NIOSHTIC-2 Publications Search
Evaluation of a radioisotopic x-ray drill hole probe: delineation of lead ores.
Marr HE III
NTIS: PB 209 009 :1-28
The Bureau of Mines evaluated two drillhole probes for the delineation of Missouri lead ores. The battery-powered, portable instruments, weighing less than 30 pounds, were designed for logging holes of 1.8 Inches in diameter or larger. These probes have dual scintillation detectors, balanced filters with a pass band for lead ka radiation, and a cobalt-57 source of radiation. The results of field tests in Missouri confirm laboratory tests indicating that probe response can be correlated to lead ore grade using counting times of 10 seconds or less at any selected depth in the hole.
IH; Report of Investigation;
NTIS Accession No.
NTIS: PB 209 009
Page last reviewed: December 10, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division