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Borehole Logging with Neutron Activation; a Laboratory Assessment.

PB273454

Publication Date	1977
Personal Author	Jensen, C. M.; Overmyer, R. F.; Rogers, V. C.; Sandquist, G. M.
Page Count	43
Abstract	A laboratory assessment of prompt and delayed neutron activation analysis with 252Cf and 14MeV neutron sources, for use as an in-situ method of determining low-level copper concentration has been performed. A simulated borehole using porphyry ore was constructed and varying copper concentrations were simulated using copper rods. Prompt neutron activation analysis experiments were consistant with earlier work and do not appear to be feasible for copper concentration of 1.5% or less. Delayed neutron activation analysis experiments indicate that copper ore concentrations of less than 0.1% are detectable using either the 511-KeV gamma-ray of copper-64 or the 1039-KeV gamma-ray of copper-66, with high resolution detectors such as Ge(Li) or intrinsic germanium.
Keywords	Copper ores Assaying Geochemical prospecting Neutron activation analysis Borehole logging Porphyry Californium isotopes Copper isotopes Chemical analysis Instrumentation Gamma rays Californium 252 Copper 64 Copper 66
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 99A - Analytical Chemistry
Corporate Authors	Ford, Bacon and Davis Utah, Inc., Salt Lake City.; BUREAU OF Mines, Washington, D.C.; Kennecott Exploration, Inc., Salt Lake City, Utah.
Supplemental Notes	Prepared in cooperation with Kennecott Exploration, Inc., Salt Lake City, Utah.
Document Type	Technical Report
Title Note	Final rept.
NTIS Issue Number	197802
Contract Number	H0262057

Borehole Logging with Neutron Activation; a Laboratory Assessment.

Borehole Logging with Neutron Activation; a Laboratory Assessment.
PB273454

Publication Date	1977
Personal Author	Jensen, C. M.; Overmyer, R. F.; Rogers, V. C.; Sandquist, G. M.
Page Count	43
Abstract	A laboratory assessment of prompt and delayed neutron activation analysis with 252Cf and 14MeV neutron sources, for use as an in-situ method of determining low-level copper concentration has been performed. A simulated borehole using porphyry ore was constructed and varying copper concentrations were simulated using copper rods. Prompt neutron activation analysis experiments were consistant with earlier work and do not appear to be feasible for copper concentration of 1.5% or less. Delayed neutron activation analysis experiments indicate that copper ore concentrations of less than 0.1% are detectable using either the 511-KeV gamma-ray of copper-64 or the 1039-KeV gamma-ray of copper-66, with high resolution detectors such as Ge(Li) or intrinsic germanium.
Keywords	Copper ores Assaying Geochemical prospecting Neutron activation analysis Borehole logging Porphyry Californium isotopes Copper isotopes Chemical analysis Instrumentation Gamma rays Californium 252 Copper 64 Copper 66
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 99A - Analytical Chemistry
Corporate Authors	Ford, Bacon and Davis Utah, Inc., Salt Lake City.; BUREAU OF Mines, Washington, D.C.; Kennecott Exploration, Inc., Salt Lake City, Utah.
Supplemental Notes	Prepared in cooperation with Kennecott Exploration, Inc., Salt Lake City, Utah.
Document Type	Technical Report
Title Note	Final rept.
NTIS Issue Number	197802
Contract Number	H0262057