SPOROPOLLEN COLOUR AND THE ORGANIC ATTER TYPE OF LOWER CRETACEOUS SOURCE MROCKS IN ZHOUKOU BASIN, HENAN PROVINCE

The Zhoukou Basin is located at eastern part of Henan Province where Lower Cretaceous is well developed. According to the microscopic observations on the sporopollen colour and the organic debris taken from the drilling cores, the evolution of the organic matter can be devided into 4 stages, i·e·immature, mature, highly mature, and over mature.