青海囊谦第三纪盆地沉积学特征

摘要

The Nangqian basin locates at the eastern Tibet-Qingha i plateau and is on a l ow study level at present because of its grim environment. The authors describe in details its features such as the surface form, petrologic features, deposi tional system , palaeo-flow etc. Moreover, the authors point out that the sedim entary environment is p roximal and quickly accumulated. All provinces disclose the development of the basin and the activity of Zhaqu Fault which controls the basin development.%囊谦盆地位于青藏高原东部，研究程度较低，倘处于地层格架建立阶段。在野外 工作的基础上全面叙述了地层的岩相特征、沉积体系、古流向等。指出盆地沉 积环境为近源、快速堆积环境，沉积体系不对称分布且相变迅速，物源区单一性，古流向的 变化表明了盆地的不断加大及控制盆地的扎曲断裂的持续活动性。