摘要
哈密坳陷早三叠世古生物记录甚少。从哈参 2井 80 1.5 m- 16 39.5 m井段的泥岩中发现了较为丰富的孢粉化石 ,并可划分为两个组合 :L imatulasporites- Cyclogranisporites- Alisporites组合和 L imatulasporites- L undbladis-pora- Taeniaesporites组合。根据孢粉组合特征及其对比 ,两组合的地质时代应属早三叠世 。
Forty six species of fossil spores and pollen assigned to thirty nine genera are recorded from 6 samples of Borehole HC2 in the Hami Depression, Xinjiang, Northwest China. Two sporopollen assemblages, Limatulasporites Cyclogranisporites Alisporites (of the Jiucaiyuan Fm.) and Limatulasporites Lundbladispora Taeniaesporites Assemblages (of the Shaofanggou Fm.), have been proposed. The present assemblages are comparable with those from the Jiucaiyuan and Shaofanggou Formations located on the south margin of the Junggar Basin and the Early Triassic assemblages from Australia and Western Canada, suggested an Early Triassic age for the Jiucaiyuan and Shaofanggou Formations in the Hami Depression. The discovery of the sporopollen assemblages from Borehole HC2 provides paleontologic evidence for the existence of the Lower Triassic strata in the Hami Depression, Xinjiang.
出处
《地层学杂志》
CSCD
北大核心
2002年第4期259-263,271,T002,共7页
Journal of Stratigraphy
基金
高等学校骨干教师资助计划 [科技司 (2 0 0 0 ) 65号 ]
中国石油天然气集团公司吐哈油田分公司科研项目资助
