论浙江北部晚二叠世Taihuella和Reichelina动物群及其地质意义

ON TAIHUELLA AND REICHELINA FAUNA FROM UPPER PERMIAN AND THEIR GEOLOGICAL SIGNIFICANCE IN NORTH ZHEJIANG

本文利用古生态研究方法对龙潭组的Taihuellafauna和长兴组的Reichelinafauna等动物群在壳体特征变异和演化阶段上进行了系统的研究与探讨，发现该动物群受地壳运动所造成古环境变迁和沉积岩相的变化所控制，阐述了浙北类在发展上的某些规律，为建立生物系统演化序列和地层沉积模式及准确地划分与对比地层等方面提供了依据。

At the border round of Anhui, jiangsu and Zhejiang provinces, the permian strata contri bllte widely, the Fusulina fossils are quite abundant in the lower permian Gufung formation and upper Permian Lungtan and Changxing formation. From top to bottom, they were (6) Palaeofusulina zone, (5)Staffella zone and (4) Gallowaginella -reichelina zone in Changxing formation, (3) Taihuella zone and (2) Codonfusiella zone in Lungtan coal series, and (1 ) Neomisellina zone in Gufung formation. The Fusulinids in north Zhejiang have played a great important role in the geological and relative stratigraphy. This paper deals with Taihuella and Reichelina mainly by the method of palaeoecology.The Taihuella, Reichelina and Codonofusiella were associated in Lungtan formation, but no taihuella was found in Changxing formation. So far, the Taihuella is only restricted to Lungtai coal series, and its acme-zone lied at the top of Lungtan formation. The reichelina ranged from Lungtan formation to Changxing formation and its acme-zone belongs to the bottom of Changxing formation.The distinction and development of Fusulina in north Zhejiang is thought to be mostly connected with tectonism. The Dongwu movement was a main Permian crustal movement in Zhejiang province. It attributed to the loss of upper member of Lungtan formation and of middle-lower member of Changxing formation at the criterion strata profile in coal area of Zhejiang province.