四川盆地侏罗纪地层锆石年代学研究现状与展望

Present Situation and Prospect of Zircon Geochronology of Jurassic Strata in the Sichuan Basin

本文通过收集近十年以来盆地内部侏罗纪地层锆石研究资料进行分析讨论,最新的锆石研究资料表明部分侏罗纪地层同以往分布时代认知存在冲突,可能需要重新厘定。此外,四川盆地是重要的恐龙化石产地,对含恐龙化石层位的年代学研究可以为恐龙的演化提供有效的证据。需要补充地层相应的岩石学资料,加强对地层中同时代沉积的火山岩(如凝灰岩)的关注,以期获得更加可靠的资料。

The latest zircon geochronological data on the Jurassic strata in the Sichuan basin come into conflict with the previous cognition.The Sichuan basin is an important place of Dinosaur fossils.The geochronological study of Dinosaur fossils-bearing strata can provide effective evidence for Dinosaur evolution.In order to obtain more reliable data,it is necessary to supplement the corresponding petrologic data and pay more attention to the contemporaneous volcanic rocks(such as tuff).