| 川滇黔桂地区石炭系层序地层研究 |
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| 引用本文： | 彭军,陈洪德,田景春,覃建雄,侯中建,杨晓宁,寿建峰,沈安江,陈子炓.川滇黔桂地区石炭系层序地层研究[J].沉积学报,2000,18(2):190-197. |
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| 作者姓名： | 彭军 陈洪德 田景春 覃建雄 侯中建 杨晓宁 寿建峰 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： | 川滇黔桂地区石炭系地层发育,其地层划分对比清楚,沉积类型丰富,地表露头良好,是进行层序地层研究的理想场所。本文运用层序地层学的理论和研究方法,在详细的沉积学研究和精细的地层划分对比基础上,对川滇黔桂地区石炭系地层进行了精细的露头层序地层研究,详细阐述了层序建立和各种界面的露头标志,探讨了川滇黔桂地区石炭系地层的层序划分、层序区域对比。在此基础上,建立了研究区石炭系层序地层时空格架示意图。
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| 关 键 词： | 层序地层 时空格架 石炭系 川滇黔桂地区 |
| 收稿时间： | 1999-06-30 |
Sequence Stratigraphy Study on the Cabroniferous Strata in Sichuan,Yunnan,Guizhou and Guangxi |
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| PENG Jun,CHEN Hong-de,TIAN Jing-chun,QIN Jian-xiong,HOU Zhong-jian,YANG Xiao-ning,SHOU Jian-feng,SHENG An-jiang,CHEN Zhi-liao.Sequence Stratigraphy Study on the Cabroniferous Strata in Sichuan,Yunnan,Guizhou and Guangxi[J].Acta Sedimentologica Sinica,2000,18(2):190-197. |
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| Authors: | PENG Jun CHEN Hong-de TIAN Jing-chun QIN Jian-xiong HOU Zhong-jian YANG Xiao-ning SHOU Jian-feng SHENG An-jiang CHEN Zhi-liao |
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| Institution: | 1 Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 61005;2 Hangzhou Institute of Petroleum Geology, Hangzhou 310023 |
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| Abstract: | The Carboniferous strata extensively distributes in Sichuan,Yunnan,Guizhou and Guangxi provinces. It has the characteristicse of clear stratigraphic division and correlation, plentiful sediment types and better outcrops. It is suitable to have the sequence stratigraphy research in these areas. This paper has focused on the accurate researches of the exposure sequence str atigraphy of the Carboniferous strata based on the detailed sedimentological stu dy and accurate stratigraphic division and correlation of the Carboniferous stra ta in Sichuan,Yunnan,Guizhou and Guangxi provinces with the aid of the theor y and studying means of the exposure sequence stratigraphy. Sequences are divide d mainly by the characteristics of the key boundary surfaces,regional correla tion,sedimentary facies sequence changes,parasequence stacking patterns,facies a ssemblage and sedimentary geochemistry. It has expounded in detail the outcrop signs of the sequence division and various boundary surfaces. The Carboniferous strata in the study area are divided into 10 third-scale se quences, which are named from sequence 1 to 10, with the upper series of Carboni ferous strata having 5 sequences and the lower series also. In the lower series of Carboniferous strata, Yanguan stage are composed of sequence 1 to 2, and Data ng stage from sequences 3 to 5. In the upper series, Huashiban stage are compos ed of sequence 6 and Dala stage of sequence 7, and Maping stage from sequence 8 to 10. According to the features of the bottom boundary surface, 10 sequences ar e classified into two sorts of sequences, which are type Ⅰ sequence (S1,S3,S6,S9,S10) and type Ⅱ sequence(S2,S4,S5,S7,S8). The bottom boundary surfaces of type Ⅰ sequence all have clear signs including the strong paleokarst,the different thickness eluvial facies,the strata disconti nutity,the immense changes of sedimentary patterns and traits,the regional rev ival of river,the disappearence and abrupt changes of organism evolution and the huge and sudden alternation of carbon,oxygen and strontium isotope values. On t he other hand, the bottom boundary surfaces of type Ⅱ sequence are character iz ed by the transient exposure,the weak erosion and the lithoface texture transfor mation. So it is discerned more difficultly than the bottom boundary surface of type Ⅰ sequence. This paper also has expounded in detail the sedimentary features of the first transgressive surfaces and condensed sections of sequences in the different sedi mentary environments and basins. It has summarized the sedimentary characteristi cs of the different system tracts in the different facies and basins. On the ba sis of these researches, this paper has probed the sequence correlation in the different sedimentary facies and basins from the ways of the sequence number s,boundary surface traits and system tract structures and has founded the time -space pattern diagram of the Carboniferous sequence strata in the study area. |
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| Keywords: | sequence stratigraphy time-space pattern Carboniferous Sichuan Yunnan Guizhou and Guangxi provinces |
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