| 川滇黔桂地区泥盆系层序地层分析 |
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| 引用本文： | 覃建雄,陈洪德,田景春,彭军,侯中健,寿建峰,杨晓宁,沈安江,陈子炓.川滇黔桂地区泥盆系层序地层分析[J].沉积学报,2000,18(2):172-179. |
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| 作者姓名： | 覃建雄 陈洪德 田景春 彭军 侯中健 寿建峰 杨晓宁 沈安江 陈子炓 |
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| 作者单位： | 1 成都理工学院沉积地质研究所 成都 610059; |
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| 摘 要： | 根据层序关键界面、体系域叠置关系及内部构型特征,结合生物地层资料,右江盆地泥盆系可划分为17个三级层序,其中下统 7个、中统 5个、上统 5个,包括 9个Ⅰ型层序、8个Ⅱ型层序,代表17次三级相对海平面变化产物。在此基础上,对不同沉积背景的层序进行了对比,建立了相应的层序格架模型。结果表明,不同沉积相带的层序内部构型和成因格架存在一定的差异,但由于海平面变化这一共同因素的影响,它们仍可进行对比和追踪。
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| 关 键 词： | 层序地层 泥盆纪 右江盆地 |
| 收稿时间： | 1999-06-30 |
Sequence Stratigraphy of Devonian in the Youjiang Basin |
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| QIN Jian-xiong,CHEN Hong-de,TIAN Jing-chun,PENG Jun,HOU Zhong-jian,SHOU Jian-feng,YANG Xiao-ning,SHENG An-jiang,CHEN Zhi-liao.Sequence Stratigraphy of Devonian in the Youjiang Basin[J].Acta Sedimentologica Sinica,2000,18(2):172-179. |
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| Authors: | QIN Jian-xiong CHEN Hong-de TIAN Jing-chun PENG Jun HOU Zhong-jian SHOU Jian-feng YANG Xiao-ning SHENG An-jiang CHEN Zhi-liao |
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| Institution: | 1 Institute of Sedimentary Geology, Chengdu University of Technol ogy, Chengdu 610059;2 Hangzhou Institute of Petroleum Geology, Hangzhou 310023 |
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| Abstract: | Based on key sequence boundary, sedimentary system tracts, in conjunc tion with bio-stratigraphy, sequence stratigraphy during the Devonian in the Yo ujiang Basin has been studied in detail. 17 3rd-order sequences have been recog nized for the first time, 7 sequences in the Lower, 5 sequences in the Middle an d 5 sequences in the Upper Devonian, including 10 Ⅰ-type sequences and 7 Ⅱ-t ype sequences, representing 17 3rd-order relative sea level changes. Moreover, sequences in different sedimentary backgruonds have been correlated and then cor responding seqence stratigaphic framework has also been established. This paper demonstrated that sequence internal architecture and genetic framework within va rious sedimentary facies zones are obviously different, but they can be correlat ed and traced because of the same control factor-relative sea level changes. The Devonian transgression in this area extended from south to north overlappe d in the formation of the transgression-type sequences. These sequences were co ntrolled by sea-level change and tectonic activities. At least three 2nd-order rising sea level stages have been distinguished. During the basin evolution, the late stage of Early and Middle Devonian and the early of Late Devonian correspo nd to the eustatic change of sea level. During these periods the tectonic, volca nism and sedimentary differentiation might be very strong. Devonian basin can be subdivided into stability and riftplatform. the former distributes in Lochkovian, Pragian, Eifelian, Frasnian and Famenian, and the latter in Emrian and Givetian. In the stability age, sequences can be correlated one by one. But in tectonic area period, sequences are clearly different. The r esult of research shows that Devonian sequence of stabilized platform area is ma inly controlled by sea ieel change and tectonic movement of the globe or the r egion, and the sequence of the rift trough in the platform is controlled by the basement tectonics of the basin and the episodic subsidence. |
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| Keywords: | sequence stratigraphy Devonian Youjiang Basin |
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