CAJ | 학술논문

地热学岩石圈厚度体现了长时间尺度上的岩石圈热学作用,可以反映地球深部动力学过程.介绍了地热学岩石圈厚度的计算方法,探讨了这种方法的参数选取和影响因素,并对比了地热学岩石圈厚度与其他类型岩石圈厚度的差异及其原因.结果表明：地热学岩石圈厚度的计算结果受地壳分层结构、岩石生热率、岩石热导率以及地表热流的影响；地质历史时期内的地壳分层结构要结合岩石学、岩石地球化学等领域最新研究成果得出；地表热流较低(42 mW·m-2)时,岩石圈地幔生热率对计算结果的影响非常显著,岩石圈地幔生热率变化0．02μW·m-3,地热学岩石圈厚度计算结果最高变化40 km,岩石圈地幔热导率每变化0．2 W·(m·K)-1,地热学岩石圈厚度变化15 km；地表热流为60 mW·m-2时,岩石圈地幔生热率每变化0．02μW·m-3,地热学岩石圈厚度变化3 km,岩石圈地幔热导率每变化0．2 W·(m·K)-1,地热学岩石圈厚度变化5 km；地表热流增高1 mW·m-2,地热学岩石圈厚度约增加3 km；地热学岩石圈厚度与岩石学、地震学岩石圈厚度略有差异,其差异取决于流变边界层的厚度.
지열학암석권후도체현료장시간척도상적암석권열학작용,가이반영지구심부동역학과정.개소료지열학암석권후도적계산방법,탐토료저충방법적삼수선취화영향인소,병대비료지열학암석권후도여기타류형암석권후도적차이급기원인.결과표명：지열학암석권후도적계산결과수지각분층결구、암석생열솔、암석열도솔이급지표열류적영향；지질역사시기내적지각분층결구요결합암석학、암석지구화학등영역최신연구성과득출；지표열류교저(42 mW·m-2)시,암석권지만생열솔대계산결과적영향비상현저,암석권지만생열솔변화0．02μW·m-3,지열학암석권후도계산결과최고변화40 km,암석권지만열도솔매변화0．2 W·(m·K)-1,지열학암석권후도변화15 km；지표열류위60 mW·m-2시,암석권지만생열솔매변화0．02μW·m-3,지열학암석권후도변화3 km,암석권지만열도솔매변화0．2 W·(m·K)-1,지열학암석권후도변화5 km；지표열류증고1 mW·m-2,지열학암석권후도약증가3 km；지열학암석권후도여암석학、지진학암석권후도략유차이,기차이취결우류변변계층적후도.
Geothermal lithospheric thickness reflects the thermal effect of lithosphere in long-time scale and the deep dynamic processes of earth.Calculation method of geothermal lithospheric thickness was introduced, preference selection and influencing factors of the method were discussed,and the differences of geothermal and other lithospheric thicknesses and their reasons were compared.The results show that calculation result of geothermal lithospheric thickness is influenced by crustal layered structure,heat generation rate and thermal conductivity of rock and surface heat flow;crustal layered structure in geological history should be speculated according to the newest research findings in petrology,petrogeochemistry,etc.;effect of heat generation rate of lithospheric mantle on the calculation result of geothermal lithospheric thickness is very significant when the surface heat flow is low (42 mW·m-2 ),change of 0.02μW·m-3 for heat generation rate of lithospheric mantle has a maximum effect on the calculated results with the change of 40 km,and change of 0.2 W·(m·K)-1 for thermal conductivity of lithospheric mantle results in the change of 15 km;when surface heat flow is 60 mW·m-2 ,change of 0.02μW· m-3 for thermal conductivity of lithospheric mantle results in the change of 3 km,and change of 0.2 W·(m·K)-1 for thermal conductivity of lithospheric mantle results in the change of 5 km;when surface heat flow increases 1 mW·m-2 ,the geothermal lithospheric thickness increases 3 km;geothermal lithospheric thickness has slightly differences with petrological and seismological lithospheric thickness,and the differences depend on the thickness of rheological boundary layer.