中国大陆水文地球化学-构造地震危险区划研究

以热水及矿水的水文地球化学场为主要标志，以构造格局和构造活动性、历史地震活动规律为主要划分依据，再结合地球物理场、地温场及区域地层的组合分布状况，进行了地震危险区带的划分。将中国大陆划分为6个地震危险区、23个危险亚区和30个危险带，并对各个危险亚区和危险带的主要水文地球化学特征及构造进行了论述。通过对地下水水文地球化学特征和水文化学场的研究，分析构造特征及其活动性，确定地震与水文地球化学特征及化学场的耦合关系。这对地震水文观测孔的布置和地震预测具有重要意义。通过长期监测地下水中水化学成分的变化，就有可能为预测预报地震提供一种新的前兆信息。

SEISMIC DANGER DIVISIONS BASED ON HYDROGEOCHEMICAL-TECTONIC CHARACTERISTICS ON THE CONTINENT OF CHINA

Seismic danger zones on the continent of China are distinguished by taking the main indices of hydrogeochemical fields of hot groundwater and mineral groundwater,tectonic framework and tectonic activities and regularity of historical seismic activities as the main criteria for the division,combined with distributions of geophysical fields,ground temperature fields and grouping of regional strata.In this paper the continent of China is divided into six seismic danger regions,23 danger subregions and 30 danger zones and the main hydrogeochemical and tectonic characteristics in various danger subregions and danger zones are dealt with.The coupling between earthquakes and the hydrogeochemical characteristics and hydrochemical field has been determined through studying the hydrogeochemical characteristics of groundwater and the hydrochemical field and analyzing the tectonic characteristics and activities.This work has great significance for the layout of earthquake and hydrological observation wells and prediction of earthquakes.Through long-term monitoring of the change of the chemical composition of groundwater,a new kind of premonitory information for earthquake prediction may be provided.