Case studies of geophysical search methods relevant to the continuation phase of an on-Site inspection

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Part II of the Protocol of the Comprehensive Test Ban Treaty prescribes the use of geophysical methods such as active seismic surveys and electrical conductivity measurements to search for and locate underground anomalies, including cavities and rubble zones, during the continuation phase of an on-site inspection. In this paper the application of spontaneous potential, magnetotelluric, active seismic, and gas sampling studies at the US Nevada Test Site associated with underground nuclear explosions will be described and discussed in the context of on-site inspections. Spontaneous potential and E-field ratio telluric methods were found to be effective in some geologic settings but ... continued below

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238 Kilobytes

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Sweeney, J J April 20, 1999.

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Part II of the Protocol of the Comprehensive Test Ban Treaty prescribes the use of geophysical methods such as active seismic surveys and electrical conductivity measurements to search for and locate underground anomalies, including cavities and rubble zones, during the continuation phase of an on-site inspection. In this paper the application of spontaneous potential, magnetotelluric, active seismic, and gas sampling studies at the US Nevada Test Site associated with underground nuclear explosions will be described and discussed in the context of on-site inspections. Spontaneous potential and E-field ratio telluric methods were found to be effective in some geologic settings but not in others. An example of gas sampling is shown for which radiogenic gas was detected several years after detonation. The case study of the application of active seismic methods illustrates limitations imposed by the use of relatively simple systems in the field. Detection of a deeply-buried cavity or rubble zone will be difficult; results from the application of only a single method will likely be ambiguous. Best results will come from the synthesis of results from a number of widely-varying methods.

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238 Kilobytes

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  • On Site Inspection Workshop 4, Comprehensive Test Ban Treaty Preparatory Commission Working Group B, Vienna, Austria, May 25-31, 1999

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  • Other: DE00007724
  • Report No.: UCRL-JC-133961
  • Grant Number: W-7405-Eng-48
  • Office of Scientific & Technical Information Report Number: 7724
  • Archival Resource Key: ark:/67531/metadc720314

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  • April 20, 1999

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  • Sept. 29, 2015, 5:31 a.m.

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  • May 6, 2016, 9:37 p.m.

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Sweeney, J J. Case studies of geophysical search methods relevant to the continuation phase of an on-Site inspection, article, April 20, 1999; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc720314/: accessed August 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.