阿坝—简阳地学剖面深部温度及热结构  

Difference of thermal structure between eastern edge of Tibet Plateau and weasten Sichuan Basin

作　　者：徐明[1,2] 朱传庆[1] 饶松[1,2] 胡圣标[1] 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029 [2]中国科学院研究生院,北京100049

出　　处：《地质科学》2011年第1期203-212,共10页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家重点基础研究发展计划"973"项目(编号:2005CB422101);国家自然科学基金项目(编号:41072186)资助

摘　　要：在青藏高原东部到四川盆地这两个构造单元进行了稳态钻孔温度测量和岩石热导率测试,确定了相应钻孔的大地热流数据。应用这些可靠的热流数据,对横穿这两个构造单元的阿坝—简阳地学断面进行了2-D温度场研究,获得其深部热结构的认识。模拟结果显示,松潘—甘孜地块地表为高热流区域,达到80～110mW/m^2,四川盆地地表为中低热流区域,为50～60mW/m^2。莫霍面的温度有较大变化,松潘—甘孜地块为1100～1210℃,四川盆地西部减小为750～820℃。热岩石圈表现为西部向东部变厚,松潘—甘孜厚度为120～130km,四川盆地西部增加到130～140km。Based on the newly obtained data of borehole steady temperature logging and the thermal conductivities values, we determine the corresponding heat flow data of the eastern Tibetan Plateau and the Sichuan Basin. Application of these reliable heat flow data,we analyze the two tectonic units with 2-D 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 ~C in Songpan-Ganzi block,from 750 -820 ~C in western Sichuan. The hot lithosphere thickens is about 120 -130 km in Songpan-Ganzi block,increase to 130 140 km in western Sichuan Basin.

关 键 词：青藏高原东缘 四川盆地 大地热流 地学断面 温度场 热结构 热岩石圈 

分 类 号：P542[天文地球—构造地质学] P514.2[天文地球—地质学]