Report discussing a geological study of the Chattanooga Shale of the Eastern Highland Rim area of Tennessee in 1947, 1948, and 1949 to determine its availability as a source of uranium.

The following report covers investigations on radioactivity in copper-bearing iron oxide mineralization fissures and fractures in narrow zones within Kobuk River Valley, Alaska.

From abstract: "A method is described whereby aluminum in phosphate rock is determined by the fluorescence of aluminum hydroxyquinolate in chloroform solution."

Abstract: Secondary minerals of the uranite group occur in dense quartz veins and in altered aplitic granite along and near the crest of the east-trending ridge about one mile west of Clancy, Montana. Brief examination suggests that the radioactive minerals are erratically distributed, but a more thorough study of the area will be made by the Geological Survey during the coming field season.

Abstract: Some modifications of current techniques for preparing nuclear plates for mineralogical studies are described. A method of mounting nuclear-track stripping film on thin sections is given. Illustrations are presented of the application of these techniques to the study of the radioactivity of powdered rocks, minerals, or thin sections.

Report discussing the study of radioactivity and mineralogy of 24 placer concentrate samples from the Fortymile district of east-central Alaska. Only two samples showed significant radioactivity due to uraniferous thorianite. Sections include geology, and radiometric and mineralogic studies.

Abstract: "As a result of inquiries by prospectors in 1948 concerning radioactive ores in the vicinity of Jakolof Bay on the Kenai Peninsula in southern Alaska, the Geological Survey conducted a brief investigation during 1949. No radioactive material was found. Possibly a chromite stockpile in this locality was mistaken for pitchblades."

Report discussing a study in which "the CO₂ combined as calcite in carbonate-bearing apatites has been distinguished from that combined as carbonate-apatite, or present in some form other than calcite, by use of X-ray powder patterns, differential thermal analyses, and differential solubility tests."

Report discussing the sources of about 1,400 samples of samples of mine, mill, and smelter products that were collected by the U.S. Geological Survey. In addition, the "kind of material sampled, i.e. ores, concentrates, middlings, tailings, flue dusts, and so forth, and the radioactivity of the samples are listed in the report."

Geologic maps and structure sections of the Johnson Creek Quadrangle in Caribou County, Idaho. This report concerns work done on behalf of the Division of Raw Materials of the U.S. Atomic Energy Commission.

Report discussing geophysical observations in parts of the Grants district of McKinley County, New Mexico. This study had the "dual objective of investigating the unusual occurrence of negative aeromagnetic anomalies in close association with airborne radioactivity anomalies, and of investigating other geophysical methods which might assist directly or indirectly in the search for uranium ores in the Grants district."

From Abstract: "This paper presents the methods of chemical analysis that were used to aid in mineralogic studies of Colorado Plateau carnotite for purposes of determining age of materials."

From abstract: During 1951 about 60 square miles of the Capitol Reef area, Wayne County, Utah, the northern end of the Waterpocket Fold, was mapped by plane-table methods on a scale of 1:62, 500. Formations, with an approximate aggregate thickness of 3, 200 feet, range from the Coconino sandstone of Permian age to the Navajo sandstone of Jurassic (?) age. About 35 linear miles of Shinarump conglomerate of Triassic age was examined in detail. Cliffs 900 to 1, 000 feet high form the west face of Capitol Reef, which is on the east and northeast flanks of a structural and topographic dome, The uranium deposits are in the basal part of the Shinarump conglomerate. Zippeite and metatorbernite are the uranium minerals found, and are associated with copper minerals, carbonaceous matter, clay beds, a thick bleached zone at the top of the Moenkopi formation, and channels or scours in the top of the Moenkopi. The highest radioactivity is in a clay bed at the base of the Shinarump conglomerate, and was detected at 7 localities between Grand Wash and Capitol Gorge, at the Birch Spring prospect in Moonie Draw, and at the Oyler mine in Grand Wash.

Report discussing a 1951 geological study of about 60 square miles of the Capitol Reef area of Wayne County, Utah. Specifically, the details of the first season's field work on the uranium deposits and on the sedimentary rocks of the area are presented.

Report discussing a study regarding the highly radioactive Tertiary porphyries, which were found in Colorado.

Report discussing a the presence of volcanic debris in sandstones containing uranium, and this volcanic debris' possible use in identifying uranium origins.

Introduction: Deposits of phosphate in Florida, located beyond the limits of known producing areas, have been reported by prospectors and mining companies. Much of the information has been based upon prospecting and exploration which was undertaken many years ago and as a result the published data relating to the occurrence of these deposits are fragmentary, and few details relating to specific locations and extent are available.

Report discussing airborne radioactivity surveys, aimed at finding uraniferous phosphate deposits, in ten areas of Florida. A subsequent ground investigation of two radioactivity anomalies out of eight was conducted. Information on radioactivity measurements for each area is given as well as conclusions.

Report discussing the geography and ores of the Spud patch area, which acted as a source of carnotite ore from deposits in a sandstone lens.

From abstract: The investigation in the Rock Corral area was undertaken to determine the relationship between 1) the anomalously high radioactivity recorded during an airborne survey and 2) the distribution and mineralogic mode of occurrence of radioactive material.

Report discussing the investigation of the Rock Corral area aimed at determining the connection between high radioactivity found during an airborne survey and the "distribution and mineralogic mode of occurrence" of this radioactivity.

Report discussing the investigation of the mineralogy and geochemistry of some subbituminous uraniferous coal from the Red Desert area of Sweetwater County, Wyoming. Data and discussion from the mineralogic and geochemical studies, Fischer retort assays of a coal sample, and summary and conclusions are included.

Report discussing a 1948 geological examination to find radioactive deposits in the Eagle-Nation area of east-central Alaska.

A report regarding a reconnaissance done in 1948 in order to find radioactive deposits in the Eagle-Nation Area in East-Central Alaska.