滇西南哀牢山造山带代表古特提斯洋的分支洋盆或弧后盆地。对哀牢山造山带的研究有助于完善古特提斯多岛洋的演化模式。在过去几十年中，对哀牢山造山带的研究取得了重大的进展，但绝大部分研究侧重于蛇绿岩和花岗岩等岩浆岩的研究，对深水沉积的研究相对较少。关于哀牢山洋盆演化历史的不同观点的分歧也在于缺少晚石炭世-早二叠世的深水沉积记录。 前期研究工作发现，在晚三叠世底砾岩的燧石质砾石中含有不同时代的放射虫化石。本项目拟针对滇西南哀牢山造山带古特提斯演化中存在的争论，运用"造山带地层学"和"沉积大地构造学"研究思路和方法，以哀牢山带晚三叠世歪古村组底部砾岩中的含放射虫燧石质砾石为研究对象，开展古物学、沉积地质学、地球化学、沉积大地构造学研究。确定其时代及其所反映的沉积构造背景，探讨哀牢山带的古特提斯演化，以期为深入了解古特提斯多岛洋格局提供更多依据。

AilaoShan suture represents a branch of the Paleo-Tethys ocean or a back-arc basin. The research on Ailaoshan suture is useful to promote the evolution model of the Paleo-Tethyan archipelagic ocean. Plenty of researches were done on Ailaoshan suture in the past decades. However, most researches focus on ophiolite and granite, relatively rare studies on abysmal sediments. Crucial point of different overviews on evolution of Ailaoshan suture is the lack of abysmal sedimentary records during Late Carboniferous to Early Permian. Radiolaria-bearing chert pebbles were discovered in Late Triassic conglomerate. In this program, a combination of Palaeontology, sedimentology, geochemistry and sedimentary tectonic approaches will be carried out to identify the depositional ages, depositional environments and tectonic settings of these Triassic chert pebbles. On the basis of geological data and regional comparison, we will discuss the evolution of Ailaoshan suture, and promote the evolution model of Paleo-Tethyan archipelagic ocean.