Seismic sequence stratigraphic analysis of the carbonate platform, north offshore Taiping Island, Dangerous Grounds, South China Sea
Seismic sequence stratigraphic analysis of the carbonate platform, north offshore Taiping Island, Dangerous Grounds, South China Sea
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DOI：
10.1016/j.tecto.2015.12.010
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发表时间：
2017-04
期刊：
影响因子：
2.9
通讯作者：
Jih‐Hsin Chang;H. Hsu;Char‐Shine Liu;T. Lee;S. Chiu;C. Su;Yu-Fang Ma;Y. Chiu;H. Hung
中科院分区：
文献类型：
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作者：
Jih‐Hsin Chang;H. Hsu;Char‐Shine Liu;T. Lee;S. Chiu;C. Su;Yu-Fang Ma;Y. Chiu;H. Hung
太平岛，又称太平岛，是南海最大的天然陆地，位于南海中心。利用测深和海洋多道地震资料，探讨了太平岛以北近海孤立碳酸盐岩台地的地震地层特征。碳酸盐台地西翼具有高振幅和低振幅反射夹层的特征，显示了台地前坡沉积物向陆地和向海的迁移。此外，还有两个近海碳酸盐岩堆积物位于正断层之下。识别了由海平面升降循环引起的六个层序边界和五个沉积层序，并与海平面升降图进行了关联。虽然地震序列的演化部分受局部构造控制，但研究区沉积地层总体叠置格局揭示了5个三级旋回和1个二级旋回，与海平面升降图相符。此外，还根据地震资料对西太平海山群和政和-道明海槽的形成进行了初步分析。
Taiping Island, also known as Itu Aba, is the largest natural terrestrial landmass in the South China Sea and is centrally located. Using bathymetry and marine multi-channel seismic data, we explored the seismic stratigraphic features of the offshore and isolated carbonate platform north of Taiping Island. The western flank of the carbonate platform is characterized by an intercalation between high-amplitude and low-amplitude reflections, showing the landward and seaward migration of the platform foreslope deposits. In addition, there are two offshore carbonate build-ups that are underlain by normal faults. Six sequence boundaries and five depositional sequences caused by eustatic sea level cycles are identified and correlated with the eustatic sea level change chart. Although the evolution of the seismic sequences is partly controlled by local tectonics, the overall stacking pattern of the sedimentary strata in our study area reveals five third-order cycles and one second-order cycle, which is in accordance with the eustatic sea level chart. Additionally, the formations of the Western Taiping Seamount Group and the Zhenghe-Daoming Trough are preliminarily analyzed based on seismic data.