English: Fluorine cycle schematic: F fluxes (Schlesinger et al 2020) are in Tg/yr, reservoir data (Rudnick et al 2014) is in mg/kg. The major mechanisms that mobilize fluorine are chemical and mechanical weathering of rocks. Major anthropogenic sources also include industrial chemicals and fertilizers, brick manufacturing, and groundwater extraction. Fluorine is primarily carried by rivers to the oceans, where it can have a residence time of about 500,000 years. Fluorine can be removed from the ocean by deposition of terrigenous or authigenic sediments, or subduction of the oceanic lithosphere.