Variability of magnetic soil properties in Hawaii

被引：4

作者：

van Dam, RL ^{[1
]}

Harrison, JBJ ^{[1
]}

Hendrickx, JMH ^{[1
]}

Borchers, B ^{[1
]}

North, RE ^{[1
]}

Simms, JE ^{[1
]}

Jasper, C ^{[1
]}

Smith, CW ^{[1
]}

Li, YG ^{[1
]}

机构：

[1] New Mexico Inst Min & Technol, Dept E&ES, Socorro, NM 87801 USA

来源：

Detection and Remediation Technologies for Mines and Minelike Targets X, Pts 1 and 2 | 2005年 / 5794卷

关键词：

land mine detection; UXO detection; iron oxides; magnetic soils; soil development; Hawaii;

D O I：

10.1117/12.602876

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetic soils can seriously hamper the performance of electromagnetic sensors for the detection of buried land mines and unexploded ordnance (UXO). Soils formed on basaltic substrates commonly have large concentrations of ferrimagnetic iron oxide minerals, which are the main cause of soil magnetic behavior. Previous work has shown that viscous remanent magnetism (VRM) in particular, which is caused by the presence of ferrimagnetic minerals of different sizes and shapes, poses a large problem for electromagnetic surveys. The causes of the variability in magnetic soil properties in general and VRM in particular are not well understood. In this paper we present the results of laboratory studies of soil magnetic properties on three Hawaiian Islands: O'ahu, Kaho'olawe, and Hawaii. The data show a strong negative correlation between mean annual precipitation and induced magnetization, and a positive correlation between mean annual precipitation and the frequency dependent magnetic behavior. Soil erosion, which reduces the thickness of the soil cover, also influences the magnetic properties.

引用

页码：157 / 164

页数：8

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