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A preliminary report on the rapid fluorimetric determination of uranium in low-grade ores
F. S. Grimaldi, Harry Levine
1950, Trace Elements Investigations 47
A simple and very rapid fluorimetric procedure is described for the determination of uranium in low-grade shale and phosphate ores. The best working range is from 0.001 to about 0.04 percent U. The procedure employs batch extraction of uranium nitrate by ethyl acetate, using aluminum nitrate as the salting agent,...
Stratigraphy and structure of the area of the upper Meade River, Alaska
Charles L. Whittington, Samuel A. Keller
1950, Geological Investigations, Naval Petroleum Reserve No. 4, Alaska 36
The stratigraphic evidence in the upper Meade River area includes zones B to D of the Nanushuk group (Cretaceous). Zones B and C are not differentiated in mapping and description. South of the Meade River 2,100 feet of zones B-C and 1,500 feet of zone D are exposed. North of...
Stratigraphy and structure of the Okpikruak and Kiruktagiak Rivers area, Alaska
William W. Patton Jr., Irvin L. Tailleur
1950, Geological Investigations, Naval Petroleum Reserve No. 4, Alaska 34
Navy Oil Unit Party 4, during the summer field season of 1949, examined the surface geology of the area of the Okpikruak and Kiruktagiak Rivers. The party consisted of six men: two geologists, two field assistants, a weasel mechanic, and a cook. Three weasels were used for transportation in the...
An improved fluorimeter for the determination of uranium in fluoride melts
Mary H. Fletcher, Irving May
1950, Trace Elements Investigations 120
The Model R fluorimeter has been modified to increase its stability and sensitivity. The new instrument* is about ten times as sensitive as the original fluorimeter, but it can also be employed conveniently at a sensitivity level comparable to or less than that of the Model R fluorimeter. *The modified fluorimeter...
Carnotite resources in the Charles T. area and vicinity, San Miguel County, Colorado
Alfred Lerner Bush
1950, Trace Elements Investigations 112
Between November 1947 and September 1949, the United States Geological Survey, at the request of the Atomic Energy Commission, conducted an exploratory drilling program in the Charles T. area and vicinity. The purpose of the exploration was to discover new carnotite deposits to support milling operations on the Colorado Plateau,...
A preliminary report on methods of determining the age of Colorado plateau carnotite
Lorin Rollins Stieff, M.N. Girhard, T. W. Stern
1950, Trace Elements Investigations 108
Four methods of dating Colorado Plateau carnotite have been examined and evaluated: mineralogic methods, radioactive-equilibrium methods, lead-uranium-ratio methods, and lead-isotope methods. The data on 12 high-grade samples, from a suite of 50 representative carnotite ores, are presented....
Canada geese of the Mississippi flyway with special reference to an Illinois flock
Harold C. Hanson, Robert H. Smith
1950, Bulletin of the Illinois Natural History Survey (25) 67-210
This Canada goose study is based on data from three primary sources : data collected at Horseshoe Lake, Alexander County, Illinois ; surveys by the authors on the distribution, habitat, and behavior of the population elsewhere in the Mississippi flyway ; and banding records of the Jack Miner Bird Sanctuary,...
Geologic interpretation of seismic data relocation Route 1, cut, Stations 34-52, Copper Mine Road area and northern portion of Ballard Estate in Topsfield, Mass.
James E. May, Daniel Linehan
1950, Open-File Report 50-46-B
Relocation of the Newburyport Turnpike, Route 1, in Topsfield, Mass., will require a long relatively deep cut between stations 34 and 52. In order to obtain preliminary information on the depths to bedrock and on the nature of the subsurface materials at this site, reconnaissance seismic work was performed in...
Geologic interpretation of seismic data relocation Route 2, Littleton Road grade separation stations 243-252 in Harvard, Mass.
James E. May, Daniel Linehan
1950, Open-File Report 50-46-A
During parts of June and July 1949 nine seismic traverses were made at this site. Upon preliminary office development, the velocity data for some of these traverses were though to be inadequate and it was recommended that these lines be re-surveyed. Later surveys (March 1950), however, of nearby sites indicated...
The Leyden uranium prospect, Jefferson County, Colorado
Garland B. Gott
1950, Trace Elements Memorandum 132
The Leyden uranium prospect is in sec. 28, T, 2 S., R. 70 W, Jefferson County, Cplo, Examination of the property was made in February 1950. Uranium was first reported in this locality in 1875 by Captain E. L. Berthoud, who noted uranium minerals associated with the main coal bed....