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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 101 to 110 of 3758 (0.032 seconds)| 101 |
The interrelation between mine production and the amount of land required for mining purposesWilson, Grady Albert, 1934- January 1969 (has links)
No description available.
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| 102 |
Utilization of the fat-soluble vitamins A and D in the presence of mineral oilSpector, Harry, 1915-1959 January 1939 (has links)
No description available.
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Evaluating and controlling the risks associated with mining investmentRoss-Watt, Donald Allan James. January 1977 (has links)
No description available.
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GEOCHEMICAL INDICATORS OF BURIED SULPHIDE MINERALISATION UNDER SEDIMENTARY COVER NEAR TALBOT LAKE, MANITOBAvan Geffen, Pim Wilhelmus Gerardus 16 May 2011 (has links)
The Paleoproterozoic Talbot volcanogenic massive sulphide (VMS) Cu-Zn occurrence is
located near Talbot Lake, Manitoba, about 80 km south of Snow Lake. The mineralised system is
unconformably overlain by more than 100 m of Paleozoic dolomite sequences and Quaternary
glacial till. The clay fraction of the till contains pronounced anomalies of Zn, Cu, Ag, Pb, Au,
Mn, Hg, Cd, Co, Bi and Se, which is ascribed to the formation of clay-humic complexes that
have carbon-isotopic compositions of δ13C < -20‰. A VMS origin of the near-surface anomaly
is confirmed by distinctly low 206Pb/204Pb ratios, compared to a more radiogenic till signature.
The overall low 206Pb/204Pb ratios in the organic surface media black spruce bark, moss and
humus also indicate input from a magmatic sulphide source, but likely reflect windblown material
from the Flin Flon smelter stack at 160 km to the northwest. Black spruce tree rings that pre-date
industrial sources of atmospheric metal input are used to measure historical element distributions
because they record the local geochemistry at the time of heartwood growth and their root
systems tap into large volumes of soil. At the Talbot prospect, the presence of secondary Zn from
the till in black spruce tree cores is reflected in the Zn/Ca ratio, which eliminates the effect of
dolomite-derived Zn. The process of element migration from buried mineralisation to the surface
is complex and includes oxidation of sulphides, mobilisation and complexation of metal ions,
physical upward transport, and deposition of indicator elements near the surface in accessible
sampling media. To account for a significant influx of indicator elements into the relatively
recently deposited till blanket, post-glacial groundwater upwelling is proposed to act as a major
mechanism driving upward element migration. / Thesis (Ph.D, Geological Sciences & Geological Engineering) -- Queen's University, 2011-05-14 04:38:36.886
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Base metal exploration efficiency and effectiveness : Canada, 1951-1974Hawkins, T. E. Gregory. January 1979 (has links)
No description available.
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| 106 |
Chemical investigation and fluorescence imaging of uranium immobilisation in heterogenous bench-scale flow reactorsFraser, Rebecca January 2012 (has links)
No description available.
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| 107 |
Soil gas emanometry and hydrothermal mineralisation in southwest EnglandGregory, R. G. January 1987 (has links)
No description available.
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| 108 |
Mineral elements in diet, health and disease : analysis of cow's milk and human tissue samplesEmmett, Suzanne E. January 1989 (has links)
No description available.
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| 109 |
Plasma spectrochemical analysis of slurriesFoulkes, Michael Edward January 1989 (has links)
No description available.
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| 110 |
Imaging spectrometry for the mapping of surficial materialsMurphy, Richard J. January 1993 (has links)
No description available.
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