| 乔卫涛,陈仁,胡歆睿,吕留彦,周武.贵州开阳地区澄江组第二段砂岩粒度分析与沉积环境[J].贵州地质,2020,37(1):59-65 |
| 贵州开阳地区澄江组第二段砂岩粒度分析与沉积环境 |
| Grain-size Analysis and Depositional Environment of the Second Member of Chengjiang Formation at Kaiyang Area of Guizhou Province |
| 投稿时间：2019-08-28 |
| DOI： |
| 中文关键词: 澄江组 粒度分析 沉积环境 贵州开阳 |
| 英文关键词:Kaiyang area Grain-size statistical analysis the second section of Chengjiang Formation Fluvial facies |
| 基金项目:中国地质调查局区域地质调查项目:贵州1∶5万开阳、花黎、瓮安、羊昌、龙岗、牛场幅区域地质矿产调查，项目编号:12120114072501。 |
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| 中文摘要: |
| 对开阳地区金中背斜及翁昭地区澄江组第二段砂岩的进行了粒度分析，得出了其粒度参数特征。以粒度参数为基础，根据萨胡粒度判别函数、离散图解及粒度概率累积曲线及Sr/Ba测试分析，显示其沉积环境为河流相沉积。结合砂岩岩石学特征综合判断金中地区为辫状河沉积而翁昭地区为曲流河沉积。整体证实了贵州南华系澄江晚期古地理格局为北西高，南东低的特征。 |
| 英文摘要: |
| This study gets the granulometric parameters of the sandstone of the second member of Chengjiang Formation in the Jinzhong anticline and Wengzhao area of Kaiyang area from the grain-size statistical analysis.Base on the granulometric parameters,the author indentifys that the depositional environment of the second member of Chengjiang Formation in the area was Fluvial facies through Sahu discriminant function ,Friedman discrete gragh,cumulative frequency curves and the ritio of Sr and B elements.The grain-size statistical analysis and petrology of the sandstone shows the environment of Jinzhong area is Braided river and the environment of Wengzhao area is Meandering river.The study conforms the palaeogeographic pattern of late Chengjiang of Nanhua system at Guizhou is Northwest high and Southeast low. |
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