Geochemical data from sediments and porewaters of shallow sediment cores from hydrothermal seeps in the Guaymas Basin, Gulf of California

The dataset includes organic carbon and nitrogen isotope data, as well as elemental abundance data from marine sediments that were obtained by push corers from hydrothermal seeps in the modern Guaymas Basin, Gulf of Mexico. Also included are pore water measurements of ammonium concentrations and nitrogen isotopes of dissolved ammonium, as well as sediment temperatures.