华北平原地下热水形成条件与赋存特征

本文分两部分,第一部分扼要评述华北平原地质条件与地热背景,指出华北平原具盆地地质结构,和具有较高的区域热流与较高地温梯度背景,二者的结合有利于地下热水的形成与富集。第二部分对本区三大热水层组(上第三系、下第三系、震旦系及下古生界)分别进行评述,结合上下第三系建造,岩相类型沉积介质条件以及震旦系与下古生界碳酸盐岩岩溶发育特征分析研究了各热水层组的特点。指出上第三系热水层与岩溶层热水作为地热能资源利用有实际意义,在开发条件上,古潜山地段比较优越。

ON THE FORMATION AND ACCUMULATION OF THERMAL WATER IN NORTH CHINA PLAIN

North China Plain geologically is a large-scale Mz-Cz basin of faulting-depression origin, which developed on the Palaeozoic basement. Geothermal studies indicate that North China Plain is characterized by relatively high heat flow and geothermal gradient compared with similar tectonic unit in other parts of the World. The combination of relatively high geothermal background and the structure of faulting-depression basin is suitable for the formation and ccuamulation of thermal water in the region studied. Altogether thfee aquifers have been recognized, they are: namely I) Upper Tertiary, 2) Lower Tertiary and 3) Lower Palaeozoic and Sinian. Analysis and evaluation of thermal water in these three aquifers have been given in detail in this paper. The thermal water in Upper Tertiary and Lower Paleozoic and Sinian aquifers is considered to be the most potential geothermal resources for practical use in the vast rural area of North China Plain. Thermal water in Lower Paleozoic and Sinian aquifer appears to be in good condition for exploitation.