The P-T Environment of the Depression-upwelling Faulted Zone for the Existence of Gas Hydrates in the Northern Slope of the South China Sea
Geoscience(2006)
摘要
The development and existence of the gas hydrates are controlled prominently by the structural conditions.Several special structural units in the active or passive continental margins including accretionary wedge,mud volcano,mud diaper and seafloor slip are favorable structures for the development and existence of gas(hydrates).The investigation and research in the north slope of the South China Sea(SCS) suggest that the(depression-)upwelling faulted zone(DUFZ) is one of the important favorable structural circumstances for gas(hydrates) coming into being.Based on the comprehensive comparison,the temperature in the sediment is calculated from the relationship between the water depth and the seafloor temperature in the northern slope of the SCS,while the lithostatic pressure in the sediment is calculated from the relationship between the sediment depth and body density which was simulated in this paper.Furthermore,the P-T environment of the profile A which traverses the structure of DUFZ is analyzed in detail.The result shows that the free gas can always meet the favorable P-T environment and form gas hydrates when the gas transfers in the DUFZ because of the continuous variation of P-T environment in the structure,but it is not everywhere.The analysis of temperature and pressure in situ is necessary for the location of the gas hydrates.
更多查看译文
关键词
gas hydrates,south china sea,faulted zone,northern slope,depression-upwelling
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要