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However, this system is considered more stable than both the K-Ar and Rb-Sr dating methods.

This fact, combined with advances in precision of Ca mass spectrometry, makes K-Ca dating a viable option for igneous and metamorphic rocks containing little to no zircon.

As such, being able to assume the initial The primary disadvantage to K-Ca dating is the abundance of calcium in most minerals; this dating method cannot be used on minerals with a high preexisting calcium content, as the radioactively added calcium will increase calcium abundance in the sample only very slightly.The concept's initial mathematical formulation was presented in a seminal paper by Martin H.Dodson, "Closure temperature in cooling geochronological and petrological systems" in the journal Contributions to Mineralogy and Petrology, 1973, with refinements to a usable experimental formulation by other scientists in later years.The age that can be calculated by radiometric dating is thus the time at which the rock or mineral cooled to blocking temperature.These temperatures can also be determined in the field by comparing them to the dates of other minerals with well-known closure temperatures.

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