(Table 2) Compressional and shear wave velocites from basalts and sediments of the Atlantic and Pacific Ocean

• Main Authors: Christensen, Nikolas I, Fountain, David M, Stewart, Richard J
• Format: Dataset
• Language: English
• Published: PANGAEA 1973
• Subjects: 19-183; 19-184; 19-191; 19-192; 2-8A; 5-34; 5-40; 6-53; Comment; Deep Sea Drilling Project; Density; wet bulk; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Event label; Glomar Challenger; Leg19; Leg2; Leg5; Leg6; North Atlantic/CONT RISE; North Pacific/BASIN; North Pacific/Bering Strait/BASIN; North Pacific/Bering Strait/PLATEAU; North Pacific/GUYOT; North Pacific/Philippine Sea/RIDGE; North Pacific/PLAIN; Sample code/label; Velocity; compressional wave; shear wave; Bering Strait; Indian; Mid-Atlantic Ridge; Pacific; North Atlantic
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.762361; https://doi.org/10.1594/PANGAEA.762361

Compressional (Vp) and shear (Vs) wave velocities have been measured to 1.0 kbar for 14 cores of well-consolidated sedimentary rock from Atlantic and Pacific sites of the Deep Sea Drilling Project. The range of VP (2.05-5.38 km/sec at 0.5 kbar) shows significant overlap with the range of oceanic layer-2 seismic velocities determined by marine refraction surveys, suggesting that sedimentary rocks may, in some regions, constitute the upper portion of layer 2. Differing linear relationships between VP and Vs for basalts and sedimentary rocks, however, may provide a method of resolving layer-2 composition. This is illustra ted for a refraction survey site on the flank of the Mid-Atlantic Ridge where layer-2 velocities agree with basalt, and two sites on the Saya de Malha Bank in the Indian Ocean where layer-2 velocities appear to represent sedimentary rock.