地质构造对黄河下游(河南段)地热分布的影响分析

Analysis of the Influence of Geological Structure on Geothermal Distribution in Lower Reaches of the Yellow River in Henan Province

河南省黄河下游是地热开发利用程度较高的区域,由于在开发过程中对地热资源的时空分布及形成规律了解不透彻而引发了诸多环境地质问题。为此,首先以区域地热地质调查资料为基础,从地质构造与地热形成相关性的角度出发,分析研究了该区域活动断裂构造对热储温度分布的影响及其与地热分布的关系。结果表明,河南省黄河下游地热分布主要受近东西向和北东向断裂控制,主要分布于不同方向断裂交汇部位,区域上沿东西向断裂分布。其次,依据地热异常与活动断裂构造关系,结合地热异常形成的机理,划分了三级地热异常区。最后,对河南省黄河下游区域地热开发利用提出两点建议:将黄河两岸的郑州市古荥—柳林一带、新乡市西南大召营—朗公庙一带、封丘县城南部和兰考县西部作为重点勘探开发前景区;地热开发利用时首先考虑那些位于构造体系主干断裂两侧及其与其他断裂构造交汇的区域。

The lower reaches of the Yellow River in Henan Province is an area with a high degree of geothermal development and utilization.Due to the incomplete understanding of the temporal and spatial distribution and formation of geothermal resources during the development process,many environmental geological problems have been triggered.Therefore,based on the regional geothermal geological survey data and from the point of view of the correlation between geological structure and geothermal formation,the influence of active fault structure on thermal storage temperature distribution and its relationship with geothermal distribution are analyzed and studied.The results are as follows.Firstly,the geothermal distribution in lower reaches of the Yellow River in Henan Province is mainly controlled by nearly east-west and north-east faults,which are mainly located at the intersection of faults in different directions,and distributed along east-west faults in the region.Secondly,based on the relationship between geothermal anomalies and active fault structures,combined with the formation mechanism of geothermal anomalies,a three-level geothermal anomaly zone is divided.Thirdly,two suggestions are put forward for geothermal exploitation and utilization in lower reaches of the Yellow River in Henan Province.The Guxing to Liulin area in Zhengzhou City,the Dazhaoying to Langgongmiao area in southwest Xinxiang City,the southern part of Fengqiu County and the western part of Lankao County on the both sides of the Yellow River should be the key prospects for exploration and development.Before the circumstance of the development and utilization of geothermal energy,the areas on both sides of the main faults of the structural system and their intersection with other faults should be considered first.