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Humidity Cell Investigation of Particle Size Effects on Weather Rates of Mine Waste Rock from the Antamina Mine, Peru. Yu, Emily
Abstract
A laboratory humidity cell experiment was performed on marble diopside waste rock from the Antamina Mine of Peru, one of the world’s largest operating copper-zinc mines, in order to study the effects of particle size on weathering rates. There is currently little understanding of the geochemical characteristics of neutral drainage systems, and further knowledge is necessary to improve waste rock management techniques at mines hosted in rock with high neutralization capacity. Grain sizes less than 0.053 to 9.50 mm were separated into individual cells and seven weeks of leachate were collected then analyzed by ICP-OES for elements of concern. Results suggest that the finer the particle size, the higher the alkalinity and release rates of calcium, sulphur, molybdenum, magnesium, and manganese. This trend was especially apparent in the results of magnesium and manganese, where, unlike all other samples, the release rates in the finest grained sample increased over time. Concentrations of copper, chromium, nickel, and iron were determined to be below the detection limit of this analysis. The saturation indices of calcite were found to be above the saturation level in two samples. The continuation of this experiment will further characterize trends in particle size versus weathering rates. Additional parameters should be analyzed in the leachate to increase understanding of neutral drainage.
Item Metadata
Title |
Humidity Cell Investigation of Particle Size Effects on Weather Rates of Mine Waste Rock from the Antamina Mine, Peru.
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Creator | |
Date Issued |
2009-04-08
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Description |
A laboratory humidity cell experiment was performed on marble diopside
waste rock from the Antamina Mine of Peru, one of the world’s largest operating
copper-zinc mines, in order to study the effects of particle size on weathering
rates. There is currently little understanding of the geochemical characteristics of
neutral drainage systems, and further knowledge is necessary to improve waste
rock management techniques at mines hosted in rock with high neutralization
capacity.
Grain sizes less than 0.053 to 9.50 mm were separated into individual cells
and seven weeks of leachate were collected then analyzed by ICP-OES for
elements of concern. Results suggest that the finer the particle size, the higher the
alkalinity and release rates of calcium, sulphur, molybdenum, magnesium, and
manganese. This trend was especially apparent in the results of magnesium and
manganese, where, unlike all other samples, the release rates in the finest grained
sample increased over time. Concentrations of copper, chromium, nickel, and
iron were determined to be below the detection limit of this analysis. The
saturation indices of calcite were found to be above the saturation level in two
samples.
The continuation of this experiment will further characterize trends in
particle size versus weathering rates. Additional parameters should be analyzed
in the leachate to increase understanding of neutral drainage.
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Extent |
3531959 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Series | |
Date Available |
2009-04-09
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Provider |
Vancouver : University of British Columbia Library
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Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
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DOI |
10.14288/1.0053578
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URI | |
Affiliation | |
Campus | |
Citation |
Yu, Emily. 2009.Humidity Cell Investigation of Particle Size Effects on Weather Rates of Mine Waste Rock from the Antamina Mine, Peru. Undergraduate Honours Thesis. Department of Earth and Ocean Sciences. University of British Columbia.
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Peer Review Status |
Unreviewed
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Scholarly Level |
Undergraduate
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Copyright Holder |
Yu, Emily
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Rights URI | |
Aggregated Source Repository |
DSpace
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Item Citations and Data
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International