Difference of Thermal Structure between Eastern Edge of Tibetan Plateau and Western Sichuan Basin
详细信息
- 责任者：Xu Ming (Institute of Geology and Geophysics ; Chinese Academy of Sciences ; Beijing 100029 ; China) ; Zhu Chuanqing
- 刊名：Chinese Journal of Geology
- 出版年：2011
- 卷期：46(1)
- 关键词：热流 ; heat flow ; 四川盆地 ; Sichuan Basin
- 页码：p.203-212
- 图表：4 illus., 3 tables, 23 refs.
- 分类号：0400
- issnNo：ISSN0563-5020
- isbnNo：CN11-1937/P
摘要
Based on the newly obtained data of borehole steady temperature logging and the thermal conductivities values, the authors determine the corresponding heat flow data of the eastern Tibetan Plateau and the Sichuan Basin. Application of these reliable heat flow data, the authors analyze the two tectonic units with 2D temperature field along the Aba-Jianyang geoscience transect to understand the deep thermal structure. The results show that the Songpan-Ganzi block have high surface heat flow values, range from 80 to 110 mW/m2, the surface heat flow in Sichuan Basin are low to medium, range from 50~60 mW/m2. Moho temperature have a great change, vary from 1 100 ~ 1 210 ℃ in Songpan-Ganzi block, from 750~820 ℃ in western Sichuan Province. The hot lithosphere thickens is about 120 ~130 km in Songpan-Ganzi block, increase to 130~140 km in the western Sichuan Basin.