E-PHASE SYSTEM FOR DETECTING BURIED GRANULAR DEPOSITS

In 1968, the Saskatchewan Department of Highways and Transportation began an investigation of airborne geophysical survey methods for mapping buried deposits. Single-frequency E-Phase airborne resistivity surveys were carried out in 1970 and 1971, and multifrequency survey programs began in 1973. The E-phase airborne resistivity system uses radio wave transmissions to provide the primary field, and it measures the apparent resistivity of the ground at 3 frequencies simultaneously. The measurement of apparent resistivity at 3 frequencies provides information about the subsurface to 3 depths. The correlation between earht materials and resistivities may vary from area to area, but definite limits of resistivity can be assigned for broad ranges of soil classification. The E-Phase survey in the Wadena area of Sakatchewan, where intertill gravel deposits were suspected to exist, resulted in 27 anomalies worthy of follow-up. Fifteen of these were followed up on, and all but 1 contained granular material under till cover. The preliminary ground follow-up results for 1 of the anomalies indicate a minimum of 1 million Mg of gravel that is covered and undelain by till. The test trails and routine surveying to date have shown that the E-Phase system can be used successfully for locating superficial and intertill granular deposits and that the system as it now exists represents a major advance in soil- exploration methods.

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 1-10
  • Monograph Title: Innovations in subsurface exploration of soils
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00141417
  • Record Type: Publication
  • ISBN: 0309024951
  • Report/Paper Numbers: Conf Paper
  • Files: TRIS, TRB
  • Created Date: Nov 3 1976 12:00AM