鄂尔多斯盆地晚石炭世孢粉组合

本文报道了鄂尔多斯盆地晚石炭世太原组的孢粉组合,共计68属,148种(类型)。本文描述了其中的9个新种,2个新组合和4个未定种,并建立一个组合带,即 Pseudolyosporaradialis-Gulisporites discersus-Thymospora thiessenit。根据孢粉组合情况,可看出盆地东部更接近于华北,西部则发生区系上的变化。整个孢粉组合可与盆地北缘、华北地区的太原组以及欧美等地区的维斯法期 C-D 和斯蒂芬期的孢粉组合比较。地质时代当属晚石炭世。

MICROFOSSIL ASSEMBLAGES FROM UPPER CARBONIFEROUS IN ORDOS BASIN,NORTHWEST CHINA

This paper is resulted from a systematic study of sporo-pollen of Ordos Basin of Northwest China has been found. Single spore assemblage in the Taiyuan Formation contains abundant Pteridophic and Pteridosperm spores and a few Gymnosperm pollen.11 new species are described. New sporo-pollen taxa include,Punctatisporites gansuensis,Auritulinasporites ningxiaen- sis,Gulisporites discersus,Trivolitcs scabratus,Psomospora anulatus,Gravisporites rugu- laris,Velamisporites breviradidlis,Murospora strialatus,Foveomonoletes foveolatus,Cy. clogranisporites microtriagulus (comb.n.),Cycadopites pachyrrhachis (comb.n.) and Pu- natatisporites sp.,TantiUus sp.,Converrucosisporites sp.,Columnisporites sp.,and Zono- spheridium reticulatoides and Z.granuloides of Acritarchs. There are some differences between spore assemblages of eastern and western parts of Ordos Basin.Western part is characteristic by more abundance of cingulum spores. The age of the microfossil is considered to be of the Late Carboniferous.