Using Imaging Spectroscopy To Map Acidic Mine Waste
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- 作者：Gregg A. Swayze ; Kathleen S. Smith ; Roger N. Clark ; Stephen J. Sutley ; Ronald M. Pearson ; J. Sam Vance ; Philip L. Hageman ; Paul H. Briggs ; Allen L. Meier ; Michael J. Singleton ; and Shelly Roth
- 刊名：Environmental Science & Technology
- 出版年：2000
- 出版时间：January 1, 2000
- 年：2000
- 卷：34
- 期：1
- 页码：47 - 54
- 全文大小：1525K
- 年卷期：v.34,no.1(January 1, 2000)
- ISSN：1520-5851
文摘
The process of pyrite oxidation at the surface of minewaste may produce acidic water that is gradually neutralizedas it drains away from the waste, depositing different Fe-bearing secondary minerals in roughly concentric zonesthat emanate from mine-waste piles. These Fe-bearingminerals are indicators of the geochemical conditions underwhich they form. Airborne and orbital imaging spectrometerscan be used to map these mineral zones because eachof these Fe-bearing secondary minerals is spectrally unique.In this way, imaging spectroscopy can be used torapidly screen entire mining districts for potential sourcesof surface acid drainage and to detect acid producingminerals in mine waste or unmined rock outcrops. Spectraldata from the AVIRIS instrument were used to evaluatemine waste at the California Gulch Superfund Site nearLeadville, CO. Laboratory leach tests of surface samples showthat leachate pH is most acidic and metals most mobilein samples from the inner jarosite zone and that leachatepH is near-neutral and metals least mobile in samplesfrom the outer goethite zone.