浙江萧山小石盖寒武—奥陶系界线地层牙形刺

AN APPROACH TO THE CONODONTS FROM XIAOSHIGAI SECTION AT THE BOUNDARY BETWEEN THE CAMBRIAN—ORDOVICIAN SYSTEMS, XIAOSHAN, ZHEJIANG PROVINCE

丁连生

Ding Liansheng

地矿部华东石油地质研究所, 扬州 2250012

East China Bureau of Petroleum Gology, MGMR

本文根据在浙江省萧山县小石盖剖面中所发现的寒武──奥陶系界线地层的牙形刺化石,建立4个牙形刺化石带。该界线地层位于第2与第3牙形刺带之间,把原浙江石油地质大队划分的界线上提了30.7m.这些化石带均可与国内外相当层位的牙形刺带对比,与国际寒武──奥陶系界线工作组投票决定的界线一致。文中还对牙形刺色标与油气关系进行探讨。

Conodonts discovered from Xiaoshigai section at the boundary between the Cambrian-Ordovician systems of Xiaoshan Region,Zhejiang Province are used to establish 4 con-odont fossil zones.The boundary bed is located between No.2 and No.3 zones,suggesting it is 30.7m upward than that of previously defined.It is considered that those fossil zones are comparable to the conodont zones of the corresponding beds at home,as well as consis-tent with the boundary decided by the International Work Group for the Cambrian-Or-dovician Boundary.Moreover,the color indexes of conodonts and their relationship with oil and gas are also discussed in the paper.

https://doi.org/10.11781/sysydz199402188