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| 中扬子区寒武纪层序地层研究 | |
| 引用本文： | 周雁,陈洪德,王成善,金之钧,汤良杰,王正元,梁西文.中扬子区寒武纪层序地层研究[J].沉积与特提斯地质,2003,23(3):65-72. |
| 作者姓名： | 周雁 陈洪德 王成善 金之钧 汤良杰 王正元 梁西文 |
| 作者单位： | 1. 石油大学,资源与环境学院,北京,102200 2. 成都理工大学,油气藏地质与开发国家重点实验室,四川,成都,610059 3. 中国石化江汉油田分公司,研究院,湖北,潜江,433124 |
| 摘 要： | 笔者建立了中扬子区寒武系层序地层格架，研究了中扬子区层序界面和体系域特点，分析了中扬子区层序样式的基本类型及其特征。共划分出2个二级层序、14个三级层序。寒武系下统划分了1个二级层序(SS3)、6个三级层序(SQ1—SQ6)，平均延时约5．0Ma；体系域颜色普遍较深，泥质含量较高，是一套良好的烃源岩。寒武系中上统划分出1个二级层序(SS4)、8个三级层序(SQ7—SQ14)，平均延时约2．9Ma；体系域颜色普遍较浅，云质含量较高，是一套良好的储集层。总体上H型样式为主，T型样式和TH型样式数量相当，反映寒武纪水体中等。二级层序体系域和三级层序体系域都表现出明显的南北向差异性。 |
| 关 键 词： | 层序地层 层序样式 寒武纪 海相沉积 中扬子区 |
| 文章编号： | 1009-3850(2003)03-0065-08 |
| 收稿时间： | 2003/3/3 0:00:00 |
| 修稿时间： | 2003年3月3日 |
Cambrian sequence stratigraphy of the middle Yangtze area |
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| ZHOU Yan,CHEN Hong-de,WANG Cheng-shan,JIN Zhi-jun,TANG Liang-jie,WANG Zheng-yuan,LIANG Xi-wen.Cambrian sequence stratigraphy of the middle Yangtze area[J].Sedimentary Geology and Tethyan Geology,2003,23(3):65-72. | |
| Authors: | ZHOU Yan CHEN Hong-de WANG Cheng-shan JIN Zhi-jun TANG Liang-jie WANG Zheng-yuan LIANG Xi-wen |
| Institution: | ZHOU Yan~1,CHEN Hong-de~2,WANG Cheng-shan~2,JIN Zhi-jun~1,TANG Liang-jie~1,WANG Zheng-yuan~3,LIANG Xi-wen~3 |
| Abstract: | The present paper deals with the Cambrian sequence stratigraphic framework, sequence boundaries, sequence patterns and systems tracts, in the middle Yangtze area. Two second-order sequences and fourteen third-order sequences have been distinguished, including: (1) one second-order sequence (SS3) and six third-order sequences (SQ1-SQ6) for the Lower Cambrian strata, with an average time duration of about 5.0 Ma. The systems tracts are generally dark-coloured, with higher mud contents, and thus may serve as excellent source rocks, and (2) one second-order sequence (SS4) and eight third-order sequences (SQ7-SQ14) for the Middle and Upper Cambrian strata, with an average time duration of about 2.9 Ma. The systems tracts are generally light-coloured, with higher dolomite contents, and thus may serve as excellent reservoir rocks. Collectively, the H-type patterns are dominated; the T-type and TH-type are almost identical, indicating a moderate water depth during the Cambrian. The NS-directed differences are manifested in both second- and third-order systems tracts. |
| Keywords: | sequence stratigraphy sequence pattern Cambrian marine sediments middle Yangtze area |
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