Experimental data on intrusion of argon into muscovite, in relation to geochronology

Abstract

Experimentally, anomalously large quantities of argon may be captured by natural muscovite, at 500°C and over, and at relatively high partial pressures of argon in the system. Argon may be captured likewise by growing muscovite and held firmly therein, in certain crystallostructural positions. This evidence and other data impose definite limitations on reliability of the K-Ar geochronology, particularly on selection of test materials for the method. -- V .P. Sokoloff.