DatasetSubset of particulate iron, particulate sulfur, dissolved hydrogen, and dissolved methane collected during the PLUME RAIDERS cruise (RR2106) on the R/V Roger Revelle from 18 September – 6 November 2021 along the 16-18ºS section of the Southern East Pacific RiseBaumberger, Tamara; Buck, Nathaniel; Antriasian, Anson; Bundy, Randelle M; Resing, Joseph; Moore, LauraThis dataset includes the concentrations of particulate total sulfur, particulate iron, dissolved hydrogen, and dissolved methane measurements for a subset of near-seafloor (< 40 m above bottom) and background water column samples collected on the 18 September to 6 November 2021 PLUME RAIDERS cruise to the 16-18ºS sector of the Southern East Pacific Rise on R/V Roger Revelle. Particulate iron and particulate total sulfur samples were collected at sea and later measured in lab using energy dispersive X-ray fluorescence (ED-XRF). Dissolved hydrogen and methane measurements were collected and processed shipboard using gas chromatography. Dr. Tamara Baumberger and Anson Antriasian generated the dissolved hydrogen and methane data. Nathan Buck generated the particulate iron and particulate total sulfur data."],"Methods":["Samples were collected on the R/V Roger Revelle (cruise RR2106, “PLUME RAIDERS”) expedition to the 16-18ºS section of the southern East Pacific Rise from 18 September to 6 November 2021. Teflon-Lined Go-Flo samplers (General Oceanics) were used to collect water column seawater samples from a trace metal clean CTD-rosette (Seabird Scientific; Cutter and Bruland 2012). Subsamples (100 mL) for dissolved hydrogen and methane were collected via syringe on deck and then analyzed onboard using gas chromatography following the methods outlined in Baumberger et al. (2014) and Kelley et al. (1998). Samples for pFe and pStot were collected in a shipboard clean-air laboratory by filtering seawater (average ~ 6 L) onto 0.2um polycarbonate track etched membrane filters (Whatman) with cellulose ester filter backings (Whatman), followed by a 15 mL rinse step using pH 8 MilliQ-NH4OH solution to remove excess sea salts. Samples were stored in a desiccator until the end of the cruise then later analyzed in the lab using energy dispersion X-ray fluorescence (ED-XRF) following the methods outlined in Buck et al. (2021). References: Baumberger, T., M. D. Lilley, J. A. Resing, J. E. Lupton, E. T. Baker, D. A. Butterfield, E. J. Olson, and G. L. Früh-Green. 2014. Understanding a submarine eruption through time series hydrothermal plume sampling of dissolved and particulate constituents: West Mata, 2008–2012. Geochem. Geophys. Geosystems 15: 4631–4650. doi:10.1002/2014GC005460.Received\n\nBuck, N. J., P. M. Barrett, P. L. Morton, W. M. Landing, and J. A. Resing. 2021. Energy dispersive X-ray fluorescence methodology and analysis of suspended particulate matter in seawater for trace element compositions and an intercomparison with high-resolution inductively coupled plasma-mass spectrometry. Limnol. Oceanogr. Methods 19: 401–415. doi:10.1002/lom3.10433\n\nCutter, G. A., and K. W. Bruland. 2012. Rapid and noncontaminating sampling system for trace elements in global ocean surveys. Limnol. Oceanogr. Methods 10: 425–436. doi:10.4319/lom.2012.10.425\n\nKelley, D. S., M. D. Lilley, J. E. Lupton, and E. J. Olson. 1998. Enriched H2, CH4, 3He concentrations in hydrothermal plumes associated with the 1996 Gorda Ridge eruptive event. Deep-Sea Res. Part II Top. Stud. Oceanogr. 45: 2665–2682. doi:10.1016/S0967-0645(98)00088-5"],"Other":["Funding provided by the National Science Foundation\n\nCrossref Funder Registry ID: https://ror.org/021nxhr62\n\nAward number: 1756402"]}Zenodo2025-01-0110670902https://doi.org/10.5281/zenodo.174283101756402southern East Pacific RiseTrace ElementsHydrothermal Vents/chemistrydissolved gasesironsulfurhydrogenmethane1National Science Foundation