四川盆地、准噶尔盆地和燕辽地区三饰叶肢介系统古生物学和生物地层学研究

叶肢介化石是陆相地层对比重要的参照物。三饰叶肢介群，即前人研究中的“自流井真叶肢介群”，主要分布于我国西南、西北、东北等地的石河子阶（相当于巴通阶、卡洛夫阶及牛津阶下部）—玛纳斯阶（相当于牛津阶中上部及钦莫利阶下部），是我国最具标志性的侏罗纪叶肢介组合，具有十分重要的生物地层学意义。本项目拟以三饰叶肢介群最具代表性的三套产出地层，即四川盆地下沙溪庙组—上沙溪庙组、准噶尔盆地西山窑组—头屯河组以及燕辽地区海房沟组/龙门组—髫髻山组的叶肢介为研究对象，结合传统和新兴技术方法，对它们的系统分类和组合序列进行全面的厘定，为四川盆地、准噶尔盆地和燕辽地区中—晚侏罗世地层的对比关系提供重要的生物地层学依据，为我国侏罗纪年代地层框架的完善做出贡献。

Fossil clam shrimp are significantly important for continental stratigraphic correlation. The Triglyptidae fauna, which was called the “Euestheria ziliujingensis fauna” in previous studies, are mainly distributed in the strata of the Shihezi (Bathonian, Callovian, and lower Oxfordian) and Manas (middle-upper Oxfordian and lower Kimmeridgian) stages in southwestern, northwestern and northeastern China. It is the most representative Jurassic clam shrimp fauna in China with very important biostratigraphic significance. This project aims at re-studying and improving taxonomy and faunal successions of the clam shrimp (triglyptids) from the Xiashaximiao and Shangshaximiao formations in the Sichuan Basin, the Xishanyao and Toutunhe formations in the Junggar Basin, and the Haifanggou/Longmen and Tiaojishan formations in the Yanliao area. By combining traditional and newly-rising technologies and methods, the research will provide important biostratigraphic evidence for the stratigraphic correlation of the Middle-Upper Jurassic in the Sichuan and Junggar basins and the Yanliao area, and make a contribution to the improvement of the Jurassic chronostratigraphic framework of China.