东海陆架盆地南部中生代断裂系统与盆地结构

杨艳秋; 杨长清; 杨传胜; 孙晶

doi:10.16562/j.cnki.0256-1492.2019080501

东海陆架盆地南部中生代断裂系统与盆地结构

1.
中国地质调查局青岛海洋地质研究所，青岛 266071

2.
青岛海洋国家实验室海洋矿产资源评价与探测技术功能实验室，青岛 266071

基金项目: 中国地质调查局项目（DD20160153，DD20190211），“东海陆架盆地西部坳陷带含油气远景调查评价”（1212010310403）

详细信息

作者简介: 杨艳秋（1976－），女，正高级工程师，主要从事海洋油气地质研究，E-mail：qimgyyq@126.com

通讯作者: 杨长清（1965－），男，研究员，主要从事石油地质研究与盆地分析，E-mail：yangcq65@126.com

中图分类号: P736.1

收稿日期: 2019-08-05

修回日期: 2019-09-26

刊出日期: 2019-12-25

Mesozoic fault system in the Southern East China Sea Shelf Basin and its bearing on basin structures

1.
Qingdao Institute of Marine Geology, CGS, Qingdao 266071, China

2.
Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China

More Information

Corresponding author: YANG Changqing, yangcq65@126.com

Received Date: 05 August 2019

Revised Date: 26 September 2019

Publish Date: 25 December 2019

摘要

摘要:
以东海陆架盆地南部为研究对象，运用丰富的二维地震资料，在对中生界断裂体系精细刻画的基础上，分析了断裂的展布特征，并就断裂系统对盆地结构的控制作用进行了研究，结果表明：该区域中生界断裂系统十分发育，断层表现出张性或张扭性特征并具有多期活动的特点；根据断裂平面展布及组合特征，可划分出3类构造样式，8种断裂组合；根据断裂发育时间，可将断裂的活动期次划分为燕山期和喜山期；受控于NE和NNE向的断裂系统，中生界盆地构造格局表现为“三凹两凸”结构特征；断裂发育的时间及特点对中生界盆地的构造演化和沉积过程起着重要的控制作用。
- 断裂系统 /
- 盆地结构 /
- 东海陆架盆地南部 /
- 中生代
Abstract:
Upon the detailed description of fault system, this paper is devoted to the distribution pattern of faults in the study area of the southern East China Sea Shelf Basin and its control over basin structures. A great amount of 2D seismic data is used in the process. Results show that Mesozoic fault systems are well developed in the region as the results of multistage tensional or transtensional movements. Based on their lateral distribution pattern and features of assemblage, the faults can be divided into 3 tectonic styles and 8 groups. The faulting activities are mainly prevailed in the Yanshanian and Himalayan periods. The structural pattern of the Mesozoic basin is controlled by the NE and NNE fault systems. There are three depressions and two uplifts in the Mesozoic basin. It is recognized that these faults have played critical roles in the Mesozoic tectonic evolution and sediment deposition in the southern East China Sea Shelf Basin.
- fault system /
- basin structure /
- East China Sea Shelf Basin /
- Mesozoic

HTML全文

图 1 东海陆架盆地区域构造及研究区位置

Figure 1.

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图 1

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图 2 东海陆架盆地南部中生界断裂的平面及剖面特征

Figure 2.

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图 3

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图 3 主要断裂生长指数对比

Figure 3.

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图 4 东海陆架盆地南部构造演化剖面（测线位置见图5）

Figure 4.

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图 5 东海陆架盆地南部中生界构造区划图

Figure 5.

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图 6 过东海陆架盆地南部中生界地震剖面（测线位置见图5）

Figure 6.

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表 2 东海陆架盆地南部中生界主要断裂要素

Table 2. Essential factors of main faults of the Southern East China Sea Shelf Basin

断裂名称	断裂性质	垂直断距/m			断裂产状		延伸长度/km	断开层位
断裂名称	断裂性质	T₅⁰	T₆⁰	T_g	走向	倾向	延伸长度/km	断开层位
F2	正断层	1 000～5 000		300～6 000	北东	北西	160	T_g-T₅⁰
F1-4	正断层	1 000～3 000		1 000～5 000	北北东	北西	75	T_g-T₅⁰
F1-3	正断层	1 000～3 000		1 000～5 000	北东	北西	38	T_g-T₅⁰
F1-2	正断层	1 000～3 000		500～5 000	北北东	北西	62	T_g-T₅⁰
F1-1	正断层	500～2 000		1 000～3 000	北北东	北西	150	T_g-T₅⁰
F3	正断层	500～1 500	1 000～2 500	100～3 000	北北东	北西	250	T_g-T₅⁰

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