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Simultaneous Acquisition of Near Surface Geophysical Data
(1) Geomatrix Earth Science Ltd, Leighton Buzzard, United Kingdom.
This paper seeks to define the problems and solutions developed to enable the simultaneous deployment and use of multiple geophysics instrumentation from a common platform using the GEEP technology (Geophysical Exploration Equipment Platform) developed by Geomatrix Earth Science.
For the purposes of this paper the Geophysical boundary is set at the first 100M.
It may be argued that for basic Geophysical exploration tasks such as foundation studies that a single geophysical tool might suffice. However when addressing more challenging tasks such as Archaeological research, UXO detection, Karst location, waste location, mineral mapping etc it soon becomes clear that more than one geophysical tool is not only desirable but is essential to a valid survey outcome.
The difficulty that a field geophysicist faces however is that every additional tool that is used adds proportionately to the project cost, the temptation being to expend the minimum necessary to achieve a satisfactory report. This trade off between acquired data and report integrity cannot easily be reduced unless all the appropriate geophysical tools are used as part of a single pass survey. This is a challenge that is well understood by the geophysics community but is in reality little researched by any one company.
Geomatrix Earth Science has been involved in the GEEP research project that covers the past ten years, initially to enable the rapid location of Fluorite-barite mineralisation deposits and subsequently for the full spectrum of geophysical mapping tasks.
We seek here to define the technical problems and solutions developed to enable the simultaneous deployment and use of multiple geophysics instruments from a common platform using the GEEP technology.
The goal for this project was to develop technology and techniques that would allow the collection of data using multiple instruments in such a manner that no one instruments data was compromised by the effects of adjacent instruments and that the speed of data acquisition was enhanced such that the cost of the GEEP platform was offset by the time saved. It was also desirable that the motion and performance of the GEEP platform be monitored such that all the combined data might be amalgamated efficiently within the post processing process.
The development journey for this GEEP project has been much more complex than originally imagined with a deal of both practical and innovative solutions being applied.