CREWES and INOVA conducted a high-resolution broadband multi-component seismic surface and borehole test survey at the Priddis Geophysical Observatory in late October and early November of 2014. Two types of sources were used; 0.125 kg of dynamite at 5 m depth with source points every 6 m, and an INOVA UNIVIB using a linear 1.5-150 Hz sweep with two sweeps per vibe point.
Four source and receiver lines were laid out in a star pattern centred on Testhole 1, which is an instrumented borehole installed by CREWES in 2013. All four receiver lines had SM7 10Hz three-component geophones at a 3 m receiver spacing. In addition, one of the receiver lines also had twelve SM7 geophones in groundscrews as well as single-component SL11 accelerometers and SM24 10 Hz high-sensitivity geophones, all at a 6 m receiver spacing.
The forty-five three-component 28 Hz geophones permanently installed in Testhole 1 at a nominal 3 m spacing were also used for this survey. Prior to beginning the seismic survey, natural gamma-ray and full waveform sonic logs were acquired in Testhole 2, 50m away from Testhole 1, which was then instrumented with a USSI retrievable clamping three-component fibre-optic system with six nodes spaced 20 m apart.
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