| 四川射洪县明星镇上侏罗统蓬莱镇组岩相及古气候意义 |
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| 引用本文： | 周勇,李祥辉,孙勇.四川射洪县明星镇上侏罗统蓬莱镇组岩相及古气候意义[J].四川地质学报,2011,31(2):142-144. |
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| 作者姓名： | 周勇 李祥辉 孙勇 |
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| 作者单位： | 1. 成都理工大学沉积地质研究院,成都,610059
2. 南京大学地球科学与工程学院,南京,210093 |
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| 基金项目： | 国家重大基础研究发展规划项目(973)课题"中国白垩纪重要时期的古气候重建(2006CB701401)" |
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| 摘 要： | 对四川省射洪县"硅化木国家地质公园"博物馆剖面的上侏罗系蓬莱镇组进行岩相分析、观察研究表明,蓬莱镇组以紫色、紫灰色、灰绿色泥岩、细粒长石(石英)砂岩为主,含粉砂岩,可以识别划分出湖泊、河流和铁质氧化土壤三种岩相类型.其中,湖泊相可分辨出深湖、滨～浅湖亚相,河流相,并可进一步识别为河道、天然堤、决口扇、洪泛平原(/河漫滩)四种亚相.根据这些岩相和亚相的气候指示,结合下伏硅化木层位的岩相特征,认为研究区在蓬莱镇组沉积期属于半干旱气候.
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| 关 键 词： | 古气候 岩相 蓬莱镇组 射洪县 |
Sedimentary Facies and Its Paleoclimate Significance for the Upper Jurassic Penglaizhen Formation in Mingzhu Town, Shehong, Sichuan |
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| ZHOU Yong,LI Xiang-hui,SUN Yong.Sedimentary Facies and Its Paleoclimate Significance for the Upper Jurassic Penglaizhen Formation in Mingzhu Town, Shehong, Sichuan[J].Acta Geologica Sichuan,2011,31(2):142-144. |
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| Authors: | ZHOU Yong LI Xiang-hui SUN Yong |
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| Institution: | 1-Institute of Sedimentary Geology,Chengdu University of Technology,Chengdu 610059;2-College of Earth Science and Engineering,Nanjing University,Nanjing 210093) |
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| Abstract: | Study of sedimentary facies indicates that the Penglaizhen Formation in the National Woodstone Geopark,Shehong is composed of purple,purplish gray,grayish green mudstone,fine-grained arkose and siltstone which may be divided into lacustrine,fluvial facies and iron oxide soil.The lacustrine facies may be subdivided into deep lake,coastal and shallow lake subfacies and fluvial facies may be subdivided into channel,levee,crevasse-splay,floodplain subfacies.The sedimentary facies indicates a semiarid climate. |
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| Keywords: | paleoclimate sedimentary facies Penglaizhen Formation Shehong County |
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