Abstract
A seismic reflection survey was carried out in Bishop Wood, Yorkshire to determine the subsurface structure and the depth to the prospective gypsum and coal measures. Four 24-channel Geodes were used with a PEG40 accelerated weight drop and 10 Hz geophones at 3 m intervals to shot a 1099 m spread. The final depth processed section shows some reflectors which are clearly visible and is geologically consistent with borehole information in the area. A strong reflector was found at 25 to 50 m depth, multiple reflections were seen between 70 and 150 m and a strong reflector was seen at 200 to 250 m on the processed seismic section. These were tentatively interpreted as the top of Bunter sandstone, multiple gypsum horizons and the top of coal measures respectively, these observations agreed with the borehole information obtained in the area. A southwards dipping fault was inferred in the section at approximately 600 m along the line, though this may be an artefact due to acquisition and or processing of the data. Key words: Reflection, gypsum, coal, geophones, borehole and bishop wood.
Highlights
Reflection seismology is the most widely used geophysical techniques and has been since the 1930’s (Gadallah and Fisher, 1999)
Part of the spectacular success of the method lies in the fact that the raw data are processed to produce seismic section which is an image of the subsurface structure, this image is fundamentally different from a depth section, only by understanding how the reflection method is used and seismic sections are created the geologist makes informed interpretation (Yilmaz, 2001)
The reflection survey at the Bishop Wood was carried out with the aim to assess the depth to the economic targets of coal and gypsum layers and to investigate the structure of the
Summary
Processing and interpretation of 2d land seismic reflection survey over bishop wood Yorkshire, England. J. A seismic reflection survey was carried out in Bishop Wood, Yorkshire to determine the subsurface structure and the depth to the prospective gypsum and coal measures. A strong reflector was found at 25 to 50 m depth, multiple reflections were seen between 70 and 150 m and a strong reflector was seen at 200 to 250 m on the processed seismic section. These were tentatively interpreted as the top of Bunter sandstone, multiple gypsum horizons and the top of coal measures respectively, these observations agreed with the borehole information obtained in the area.
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