摘要
本文在对西秦岭4条剖面进行生态地层研究的基础上,通过生态地层对比揭示了三叠纪秦岭海盆进化的一般模式和海平面变化的细节。古生物地理分析表明:三叠纪时,秦岭北侧属于温带生物区系,秦岭南部属于热带-亚热带生物区系。秦岭各区与邻区之间生物相似性系数研究表明,秦岭三叠纪海盆具有一定的宽度和深度,但不是宽广的大洋。
Based on ecostratigraphic study of four sections in West Qinling, several fossil communities are established and their environmental settings reconstructed. Ecostratigraphic subdivision and correlation of four sections transversing West Qinling have revealed both the general pattern of basin evolution and details of eustatic vibration. According to the paleobiogeographic analysis, the southern region of Qinling belonged to tropical - subtropical zone, while the northern region of Qinling to temperate zone in Triassic. The study of the similarity coefficients at species level among various regions of Qinling, Yangtze and North China shows that the Triassic sea of Qinling had considerable wedth and depth, but not a vast ocean.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
1992年第3期345-352,共8页
Earth Science-Journal of China University of Geosciences
基金
国家自然科学基金项目"川
甘
青扬子地台北边缘印支期生态地层学研究"的部分成果
关键词
三叠纪
古海盆
生态地层
古地理
Triassic, ancient sea basin, ecostratigraphy, paleobiogeography, Qinling area.
