渤海湾盆地南堡凹陷的背形负花状构造

刘晓峰; 董月霞; 王华

doi:10.3799/dqkx.2010.116

渤海湾盆地南堡凹陷的背形负花状构造

doi: 10.3799/dqkx.2010.116

刘晓峰^{1, 2,},
董月霞³,
王华^{1, 2}

1.
中国地质大学构造与油气资源教育部重点实验室，湖北武汉 430074
2.
中国地质大学资源学院，湖北武汉 430074
3.
中国石油天然气股份有限公司冀东油田分公司，河北唐山 063004

基金项目:

国家自然科学基金青年科学基金项目"东营凹陷盐-泥构造与超压含盐流体活动的关系研究" 40402014

详细信息

作者简介:
刘晓峰(1970-)，男，博士，副教授，主要从事沉积盆地分析的科研和教学工作.E-mail: xfliu@cug.edu.cn

中图分类号: P618.130.2
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出版历程
- 收稿日期: 2010-04-25
- 刊出日期: 2010-11-01

Antiformal Negative Flower Structure in Nanpu Sag, Bohai Bay Basin

LIU Xiao-feng^{1, 2
,},
DONG Yue-xia³,
WANG Hua^{1, 2}

1.
Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geosciences, Wuhan 430074, China
2.
Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China
3.
Jidong Oilfield Company, PetroChina, Tangshan 063004, China

摘要

摘要: 花状构造以其独特的构造样式而成为在剖面上识别走滑构造的重要标志.经典的花状构造包括正花状构造和负花状构造.渤海湾盆地南堡凹陷发育一种新型的花状构造——背形负花状构造.在三维地震剖面上，背形负花状构造是由一束向上、向外撒开的大多数为正离距的离散的走滑断层或转换伸展断层所限定的，下部呈"向形"，上部呈"背形"的组合样式.平面上，褶皱和相关正断层呈雁行排列.背形负花状构造发育于南堡凹陷转换伸展的构造背景.浅层的"背形"是由转换伸展断层牵引塑性的盖层而形成的一种强制褶皱.该构造经历了牵引背斜形成和背斜脊部断裂-塌落两个发育阶段.背形负花状构造普遍发育于渤海湾盆地的新近系.
- 背形负花状构造 /
- 构造地质 /
- 沉积作用 /
- 南堡凹陷
Abstract: Flower structures are specific modes of formation, and their distinctive characteristics make them important criteria for the identification of a strike-slip zone in vertical cross-sections and on seismic profiles. Two element types of the classical flower structures were respectively negative and positive flower structures. There is a new kind of flower structure termed antiformal negative flower structures in Nanpu sag, Bohai Bay basin. A antiformal negative flower structure in 3D seismic profiles from the Nanpu sag consists of a shallow antiform and a deep synform bounded by upward and outward spreading strands of a strike-slip fault that have mostly normal separations. In map-view, the folds and associated normal faults present an en echelon arrangement. Antiformal negative flower structure formed in the transtensional setting of Nanpu sag. The shallow antiform is forced folds caused by the transtensional faults dragging cover into folds. Antiformal negative flower structure undergone two phases of deformation including: (1) forming of drag fold and (2) fualting and collapsing of the fold crest. The antiformal negative flower structures are a widespread structural styles in the Neogene of the Bohai Bay basin.
- antiformal negative flower structure /
- structural geology /
- sedimentation /
- Nanpu sag

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图 1 花状构造的类型

T.面向观察者；A.背离观察者

Fig. 1. Types of flower structures in cross-sections

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图 2 渤海湾盆地南堡凹陷构造格局

Fig. 2. The tectonic framework of the Nanpu sag

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图 3 南堡凹陷三维地震剖面NP001构造解释

T1.明化镇组底；T2.馆陶组底；T3.东营组底；T4.沙一段底；T6.沙三段底

Fig. 3. Structural interpretation of 3D seismic profile NP001 from Nanpu sag

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图 4 南堡凹陷三维地震剖面NP002构造解释

a.H1-H7为任意标志轴，T1为明化镇组底界；b.F3为断层归位

Fig. 4. Structural interpretation of 3D seismic profile NP002 from Nanpu sag

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图 5 南堡凹陷南堡1号构造带水平切片(1 000 ms)解释

Fig. 5. Interpreted time slice 1 000 ms showing the en echelon faults and folds in the Nanpu 1 structural zone

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图 6 背形负花状构造成因模式

Fig. 6. Schematic interpretation of the formation of the antiformal negative flower structure

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