郑州南地热田重磁电异常特征

GRAVITY,GEOMAGNETIC AND ELECTRIC ANOMALY FEATURES OF THE GEOTHERMAL FIELD IN THE SOUTH OF ZHENGZHOU CITY

利用重、磁、电综合物探勘测研究了郑州南浅层地热田。该地热田有明显的重磁电异常；重力场沿断裂呈现出条带状或串珠状的异常特征；浅层热源区有着明显的强负磁异常，深层热源区在区域地磁场上有弱负磁异常显示；热源区上部有低电阻率异常显示。本文还对郑州市深浅热源区的边界及其异常特征做了初步推断和解释。

The shallow geothermal field in the south of Zhengzhou has been studied using integrated geophysical method of gravitative,magnetic and electrical survey. The geothermal fieldshows obviously gravitative,magnetic and electrical anomalies: the gravity field appears thebelt-or beaded-shape anomaly along the fault,there exits strong negative magnetic anomaly in the shallow geothermal source area,but in the regional terrestrial magnetic field of thedeep geothermal source area there exists weak negative magnetic anomaly,and in the upperpart of geothermal source area the low resistivity anomaly appears. The authors infer and interpret preliminarily the boundary of deep and shallow geothermal source areas of Zhengzhouand its anomaly preperty in this paper.