| 云南寻甸县灯影组第三段沉积环境分析 |
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| 引用本文： | 郭太堂,余杰,张沥元,何佳乐.云南寻甸县灯影组第三段沉积环境分析[J].四川地质学报,2020,40(1):7-10. |
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| 作者姓名： | 郭太堂 余杰 张沥元 何佳乐 |
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| 作者单位： | 武警黄金第九支队,海口570100;武警黄金第九支队,海口570100;武警黄金第九支队,海口570100;武警黄金第九支队,海口570100 |
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| 摘 要： | 寻甸地区位于上扬子地台,该区灯影组三段发育了一套以白云岩夹粉砂岩泥岩为主的沉积岩层。通过对摩洛河剖面岩石学特征及沉积相的研究,结合前人的研究成果,认为该区灯影组三段可分为三个岩性段:下部以细粒石英砂岩、泥岩为主;中部以砂屑白云岩为主,夹少量石英细砂岩和泥质粉砂岩为主;上部以泥晶灰岩、泥质灰岩夹钙质泥岩钙质粉砂岩为主。岩层中主要发育水平层理和平行层理;并且认为研究区灯影组三段地层发育在碳酸盐台地一陆表海环境中,从底到顶可识别出潮坪浅滩相、瀉湖相和开阔台地相的沉积。总体上为海退一海侵的沉积旋回。
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| 关 键 词： | 寻甸县 灯影组三段 沉积环境 |
On Sedimentary Environment of the Third Member of the Dengying Formation in Xundian,Yunnan |
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| GUO Tai-tang,YU Jie,ZHANG Li-yuan,HE Jia-le.On Sedimentary Environment of the Third Member of the Dengying Formation in Xundian,Yunnan[J].Acta Geologica Sichuan,2020,40(1):7-10. |
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| Authors: | GUO Tai-tang YU Jie ZHANG Li-yuan HE Jia-le |
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| Institution: | (The 9th General Gold Party,Chinese People’s Armed Police Force,Haikou 570100) |
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| Abstract: | The Xundian area lies in the Upper Yangtze platform. The Third Member of the Sinian Dengying Formation in this area is composed of dolomitite interbeded with siltstone and mudstone. The Third Member of the Dengying Formation based on the Moluohe profile may be divided into three lithologic units such as ganister and mudstone in the lower part, dolarenite interbeded with a small amount of ganister and politic siltstone in the middle part and micrite, argillaceous limestone and calcareous siltstone in the upper part. They are characterized by the development of horizontal bedding and parallel bedding. They were developed in a carbonate platform or epicontinental sea environment and may be divided into tidal flat shoal facies, lagoon facies and open platform facies ascendingly which forms a regressive-transgressive sedimentary cycle. |
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| Keywords: | The Third Member of the Sinian Dengying Formation sedimentary environment Xundian |
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