EARLY CRETACEOUS SPORE AND POLLEN ASSEMBLAGES OF KAILU BASIN, NEI MONGOL

The Liaohe Oil Company has more than 150 wells of different kinds drilled in the Kailu Basin, and the first well, Lushen 1 was drilled there in 1987. The author has made laboratory analysis on more than 1500 core samples from more than 20 wells, obtained a large quantity of sporopollen fossils with first hand data accumulated. In the study, systematic integration and research has been done on the palaeobiological data for the recent 20 years, three sporopollen assemblages of the Early Cretaceous have been established with their features listed, in ascending order they are the cicatricosisporites-cancovissimisporites-Classopollis Assemblage of the Jiufutang Formation,the Cicatricosisporites-Abdiverrucospora-Piceaepollenites Assemblage of the Shahai Formation,and the Cicatricosisporites-Laevigatosporites-Pilosisporites-Asteropollis Assemblage of the Fuxin Formation.In addition, comparisons are made with foreign and other domestic sporopollen assemblages. Based on the above, the Early Cretaceous biostratigrapgic sequence and geological datings have been established in the study area,and they have important significances for the hydrocarbon exploration and the studies on the Cretaceous sequence, biota and age assignment.

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Clc Number:

Q913.84