MacKillop, Kevin (2000): Index properties, consolidation characteristics and sediment rebound of ODP Sites 167-1020 and 167-1021 sediments [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.797475, Supplement to: MacKillop, K (2000): Data Report: Correction of index properties and the meters composite depth scale using elastic properties of Leg 167 sediments. In: Lyle, M; Koizumi, I; Richter, C; Moore, TC Jr (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 167, 1-6, https://doi.org/10.2973/odp.proc.sr.167.244.2000
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Abstract:
Drilling during Leg 167 at the California margin was scheduled to recover continuous sedimentary sections. Multiple advanced piston core (APC) holes drilled at different depth offsets provided core overlap in successive APCs. Correlation of high-resolution laboratory physical properties data from adjacent APC holes was used to compile composite depth sections for each site. The composite depth sections were used to confirm continuous recovery and enable high-resolution sampling. The meters composite depth (mcd) scale differs from the shipboard meters below seafloor (mbsf) scale because of (1) core expansion following recovery (MacKillop et al., 1995, doi:10.2973/odp.proc.sr.138.118.1995), (2) coring gaps, and (3) stretching/compression of sediment during coring (Lyle, Koizumi, Richter, et al., 1997, doi:10.2973/odp.proc.ir.167.1997). Moran (1997, doi:10.2973/odp.proc.sr.154.132.1997) calculated that sediment expansion accounted for 90%-95% of the Leg 154 depth offset between shipboard mbsf and the mcd scales.
Terzaghi's one-dimensional theory of consolidation (Terzaghi, 1943) describes the response of sediments to stress loading and release. Mechanical loading in marine environments is provided by the buoyant weight of the overlying sediments. The load increases with depth below seabed, resulting in sediment volume reduction as water is "squeezed" out of the voids in the sediment. Stress release during core recovery results in expansion of the sediment and volume increase as water returns to the sediment. The sediment expansion or rebound defines the elastic properties of the sediment. In this study we examine the elastic deformation properties of sediments recovered from Sites 1020 and 1021. These results are used to (1) correct the laboratory index properties measurements to in situ values and (2) determine the contribution of sediment rebound to the depth offset between the mbsf and mcd scales.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 40.047923 * Median Longitude: -127.108500 * South-bound Latitude: 39.087300 * West-bound Longitude: -127.783000 * North-bound Latitude: 41.009000 * East-bound Longitude: -126.434000
Date/Time Start: 1996-06-08T13:50:00 * Date/Time End: 1996-06-17T08:30:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
6 datasets
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Datasets listed in this publication series
- MacKillop, K (2000): (Table 6) Contribution of sediment rebound to the depth offset between mbsf and mcd scales at ODP Site 1020. https://doi.org/10.1594/PANGAEA.797473
- MacKillop, K (2000): (Table 3) Corrected index physical properties for APC cores at ODP Hole 167-1020B. https://doi.org/10.1594/PANGAEA.797471
- MacKillop, K (2000): (Table 7) Contribution of sediment rebound to the depth offset between mbsf and mcd scales at ODP Site 1021. https://doi.org/10.1594/PANGAEA.797474
- MacKillop, K (2000): (Table 4) Corrected index physical properties for APC cores at ODP Hole 167-1021B. https://doi.org/10.1594/PANGAEA.797472
- MacKillop, K (2000): (Table 2) Consolidation properties of sediments from ODP Sites 167-1020 and 167-1021. https://doi.org/10.1594/PANGAEA.797470
- MacKillop, K (2000): (Table 1) Index physical properties for consolidation samples of ODP Sites 167-1020 and 167-1021. https://doi.org/10.1594/PANGAEA.797469