- Chapter contents
- Abstract
- Introduction
- Methods
- Results
- Acknowledgments
- References
-
Figures - PDF file
doi:10.2204/iodp.proc.341.203.2017
Data report: X-ray florescence scanning of sediment cores, Site U1419, Gulf of Alaska1
Michelle Penkrot,2 Leah J. LeVay,3 and John M. Jaeger2
Abstract
Semiquantitative elemental results from X-ray fluorescence (XRF) scanning of sediment cores from Integrated Ocean Drilling Program (IODP) Site U1419 in the Gulf of Alaska are presented. This site contains varying lithofacies that have been previously correlated with glacial–interglacial changes in sedimentation and water-column productivity. XRF scanning was conducted to aid in interpretation of sedimentation during the last glacial period.
Crossplots of elements often interpreted as detrital and biogenically sourced show positive correlations between Ca and Al, Si, Ti, Sr, and Si with Al, with no correlation between Ca and Ba. When detrital elements were compared with volume-corrected shipboard magnetic susceptibility (MS), Fe and Ti appear to positively covary, whereas Al inversely covaries. K shows a similar downhole pattern to Fe and Ti, whereas Si is similar to Al. Zr alternates between positively and negatively covarying with Fe, Ti, and K. Mn, Rh, Rb, and Pb intensities show patterns similar to K, Ti, and Fe, whereas Sr is similar to Ca and Cr is similar to Al and Si. Ni and Zn intensities are inversely related to Al, Si, and Zr. S roughly mirrors trends displayed by Ca. Mo, Nb, Y, Ga, Ge, P, Ba, Bi, As, and Cu intensities show little to no downhole variation, and changes in Br and Cl intensities are most likely related to water content.