Potassium 40 dating accuracy

09-Oct-2019 07:51

This imprecision (and inaccuracy) is transferred to the secondary minerals used daily by the Ar age equation will become continually more refined allowing much more accurate and precise ages to be determined.Because the J value is extrapolated from a standard to an unknown, the accuracy and precision on that J value is critical.This flux is known as the 'J' and can be determined by the following equation: As the table above illustrates, several "undesirable" reactions occur on isotopes present within every geologic sample.These reactor produced isotopes of argon must be corrected for in order to determine an accurate age.

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The primary standard must be a mineral that is homogeneous, abundant and easily dated by the K/Ar and Ar methods.Potassium can be mobilized into or out of a rock or mineral through alteration processes.