STXM-NEXAFS Analysis of Mineral-Organic Carbon Associations and OC Composition in North Atlantic Sediments

Scanning transmission X-ray microscopy coupled with near edge X-ray absorption spectroscopy (STXM-NEXAFS) data collected on beamline 11.0.2 at the Advanced Light Source (ALS, Lawrence Berkeley National Laboratory) on sediment samples from the North Atlantic gyre collected during piston coring cruise KN223 on the R/V Knorr in 2014. Data include (a) sample geochemistry and lithology (metadata, "STXMNEXAFS_Sample_Geochem.xlsx"), (b) transmission microscopy images with overlaid element masks (organic and inorganic carbon, Al, Fe, Mn, K, and Ca, "mask images.zip") and marked regions ("region images.zip") that carbon NEXAFS spectra were extracted from, (c) NEXAFS spectra extracted from element masks and marked regions ("STXMNEXAFS_mask_reg_spectra_data.xlsx"), and (d) pixel intensity maps of mineral-forming elements used to make element correlation plots ("pixel correlation maps.zip"). The use of the Advanced Light Source is supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences under contract
no. DE-AC02-05CH11231.