Thermal Structure and Northern Moho Temperature of Qiongdongnan Basin, Margin of the South China Sea

详细信息   

• 责任者：Shan Jingnan (Graduate University of Chinese Academy of Sciences ; Beijing 100049 ; China) ; Zhang Gongcheng
• 刊名：Chinese Journal of Geophysics
• 出版年：2011
• 卷期：54(8)
• 关键词：莫霍间断面 ; Mohorovicic discontinuity ; 岩石圈 ; lithosphere ; 南海 ; South China Sea
• 页码：p.2102-2109
• 图表：5 illus., 1 table, 30 refs.
• 分类号：0400
• 出版序号：1582
• issnNo：ISSN0001-5733
• isbnNo：CN11-2074/P

摘要

There have been a number of studies on lithospheric thermal structure m continent, but few in oceanic or continent-ocean transition zones. Based on submarine heat flow data and related petrological thermal properties available in Qiongdongnan Basin, the authors calculate the constitution of heat flow and deep temperature of different layers along four distinct seismic profiles. The crustal structure in this area is divided into four layers based on latest analysis of Pwave velocity variation, that is sediments, upper crust, normal lower crust and anomalous lower crust with high velocity, respectively. The results demonstrate that mantle heat flow increases from shallow water to deep water, which is the predominant factor in the current distribution of submarine heat flow in Qiongdongnan Basin.