Reconnaissance for radioactive deposits in the Nixon Fork mining district, Medfra Quadrangle, central Alaska, 1949
Max G. White, John M. Stevens
1953, Trace Elements Investigations 75
Reconnaissance for radioactive deposits in the Nixon Fork mining district, Medfra quadrangle, central Alaska, in 1949 disclosed the occurrence of allanite in sampled containing as much as 0.05 percent equivalent uranium from the dump of the Whalen mine; the presence of radioactive parisite (a rare-earth fluocarbonate) in a highly altered...
Monazite deposits of the southeastern Atlantic States
John Beaver Mertie
1953, Circular 237
Monazite, a phosphate of the rare earths, is the principal mineral from which the cerium earths and thorium are obtained. Fluviatile monazite placers were mined in the Piedmont province of North and South Carolina from 1887 to 1911, and again intermittently from 1915 to 1917; but the principal sources In...
Reconnaissance for radioactive materials in northeastern United States during 1952
Francis A. McKeown, Harry Klemic
1953, Trace Elements Investigations 317
Reconnaissance for radioactive materials was made in parts of Maine, New York, New Jersey, and Pennsylvania. The primary objective was to examine the iron ore deposits and associated rocks in the Adirondack Mountains of New York and the Highlands of New Jersey. In addition, several deposits known or reported to...
Radioactive source materials in Los Estados Unidos de Venezuela
Donald G. Wyant, William N. Sharp, Carlos Ponte Rodriguez
1953, Trace Elements Investigations 222
This report summarizes the data available on radioactive source materials in Los Estados Unidos de Venezuela accumulated by geologists of the Direccions Tecnica de Geolgia and antecedent agencies prior to June 1951, and the writers from June to November 1951. The investigation comprised preliminary study, field examination, office studies, and the...
Preliminary reconnaissance survey for thorium, uranium, and rare-earth oxides, Bear Lodge Mountains, Crook County, Wyoming
V.R. Wilmarth, Douglas H. Johnson
1953, Trace Elements Investigations 172
An area about 6 miles north of Sundance, in the Bear Lodge Mountains, in Crook County, Wyo., was examined during August 1950 for thorium, uranium, and rare-earth oxides and samples were collected. Uranium is known to occur in fluorite veins and iron-manganese veins and in the igneous rocks of Tertiary age...
Systematic variation of rare earths in monazite
K. J. Murata, H. J. Rose Jr., M. K. Carron
1953, Geochimica et Cosmochimica Acta (4) 292-300
Ten monazites from widely scattered localities have been analyzed for La, Ce, Pr, Nd, Sm, Gd, Y and Th by means of a combined chemical and emission spectrographic method. The analytical results, calculated to atomic percent of total rare earths (thorium excluded), show a considerable variation in the proportions of...
Method for determination of small amounts of rare earths and thorium in phosphate rocks
C. L. Waring, H. Mela Jr.
1953, Analytical Chemistry (25) 432-435
In laboratory investigations, interest developed in the possible rare-earth content of phosphate samples from Florida and the northwestern United States. Because of the difficulty of making chemical determinations of traces of individual rare earths, a combined chemical-spectrographic method was investigated. After removal of iron by the extraction of the chloride...
Geology of the Quartz Creek Pegmatite District, Gunnison County Colorado
Mortimer H. Staatz, A.F. Trites
1952, Trace Elements Investigations 138
The Quartz Creek pegmatite district includes an area about 29 square miles in the vicinity of Quartz Creek in Gunnison County,. Colo. This area contains 1,803 pegmatites that are intruded into pre-Cambrian rocks. The rocks exposed in the district range in age from pre-Cambrian to Recent. The oldest pre-Cambrian rocks are...
The determination of small amounts of rare earths in phosphate rocks
Claude L. Waring, Henry Mela Jr.
1952, Trace Elements Investigations 239
Geologic map of bastnaesite deposits, Birthday claims, San Bernardino County, California
W. N. Sharp, L.C. Pray
1952, Miscellaneous Field Studies Map 4
In April 1949 a deposit containing considerable quantities of the rare mineral bastnaesite - the fluorocarbonate of cerium, lanthanum, and other rare earths - was discovered near Mountain Pass, San Bernardino County, Calif. Small quantities of bastnaesite have been found in several places in the United States, but this area...
The Permian phosphorite deposits of western United States
V.E. McKelvey, Roger Warren Swanson, Richard Porter Sheldon
1952, Open-File Report 53-166
The Permian marine phosphorite deposits of the western United States were laid down in the Phosphoria formation and its partial stratigraphic equivalents over an area of about 135,000 square miles in Montana, Idaho, Wyoming, Utah, and Nevada. The deposits in the eastern part of the field lie on the western...
Geologic setting of the Mountain Pass rare earth deposits, San Bernardino County, California
Jerry Chipman Olson
1952, Open-File Report 52-110
The Mountain Pass district is in a block of pre-Cambrian metamorphic rocks bounded on the east and south by the alluvium of Ivanpah Valley. This block is separated from Paleozoic and Mesozoic sedimentary and volcanic rocks on the west by the Clark Mountain normal fault, and the northern boundary of...
Pegmatites of the Crystal Mountain district, Larimer County, Colorado
William R. Thurston
1952, Trace Elements Investigations 139
The Front Range of Colorado is composed chiefly of schists of the pre-Cambrian Idaho Springs formation which have been intruded by a variety of granitic batholiths. In the Crystal Mountain district the Mount Olympus granite, a satellite of the Longs Peak batholith, forms sills and essentially concordant multiple intrusions in...
Geologic map of the baritic carbonate body near Mountain Pass, San Bernardino County, California
William N. Sharp, Jerry Chipman Olson
1951, Open-File Report 51-38
A geologic map of an important deposit of rare earth metals studied recently by Geological Survey geologists near Mountain Pass, California has been completed Secretary of the Interior Oscar L. Chapman announced today. The discovery of this deposit was announced on January 16, and because of the great interest that...
Preliminary report on the stratigraphy and structure of the Shaviovik and upper Sagavanirktok Rivers area, Alaska
A. Samuel Keller, Robert L. Detterman
1951, Geological Investigations, Naval Petroleum Reserve No. 4, Alaska 36
During the 1951 field season, U. S. Geological Survey Navy Oil Unit party 1 conducted stratigraphic and structural studies of the rocks in the area between the westernmost fork of the Shaviovik River and the East Kuparuk River. This area is drained by the Sagavanirktok River and its major tributaries;...
A rare color phase of the song sparrow
E. Arnold, S.H. Low
1950, Atlantic Naturalist (6) 23
Uranium in pegmatites
Lincoln R. Page
1950, Economic Geology (45) 12-34
Uranium and rare-earth minerals are common accessory minerals in pegmatite deposits. No domestic pegmatites have been found that are rich enough to support an economic mining operation for uranium alone; however, small quantities of uranium minerals may be recovered as by-products of feldspar or mica mining. Madagascar is the only...
Summary of Kinoshita's kuroko deposits of Japan
John J. Collins
1950, Economic Geology (45) 363-376
Summarized translation of a report by Kameki Kinoshita, published in Japanese in 1943, on kuroko deposits (black ore deposits) of Japan. "Kuroko means two things. One is the common mixture of sphalerite, galena, and barite which is ordinarily black to grayish white, depending on the proportion of barite. The other...
Hawaiian petrographic province
G. A. Macdonald
1949, GSA Bulletin (60) 1541-1596
The lavas of the Hawaiian Islands range from mafic picrite-basalts and melilite-nepheline basalts to salic trachytes. Olivine basalt, by far the most abundant type, is regarded as representing the parent magma of the Hawaiian province. Closely associated with the olivine basalts are basalts, and picrite-basalts with many large phenocrysts of...
Submarine geology of Bikini atoll
K.O. Emery
1948, GSA Bulletin (59) 855-860
The program of investigations made in connection with the atomic bomb tests in the summer of 1946 at Bikini Atoll provided a rare opportunity for obtaining information on the physiography and sediments of atolls. The outer slopes around Bikini Atoll rise from a depth of...
Heavy metals in altered rock over blind ore bodies, East Tintic District, Utah
Thomas Seward Lovering, V.P. Sokoloff, Hal T. Morris
1948, Economic Geology (43) 384-399
Standard chemical tests and spectroscopic analyses of altered Tertiary lavas that occur above blind ore bodies in the East Tintic district, Utah, have failed to show any evidence of the mineralization in the underlying dolomites. A new technique involving dithizone was used in the field to test ammonium acetate extracts...
Geology and ground-water resources of the island of Niihau, Hawaii
Harold T. Stearns, Gordon A. Macdonald
1947, Bulletin 12
Niihau lies 171/2 miles southwest of Kauai. Its area is 72 square miles, and its highest point has an altitude of 1,281 feet. The population is about 180, chiefly Hawaiians. The annual rainfall at Kiekie, the ranch headquarters, generally ranges between 18 and 26 inches. The chief industries are the...
Quartz crystal in Brazil
W. D. Johnston Jr., R.D. Butler
1946, GSA Bulletin (57) 601-650
The peak production of Brazilian quartz crystal was reached in 1943 when 2411 metric tons were exported. Minas Gerais, Goiaz, and Bahia are the principal producing states. Minor quantities are obtained from Espirito Santo and Northeastern Brazil.Primary veins and pegmatites yield secondary deposits of eluvial, colluvial, and alluvial origin. The...
Activity of Parícutin volcano from April 12 to May 3, 1946
George C. Kennedy
1946, Eos, Transactions, American Geophysical Union (27) 410-411
The activity of Parícutin varied greatly during the period April 12 to May 3. The strong eruptive activity that began in mid‐March, marked on March 17 by the formation of a new boca with a short‐lived volcancito and by external changes in the form of the cone, continued until April...
Geology and ground-water resources of the island of Hawaii
Harold T. Stearns, Gordon A. Macdonald
1946, Bulletin 9
Hawaii, the largest island in the Hawaiian group, is 93 miles long, 76 miles wide, and covers 4,030 square miles. Mauna Loa Volcano is 13,680 feet high and Mauna Kea is 13,784 feet high. Plate 1 shows the geology, wells, springs, and water-development tunnels. Plate 2 is a map and...
