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S-WAVE REFRACTION SURVEY OF AGGREGATE CO

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Product Details

Product Number
205709
Series
SIR-2005-5012
Scale
NO SCALE
Alternate ID
SIR2005-5012
ISBN
9791411306621
Authors
WILLIAMS JACKIE M
Version Date
01/01/2005
Regions
CO
Countries
USA
Media
Electronic (Physical)
Format
CD-ROM

Additional Details

Description
An S-wave refraction survey was conducted in the Yampa River valley near Steamboat Springs, Colo., to determine how well this method could map alluvium, a major source of construction aggregate. At the field site, about 1 m of soil overlaid 8 m of alluvium that, in turn, overlaid sedimentary bedrock. The traveltimes of the direct and refracted S-waves were used to construct velocity cross sections whose various regions were directly related to the soil, alluvium, and bedrock. The cross sections were constrained to match geologic logs that were developed from drill-hole data. This constraint minimized the ambiguity in estimates of the thickness and the velocity of the alluvium, an ambiguity that is inherent to the S-wave refraction method. In the cross sections, the estimated S-wave velocity of the alluvium changed in the horizontal direction, and these changes were attributed to changes in composition of the alluvium. The estimated S-wave velocity of the alluvium was practically constant in the vertical direction, indicating that the fine layering observed in the geologic logs could not be detected. The S-wave refraction survey, in conjunction with independent information such as geologic logs, was found to be suitable for mapping the thickness of the alluvium.
Survey Date
2005
Print Date
2005
Pieces
1
Languages
English
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