流体包体很小,往往是显微级的,大量流体是晶体在流体中生长时被捕获的。要作为地质年代记时计,就必须了解它的成因,而且在包体封口之后没有物质的得失。在晶体生长和后来的破裂又愈合的过程中,包体的捕获往往不止一期。但是,为了年代测定的目的,只要各个包体形成于一个相对短的时间间隔内, Fluid inclusions are small, often microscopic, and large amounts of fluid are captured as crystals grow in the fluid. To be a chronology of geochronology, one must understand its cause, and there is no material gain or loss after the closure of the pack. In the process of crystal growth and later rupture and healing, the inclusion of the inclusions often more than one period. However, for the purpose of dating, as long as the individual inclusions are formed in a relatively short time interval,