早侏罗世Toarcian期发生过一次全球性大洋缺氧事件，极大的影响了当时古海洋、古气候和古生态条件，目前地学界对该事件的形成过程与成因机制仍存在较大争议。位于青藏高原北部的羌塘盆地地处特提斯域东段，是连接西特提斯及东南亚特提斯的关键区域，盆地南缘广泛发育有连续的早侏罗世沉积，其黑色岩系层段发育有空间上集缺氧事件可能诱因于一体的各种地质素材，为开展缺氧事件及动力机制研究提供了绝佳机会。研究工作拟以羌塘盆地南部早侏罗世曲色组黑色岩系作为主要研究对象，通过系统的沉积学、碳同位素地层学、有机地球化学和元素地球化学分析，明确羌塘盆地T-OAE发生的地层层位，查明它的沉积和地球化学响应特征，恢复其形成的古海洋条件；同时，开展同时代喷发的火山岩和同层段自生碳酸盐岩结核研究，梳理它们与T-OAE成因关联及协同演化关系，探讨T-OAE在羌塘盆地发生、发展过程，为T-OAE成因机制研究寻找关键地质证据。

During the early Toarcian (early Jurassic), a well-known oceanic anoxic event took place all over the world, which dramatically influenced the paleoceanography, paleoclimate and paleoecology. However, there still are more divergences on its development process and forming mechanism. Located in the northern Qinghai-Tibetan Plateau and eastern tectonic realm of Tethys, Qiangtang basin provides vital links between West Tethys and SE Asian Tethys. A continuous early Jurassic deposition is well preserved along the south basin margin, and various geological factors for the most likely culprit of the anoxic event occur within these black shales. All this can be served as best conditions for analysis Toarcian Oceanic Anoxic Event features and its forming mechanism. This project will focus on these early Jurassic black shales sequence of Quse Formation, and research stratigraphic and sedimentary characteristics of T-OAE in Qiangtang basin, then reconstruct its paleoceanogrphic condition by studying of sedimentology, carbon isotope stratigraphy, organic geochemistry and elemental geochemistry. Additionally, the project will also conduct parallel research on contemporaneous volcanic rocks and authigenic carbonate concretions preserved in these early Jurassic black shales, and try to tease out genetic relationship and coevolution between them. All this effort will be combined together to explore formation and evolution pattern of T-OAE in Qiangtang Basin, and unravel key geological evidence to forming mechanism.