Preliminary observations on the geological environment of the Paleoproterozoic auriferous volcanogenic massive sulphide deposit at Lalor, Snow Lake, Manitoba
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By simulating atmospheric deposition experiment, this paper analyzed the relationship between the measured spectral reflectance and the concentrations of contaminants in the snow. It is found that the visible spectrum is sensitive to snow contaminants. From 350nm to 850nm, with the increase concentrations of contaminants in snow, snow reflectivity dramatically decreases. We get the conclusion that the most sensitive bands to snow contaminants are 384nm, 450nm and 1495nm.Using the non-linear regression method to analyze the relationship between spectral reflectance and the contaminants. The results showed the reflectivity of snow at visible bands logarithmically decreases with the snow contaminants increasing; the R 2 can reach 0.9.To the contrary, the spectral reflectance at nearinfrared increases with the snow contaminants increasing. Therefore, this method can be combined satellite image to forecast the contaminants in the snow at large-scale.
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Some examinations are made about errors of the water equivalent of snow measured with a snow-sampler. It is found that both the change of the sampling deficiency of a sampler related to the sorts of deposited snow and the irregular variation of the snow depth in an observation field might be the main factors that disturbed the uniformity of daily successive data. The former has not been yet sufficiently studied, but it is show that the latter could be modified to some extent by comparing it with a fixed snow-tsake in snow melting season.
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This Chapter is in Section 5: Measurements, edited by Thomas J. Lockhart This chapter contains sections titled: Introduction—Characteristics and Importance of Snow Measurements of Snow Properties of Snow That Make Basic Measurements Difficult Procedures for Measuring Snowfall, Snow Depth and Water Content Contribution of Technology to Snow Measurements Summary of Snow Data Continuity Sources of Specialized Snow Data
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