Bulk scanning method of a heavy metal concentration in tailings of a gold mine using SWIR hyperspectral imaging system

被引：22

作者：

Jeong, Yongsik ^{[1
]}

Yu, Jaehyung ^{[2
]}

Wang, Lei ^{[3
]}

Lee, Kwang-Jae ^{[1
]}

机构：

[1] Korea Aerosp Res Inst KARI, Natl Satellite Operat & Applicat Ctr, 169-84 Gwahak Ro, Daejeon 34133, South Korea

[2] Chungnam Natl Univ, Dept Geol Sci, 99 Daehak Ro, Daejeon 34134, South Korea

[3] Louisiana State Univ, Dept Geog & Anthropol, Baton Rouge, LA 70803 USA

来源：

INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION | 2021年 / 102卷

基金：

新加坡国家研究基金会;

关键词：

SWIR hyperspectral imaging; Heavy metal concentration; Mine tailing; Bulk scanning; Spectroscopy; REPUBLIC-OF-KOREA; COMBINED GEOCHEMISTRY; FIELD SPECTROSCOPY; SOIL CONTAMINATION; FLUID INCLUSION; MINING DISTRICT; STABLE-ISOTOPE; VEIN DEPOSITS; MINERALIZATION; AREA;

D O I：

10.1016/j.jag.2021.102382

中图分类号：

TP7 [遥感技术];

学科分类号：

081102 ; 0816 ; 081602 ; 083002 ; 1404 ;

摘要：

This work introduces a bulk data acquisition method using a hyperspectral imaging system (HIS) to measure chromium (Cr) concentration in the soil samples obtained from tailings of a gold mine considering of the spectral competition between heavy metal elements. The chemical, mineralogical, and spectroscopic analyses in a laboratory environment revealed that heavy metal elements' competitive geochemical behaviors were manifested as spectral competitions between heavy metal elements in tailings. The heavy metal elements can be classified into two groups based on their geochemical behaviors: chromium-nickel (Cr-Ni) and zinc-arsenic-cadmium-lead (ZnAs-Cd-Pb). We found an inverse relationship between the two groups in their spectral absorption depth changing patterns, possibly caused by their competition in bonding with the agent minerals. The prediction model of Cr concentrations in the tailing samples using a short-wave infrared (SWIR) HIS was developed from the sample data analysis. The imaging model of Cr concentration is statistically significant with R-2 = 0.7 and NRMSE = 11% to 12%. The future use of HIS for massive data acquisition of heavy metal concentration in a natural environment is made possible with such pilot spectroscopic analyses presented in this work.

引用

页数：11