燕山中部大地热流及岩石圈热结构特征——以承德市七家-茅荆坝地热田为例  

Terrestrial heat flow and lithospheric thermal structure in the middle Yanshan region——a case study from the Qijia-Maojingba geothermal field in Chengde

作　　者：刘峰[1,2,3] 王贵玲 张薇[1,3] 岳晨 陆川[1,3] 黄起伟 欧小科[5] LIU Feng;WANG Guiling;ZHANG Wei;YUE Chen;LU Chuan;HUANG Qiwei;OU Xiaoke(The Institute of Hydrogeology and Environmental Geology,Chinese Academy of Geological Sciences,Shijiazhuang,050061;China University of Geosciences(Beijing),Beijing,100083;Technology Innovation Center of Geothermal&Hot Dry Rock Exploration and Development,Ministry of Natural Resources,Shijiazhuajig,050061;East China University of Technology,Nanchang330000;Shenzhen Municipal Design and Research Institute Co.LTD,Shenzhen,Guangdong518000)

机构地区：[1]中国地质科学院水文地质环境地质研究所,石家庄050061 [2]中国地质大学(北京),北京100083 [3]自然资源部地热与干热岩勘查开发技术创新中心,石家庄050061 [4]东华理工大学,南昌330000 [5]深圳市市政设计研究院有限公司,广东深圳518000

出　　处：《地质学报》2020年第7期1950-1959,共10页Acta Geologica Sinica

基　　金：中国地质调查局地质调查项目(编号DD20190128、DD20160190)资助的成果。

摘　　要：燕山中部地区地热资源丰富,地热地质条件较好,但该地区大地热流测量工作较少,岩石圈热结构研究尚未开展,制约了该地区的地热地质研究与资源勘探开发。本文以该地区的七家-茅荆坝地热田为典型区,结合地温测井、取样测试、数据收集与分析,初步查明燕山中部大地热流特征及浅部-深部岩层热物性特征,填补了大地热流值测量空白区,在此基础上建立了研究区热结构概念模型,估算其深部地温分布。研究得出燕山中部大地热流值变化较大,平均约57 mW/m^2,与周边温泉水温存在较好的相关关系。其中七家-茅荆坝地热田大地热流值较高,为74.9 mW/m^2。通过深部地温分布计算得出七家—茅荆坝地区居里面埋深为21.5~22.8 km,莫霍面温度约815℃,分析结果与前人研究成果较为一致,验证了本文所建立岩石圈热结构模型的准确性。The Middle Yanshan region in the north of the Hebei province is rich in geothermal resources.However,the absence of research on the terrestrial heat flow and lithosphere thermal structure seriously restricts the exploitation and utilization of thermal resources.This paper studies the physical parameters and heat flow in the shallow and deep rocks encompassing the Qijia-Maojingba geothermal field.Based on this data a conceptual lithospheric thermal structure model is established and information on heat flow is obtained.It is found that there is a good correlation between terrestrial heat flow(an average of about 57 mW/m^2)and the temperature of the surrounding hot springs in the middle Yanshan Region.The terrestrial heat flow in the Qijia-Maojingba area is about 74.9 mW/m^2,which is the highest in the Yanshan Region.With the one-dimentional steady state thermal conduction formula,the temperature at different depths is calculated in the Qijia-Maojingba geothermal field.The depth of Curie surface is about 21.5~22.8 km with a temperature of 570~600℃,and the Moho temperature of about 815℃.Most of the analysis results presented above are consistent with previous research findings in the research area and its vicinity,confirming the reliability of the lithospheric thermal structure model established in this study.

关 键 词：燕山地区 七家-茅荆坝地热田 大地热流 岩石圈热结构 居里面 

分 类 号：P314[天文地球—固体地球物理学]