gasinclusions
Gas inclusions are microscopic pockets of gas trapped within a mineral or rock during its formation or subsequent alteration, distinguishing them from liquid or solid inclusions. They occur in a variety of hosts including diamonds, quartz, olivine, calcite, and even ice; primary inclusions form with the host crystal, while secondary inclusions can form later along fractures or deformation zones.
Formation typically involves entrapment of gas from a vapor-rich melt or gas phase during crystallization; post-entrapment
Analytical methods include polarized light microscopy for morphology, microthermometry to release gases, and spectroscopic techniques such
Interpretation requires careful consideration of sealing and alteration effects, and uncertainties are tied to small sizes