EVALUATION OF MONAZITE PLACER DEPOSITS
Technical Report
·
OSTI ID:4354843
New techaiques are described which are employed for evaluation of monazite deposits. The presence of other radioactive minerals hesides monazite, such as uranothorite, samarskite, euxenite, furgusonite, brannerite, xenotime, zircon and others, make a triple check--radiometric, chemical, and mineralogic--- analysis desirable. Information is given on the different methods used in field operations, in field laboratories and in the Mt. Weather Laboratory. Churn drilling and shafting with caissons have been used as sampling techniques. Substantial reserves of monazite which will insure the domestic production of the mineral have been found by the Bureau of Mines during the last 3 years, using these methods. (J.E.D.) In 1948, 7,662 miles of roadside rocks and soils in Vermont, New Hampshire, Connecticut, Rhode Island, and southeastern New York were traversed with a car-mounted Geiger-Mueller counter. The observod distribution of the abnormally rndioactive rocks and soils is limited to certain areas, called radioactive provinces,'' that are separated from each other by areas of essentially nonradio active rock. These provinces and their maximum percent of equivalent uranium are: The Hudson and Housatonic Highlands of southeastern New York and western Connecticut, 0.240 equivalent uranium; Central New England, 0.006 equivalent uranium; and the Milton area of northwestern Vermont, 0.029 equivalent uranium. The distribution, form, grade, and uranium-thorium ratio of the radioactive deposits differ in each of the three provinces. Most of the radioactivity outside of the Milton area is caused by thorium. (auth)
- Research Organization:
- Bureau of Mines
- NSA Number:
- NSA-12-007243
- OSTI ID:
- 4354843
- Report Number(s):
- RMO-908
- Country of Publication:
- United States
- Language:
- English
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