geophysical log News
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USGS Resources and Video on NMR Borehole Logging
The USGS has lots of very useful information on borehole logging technologies, methods and online resources. Below are two examples. NOTE: Although some of these resources show USGS staff using Vista Clara equipment, USGS does NOT endorse specific product solutions and none of these resources should be interpreted as an endorsement of Vista Clara solutions. This article provides an overview of ...
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Sensing Success
The Australian Deep Exploration Technologies Co-operative Research Centre has signed a commercialisation agreement with Boart Longyear for its downhole sensing tool The Deep Exploration Tech- nologies CRC (DET CRC) has been established to address the most significant chal- lenge to the future of the miner- als industry, i.e. the reduction in the mineral-resources inventory due to high production ...
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Watch NMR Webinar by Vista Clara’s Dave Walsh for South African Geophysical Association
On October 21, 2020, Vista Clara CEO, Dave Walsh presented an extensive webinar on “Magnetic Resonance for Groundwater Investigations” for the South African Geophysical Association (SAGA). The webinar abstract includes the following description: The NMR measurement technique has been adapted in several forms for geophysical applications, and in recent years has been used more widely ...
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ASTM D6429 - 99(2011)e1 standard guide for selecting surface geophysical methods
This guide applies to commonly used surface geophysical methods for those applications listed in Table 1. The rating system used in Table 1 is based upon the ability of each method to produce results under average field conditions when compared to other methods applied to the same application. An “A” rating implies a preferred method and a “B” rating implies an alternate ...
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ASTM D5777 - 00(2011)e1 standard guide for using the seismic refraction method for subsurface investigation
This guide summarizes the equipment, field procedures, and interpretation methods used for the determination of the depth, thickness and the seismic velocity of subsurface soil and rock or engineered materials, using the seismic refraction method. Measurement of subsurface conditions by the seismic refraction method requires a seismic energy source, trigger cable (or radio link), geophones, ...
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