Physical properties of sediment core CRP-1 ...

• Main Authors: Niessen, Frank, Jarrard, Richard D, Bücker, Christian J
• Format: Dataset
• Language: English
• Published: PANGAEA 1998
• Subjects: DEPTH, sediment/rock; Susceptibility; Magnetic susceptibility, volume; Velocity, compressional wave; Density, wet bulk; Porosity; Core wireline system; Multi-Sensor Core Logger 17, GEOTEK; Calculated; CRP-1; Sampling/drilling ice; Cape Roberts Project CRP; Antarc*; Antarctica; antartic*; Ross Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.54619; https://doi.pangaea.de/10.1594/PANGAEA.54619

The relationship between whole-core compressional wave velocities and gamma-ray attenuation porosities of sediments cored at CRP-1 is examined and compared with results from core-plug samples and global models. Both core-plug and whole-core velocities show a strong dependence on porosity: this relationship appears to be independent of lithology. In the range from 0.1 to 0.4 of fractional porosity (Miocene strata), plug velocities are generally 0.2 - 0.5 km s-1 higher than whole-core velocities. Possible reasons include decreased rigidity in the whole core and diagenetic changes in the plugs. Possibly both velocity measurements are correct but neither is fully representative for in situ conditions. It appears that the core-plug results are more compatible with data from other regions than the whole-core data. After removing first-order compaction control from the whole-core porosity record, a second-order control by clay content can be quantified as a simple positive linear regression (R=0.6). In contrast, ... : Supplement to: Niessen, Frank; Jarrard, Richard D (1998): Velocity and porosity of sediments from CRP-1 drillhole, Ross Sea, Antarctica. Terra Antartica, 5(3), 311-318 ...