| 四川盆地西部晚三叠世须二段河流沉积特征探讨 |
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| 引用本文： | 何鲤. 四川盆地西部晚三叠世须二段河流沉积特征探讨[J]. 石油实验地质, 1982, 4(1): 27-34. doi: 10.11781/sysydz198201027 |
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| 作者姓名： | 何鲤 |
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| 作者单位： | 地质部第一石油普查勘探指挥部 |
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| 摘 要： | 什邡金河晚三叠统须家河组第二段(以下简称须二段),厚540余米,下与晚三叠世中期小塘子组冲刷接触;上与须三段为整合接触。其岩性主要为灰色厚层块状中-细粒长石岩屑砂岩及岩屑长石砂岩,夹5-6层粉砂质泥岩、炭质页岩或煤线、煤层。呈由粗-细,即砂岩-泥岩的韵律组合,大致可划分出厚度不等的六个沉积组合(表1)。
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| 收稿时间： | 1980-12-04 |
A STUDY ON THE CHARACTERISTICS OF THE FLUVIAL SEDIMENTS OF THE LATE TRIASSIC XU-2 MEMBER IN WESTERN SICHUAN BASIN |
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| He Li. A STUDY ON THE CHARACTERISTICS OF THE FLUVIAL SEDIMENTS OF THE LATE TRIASSIC XU-2 MEMBER IN WESTERN SICHUAN BASIN[J]. PETROLEUM GEOLOGY & EXPERIMENT, 1982, 4(1): 27-34. doi: 10.11781/sysydz198201027 |
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| Authors: | He Li |
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| Affiliation: | The First Headquarters for Petroleum Prospecting and Exploration, Ministry of Geology |
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| Abstract: | Based on the study of the characteristics of the sediments of the Xu-2 Member at Jinhe, Shifang, six sedimentary assemblages are designated and their ten features are described. It is considered that the sandstone of the Xu-2 Member is formed as a result of superim-position of six major fluvial sedimentations. Through the studies of the features of the fluvial sediments, as well as their mineralogical composition and grain size, five types of sedimentary environment of the Xu-2 sandstone within the Sichuan Basin are distinguished and the extent of their distribution is discussed respectively. Thus, the bank line of the ancient river for the sedimentation of the late Triassic Xujiahe stage of the Sichuan Basin is deduced. |
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