Three component DHEM surveying at Balcooma

Abstract

A comparative survey using multi-loop axial DHEM and three component DHEM was undertaken on the Balcooma deposit, North Queensland by Crone Geophysics & Exploration Ltd. in 1991. Unlike the axial data, results from the three component data are unambiguous as to the location and orientation of a previously undetected extension of a mineralised lens. The paper shows how cross-component data can be corrected for probe rotation down the hole using the primary field and suggests that vector presentation of results can aid interpretation.