Scopus记录号: 2-s2.0-84904474157
论文题名: Using airborne hyperspectral data to characterize the surface pH and mineralogy of pyrite mine tailings
作者: Zabcic N ; , Rivard B ; , Ong C ; , Mueller A
刊名: International Journal of Applied Earth Observation and Geoinformation
ISSN: 15698432
出版年: 2014
卷: 32, 期: 1 起始页码: 152
结束页码: 162
语种: 英语
英文关键词: Hyperspectral
; Mine tailings
; Mineral maps
; Oxides
; pH
; Sulfates
Scopus关键词: acid mine drainage
; airborne sensing
; map
; mineralogy
; oxidation
; oxide
; pH
; pyrite
; remote sensing
; spectral analysis
; sulfate
; tailings
; Spain
英文摘要: Acid mine drainage (AMD) is a key concern of the mining industry due to its impact on the qualityof water and soils surrounding mine waste deposits. Acid mine drainage derives from the oxidationof metal sulphides, e.g. pyrite (FeS2), exposed to oxygen and water. The leachate acidity is capable ofreleasing heavy metals contained in the mining waste rock, which can affect water quality and lead tometal enrichment in sediments and potentially resulting in ecosystem degradation. Predicting tailingsleachate pH is key to the management of sulfide-bearing mine wastes and is an emerging remote sensingapplication with limited studies having been realized. Such a capability would supplement traditionalmethods (i.e. ground surveys) that are challenging to implement due to the extent and large volume ofmine waste.This study reports regional scale tailings mineral maps generated from airborne hyperspectral infor-mation of the Sotiel-Migollas complex in Spain and pinpoints sources of AMD. The extraction of spectralendmembers from imagery revealed twenty six endmembers for tailings material that represent mostlymineral mixtures. From these, eleven spectral groups were defined, each encompassing minor variationsin mineral mixtures. The mineral maps resulting from the use of these endmembers for the detailedinvestigation of four tailings serve as indicators of the metal, sulphate, and pH levels of the AMD solu-tion at the time of mineral precipitation. Predicted mineralogy was assessed using spectra from samplescollected in the field and associated X-ray diffraction measurements.We also discuss the relative merits of the minerals maps of this study and soil leachate pH maps thatwe previously reported for the same locality using the same airborne data. The pH maps tend to providepredictions consistent with the mineralogy predicted from the mineral maps and the field and laboratoryevidence. The pH maps offer information on the pH conditions of the tailings thus giving an insight onthe different types of oxidation reactions that may occur. © 2014 Elsevier B.V. All rights reserved. 资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79658
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Earth and Atmospheric Sciences, University of Alberta, 1-26 Earth Sciences Building, Edmonton, Alberta, T6G 2E3, Canada; CSIRO Earth Science and Resource Engineering, 26 Dick Perry Avenue, 6151 Kensington, WA, Australia; DLR German Aerospace Centre, German Remote Sensing Data Centre, Münchnerstr. 20, D-82234 Wessling, Germany
Recommended Citation:
Zabcic N,, Rivard B,, Ong C,et al. Using airborne hyperspectral data to characterize the surface pH and mineralogy of pyrite mine tailings[J]. International Journal of Applied Earth Observation and Geoinformation,2014-01-01,32(1)