凝缩段特征及其与烃源岩的关系——以中国南方海相震旦系—中三叠统为例

doi:10.11743/ogg20060313

摘要/Abstract

摘要：

在层序地层学研究中,可用于确定层序的界面有层序的底界面、初始海泛面和最大海泛面,其中最大海泛面所对应的产物为凝缩段。对凝缩段的识别不仅是认识层序结构的关键,而且对分析地质历史时期全球相对海平面变化至关重要。以中国南方海相震旦系—中三叠统为例,在大量野外剖面详细观测的基础上,识别出凝缩段的物质表现形式有6种类型,分别是硅质岩、黑色页岩、泥质岩、生物化石层、泥晶灰岩和瘤状灰岩。不同类型的凝缩段虽然为不同沉积环境的产物,但均代表了全球性对海平面达到最高位置的产物,其形成时期对应于中国南方烃源岩最佳发育时期。

关键词: 层序凝缩段, 烃源岩, 特征, 震旦系—中三叠统, 中国南方

Abstract:

In sequence stratigraphy,boundaries that can be used to define sequences include bottom boundaries,initial marine flooding surface and maximum flooding surface,of which the sediments corresponding to the maximum flooding surface constitute the condensed section.Identification of condensed section is not only the key to understanding of sequence structure,but also critical to analysis of global relative sea level changes during geologic history.Taking the marine Sinian-Middle Triassic in southern China as examples,6 rock formations are recognized in condensed section,including silicalite,black shale,argillaceous rock,biogenic fossil bed,micrite and nodular limestone.Although different types of condensed sections have been deposited in different sedimentary environments,they all have been deposited when the global relative sea level reached the highest position.Their formation time,therefore,corresponds to the optimum development stage of source rocks in southern China.

Key words: condensed section, feature, source rock, Sinian-Middle Triassic, South China

中图分类号:

TE112.1

田景春,陈洪德,张翔,等. 凝缩段特征及其与烃源岩的关系——以中国南方海相震旦系—中三叠统为例[J]. 石油与天然气地质, 2006, 27(3): 378-383. doi: 10.11743/ogg20060313 Tian Jingchun,Chen Hongde,Zhang Xiang,et al. Features of condensed section and its relationship with source rocks: taking marine Sinian-Middle Triassic in southern China as examples[J]. Oil & Gas Geology, 2006, 27(3): 378-383. doi: 10.11743/ogg20060313

参考文献

[1] Vail P R.The stratigraphic signature of tectonics,eustasy and sedimentology-an overiew[A].In:Einsela G,Ricken W,Seilacher A,eds.Cycles and events in stratigraphy[C].Berlin:Springer-V erlag,1991
[2] Haq B U,Hardenbol J,Vail P R.Chronology of fluctuating sea level since the Triassic[J].Science,1987,235:1 156-1 167
[3] 陈洪德,覃建雄,田景春,等.右江盆地层序充填动力学初探[J].沉积学报,2000,18(2):165～171 Chen Hongde,Qin Jianxiong,Tian Jingchun,et al.Sequence filling dynamics of Youjiang basin,southern China[J].Acta Sedimentogica Sinica,2000,18 (2):165-171
[4] 侯中健,陈洪德,田景春.右江盆地海相泥盆系-中三叠统层序界面成因类型与盆地演化[J].沉积学报,2000,18(2):205～209 Hou Zhongjian,Chen Hongde,Tian Jingchun.Genesis of sequence boundary and basin evolution in Youjiang basin during the Devonian to the Middle Triassic[J].Acta Sedimentogica Sinica,2000,18(2):205-209
[5] 贾振远,杨家騄,李志明,等.中国古大陆及其边缘早古生代层序地层及海平面变化的基本特征[J].地球科学,1997b,22(5):544～551 Jia Zhenyuan,Yang Jialu,Li Zhiming,et al.Sequence stratigra phy and sea level changes on Early Paleozoic paleocontinents and their margins in China[J].Acta Geosscientica Sinica,1997,22(5):544-551
[6] 彭军,陈洪德,田景春,等.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 Peng Jun,Chen Hongde,Tian Jingchun,et al.Sequence tratigraphy study on the Carboniferous strata in Sichuan,Yunnan,Guizhou and Guangxi[J].Acta Sedimentogica Sinica,2000,18 (2):190-197
[7] 覃建雄,陈洪德,田景春,等.川滇黔桂地区泥盆系层序地层分析[J].沉积学报,2001,18(2):172～180 Qin Jianxiong,Chen Hongde,Tian Jingchun,et al.Sequence stratigraphy of Devonian in Sichuan,Yunnan,Guizhou and Guangxi[J].Acta Sedimentogica Sinica,2000,18(2):172-180
[8] 田景春,陈洪德,彭军,等.右江盆地深水沉积层序地层学研究[J].沉积学报,2000,18(2):210-214 Tian Jingchun,Chen Hongde,Peng Jun,et al.Study on sequence stratigraphy of deep water sediments in Youjiang basin[J].Acta Sedimentogica Sinica,2000,18(2):210-214
[9] 吴诒,龚一鸣,李德清.华南泥盆系层序地层与岩石、年代地层界线间相关性探讨[J].地球科学,1994,19(5):565～574 Wu Yi,Gong Yiming,Li Deqing.Correlation of sequence stratigraphy to lithostratigraphy and chronostratigraphy of Devonian in South China[J].Acta Geosscientica Sinica,1994,19 (5):565-574
[10] 杨家騄,徐世球川黔湘交境寒武纪二级层序的划分及海平面变化[J].地球科学,1997,22(5):467～470 Yang Jialu,Xu Shiqiu.The second-order sequence division and sea level fluctuation in Cambrian on the border of Sichuan,Guizhou and Hunan[J].Acta Geosscientica Sinica,1997,22(5):467-470
[11] 威尔格斯署C K.层序地层学原理[M].徐怀大,魏魁生,洪卫东,译.北京:石油工业出版社,1993 Vailgus C K.Sea-level changes:an integrated approach.Xu Huaida,Wei Kuisheng,Hong Weidong,translated.Beijing:Petroleum Industry Press,1993
[12] 钱奕中,陈洪德,刘文均.层序地层学理论和研究方法[M].成都:四川科学技术出版社,1994 Qian Yizhong,Chen Hongde,Liu Wenjun.Sequence stratigraphic theory and analyses[M].Chengdu:Science & Technology Press of Sichuan,1994
[13] Vail P R,Hardenbol J.Sea-level changes during the Tertiary[J].Oceans,1997,22:71-79
[14] Kidwell S M.Condensed deposits in siliciclastic sequences:expected and observed features[A].In:Einsela G,Ricken W,Seilacher A,eds.Cycles and Events in Stratigraphy[C].Berlin:Springer-Verlag,1991.682-695
[15] 葛铭,孟祥化,陈荣坤,等.海绿石质凝缩层:克拉通盆地层序地层划分对比的关键--华北寒武系凝缩层的特征和含义[J].沉积学报,1995,13(4):1～15 Ge Ming,Meng Xianghua,Chen Rongkun,et al.Glauconitic condensed sections:the key to correlation of sequence stratigraphy in the craton basin-characteristics and implication of the Cambrian condensed section of North China[J].Acta Sedimentogica Si-nica,1995,13(4):1-15