山东西部单县地区二叠纪奎山组砂岩沉积环境探讨

Study on the Sedimentary Environment of Permian Kuishan Sandstone in Shanxian County in Western Shandong Province

摘要:

针对山东西部二叠纪奎山组厚层砂岩沉积环境尚存争议这一问题，该文通过在单县地区钻孔系统采样、磨片与室内电子探针测试微量元素等手段，对奎山组砂岩进行成因机制探讨。研究发现，奎山组砂岩其形成环境较复杂，不能简单用某个环境解释，其沉积时受到频繁的海侵海退影响，综合分析其应形成于滨海近岸带和三角洲环境。在此基础上，结合实验及沉积学等方法，分析了海水对奎山组砂岩影响变化，将奎山组砂岩划分出4个沉积旋回，建立了成因模式。

Abstract:

In view of the dispute about the sedimentary environment of thick layer sandstones in Kuishan formation of the Permian in western Shandong province, by means of sampling, grinding and indoor electron probe microelements in single county area, genetic mechanism of Kuishan sandstone has been studied. It is found that the environment of Kuishan sandstone is complex, which can not be explained by using a certain environment simply. Its sedimentary affected by frequent transgressive regressive. After comprehensive analysis, it is regarded that the environment should be formed in the coastal inshore belt and delta. On this basis, combining with experiments and sedimentology, the influence of seawater to Kuishan sandstone has been analyzed. Kuishan sandstone has been divided into four sedimentary cycles, and the genesis model has been established.