新疆准噶尔盆地东缘下石炭统滴水泉组孢粉组合

A Lower Carboniferous sporo-pollen assemblage from the Dishuiquan Formation on the eastern margin of the Junggar Basin, Xingjiang

新疆准噶尔盆地东缘克拉美丽地区双井子剖面滴水泉组孢粉组合中有孢粉化石２９属３０种，具环孢占优势，含量为５７．９％，其中Ｃｒａｓｓｉｓｐｏｒａ（２３．６％）、Ｓｔｅｎｏｚｏｎｏｔｒｉｌｅｔｅｓ（１４．３％）的含量最高；无环孢居次，含量为３４．５％，以Ｐｕｎｃｔａｔｉｓｐｏｒｉｔｅｓ（１２％）和Ｅｅｉｏｔｒｉｌｅｔｅｓ（７．１％）为主。地质时代为早石炭世晚期，可能属韦宪期早期，大致相当于甘肃靖远臭牛沟组下段Ⅰ孢子组合带和西欧的Ｐｕ孢子组合带。当时为亚热带温暖湿润气候。

One sporo-pollen assemblage is studied in the paper, which contains 30 species referred to 29 genera from the Lower Carboniferous Dishuiquan Formation of Shuangjinzi section, in the Kelameili area of the eastern margin of the Junggar Basin,Xinjiang. In the assemblage, account of zonales for 57. 9%, represented by Crassispora (23. 6 % ), Stenozonotriletes (14. 3 % ) and Lophozonotriletes (3. 6 % ); azonoles constitute to 34. 5%, mainly composed of Punctatispordes (12% ) and Leiotriletes (7.1% ). It is suggested that the geologic age of the assemblage may be late Early Carboniferous, roughly corresponding to the first spore assemblage zone of the lower Chouniugou Formation in Jinyuan, Gansu, and to Pu spore assemblage zone of western Europe. The palaeoclimate was subtropic warm and humid.