辽河盆地东部凹陷大地热流

Heat Flow in the Eastern Subdepression of Liaohe Basin

辽河盆地是一个中、新生代断陷盆地 ,具有“三凹三凸”的构造格局 .依据 1 2口系统测温井数据和 47块岩石热导率测试结果 ,计算了东部凹陷 1 2个高质量的大地热流数据 .东部凹陷地温梯度变化于 1 0～ 5 0℃/km之间 ,岩石热导率变化于 0 81 9～ 2 91 4W /m·K之间 ,平均 1 667W/m·K ,热流值变化于 45 7～ 70 0× 1 0 - 3W/m2 之间 ,平均为5 6 1 (± 6 98)× 1 0 - 3W/m2 .热流分布的格局是古潜山带和斜坡带高于洼陷区 .

The Liaohe Basin is a Meso Cenozoic faulting depression basin,characterized by tectonic framework of “three subdepressions and three uplifts”. Based on temperature measurements in 12 wells and thermal conductivity determinations of 47 rock samples,12 heat flow values were calculated for the Eastern Subdepression. The geothermal gradient ranges from 10℃/?Km to 50℃/?Km. The rock thermal conductivity ranges from 0.819 W/?m·k to 2.914 W/?m·k. Ranging from 45.7 mW/?m 2 to 70.0 mW/?m 2,the mean of these 12 heat flow values exhibits 56.1±6.98 mW/?m 2. The heat flow in the uplift and ramp is greater than that in the sag.