Pb pb isochron dating

(For brevity's sake, hereafter I will refer to the parent isotope as ).

In addition, it requires that these measurements be taken from several different objects which all formed at the same time from a common pool of materials.

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The X-axis of the graph is the ratio of in a closed system over time.This will be discussed in more detail in the section on Gill's paper below.The "generic" method described by Gonick is easier to understand, but it does not handle such necessities as: (1) varying levels of uncertainty in the X- versus Y-measurements of the data; (2) computing an uncertainty in slope and Y-intercept from the data; and (3) testing whether the "fit" of the data to the line is good enough to imply that the isochron yields a valid age.Age "uncertainty" When a "simple" dating method is performed, the result is a single number.There is no good way to tell how close the computed result is likely to be to the actual age.However, for metamorphic carbonates, PbPb isochron ages of marbles generally reflect faithfully the time of metamorphic recrystallisation.

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