摘要
地球物理方法在固体矿产,尤其是多金属矿产的勘查中得到广泛的应用。由于多金属矿床通常具有高密度、良导电性和强磁性(尤其是矽卡岩类型中赋存的磁性矿床),因而广泛应用重、磁、电方法寻找这类矿产。本文应用高精度磁法和时间域激发极化法对浙江省小梅多金属矿区进行综合研究,并以C7异常区为例,通过磁异常定量计算得到引起C7磁异常的磁性多金属矿体顶板埋深约2m,厚7.28m,磁性体的倾角为60°,倾向306°45′,这个结果与已经探明的小梅铅锌矿的产状相吻合,进而说明综合磁法和电法是本区多金属矿产勘查的有效手段。
Geophysical methods are widely used in solid minerals, especially in polymetallic mineral prospecting. The polymetallic deposit generally has a high density, good electrical conductivity and ferromagnetism （especially the magnetic mineral deposit which is in the skam）,. So the methods of gravity, magnetic and electricity are widely used to search for the mineral. In this paper, the authors adopt the high--precision geomagnetic method and the time--domain induced polarization method to make a synthetic study on Xiaomei polymetallic deposit in Zhejiang, and taking C7 magnetic anomaly area as a case, by the inversion calculation of the magnetic anomaly, we obtain that the magnetic polymetallic mineral which causes the C7 magnetic anomaly is approximately 2 meters high between the body roof and the ground surface, the thickness is 7.28 meters, the rake is 60° and the dip direction is 306°45＇. This result is similar to the occurrence of the known lead--zinc deposits of Xiaomei polymetallic deposit. Thus it suggests that the combination of the two geophysical methods is quite useful in the exploration of ploymetallc ore deposits.
出处
《工程地球物理学报》
2008年第4期464-469,共6页
Chinese Journal of Engineering Geophysics
关键词
高精度磁测
时间域激发极化法
磁异常定量解释
多金属矿床
high prectsion magnetic
time--domain induce polarization
magnetic anomaly interpretation
polymetallic deposit
