摘要
勘查区位于攀枝花市米易县,为沉积变质型典型石墨矿。为了大致查明勘探线深部的异常分布、规模、形态、强度等特征,开展了自电电位梯度测量和音频大地电磁测深工作。自电电位梯度测量可以圈定平面自电电位梯度异常,而后在此异常范围内布设音频大地电磁测深剖面。由于勘查区内的石墨矿比围岩电阻率低,两种方法结合,勘探效果良好。经过钻孔验证,自电电位梯度测量和音频大地电磁测深法的勘查成果准确可靠,可在类似石墨矿勘查中进一步推广应用。
This exploration area is located in Miyi County of Panzhihua City.It is a sedimentary metamorphic type of graphite ore.In order to roughly identify the anomalous distribution,scale,shape and strength of the deep part of the exploration line,the author carried out self-electric potential gradient measurement and audio magnetotelluric sounding.The self-electric potential gradient measurement can delineate the plane self-electrical potential gradient anomaly.It arranges the audio magnetotelluric sounding profile in this abnormal range.Since the graphite ore in this exploration area has a lower resistivity than the surrounding rock,the combination of the two methods has a good exploration effect.After the drilling data verification,the self-electric potential gradient measurement and the audio magnetotelluric sounding method are accurate and reliable.It can be further promoted and applied in similar graphite ore exploration.
作者
王光洪
颜长宁
郑晓旭
万平益
周勇
彭召强
刘玉红
WANG Guanghong;YAN Changning;ZHENG Xiaoxu;WAN Pingyi;ZHOU Yong;PENG Zhaoqiang;LIU Yuhong(No. 605 Brigade of Sichuan Metallurgical Geological Exploration Bureau, Meishan, Sichuan 620860, China)
出处
《中国锰业》
2020年第2期56-59,共4页
China Manganese Industry
基金
四川省地质勘查基金项目([2017]310号)。
关键词
自然电场法
AMT
石墨矿
Natural electric field method
AMT
Graphite ore