted wet-bulk densities for basalts from DSDP Leg 54 Holes. https://doi.org/10.1594/PANGAEA.823560
  2. Warren, N; Rosendahl, BR (1980): (Table 4) Dry-bulk densities and grain densities at DSDP Leg 54 Holes. https://doi.org/10.1594/PANGAEA.823559
  3. Warren, N; Rosendahl, BR (1980): (Table 3) Modal analyses of basaltic rocks at DSDP Leg 54 Holes. https://doi.org/10.1594/PANGAEA.823558