How many martian noble gas reservoirs have we sampled

The most precise estimates of the elemental and isotopic composition of the martian atmosphere come from martian meteorites, in particular EETA79001. These meteorites also provide substantial evidence for at least one additional component, presumably associated with the martian interior. This evidence includes noble gases within Chassigny that are isotopically and elementally distinct from either the terrestrial or martian atmospheres, and low‐δ15N and low 40Ar/36Ar components within EETA79001. Much of the martian meteorite data can be explained by simple mixing of these two components, with some elemental fractionation generated by adsorption processes. There is no compelling evidence for additional components, although there are several hints within the data.