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• W2328652236 abstract "A high-resolution 3D seismic survey was undertaken to map shallow aquifers near Calgary, Alberta. The survey was 500m x 300m in area, with shot and receiver lines in an orthogonal geometry using 50m line separation. Shots and geophones were spaced at 10m intervals along source and receiver lines, respectively. The surface source used was an 18,000lb EnviroVibe sweeping over a 10Hz to 180Hz range. The survey yielded excellent reflections with a dominant frequency of 50Hz. One high-amplitude west-dipping reflection, occurring between depths of 250m and 450 m, was mapped over the survey area. The event is correlative to a Tertiary sandstone which may be a regional aquifer. Introduction A 3D surface seismic survey, a vertical seismic profile (VSP), and well logs were acquired at a site near Priddis, Alberta, about 30 km southwest of the city of Calgary. The purpose of the program was to map shallow stratigraphy and structure to depths of up to 500m, and to investigate shallow aquifers in the study area. 3D seismic surveys are used more typically to map deeper targets, but this program illustrates the efficacy of the technique for characterizing shallow targets. This paper will focus on the surface seismic program; the VSP surveys and well logs are described in another paper in this volume (Wong et al., 2008). The site of the survey is located at the eastern edge of the Rocky Mountain foothills in the triangle zone (Lawton et al., 1996), a structural feature where clastic sediments of dominantly Cretaceous age have been wedged into the foreland basin. Local topography of the area is controlled by sandstone ridges of the Cretaceous Belly River Formations, which trend in a northwesterly direction, along structural strike. Shales of the Upper Cretaceous Edmonton Formation form the bedrock in the intervening valleys. In the study area, Upper Cretaceous and Tertiary strata dip gently towards the southwest. An aerial photograph of the site is provided in Figure 1, covering a quarter-section of land owned by the University of Calgary and home to the Rothney Astrophysical Observatory (buildings shown near the right hand side of the" @default.
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• W2328652236 date "2008-01-01" @default.
• W2328652236 modified "2023-09-27" @default.
• W2328652236 title "A 3D Seismic Survey For Shallow Aquifer Mapping" @default.
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• W2328652236 doi "https://doi.org/10.3997/2214-4609-pdb.177.78" @default.
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