Nuclear Logging Methods

NEW DEVELOPMENTS IN NUCLEAR LOGGING METHODS WITH SPECIAL EMPHASIS ON INDUSTRIAL USES ARE SURVEYED. THE USE OF NATURAL GAMMA LOGS TO GIVE ROCK LITHOLOGY; GAMMA-RAY SCATTERING TO GIVE DENSITY INFORMATION AND TO LOCATE CONCENTRATIONS OF HEAVY ELEMENTS IN ROCKS; NEUTRON LOGS FOR POROSITY DETERMINATION AND OIL-SALTWATER DEFFERENTIATION; AND COMBINATIONS OF LOGS TO IDENTIFY LITHOLOGY AND DEPOSITS OF NONMETALLIC MINERALS ARE DISCUSSED. FUTURE NUCLEAR LOGGING TECHNIQUES FOR LUNAR AND PLANETARY SURFACE ANALYSIS, FOR OCEAN-BOTTOM SEDIMENT-DENSITY GAGING, AND FOR PHOTONUCLEAR ACTIVATION OF GEOLOGIC SAMPLES ARE SUGGESTED. COMPUTER METHODS FOR THE ANALYSIS OF COMPLEX GAMMA SPECTRUMS ARE ALSO DISCUSSED. /AUTHOR/