西南石油大学学报(自然科学版) ›› 2012, Vol. 34 ›› Issue (4): 1-12.

• 地质勘探 •    下一篇

贵州习水地区奥陶系露头层序地层研究

刘治成1,张廷山1,完颜祺琪1,2,杨扬3,杨巍1   

  1. 1. 西南石油大学资源与环境学院,四川成都6105002. 中国石油勘探开发研究院廊坊分院,河北廊坊0650073. 中国石油西南油气田分公司蜀南气矿,四川泸州646000
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2012-08-01 发布日期:2012-08-01

Outcrop Sequence Stratigraphy of the Ordovician in Xishui,Guizhou

Liu Zhicheng1, Zhang Tingshan1, Wanyan Qiqi1,2, Yang Yang3, Yang Wei1   

  1. 1. School of Resources and Environment,Southwest Petroleum University,Chengdu,Sichuan 610500,China2. PetroChina Exploration & Development Research Institute–Langfang,Langfang,Hebei 065007,China3. Shunan Gas District of Southwest Oil and Gas Company,PetroChina,Luzhou,Sichuan 646000,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2012-08-01 Published:2012-08-01

摘要: 根据野外露头剖面资料,结合碳氧同位素分析,探讨了贵州习水地区奥陶系层序地层界面识别、层序划分及
其碳氧同位素响应。研究区奥陶系可划分出6 个三级层序,包括两个I 型层序界面,两个II 型层序界面及两个III 型
层序界面。三级层序内海侵体系域和高水位体系域内13C 分别呈增加和减小的趋势。碳氧同位素响应能有效反映准
层序叠置形成四级层序。米级旋回发育两种模式:L–M 型米级旋回、潮下型米级旋回。

关键词: 层序地层, 体系域, 碳氧同位素, 奥陶系, 习水地区

Abstract: According to the outcrop and the analyses of the carbon and oxygen isotopes,this paper discusses the identified
stratigraphic sequence surfaces and the response of carbon and oxygen isotopes for the Ordovician formation of Xishui Region
in Guizhou Prvince,and carbon and oxygen isotopes. The result shows the Ordovician system can be divided six three-order
sequences,which include two I-type and two II-type and two III-type sequence surfaces. In the third-order stratigraphic sequence,
13C in system of the advance of sea and the high water level displays trends of increase and decrease respectively. The
responses of carbon and oxygen isotope can effectively reflect the stacking patterns of parasequences form forth order sequence.
Meter-scale cycle has developed two modes in this area during Ordovician period:one is L–M meter-scale cycle type,and the
other is Subtidal meter-scale cycle type.

Key words: sequence stratigraphy, system tract, Carbon and Oxygen isotopes, Ordovician, Xishui Region

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