| 四川义敦地区早中三叠世义敦群岩相古地理 |
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| 引用本文： | 戴宗明,孙传敏.四川义敦地区早中三叠世义敦群岩相古地理[J].四川地质学报,2008,28(3):178-183. |
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| 作者姓名： | 戴宗明 孙传敏 |
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| 作者单位： | 成都理工大学地球科学院,成都,610059 |
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| 基金项目： | 中国地质调查局科研项目 |
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| 摘 要： | 经过对四川义敦地区中下三叠统党思组、列衣纽涉及到的9幅1：5万区调图幅和18条剖面、沉积等厚线的综合分析研究，认为该区主体部分在早中三叠世沉积环境经历了深海盆地海底扇中-外扇相→深海盆地浊流相→下斜坡相→上斜坡相→外陆棚相→外陆棚-上斜坡相的演化。岩相古地理图上的沉积等厚线显示，该区有上麻绒盆地和义敦盆地等2个沉积中心，在拉纳山一带还出出现有拗陷盆地。
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| 关 键 词： | 早中三叠世 沉积环境 岩相古地理 四川义敦 |
Sedimentary Facies and Paleogeography for the Lower-Middle Yidun Group in Yidun,Sichuan |
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| DAI Zong-ming,SUN Chuan-min.Sedimentary Facies and Paleogeography for the Lower-Middle Yidun Group in Yidun,Sichuan[J].Acta Geologica Sichuan,2008,28(3):178-183. |
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| Authors: | DAI Zong-ming SUN Chuan-min |
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| Institution: | (College of Earth Science, Chengdu University of Technology, Chengdu 610059) |
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| Abstract: | The study of 18 geological profiles of the Lower-Middle Triassic Dang＇en and Lieyi Formations in the related 1 ： 50 000 quadrangles indicates that the evolution of sedimentary environment in the Early-Middle Triassic Epoch in the Yidun region, Sichuan underwent a process of abyssal basin middle-distal fan→ abyssal basin turbidity→ lower slope→upper slope→ outer shelf→outer shelf-upper slope. And sedimentary isopachs show that 2 sedimentary centers such as Shangmarong basin and Yidun basin, and other Lanashan down-warped basin come into existence in the studied region in the Early-Middle Triassic Epoch. |
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| Keywords: | Early-Middle Triassic Epoch sedimentary environment sedimentary facies and paleography Yidun Sichuan |
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