Kinetics of selenium release in mine waste from the Meade Peak Phosphatic Shale, Phosphoria Formation, Wooley Valley, Idaho, USA

Lisa L. Stillings; Michael C. Amacher

Treesearch

Kinetics of selenium release in mine waste from the Meade Peak Phosphatic Shale, Phosphoria Formation, Wooley Valley, Idaho, USA

Formally Refereed

Authors:

Lisa L. Stillings, Michael C. Amacher

Year:

2010

Type:

Miscellaneous Publication

Station:

Rocky Mountain Research Station

Source:

Chemical Geology. 269: 113-123.

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Abstract

Phosphorite from the Meade Peak Phosphatic Shale member of the Permian Phosphoria Formation has been mined in southeastern Idaho since 1906. Dumps of waste rock from mining operations contain high concentrations of Se which readily leach into nearby streams and wetlands. While the most common mineralogical residence of Se in the phosphatic shale is elemental Se, Se(0), Se is also an integral component of sulfide phases (pyrite, sphalerite and vaesite-pyritess) in the waste rock. It may also be present as adsorbed selenate and/or selenite, and FeSe2 and organo-selenides.

Keywords

selenium, oxidation kinetics, leaching, black shale, marine shale, Phosphoria Formation

Citation

Stillings, Lisa L.; Amacher, Michael C. 2010. Kinetics of selenium release in mine waste from the Meade Peak Phosphatic Shale, Phosphoria Formation, Wooley Valley, Idaho, USA. Chemical Geology. 269: 113-123.