Results 251 to 260 of about 28,621 (307)

Waste Rock Biogeochemistry in a Permafrost Environment: Examination of a Cover Design for a Low-Sulfide, Granitic Waste Rock

Geomicrobiology Journal, 2017
ABSTRACTAt the Diavik Waste Rock Project's mine-research site, the microbial colonization and oxidation of waste rock sulfide minerals are attenuated by the extreme freeze-thaw cycle of a permafrost environment. The closure design for the waste rock stockpile consists of a low-sulfide waste rock and low-permeability till, covering a relatively higher ...
Jeff B. Langman, Harish Veeramani, David W. Blowes, Brenda Bailey, David Wilson, Leslie Smith, David C. Sego, Rich T. Amos, Steven P. Holland   +8 more
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Waste-rock hydrogeology and geochemistry

Applied Geochemistry, 2015
Abstract The oxidation of sulfide minerals in waste rock has the potential to generate low-quality drainage that can present a significant challenge to mine owners, regulators, and other stakeholders. Challenges involved in managing waste rock include the large volume of waste rock produced and the difficulty in predicting the quality and quantity of
Richard T. Amos, David W. Blowes, Brenda L. Bailey, David C. Sego, Leslie Smith, A. Ian M. Ritchie   +5 more
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The Diavik Waste Rock Project: Persistence of contaminants from blasting agents in waste rock effluent

Applied Geochemistry, 2013
Abstract During mining operations, explosives are used to fragment rock into workable size fractions. Mine-water chemistry can be affected by blasting agent residuals, including NH3, NO 2 - , NO 3 - , Cl−, and ClO 4 - .
Brenda L. Bailey, Lianna J.D. Smith, David W. Blowes, Carol J. Ptacek, Leslie Smith, David C. Sego   +5 more
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Waste Rock and Tailings Mixtures as a Possible Seal for Potentially Acid Forming Waste Rock

2003
Potentially acid forming (PAF) waste rock contained in dumps formed as a result of open cut mining of metalliferous orebodies are conventionally sealed or covered using a near-saturated, low permeability compacted clay layer, protected with a mulch layer and/or vegetated growth medium.
Williams, D.J., Wilson, G.W., Panidis, C.   +2 more
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Strategy for Radioactive Waste Disposal in Crystalline Rocks

Science, 1981
A strategy for waste disposal is proposed in which the repository would be situated in a crystalline rock mass beneath a blanket of sedimentary rocks whose ground-water flow characteristics are well understood. Such an approach exemplifies the concept of multiple barriers to the isolation of radioactive wastes from the biosphere.
J D, Bredehoeft, T, Maini
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The Diavik waste rock project: Water flow through mine waste rock in a permafrost terrain

Applied Geochemistry, 2013
Abstract A field experiment is being carried out at the Diavik diamond mine in northern Canada to investigate the influence of unsaturated flow behavior on the quality of drainage from mine waste rock piles in a region of continuous permafrost. This paper is part of a series describing processes affecting the weathering of waste rock and transport of
Matthew Neuner, Leslie Smith, David W. Blowes, David C. Sego, Lianna J.D. Smith, Nathan Fretz, Michael Gupton   +6 more
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Molybdenum and zinc stable isotope variation in mining waste rock drainage and waste rock at the Antamina mine, Peru

Science of The Total Environment, 2016
The stable isotope composition of molybdenum (Mo) and zinc (Zn) in mine wastes at the Antamina Copper-Zn-Mo mine, Peru, was characterized to investigate whether isotopic variation of these elements indicated metal attenuation processes in mine drainage. Waste rock and ore minerals were analyzed to identify the isotopic composition of Mo and Zn sources,
E K, Skierszkan, K U, Mayer, D, Weis, R D, Beckie   +3 more
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The Diavik Waste Rock Project: Design, construction, and instrumentation of field-scale experimental waste-rock piles

Applied Geochemistry, 2013
The physicochemical processes that affect acid mine drainage (AMD) in unsaturated waste rock piles and the capabilities of small-scale laboratory experiments to predict AMD from waste rock are not well understood. An integrated laboratory and field study to measure and compare low sulfide waste rock and drainage characteristics at various scales has ...
Lianna J.D. Smith, Michael C. Moncur, Matthew Neuner, Michael Gupton, David W. Blowes, Leslie Smith, David C. Sego   +6 more
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The Diavik Waste Rock Project: Measurement of the thermal regime of a waste-rock test pile in a permafrost environment

Applied Geochemistry, 2013
Abstract The interior thermal regime of a field-scale experimental waste rock pile in the Northwest Territories, Canada, was studied. Test pile construction was completed in the summer 2006, and temperature data was collected continuously since that time to February 2009. The temperature data indicates the test pile cooled over the study period, with
Nam H. Pham, David C. Sego, Lukas U. Arenson, David W. Blowes, Richard T. Amos, Leslie Smith   +5 more
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The Diavik waste rock project: Initial geochemical response from a low sulfide waste rock pile

Applied Geochemistry, 2013
Abstract Three large-scale experimental waste rock piles (test piles) were constructed and instrumented at the Diavik Diamond Mine in the Northwest Territories, Canada, as part of an integrated field and laboratory study to measure and compare physical and geochemical characteristics of experimental, low sulfide waste rock piles at various scales ...
Lianna J.D. Smith, Brenda L. Bailey, David W. Blowes, John L. Jambor, Leslie Smith, David C. Sego   +5 more
openaire   +1 more source