Geofluids provides an international forum for original research into the role of fluids in mineralogical chemical and structural evolution of the Earth's crust. Its explicit aim is to disseminate ideas across the range of sub-disciplines in which Geofluids research is carried out. To this end authors will be encouraged to stress the transdisciplinary relevance of their research and to make their work as accessible as possible to readers from other sub-disciplines. Geofluids emphasizes both chemical and physical aspects of subsurface fluids throughout the Earth's crust (although excluding silicate melts). Geofluids spans studies of groundwater terrestrial or submarine geothermal fluids basinal brines petroleum metamorphic waters or magmatic fluids but requires relevance to processes that are significant on a geological time scale. Authors are encouraged to submit articles that describe theoretical or observational studies explore the geologic geochemical or geophysical attributes of subsurface fluids quantify the geologic controls on permeability geochemical transport and heat transport or document applied aspects of crustal fluid behaviour.