Selected Recent Publications

Evans, G. N., Z. Krauss, M. D. Lilley, W. E. Seyfried, Jr., and W. S. D. Wilcock (2025 and in press), Tectonically induced changes in vent fluid compositions and metal concentrations at Main Endeavour Field, Northeast Pacific Ocean, Earth and Planetary Science Letters. 

Seyfried, W. E., Jr. Evans, G., N., Xing, Y., (2025 and in-press), Geochemical Controls on the Composition of Hydrothermal Vent Fluids at Mid-Ocean Ridges, in: Coogan, L.A., Dunlea, A., Bach, W. (Eds.), Chapman Conference on Hydrothermal Circulation and Seawater Chemistry. American Geophysical Union, Agros, Cyprus.

Evans, G. N., S. Ji, B. Kaçar, A. D. Anbar, and W. E. Seyfried (2024), Transition metals in alkaline Lost City vent fluids are sufficient for early-life metabolisms, Geochimica Et.  Cosmochimica Acta, 385, 61-73. 

Evans, G. N., S. Charin, W. E. Seyfried, and X.-Y. Zheng (2024), The role of mafic intrusions in producing alkaline vent fluids at the Lost City Hydrothermal Field: Evidence from stable potassium isotopes, Geochimica Et Cosmochimica Acta, 386, 84-95.

Evans, G. N., Coogan, L. A., Kaçar, B., Seyfried, W. E. Jr. (2023). Molybdenum in basalt-hosted seafloor hydrothermal systems: Experimental, theoretical, and field sampling approaches. Geochimica Et Cosmochimica Acta 353, 28-44. 

Hughes, E.R., Waldeck, A.R., Moriarty, S.N., Jamieson, J.W., Martin, A.J., Scheuermann, P.P., Syverson, D.D., Seyfried, W.E., Jr., Reeves, E.P. and Johnston, D.T. (2023). The influence of submarine hydrothermal systems on seawater sulfate. Geochimica Et Cosmochimica Acta 344, 73-89. 

Evans G. N., Seyfried W. E., Jr.  and Tan C. (2023) Nutrient transition metals in a time series of hydrothermal vent fluids, Main Endeavour Field, Juan de Fuca Ridge. Earth and Planetary Science Letters, 602. https://doi.org/10.1016/j.epsl.2022.117943. 

Xing Y., Brugger J., Scheuermann P., Tan C., Ji S. and Seyfried W. E., Jr. (2022) An experimental and thermodynamic study of sphalerite solubility in chloride-bearing fluids at 300–450°C, 500 bars: Implications for zinc transport in seafloor hydrothermal systems. Geochimica Et Cosmochimica Acta 330, 131-147.

Ramos D. P. S., Nielsen S. G., Coogan L. A., Scheuermann P. P., Seyfried W. E., Jr. and Higgins J. A. (2022) The effect of high-temperature alteration of oceanic crust on the potassium isotopic composition of seawater. Geochimica Et Cosmochimica Acta 339, 1-11.

Seyfried W. E. Jr., Tan C., Wang X., Wu S., Evans G. N., Coogan L. A., Mihaly S. F. and Lilley M. D. (2022) Time series of hydrothermal vent fluid chemistry at Main Endeavour Field, Juan de Fuca Ridge: Remote sampling using the NEPTUNE cabled observatory. Deep-Sea Research Part I-Oceanographic Research Papers 186, 103809. 

Hsieh Y. T., Bridgestock L., Scheuermann P. P., Seyfried W. E., Jr. and Henderson G. M. (2021) Barium isotopes in mid-ocean ridge hydrothermal vent fluids: A source of isotopically heavy Ba to the ocean. Geochimica Et Cosmochimica Acta 292, 348-363. 

Syverson D. D., Borrok D. M., Niebuhr S. and Seyfried W. E., Jr. (2021a) Chalcopyrite-dissolved Cu isotope exchange at hydrothermal conditions: Experimental constraints at 350° C and 50 MPa. Geochimica Et Cosmochimica Acta 298, 191-206. 

Syverson D. D., Katchinoff J. A. R., Yohe L. R., Tutolo B. M., Seyfried W. E., Jr. and Rooney A. D. (2021b) Experimental partitioning of osmium between pyrite and fluid: Constraints on the mid-ocean ridge hydrothermal flux of osmium to seawater. Geochimica Et Cosmochimica Acta 293, 240-255 

Tudor, A., A.P.G. Fowler, D.I. Foustoukos, B. Moskowitz, L. Wang, C Tan, W.E. Seyfried (2021), Geochemistry of vapor-dominated hydrothermal vent deposits in Yellowstone Lake, Wyoming, Journal of Volcanology and Geothermal Research, 107231

Tan, C.,  A.P.G. Fowler, A. Tudor, W. E. Seyfried (2020), Heat and mass transport in sublacustrine vents in Yellowstone Lake, Wyoming: In-situ chemical and temperature data documenting a dynamic hydrothermal system, Journal of Volcanology and Geothermal Research, 405, 107043

Tutolo, B. M., W. E. Seyfried, and N. J. Tosca (2020), A seawater throttle on H2 production in Precambrian serpentinizing systems, Proceedings of the National Academy of Sciences, 117(26), 14756-14763.

Scheuermann, P. P., Y. Xing, K. Ding, and W. E. Seyfried Jr (2020), Experimental measurement of H2 (aq) solubility in hydrothermal fluids: application to the Piccard hydrothermal field, Mid-Cayman Rise, Geochim. Cosmochim. Acta.

Tutolo, B. M., A. J. Luhmann, X. Z. Kong, B. Bagley, D. Alba-Venero, N. Mitchell, M. O. Saar, and W. E. J. Seyfried (2020), The contribution of visible and invisible pores to porosity generation and anomalous trace element release from dolomite Geochemical Perspectives Letters. 14, 42–46 

Tutolo, B.M., Kiesel, T., Luhmann, A.J., Solheid, P. and Seyfried, W.E. (2020) Experimental evaluation of the role of redox during glauconite-CO2-brine interactions. Appl. Geochem. 115, 104558.

Tao, C., W. Seyfried, R. Lowell, Y. Liu, J. Liang, Z. Guo, K. Ding, H. Zhang, J. Liu, and L. Qiu (2020), Deep high-temperature hydrothermal circulation in a detachment faulting system on the ultra-slow spreading ridge, Nature communications, 11(1), 1-9.

Coogan, L.A., Seyfried, W.E., Jr. and Pester, N.J. (2019) Environmental controls on mid-ocean ridge hydrothermal fluxes. Chem. Geol. 528, 119285.

Scheuermann, P.P., Tutolo, B.M. and Seyfried, W.E., Jr. (2019) Anhydrite solubility in low-density hydrothermal fluids: Experimental measurements and thermodynamic calculations. Chem. Geol. 524, 184-195.

Fowler, A.P.G., Scheuermann, P., Tan, C. and Seyfried, W.E., Jr. (2019) Titanium reactors for redox-sensitive hydrothermal experiments: An assessment of dissolved salt on H2 activity-concentration relations. Chem. Geol. 515, 87-93.

Fowler, A.P.G., Tan, C., Luttrell, K., Tudor, A., Scheuermann, P., Pat Shanks, W.C. and Seyfried, W.E., Jr. (2019) Geochemical heterogeneity of sublacustrine hydrothermal vents in Yellowstone Lake, Wyoming. J. Volcanol. Geotherm. Res. 386, 106677.

Fowler, A.P.G., Liu, Q.-l., Huang, Y., Tan, C., Volk, M.W.R., Shanks, W.C.P. and Seyfried, W. E., Jr. (2019) Pyrite δ34S and Δ33S constraints on sulfur cycling at sublacustrine hydrothermal vents in Yellowstone Lake, Wyoming, USA. Geochim. Cosmochim. Acta 265, 148-162.

Fowler, A. C., Tan, C., Cino, C. D., Scheuermann, P., Volk, M. W. R., Shanks III, W. C., and Seyfried W. E., Jr. (2019) High temperature sublacustrine fumaroles in Yellowstone Lake, Wyoming: Geology,  https://doi.org/10.1130/G45577.1 

Du M., Peng, X., Ta K., Guo Z., Seyfried W. E. Jr., Chou I.-M., Xu H., Liu S., Chen S., Li J. and Bai S. (2019) Iddingsite mud volcanism in subduction zone. Geochemical Perspectives Letters v.11, doi: 10.7185/geochemlet.1916.

Scheuermann, P.P., Tan, C. and Seyfried, W. E., Jr. (2018) Quartz Solubility in the Two-Phase Region of the NaCl-H2O System: An Experimental Study with Application to the Piccard Hydrothermal Field, Mid-Cayman Rise. Geochemistry, Geophysics, Geosystems 19, 3570-3582.

Syverson, D.D., Scheuermann, P., Higgins, J.A., Pester, N.J. and Seyfried, W. E., Jr. (2018) Experimental partitioning of Ca isotopes and Sr into anhydrite: Consequences for the cycling of Ca and Sr in subseafloor mid-ocean ridge hydrothermal systems. Geochim. Cosmochim. Acta 236, 160-178.

Scheuermann P., Syverson D. D., Higgins J. A., Pester N. J., and Seyfried W. E. Jr (2018) Ca isotope systematics at hydrothermal conditions: Mid-ocean ridge vent fluids and experiments in the CaSO4-NaCl-H2O system: Geochim Cosmochim Acta, v. 226, p. 18-35.

Tutolo B. M., Luhmann A. J., Tosca N. J. and Seyfried W. E. Jr. (2018) Serpentinization as a reactive transport process: The brucite silicification reaction. Earth Planet. Sci. Lett. v. 484, p. 385-395.

Syverson D. D., Tutolo B. M., Borrok D. M. and Seyfried W. E. Jr. (2017) Serpentinization of olivine at 300 ⁰ C and 500 bars: An experimental study examining the role of silica on the reaction path and oxidation state of iron. Chem. Geol. v. 475, p. 122-134.

Tan C., Cino C. D., Ding K. and Seyfried W. E. Jr. (2017) High temperature hydrothermal vent fluids in Yellowstone Lake: Observations and insights from in-situ pH and redox measurements. J. Volcanol. Geotherm. Res. v. 343, p. 263-270.

Syverson D. D., Luhmann A. J., Tan C., Borrok D. M., Ding K. and Seyfried W. E. Jr. (2017) Fe isotope fractionation between chalcopyrite and dissolved Fe during hydrothermal recrystallization: An experimental study at 350⁰ C and 500 bars. Geochim. Cosmochim. Acta v. 200, p. 87-109.

Luhmann A. J., Tutolo B. M., Tan C.Y., Moskowitz B. M., Saar M. O. and Seyfried W. E. Jr. (2017) Whole rock basalt alteration from CO2-rich brine during flow-through experiments at 150 ⁰ C and 150 bar. Chem. Geol. V. 453, p. 92-110.

Luhmann A. J., Tutolo B.  M., Bagley B. C., Mildner D. F. R., Seyfried W. E. Jr. and Saar, M. O. (2017) Permeability, porosity, and mineral surface area changes in basalt cores induced by reactive transport of CO2-rich brine. Water Resources Research v. 53, p. 1908-1927.

Luhmann A. J., Tutolo B. M., Bagley B. C., Mildner D. F. R., Scheuermann P. P., Feinberg J. M., Ignatyev K. and Seyfried W. E. Jr. (2017) Chemical and physical changes during seawater flow through intact dunite cores: An experimental study at 150-200⁰ C. Geochim. Cosmochim. Acta v. 214, p. 86-114.

Douglas P. M. J., Stolper D. A., Eiler J. M., Sessions A. L., Lawson M., Shuai Y. H., Bishop A., Podlaha O. G., Ferreira A. A., Neto E. V. S., Niemann M., Steen A. S., Huang L., Chimiak L., Valentine D. L., Fiebig J., Luhmann A. J., Seyfried W. E. Jr., Etiope G., Schoell, M., Inskeep W. P., Moran J. J. and Kitchen N. (2017) Methane clumped isotopes: Progress and potential for a new isotopic tracer. Organic Geochemistry v. 113, p. 262-282.

Syverson Drew D., Luhmann Andrew J., Tan Chunyang, Borrok David M., Ding, Kang and  Seyfried, W. E. Jr. (2017) Fe isotope fractionation between chalcopyrite and dissolved Fe during hydrothermal recrystallization: An experimental study at 350°C and 500 bars. Geochim. Cosmochim. Acta, v. 200, p. 87-109.

Tan C., Ding K. and Seyfried W. E. Jr. (2016) Development and application of a new mobile pH Calibrator (MpHC) for real time monitoring of pH in diffuse flow hydrothermal vent fluids, Marine Technology Journal, v. 50, p. 37-47.

Gulmann L. K., Beaulieu S. E., Shank, T. M., Seyfried, W. E. Jr., Ding K., and Sievert, S. M. (2015) Microbial colonization of freshly exposed basalt surfaces at deep-sea hydrothermal vents at 9˚N on the East Pacific Rise, Frontiers in Microbiology, v. 6, p. 1664-1678.

Pester N. J. and Seyfried W. E. Jr. (2015) Vapor-liquid partitioning of alkaline earth and transition metals in NaCl dominated hydrothermal fluids: An experimental study conducted at 360-460°C. Geochim Cosmochim Acta, v. 168, p.111-132.

Tutolo B. M., Luhmann, A.J., Kong X.-Z., Seyfried W. E., Jr., and Saar M. O. (2015) CO2 sequestration in feldspar-rich sandstone: The importance of solution composition and saturation state. Geochim. Cosmochim. Acta, v. 160, p. 132-154.

Tutolo B. M., Kong, X.-Z., Seyfried, W.E., Jr., and Saar, M.O. (2015) High performance reactive transport simulations examining the effects of thermal, hydraulic, and chemical (THC) gradients on fluid injectivity at carbonate CCUS reservoir scales. International Journal of Greenhouse Gas Control, v. 39, p. 285-301.

Tutolo B. M., Schaen A., Saar M.O., and Seyfried W. E., Jr. (2015) Implications of the redissociation phenomenon for mineral-buffered fluids and aqueous species transport at elevated temperatures and pressures. Applied Geochemistry, v. 55, p. 119-127.

Seyfried W. E., Jr., Pester N. J., Tutolo B. M., and Ding, K. (2015) The Lost City hydrothermal system: Constraints imposed by vent fluid chemistry and reaction path models on subseafloor heat and mass transfer processes. Geochim. Cosmochim. Acta, v. 163, p. 59-79.