纳雍地区龙潭组中段沉积序列模式及沉积体系的初步研究

A Preliminary Study on Depositional Model Sequence and System in Section Ⅱ of Longtan Formation

本文在对贵州省纳雍地区龙潭组中段一剖面详细研究的基础上,划分出八种主要岩相类型,在此基础上,运用马尔可夫链分析法建立了该段的两种主要序列模式,通过沉积序列分析认为:该区龙潭组中段为一受潮汐影响的三角洲体系。

In this paper eight kinds of main lithofacies are divided by detailed study in section Ⅱ of Longtan Formation,Nayong District,Guizhou Province.Based on eight kinds of lothofa- cies,it sets up two kinds of depositional sequence model with Markov chain analysis.Ac- cording to the analysis of this two kinds of sequence model,it is considered that section Ⅱ of Lingtan Formation is a tidally influence delta system.