MAFIC INCLUSIONS AND MINGLING STRUCTURES IN APLITES OF THE OSHURKOV MASSIF (WESTERN TRANSBAIKALIA)

Abstract

Our study of aplite dykes cross‐cutting the Oshurkov basite massif revealed drop‐shaped inclusions of the monzonite composition. These are crystallized drops of basite melts, which show traces of the interaction with the host acidic melt. The Ar‐Ar method was applied to determine the age of the aplites (114.9 Ma for biotite) and the monzonite inclusions (123.3 Ma for amphibole).

Keywords

• oshurkov massif
• mixing of magmas
• mingling
• aplite
• monzonite