IODP Expedition 378 Portable X-ray fluorescence (p-XRF)

• Main Authors: Röhl, Ursula, Thomas, Deborah J., Childress, Laurel B., Anagnostou, Eleni, Ausín, Blanca, Boscolo Galazzo, Flavia, Dias, Bruna Borba, Brzelinski, Swaantje, Dunlea, Ann G., George, Simon C., Haynes, Laura L., Hendy, Ingrid L., Jones, Heather L., Khanolkar, Sonal S., Kitch, Gabriella D., Lee, Hojun, Raffi, Isabella, Reis, Alex J., Sheward, Rosie M., Sibert, Elizabeth, Tanaka, Erika, Wilkens, Roy H., Yasukawa, Kazutaka, Yuan, Wei, Zhang, Qiang, Zhang, Yang, Drury, Anna J., Hollis, Christopher J.
• Other Authors: International Ocean Discovery Program
• Format: Other/Unknown Material
• Language: unknown
• Published: International Ocean Discovery Program 2022
• Subjects: International Ocean Discovery Program; IODP; JOIDES Resolution; Expedition 378; Site U1553; South Pacific Paleogene Climate; climate and ocean change; Campbell Plateau; high southern latitude; carbon system dynamics; Cenozoic climate history; high CO2 world; chronostratigraphy; ocean circulation; intermediate water formation; hydrologic cycling; biological productivity; ice sheet dynamics; Ice Sheet
• Online Access: https://doi.org/10.5281/zenodo.10810004

Energy-Dispersive X-Ray Fluorescence (ED-XRF) is a rapid, non-destructive technique for determining qualitative and quantitative changes in chemical composition. Aboard the JOIDES Resolution, pXRF is used for measuring points on section halves, rock pieces, and sometimes powders. Spots are typically irradiated at multiple conditions to excite and measure a wide range of elements. The peak intensity changes (we do not provide concentrations) are then used to help recognize and define major chemo-stratigraphic units without the need for destructive sampling.