贵州关岭动物群时代的牙形石地层证据

北京大学学报（自然科学版）

贵州关岭动物群时代的牙形石地层证据

孙作玉, 郝维城, 江大勇

北京大学地质学系，北京，100871

收稿日期:2001-08-08 出版日期:2003-01-20 发布日期:2003-01-20

Conodont Stratigraphic Evidence for the Age of the Guanling Fauna, Guizhou Province, China

SUN Zuoyu, HAO Weicheng, JIANG Dayong

Department of Geology, Peking University, Beijing, 100871

Received:2001-08-08 Online:2003-01-20 Published:2003-01-20

摘要/Abstract

摘要： 通过对关岭动物群产出层位瓦窑组及其下伏地层竹杆坡组采集到的牙形石样品进行处理，得到典型牙形石带分子Paragondolella polygnathiformis和Paragondolella tadpole。经对比，可知竹杆坡组顶部和瓦窑组的时代为晚三叠世卡尼期中期或晚期，而不是中三叠世拉丁期，从而表明关岭动物群的时代是晚三叠世中-晚卡尼期。

关键词: 贵州关岭动物群, 瓦窑组, 竹杆坡组, 卡尼期

Abstract: Samples collected from the Wayao Formation, which yields the Guanling Fauna, and the underling formation, the Zhuganpo Formation, were treated for conodont analysis. The study result shows that two conodont zones, Paragondolella polygnathiformis-P.tadpole Assemblage Zone and the P. polygnathiformis Zone can be recognized. Comparing with the international and domestic related information, a conclusion can be drawn that their epoch should belong to the Middle or Late Carnian of the Late Triassic. So the final result indicates that the age of the Guanling Fauna belong to the middle Carnian of the Late Triassic, maybe the late Carnian, not to the Ladinian of the Middle Triassic.

Key words: the Guanling Fauna in Guizhou, Wayao formation, Zhuganpo formation, Carnian

中图分类号:

孙作玉, 郝维城, 江大勇. 贵州关岭动物群时代的牙形石地层证据[J]. 北京大学学报（自然科学版）.

SUN Zuoyu,HAO Weicheng,JIANG Dayong. Conodont Stratigraphic Evidence for the Age of the Guanling Fauna, Guizhou Province, China[J]. Acta Scientiarum Naturalium Universitatis Pekinensis.

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https://xbna.pku.edu.cn/CN/Y2003/V39/I1/118