| Characteristics and Formation Mechanism of Polygonal Faults in Qiongdongnan Basin, Northern South China Sea | |
| Sun Qiliang1,2; Wu Shiguo1,3; Yao Genshun4; Lue Fuliang4 | |
| 2009-02-01 | |
| 发表期刊 | JOURNAL OF EARTH SCIENCE
 |
| ISSN | 1674-487X |
| 卷号 | 20期号:1页码:180-192 |
| 文章类型 | Article |
| 摘要 | Based on high-resolution 3D seismic data, we document the polygonal faults within the Miocene Meishan (sic) Formation and Huangliu (sic) Formation of the Qiongdongnan (sic) basin, northern South China Sea. Within the seismic section and time coherent slice, densely distributed extensional faults with small throw and polygonal shape were identified in map view. The orientation of the polygonal faults is almost isotropic, indicating a non-tectonic origin. The deformation is clearly layer-bounded, with horizontal extension of 11.2% to 16%, and 13.2% on average. The distribution of polygonal faults shows a negative correlation with that of gas chimneys. The development of polygonal faults may be triggered by over-pressure pore fluid which is restricted in the fine-grained sediments of bathyal facies when the sediments is compacted by the burden above. The polygonal faults developed to balance the volumetric contraction and restricted extension. The product of hydrocarbon in the Meishan Formation may have contributed to the development of the polygonal faults. In the study area, it was thought that the petroleum system of the Neogene post-rift sequence is disadvantageous because of poor migration pathway. However, the discovery of polygonal faults in the Miocene strata, which may play an important role on the fluid migration, may change this view. A new model of the petroleum system for the study area is proposed.; Based on high-resolution 3D seismic data, we document the polygonal faults within the Miocene Meishan (sic) Formation and Huangliu (sic) Formation of the Qiongdongnan (sic) basin, northern South China Sea. Within the seismic section and time coherent slice, densely distributed extensional faults with small throw and polygonal shape were identified in map view. The orientation of the polygonal faults is almost isotropic, indicating a non-tectonic origin. The deformation is clearly layer-bounded, with horizontal extension of 11.2% to 16%, and 13.2% on average. The distribution of polygonal faults shows a negative correlation with that of gas chimneys. The development of polygonal faults may be triggered by over-pressure pore fluid which is restricted in the fine-grained sediments of bathyal facies when the sediments is compacted by the burden above. The polygonal faults developed to balance the volumetric contraction and restricted extension. The product of hydrocarbon in the Meishan Formation may have contributed to the development of the polygonal faults. In the study area, it was thought that the petroleum system of the Neogene post-rift sequence is disadvantageous because of poor migration pathway. However, the discovery of polygonal faults in the Miocene strata, which may play an important role on the fluid migration, may change this view. A new model of the petroleum system for the study area is proposed. |
| 关键词 | Polygonal Fault Qiongdongnan Basin Gas Chimney Composite Channel Migration Pathway |
| 学科领域 | Geosciences, Multidisciplinary |
| DOI | 10.1007/s12583-009-0018-z |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000264753800018 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/3698 |
| 专题 | 海洋地质与环境重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.China Univ Petr, Coll Georesource & Informat, Qingdao 266555, Peoples R China 4.PetroChina Hangzhou Inst Geol, Hangzhou 310023, Zhejiang, Peoples R China |
| 第一作者单位 | 中国科学院海洋研究所 |
| 推荐引用方式 GB/T 7714 | Sun Qiliang,Wu Shiguo,Yao Genshun,et al. Characteristics and Formation Mechanism of Polygonal Faults in Qiongdongnan Basin, Northern South China Sea[J]. JOURNAL OF EARTH SCIENCE,2009,20(1):180-192. |
| APA | Sun Qiliang,Wu Shiguo,Yao Genshun,&Lue Fuliang.(2009).Characteristics and Formation Mechanism of Polygonal Faults in Qiongdongnan Basin, Northern South China Sea.JOURNAL OF EARTH SCIENCE,20(1),180-192. |
| MLA | Sun Qiliang,et al."Characteristics and Formation Mechanism of Polygonal Faults in Qiongdongnan Basin, Northern South China Sea".JOURNAL OF EARTH SCIENCE 20.1(2009):180-192. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| sun-Characteristics （1925KB） | 限制开放 | -- | 浏览 | |||
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
修改评论