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Christensen, Nikolas I; Salisbury, Matthew H (1973): Velocities and elastic moduli of basalts from Pacific DSDP sites [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.708417, Supplement to: Christensen, NI; Salisbury, MH (1973): Velocities, elastic moduli and weathering-age relations for Pacific Layer 2 basalts. Earth and Planetary Science Letters, 19(4), 461-470, https://doi.org/10.1016/0012-821X(73)90190-8

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Abstract:
Compressional (Vp) and shear (Vs) wave velocities have been measured to 10 kb in 32 cores of basalt from 14 Pacific sites of the Deep Sea Drilling Project. Both Vp and V s show wide ranges (3.70 to 6.38 km/sec for Vp and 1.77 to 3.40 km/sec for V s at 0.5 kb) which are linearly related to density and sea floor age, confirming earlier findings by Christensen and Salisbury of decreasing velocity with progressive submarine weathering based on studies of basalts from five sites in the Atlantic. Combined Pacific and Atlantic data give rates of decreasing velocity of -1.89 and -1.35 km/sec per 100 my for Vp and Vs respectively. New analyses of oceanic seismic refraction data indicate a decrease in layer 2 velocities with age similar to that observed in the laboratory, suggesting that weathering penetrates to several hundred meters in many regions and is largely responsible for the extreme range and variability of layer 2 refraction velocities.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 15.203433 * Median Longitude: -144.121729 * South-bound Latitude: 0.481700 * West-bound Longitude: 140.301700 * North-bound Latitude: 40.984700 * East-bound Longitude: -82.888200
Date/Time Start: 1969-04-15T00:00:00 * Date/Time End: 1970-01-23T00:00:00
Event(s):
5-32 * Latitude: 37.127200 * Longitude: -127.556300 * Date/Time: 1969-04-15T00:00:00 * Elevation: -4758.0 m * Penetration: 215 m * Recovery: 85.9 m * Location: North Pacific/PLAIN * Campaign: Leg5 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 13 cores; 104 m cored; 9 m drilled; 82.6 % recovery
5-34 * Latitude: 39.470200 * Longitude: -127.275700 * Date/Time: 1969-04-23T00:00:00 * Elevation: -4322.0 m * Penetration: 384 m * Recovery: 102.2 m * Location: North Pacific/PLAIN * Campaign: Leg5 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 17 cores; 126 m cored; 0 m drilled; 81.1 % recovery
5-36 * Latitude: 40.984700 * Longitude: -130.109700 * Date/Time: 1969-05-06T00:00:00 * Elevation: -3273.0 m * Penetration: 115.5 m * Recovery: 102.7 m * Location: North Pacific/RIDGE * Campaign: Leg5 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 13 cores; 104.5 m cored; 0 m drilled; 98.3 % 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. Christensen, NI; Salisbury, MH (1973): (Table 3) Effective elastic constants calculated from velocities of Pacific DSDP Site basalts. https://doi.org/10.1594/PANGAEA.708416
  2. Christensen, NI; Salisbury, MH (1973): (Table 2) Compressional wave velocities of Pacific DSDP Site basalts. https://doi.org/10.1594/PANGAEA.708414
  3. Christensen, NI; Salisbury, MH (1973): (Table 2) Shear wave velocities of Pacific DSDP Site basalts. https://doi.org/10.1594/PANGAEA.708415