摘要
统地测制了从基底到盖层两条基干剖面，分析了上地壳不同构造层各岩类Ｕ，Ｔｈ．Ｋ自发裂变产热元素的质量分数，计算出各结构层热流值、各层配分比例及温度分布；对于下地壳，则利用地震波速与热产率、热流和温度分布的相关性进行了估算，从而建立起长江中下游地区地壳热结构模型。长江中下游地壳热流（ｑｃ）为３１．２７－３２．１７ｍＷ·ｍ２，占地表热流的５０．８％～５３．６９％；下地壳在整个地壳热流值中所占比例最小（约３．０％－７．５％）；
Heat flow constitution of structure layers and temperature distrbution in the upper crust werecalculated,based onthesystematic survey of two main geological profiles whichbreak through from the base-ment tothecover and analyses of spontaneous fission heat production elements including U,Th and K.Heat flow and temperature distribution in the lower crust were also estimated using the relationof seismic event ve-locity withheat productionrate.According to the calculations and the estimations,thermal structure model of crust was builtin middle and lowerareas of Yangtze River.Crust heat flow(qc)is 31.27-32.17mW·m-2in middle and lowerareas of Yangtze River,which makesup 50.8-53.6 percent of the surface heat flowLower crustheat flow is small in proportion tothecrust heat flow,while mantle heat flow(qm)accounts for onehalf ofsurfaceheat flow
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
1997年第1期62-64,共3页
Earth Science-Journal of China University of Geosciences
基金
国家"八.五"科技攻关项目和国家自然科学基金
关键词
地壳
热结构
热流
长江中下游
地热流
thermal structureof curst,heat flow,middle and lowerreachesof Yangtze river.
