黔北金沙地区上二叠统龙潭组古沉积环境研究

The Research of Sedimentary Palaeoenvironment of Longtan Formation of Upper Permian in Jinsha,Southern Guizhou

沉积岩中的各种元素的含量及相对含量对沉积时的古环境有很好的指示作用。本文以金沙参1井为例,通过对该参数井的岩芯样品的试验结果进行分析,表明龙潭组下段为炎热潮湿的沉积环境;上段古气候温度相对较低;沉积早期水体深度较大,直至晚期水体逐渐变浅;龙潭组沉积环境整体呈缺氧还原环境。

The contecti and the relative contents of some elements in the sedimentary rocks can well indicated the palaeoenvironment.The result shows that the sedimentary period of lower Longtan Formation is hotter an more humidity,and the depth of water was deeper.The sedimentary palaeoenvironment was reductive environment.