The Laser Microprobe Dating Drives K-Ar Geochronology into A New Milestone at the End of 20th Century
MU Zhiguo · Acta Scicentiarum Naturalum Universitis Pekinesis · 2001
K\|Ar age dating method is facing a serious challenge to its application due to that both Ar loss and Ar excess are widespread found even though it has been undergoing 50 years.In the latest few years of the 20th century,studies on K\|Ar geochronology have been pushing on a new step as a sign of method perfected and precision enhanced.High precision and high resolution 40 Ar/ 39 Ar dating,can use in both micro\|area and a single grain,extends dating limit into the historical realm.Applied range of K\|Ar geochronology is getting bigger and bigger due to fine analytical techniques while solved geological problems are getting wider and wider.