The Tarim area in this paper refers to the present Tarim Basin and its surrounding mountains,bounded on the north by the Middle Tianshan Mountains,on the south by the Kunlun Mountains,on the west by boundary line of our country,and on the east by the Altun Mountains.It covers an area of more than 1 000 000 km 2 .Based on the quantitative and qualitative data from the study of stratigraphy and petrology of outcrops and well sections,according to the single factor analysis and multifactor comprehensive mappin...