山东国土资源2024，Vol.40Issue(6)：1-10,10.DOI:10.12128/j.issn.1672-6979.2024.06.001
鲁北平原阳信地区地热田地热地质特征及地热流体化学特征
Geothermal Geological Characteristics and Geothermal Fluid Chemical Characteristics of Geothermal Fields in Yangxin Area in Lubei Plain
摘要
Abstract
Yangxin area in Shandong province is located in Huimin depression on the tectonic unit.Its northern edge is Wudi depression and the eastern edge is Zhanhua depression.The area is mainly charac-terized by subsidence tectonic movement,thick sedimentary strata of Paleogene,Neogene and Quaternary have been formed,and favorable conditions for the formation of geothermal resources have been created.6 construction boreholes have been drilled in Yangxin area,and all revealled hot mineral water of Guantao formation.The water temperature is 48～53 ℃,which belongs to warm water type geothermal resource.As showed by geothermal fluid chemistry,geothermal fluid in Yangxin area is saline water.Hydrochemi-cal type is Cl-Na type.The concentration standards of metasilicic acid,strontium,and lithium in geo-thermal water can reach medical value.It can be used as therapeutic mineral water.Analysis of Na-K-Mg ions at various points shows that geothermal water belongs to partially equilibrium water,and dissolu-tion is still ongoing.Geothermal isotopes of 8 18 O and δ2 H are close to the atmospheric precipitation line.It is indicated that hot water in the area originates from atmospheric precipitation.The estimation results of SiO2 temperature scale for thermal storage temperature indicate that the temperature of quartz is 53.22～66.66 ℃,the average geothermal gradient is 3.50 ℃/100m,and the estimated depth of thermal cycle is 1146～1530 m.关键词
地热地质特征/地热流体化学特征/热储温度/阳信地区/鲁北平原Key words
Geothermal and geological characteristics/chemical characteristics of geothermal fluids/reser-voir temperature/Yangxin area/Lubei plain分类
天文与地球科学引用本文复制引用
王琪,秦宇,尹俊凯,李友,迟鹏,胥文军..鲁北平原阳信地区地热田地热地质特征及地热流体化学特征[J].山东国土资源,2024,40(6):1-10,10.基金项目
山东省自然资源厅,山东省阳信县东部地区地热资源调查项目,项目编号:鲁勘字[2020]41号 （）
山东省煤田地质局,惠民地热田馆陶组砂岩热储优质地热水富集机理研究,项目编号:鲁煤地科字[2023]6号 （）
