Physical properties of sediment core CRP-1

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, after correction for first-order control, porosity and velocity are not significantly influenced by lonestone abundance except for rare, very large lonestones.

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

Identifier
DOI https://doi.org/10.1594/PANGAEA.54619
PID https://hdl.handle.net/10013/epic.28316.d001
Related Identifier https://hdl.handle.net/10013/epic.28317.d001
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.54619
Provenance
Creator Niessen, Frank ORCID logo; Jarrard, Richard D; Bücker, Christian J
Publisher PANGAEA
Publication Year 1998
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Language English
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 22777 data points
Discipline Earth System Research
Spatial Coverage (163.755 LON, -77.008 LAT); off Cape Roberts, Ross Sea, Antarctica
Temporal Coverage Begin 1997-10-17T01:30:00Z
Temporal Coverage End 1997-10-24T02:00:00Z