| 四川盆地东缘上三叠统须家河组沉积特征 |
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| 引用本文： | 梁西文,何文斌,盛贤才.四川盆地东缘上三叠统须家河组沉积特征[J].华南地质与矿产,2006(1):59-65. |
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| 作者姓名： | 梁西文 何文斌 盛贤才 |
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| 作者单位： | 1. 成都理工大学,成都,610059;江汉油田分公司勘探开发研究院,湖北,潜江,433124
2. 江汉油田分公司勘探开发研究院,湖北,潜江,433124 |
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| 摘 要： | 根据露头剖面实测、观察资料,分析和总结了四川盆地东缘上三叠统须家河组(T3x)的地层、岩性特征及沉积相标志.研究区内须家河组岩性为成分成熟度低的砂岩夹泥岩(局部有薄煤层及煤线),结合沉积相标志的研究结果认为其主要为三角洲-湖泊、辫状河、曲流河沉积,且以辫状河沉积为主.三角洲-湖泊沉积在须家河组下部相对发育,包括了沼泽、分流河道、水下分流河道、分流间湾、浅湖等微相类型,辫状河则在该组中部发育,包括了心滩、废弃河道等微相类型,曲流河沉积发育于该组近顶部,包括了边滩、泛滥平原(沼泽)等沉积微相,其中辫状河心滩是区内主要储集体,而三角洲-湖泊泥岩是良好的烃源岩,提出了区内须家河组的沉积相模式.
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| 关 键 词： | 上三叠统 须家河组 沉积特征 四川盆地东缘 |
| 文章编号： | 1007-3701（2006）01-0059-07 |
| 收稿时间： | 2005-10-16 |
| 修稿时间： | 2005年10月16 |
A Study on Sedimentary Characteristics of Upper Triassic Xujiahe Formation in the Eastern Margin of Sichuan Basin |
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| LIANG Xi-wen,HE Wen-bin,SHENG Xian-cai.A Study on Sedimentary Characteristics of Upper Triassic Xujiahe Formation in the Eastern Margin of Sichuan Basin[J].Geology and Mineral Resources of South China,2006(1):59-65. |
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| Authors: | LIANG Xi-wen HE Wen-bin SHENG Xian-cai |
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| Abstract: | Based on outcrop data, both stratigraphic and lithological characteristics of Upper Triassic Xujiabe formation in the eastern margin of Sichuan basin are analysised in this paper, and its sedimentary characteristics was summarized,too. Xujiahe formation is dominated by sand-stones with a little silty mudstones, which is believed to be the product of fluvial environment by analysis of sedimentary marks. The braided river deposits are developed in the lower- middle part of this formation including several microfacies such as channel bar, flooding plain, valley depression and valley marsh, etc. The meandering river deposits appear in the top part of this formation, including microfacies such as pointbar and flooding plain, etc. The channelbar sandstone is the main reservoir, meanwhile valley depression and valley marsh is the good site for source rocks accumulation. The mode of sedimentary facies of Xujiahe formaton is put forward in this paper. |
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| Keywords: | Upper Triassic Xujiahe formation Sedimentary characteristics the Eastern Sichuan basin |
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