摘要
安顺组是位于大冶组和关岭组之间的一套白云岩组合,本文将其分为三个岩性状,重点介绍了沉积成岩白云岩的特征,根据岩石学和沉积学的相关原理分析了安顺组的沉积环境及其演变,明确提出该组为局限碳酸盐台地沉积,至下而上经历第一段的台地边缘浅滩,到第二段的潮间至潮上带,再到第三段的潮上带的演变过程,从而形成黔中碳酸盐台地及其前缘缓坡的沉积格局。
Anshun formation is dolomite association between Dayi formation and Guanling formation,it＇s divided into 3 lithologies,and the sedimentary dolomite is introduced as the key point.According to the relevant theory of petrology and sedimentation,the sedimentary environment and its evaluation of Anshun formation is studied,this formation is thought to be the limited carbonate platform sediment.From the bottom to the top,it experienced the evaluation： the platform margin shoal in the first stage,the tidal zone to supratidal zone in the second stage and the supratidal zone in the third stage,then the Qianzhong carbonate platform and its sedimentary situation of trailing edge gentle slope is formed.
出处
《贵州地质》
2011年第3期182-185,共4页
Guizhou Geology
关键词
安顺组
白云岩
沉积环境
局限碳酸盐台地
平坝
贵州
Anshun formation
dolomite
sedimentary environment
limited carbonate platform
Pingba
Guizhou
