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歧口凹陷构造-层序-沉积一体化研究及其应用
引用本文:吴永平,杨池银,王华,任建业,焦养泉,陆永潮,黄传炎.歧口凹陷构造-层序-沉积一体化研究及其应用[J].大地构造与成矿学,2010,34(4).
作者姓名:吴永平  杨池银  王华  任建业  焦养泉  陆永潮  黄传炎
基金项目:中国石油天然气股份有限公司重大专项课题
摘    要:通过大量地质、地化和物探资料的处理和分析,探讨了新生代歧口凹陷的构造演化、层序格架样式和沉积体系的时空配置。新生代歧口凹陷包括5个负向构造单元、5个正向构造单元,经历了两个构造演化阶段、四个构造活动幕;对歧口凹陷的古近系及新近系进行了系统的层序地层研究,划分了4个二级层序和17个三级层序单元,并识别出断裂陡坡带、多级断阶带、断阶陡坡带以及挠曲坡折带等坡折带类型,建立了相应的层序发育模式和垂向演化模式;明确了歧口凹陷4大主物源体系(北部燕山物源、西部沧县物源、南部埕宁物源和东部沙垒田物源),并按三级层序单元重建了各个时期的沉积体系配置。

关 键 词:构造演化  层序地层格架  物源体系  沉积体系  歧口凹陷  古近系和新近系

Integrated Study of Tectonics-Sequence Stratrigraphy-Sedimentology in the Qikou Sag and Its Applications
WU Yongping,YANG Chiyin,WANG Hua,REN Jianye,JIAO Yangquan,LU Yongchao,HUANG Chuanyan.Integrated Study of Tectonics-Sequence Stratrigraphy-Sedimentology in the Qikou Sag and Its Applications[J].Geotectonica et Metallogenia,2010,34(4).
Authors:WU Yongping  YANG Chiyin  WANG Hua  REN Jianye  JIAO Yangquan  LU Yongchao  HUANG Chuanyan
Abstract:This paper discusses the Cenozoic tectonic evolution,sequence framework,and sedimentary systems of the Qikou sag based on massive geological,geochemical,and geophysical data.The Cenozoic tectonic evolution of the Qikou sag can be divided into two stages and four tectonic episodes.The Paleogene and Neogene strata in the Qikou sag can be divided into 4 secondary-order sequences and 17 third-order sequences.Several slope break types are recognized,these include the faulted abrupt slope zone,multi-stage fault-terrace zone,fault-terrace abrupt slope zone,and flexure slope break zone,and their corresponding sequence developing modes and vertical evolution modes are suggested.Finally,four main provenance systems(northern Yanshan provenance,western Cangxian provenance,southern Chengning provenance,and eastern Shaleitian provenance) as well as their sedimentary systems are proposed.
Keywords:tectonic evolution  sequence stratigraphic framework  provenance system  sedimentary system  Qikou sag  Paleogene and Neogene
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