地学前缘 ›› 2011, Vol. 18 ›› Issue (4): 144-157.

• 论文 • 上一篇    下一篇

塔里木盆地白垩纪—新近纪盆山耦合过程的层序地层响应

丁孝忠，林畅松，刘景彦，韩坤英，庞健峰，庞维华   


  1. 1. 中国地质科学院 地质研究所， 北京 100037
    2. 中国地质大学（北京） 能源学院， 北京 100083
  • 收稿日期:2011-04-12 修回日期:2011-05-17 出版日期:2011-07-18 发布日期:2011-07-20
  • 作者简介:丁孝忠（1963—），男，研究员，博士，矿产普查与勘探专业，主要从事区域地质与含油气沉积盆地分析研究。E-mail: xiaozhongding@sina.com
  • 基金资助:

    局项目（1212010633602）；国家重点基础研究发展计划“973”项目（2006CB202302）

 The sequence stratigraphic response to the basinorogene coupling process of CretaceousNeogene in Tarim Basin, China.


1. Institute of Geology， Chinese Academy of Geological Sciences， Beijing 100037， China
2. School of Energy Resources， China University of Geosciences (Beijing)， Beijing 100083， China   


  1. 1. Institute of Geology， Chinese Academy of Geological Sciences， Beijing 100037， China
    2. School of Energy Resources， China University of Geosciences (Beijing)， Beijing 100083， China
  • Received:2011-04-12 Revised:2011-05-17 Online:2011-07-18 Published:2011-07-20

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摘要：

根据塔里木盆地西南坳陷区和北部坳陷区白垩系—新近系典型露头剖面的层序地层研究，结合地震和钻井资料的分析，在塔西南坳陷区划分出32个三级层序，塔北坳陷区27个三级层序。通过三级层序的叠置方式和构造层序的研究发现，两坳陷区白垩系—新近系中识别出4个以不整合面为主的构造层序界面，划分为4个二级超层序(SS1～4)，并可以进行全盆地等时对比，建立层序地层格架。每一个超层序均表现由退积向进积演化的沉积旋回，在不同方向上具有不同的层序组合特征。构造沉降和物源分析表明：天山和西昆仑山前坳陷沉降沉积过程具有前陆盆地分段式和双物源特征，即早白垩世的中等沉降至晚白垩世的缓慢沉降至古近纪—新近纪快速沉降，物源区变化为：再旋回造山带—克拉通内部—再旋回造山带。同时，由于构造活动对物源区影响的差异，层序构成、沉积速率和沉积体系配置沿造山带方向存在明显的分带性，总体上为西强东弱，反映了塔西南坳陷区和塔北坳陷区沉积充填过程与天山造山带和昆仑造山带升降演化具有盆山耦合特征。

关键词: 塔里木盆地；白垩纪&mdash, 新近纪；盆山耦合过程；层序地层响应

Abstract:

On the basis of the comprehensive analyses of the depositional sequence of the CretaceousNeogene outcrop sections, and the seismic sequence and drillhole information in Tarim Basin, the authors hold that the CretaceousNeogene strata can be divided into 32 depositional sequences in the southwestern depression and 27 depositional sequences in the northwestern depression. According to the study of ordered stacking of several 3rdorder sequences and tectonic sequences, 4 tectonic sequence interfacies with the form of unconformity can be identified in Tarim Basin. And the CretaceousNeogene strata may be redivided into 4 supersequences(SS14) which can be correlated synchronously in Tarim Basin, and the supersequence stratigraphic framework of the CretaceousNeogene in Tarim Basin can be established. Each supersequence represented the evolution cycle from progradation to retrogradation of 3rdorder sequence group and possesses the different characteristics of sequence association in different directions. The analysis of tectonic subsidence and depositional provenances indicate that the processes of subsidence and deposition in the depression in front of Tianshan and Kunlunshan Mts. possess the characteristics of subsection and double provenances of foreland basin: Middle subsidence in the Early Cretaceous, slow subsidence in the Late Cretaceous and rapid subsidence in the Paleogence and Neogence. The change of the provenance areas is recycled orogeninner cratonrecycled orogen. And at the same time, the subarea occurred in terms of sequence constitution, depositional speed and depositional system collocation along the orogen due to the difference in the impact of tectonic movements to the provenance area, which was stronger in the western area than in the east. This proves the characteristics of the basinorogene coupling evolution between the depositional filling of southwestern depression and northwestern depression and liftingfall process of Tianshan and Kunlunshan orogens.

Key words: Tarim Basin, sequence stratigraphic response, basinorogene coupling process, CretaceousNeogene

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