CAJ | 학술논문

盆地的稳态温度是分析地温场和大地热流的基础,是盆地构造热演化的必要前提.本文根据最新获得的9口钻井的稳态温度数据和124块岩石热导率,结合已有资料对江汉盆地地温梯度和大地热流进行了系统分析.结果显示江汉盆地热流41.9～60.9 mW/m~2,平均52.3mW/m~2,盆地总体表现为较低的大地热流,反映了中新生代以来构造活动逐渐减弱,盆地不断冷却的结果;从盆地内热流分布看,热流分布南高北低,反映了江汉盆地构造活动的不均一性.
분지적은태온도시분석지온장화대지열류적기출,시분지구조열연화적필요전제.본문근거최신획득적9구찬정적은태온도수거화124괴암석열도솔,결합이유자료대강한분지지온제도화대지열류진행료계통분석.결과현시강한분지열류41.9～60.9 mW/m~2,평균52.3mW/m~2,분지총체표현위교저적대지열류,반영료중신생대이래구조활동축점감약,분지불단냉각적결과;종분지내열류분포간,열류분포남고북저,반영료강한분지구조활동적불균일성.
Based on the newly obtained borehole steadY temperature data from 9 holes together with thermal conductivities of 124 core samples,we analyze the distribution of geotemperature and terrestrial heat flow in Jianghan Basin.The present temperature gradients vary from 28.36 to 39.32 ℃/km,lower temperature gradients is observed in the Cenozoic Basin margin and higher gradients are obtained in the Cenozoic Basin.The determined thermal conductivity values vary 41.9 to 60.9 mW/m~2,with a average of 52.3 mW/m~2.It shows that the influence of tectonothermal event before Cenozoic in Jianghan Basin has faded away,and the basin has cooled down.