苏北盆地泰州组一段重矿物组合特征及物源分析

Characteristics of Heavy Mineral Source Analysis in the 1^(st) Member of Taizhou Formation in Subei Basin

就近年来人们对苏北盆地泰州组古水流流向、物源方向的争论,利用相关性分析和R型因子分析对泰一段重矿物组合特征进行了分析,划分出不同重矿物之间的3种组合方式及确认出相应的母岩类型,并且结合研究区70余口井的砾岩厚度、砾地比等特征,指出苏北盆地泰州组一段主要沉积物源来自盆地西部的鲁苏隆起和南部的通扬隆起,次要物源来自建湖隆起,并且指出来自鲁苏隆起的物源对整个苏北盆地的影响最大。

There were some debates on the directions of paleocurrent and sources in the 1st member of Taizhou Formation of Subei Basin,the characters of heavy minerals were analyzed by correlation analysis and R factor analysis,modes of 3 different mineral compositions were identified and corresponding parent rock types were also determined.In combination with the characteristics of conglomerate thickness,and ratio of its thickness and formation thickness from more than 70 wells,it is pointed out that the major deposits in the 1st member of Taizhou Formation are from Lusu uplift in west and Tongyang uplift in the south of the basin,the second source is from Jianhu uplift,it is also pointed out that the source from Lusu uplift has the biggest affect on Subei Basin.