期刊
JOURNAL OF ASIAN EARTH SCIENCES
卷 168, 期 -, 页码 17-26出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jseaes.2018.06.001
关键词
Cold seep; Subsurface fluid flow; Magmatic activity; Hydrothermal vent
资金
- Hainan Provincial Natural Science Foundation of China [418MS120]
- National Natural Science Foundation of China [41606072]
- National Program on Key Basic Research Project (973 Program) [2015CB251201]
- CAS Pioneer Hundred Talents Program
The active Haima cold seep sites were discovered by the remotely operated vehicle on the western part of the northern slope of South China Sea in 2015 and 2016. However, the subsurface structures in the seep area are not well studied, which prevents the further understanding of the evolution of fluid venting system in the active cold seep area. In 2017, a high-resolution 2D seismic line transecting the two main seep sites was acquired and processed. In this study, the subsurface structures were well resolved on the seismic profile. The new observations include the widespread subsurface fluid flow features (i.e., chimney structures and pockmarks) and the pervasively distributed magmatic activities. Seismic indicators for hydrothermal vents were also observed on the seismic section. This new discovery confirms the contribution of magmatic activities to the evolution of subsurface fluid flow in the study area. Minor faults under the recognizable resolution of seismic profile, which can act as conduits for the subsurface fluid flow, were also identified in the fine-grained sediment sequences. Overall, these results provide new insights into the evolution of subsurface fluid flow in the study area.
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