关键词: 年轻火山, K-Ar, 40Ar-39Ar, 测年

Abstract:

The key technique to determine the ages of young volcanic rocks by K-Ar and 40Ar- 39Ar methods is how to avoid effects of excess argon and to raise the relative component of radiogenic argon. It is possible to obtain the ages of volcanic activity in the order of tens of thousand to thousands years by distinguishing compositions with excess argon in volcanic rocks and through selecting high-K materials as measuring factors and rational gassing in the experiment processes. Examples are as follows: Usin

Key words: Young volcanic rocks, K-Ar, 40Ar- 39Ar, Dating