可控源音频大地电磁法深部找矿实验效果
张国鸿,李仁和
安徽省地球物理地球化学勘查技术院,安徽 合肥230022
THE TEST RESULT OF THE CONTROLLED SOURCE AUDIOFREQUECY
MAGNETOTELLURIC METHOD IN THE PROSPECTING FOR DEEP ORE DEPOSITS
ZHANG Guo-Hong, LI Ren-He
Institute of Geophysical and Geochemical Prospecting Technology of Anhui Province, Hefei230022, China
摘要 为了考查电磁法在探测深部金属矿及地质构造方面的实际效果,用可控源音频大地电磁法分别在埋深为500 m和1 100 m的两个已知隐伏铁、
铜矿体上进行了实验工作。实验结果表明地电异常显示了矿体、断层以及岩层接触带的分布。在矿体埋藏深度小于500 m、矿层较厚时,地电异常十
分明显;若矿体埋藏深度大于1 000 m,地电异常主要反应了控矿、容矿构造。
Abstract :To examine the actual result of the electricmagnetic method in detecting deep metallic ore deposits and structures,
the authors conducted two tests in two known buried iron and copper ore deposits by using Controlled Source Audiofrequency
Magnetotelluric Method (CSAMT). The two known ore bodies have the buried depths of about 500 m and 1 100 m, respectively. The
results of the tests show that the geoelectrical anomalies can indicate the distribution of ore bodies, faults and lithologic
contact zones. When the buried depth of the ore body is less than 500 m and the ore bed is relatively thick, the geoelectrical
anomaly is very obvious. When the buried depth of the ore body is more than 1 000 m, the geoelectrical anomaly mainly reflects
the orecontrolling and orehosting structure.
出版日期: 2010-02-10
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