松辽盆地地幔热流的演化特征
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摘要
本文根据松辽盆地沉积岩层中的放射性元素（Ｕ、Ｔｈ、４０Ｋ）含量以及地震波速，计算了盆地各岩层放射性生热率，然后，采用＂剥层法＂从地表开始，自上而下，由浅入深地扣除盆地在不同演化阶段各岩层提供的热量，从而得出地质年代地幔的热流值，并在此基础上，探讨了地幔热流演化与盆地构造发展的关系。
According to radioactive element abundance of sedimentary rocks and seismic wave velocity in Songliao basin, radioactive heat generated per unit volume in rocks is calculated.And based on surface heat flux of the crust, mantle heat flux in the past geological period is obtained by reducing, from shollow layer to deep layer of the crust,heat flow of each layer generated during basin evolution. On the basis of the above-caculated results,the relation between evolution of mantle heat flux and tectonic development is discussed.
According to radioactive element abundance of sedimentary rocks and seismic wave velocity in Songliao basin, radioactive heat generated per unit volume in rocks is calculated.And based on surface heat flux of the crust, mantle heat flux in the past geological period is obtained by reducing, from shollow layer to deep layer of the crust,heat flow of each layer generated during basin evolution. On the basis of the above-caculated results,the relation between evolution of mantle heat flux and tectonic development is discussed.
引文
1982RybachLandBunterbarthG．EarthPlanet，Sci．Lett，Vol．57：367～3761982刘耀光．松辽盆地地热场特征与油气勘探关系，石油勘探与开发，第三期1984RybachLandBunterbarthG．Tectonophysics，Vol．103：335～3441985吴乾蕃等．松辽盆地大地热流．地震地质，7（2）1986汪集等．辽河裂谷盆地地幔热流．地球物理学报，29（5）1989Cermak，V．andRybach，L．．Tectonophysic，Vol．159：2172301990王钧等．中国地温分布的基本特征，地震出版社
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