ARTIFICIAL HEAVY MINERAL ANALYSIS: APPLICATIONS TO THE STUDY OF SEDIMENTARY FACIES AND PALAEOGEOGRAPHY,WITH AN EXAMPLE FROM LOW-GRADE METAMORPHIC SUCCESSIONS OF THE WANGJIASHAN FORMATION IN THE CHANGBA DISTRICT,CHENGXIAN,GANSU

This paper deals with the theory and method of artificial heavy mineral analysis in the lowgrade metamorphic successions. The study of the terrigenous clastic rocks in the low-grade metamorphic successions of the Wangjiashan Formation in the Changba district, Chengxian County, Gansu Province shows that artificial heavy mineral analysis will be of great significance in palaeogeographic reconstruction.