Heat Shielding Effects in the Earth＇s Crust  

作　　者：Yixian Xu Lupei Zhu Qinyan Wang Yinhe Luo Jianghai Xia 

机构地区：[1]School of Earth Sciences, Zhejiang University, Hangzhou 310027, China [2]State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China [3]Hubei Subsurface Multi-Scale lmaging Key Laboratory, Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan 430074, China [4]Department of Earth and Atmospherie Sciences, Saint Louis University, St. Louis MO 63103, USA [5]School of Earth Sciences, China University of Geosciences, Wuhan 430074, China

出　　处：《Journal of Earth Science》2017年第1期161-167,共7页地球科学学刊（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos.41530319,41374079,41374060);the State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences (No.MSFGPMR201309)

摘　　要：Knowledge of heat flow and associated variations of temperature with depth is crucial for understanding how the Earth functions. Here, we demonstrate possible heat shielding effects that result from the occurrence of mafic intrusions/layers（granulitic rocks） within a dominantly granitic middle crust and/or ultramafic intrusions/layers（peridotitic rocks） within a dominantly granulitic lower crust; heat shielding is a familiar phenomenon in heat engineering and thermal metamaterials. Simple one-dimensional calculations suggest that heat shielding due to the intercalation of granitic, granulitic and peridotitic rocks will increase Moho temperatures substantially. This study may lead to a rethinking of numerous proposed lower crustal processes.Knowledge of heat flow and associated variations of temperature with depth is crucial for understanding how the Earth functions. Here, we demonstrate possible heat shielding effects that result from the occurrence of mafic intrusions/layers（granulitic rocks） within a dominantly granitic middle crust and/or ultramafic intrusions/layers（peridotitic rocks） within a dominantly granulitic lower crust; heat shielding is a familiar phenomenon in heat engineering and thermal metamaterials. Simple one-dimensional calculations suggest that heat shielding due to the intercalation of granitic, granulitic and peridotitic rocks will increase Moho temperatures substantially. This study may lead to a rethinking of numerous proposed lower crustal processes.

关 键 词：GEOTHERM crustal laminated structure heat shielding heat conductivity peridotitic in-trusions North Tibet magnetotelluric data. 

分 类 号：P313[天文地球—固体地球物理学]