Mapping luminescence of uranium-bearing sandstones using an imaging Fraunhofer line discriminator

Measurements with a Fraunhofer Line Discriminator (FLD) imaging system over uranium-bearing sandstones in the Galisteo Formation, Sandia Mountains, New Mexico, show that luminescence of these sandstones is detectable and in general agreement with their distribution as mapped on the ground. The FLD imaging system coupled with a color television monitor and recorder, provides an inexpensive and reasonably accurate method of mapping the extent of luminescent materials, without the need of sophisticated aircraft image-motion compensation.