Proc. IODP, 302, Data report: high-resolution bulk density, dry density, and porosity records from the Arctic Coring Expedition, IODP Expedition 302

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Chapter contents Abstract Introduction Methods Bulk density corrections Dry density and porosity Results and discussion Conclusions Acknowledgments References Figures F1. Location map and seismic profile. F2. Core recovery diagram. F3. Lithostratigraphic column. F4. Crossplots of MSCL and MAD density. F5. Corrected density and porosity data. Tables T1. MAD data and MSCL density. T2. MSCL density correction factors by core. T3. Average correction factors. T4. Corrected MSCL bulk density and derived density and porosity. PDF file			Previous \| Next doi:10.2204/iodp.proc.302.201.2008 Conclusions The corrected ρ_B and derived ρ_D and ϕ logs from the MSCL data presented here provide improved and higher resolution petrophysical data sets for ongoing studies of the ACEX sediments. The ρ_D records are a necessary requirement for calculating mass accumulation rates, whereas the ϕ data can be used to investigate compaction-related processes at the ACEX site and, through integration with seismic data, regional lithology-dependent trends. However, variability remains in these records that is not entirely associated with in situ lithologic change. On future expeditions, improved MSCL data quality can be obtained with overlapping recovery from which high-quality cores can be selectively used in the construction of the composite section, higher resolution MAD sampling for comparison and correction of the MSCL data, and finally, when possible, the use of split-core MSCL systems that remove uncertainties associated with variations in core thicknesses. Top of page \| Previous \| Next

Conclusions