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Tungsten Deposits of the Nightingale District, Pershing County, Nevada

Description: Abstract: The tungsten deposits of the Nightingale district are just within the western border of Pershing County, Nev., and in the Nightingale or Truckee Range, which lies east of Winnemucca Lake. The Tertiary volcanic rocks of the district rest unconformably upon intrusive granodiorite and steeply dipping metamorphosed limestones and slates of unknown age. The tungsten deposits are of the contact-metamorphic type: The ore consists of scheelite bearing tactite, a dark silicate rock that was formed by metamorphism of limestone at the granodiorite contact. Scheelite (calcium tungstate) is the only valuable mineral. The gangue minerals are epidote, quartz, pyroxene, garnet, calcite, tremolite, molybdenite, pyrite, pyrrhotite, chalcopyrite, arsenopyrite, apatite, and sphene. The bodies of tactite are generally tabular, and they extend downward steeply, because both the limestones and the granodiorite contact dip vertically or nearly so. The largest tactite body of the district is at the Nightingale mine; it attains a maximum thickness of 60 feet and is nearly a thousand feet long, but only for part of its length is it thick enough and rich enough to be potentially minable. That it continues downward below the mine workings, which extend to a depth of 128 feet, is shown by nine drill holes put down by the Bureau of Mines, United States Department of the Interior, in 1940, all of which encountered tactite at depths of, 260 to 350 feet. The mine has produced about 12,000 tons of ore, and its ore bodies contain the principal reserve of the district. In 1938 the reserves of the entire district were estimated to be about 50,000 tons of ore averaging between 0.25 and 0.50 percent of W03. Later diamond drilling by the Bureau of Mines indicated that the principal tactite body continues to at least twice the depth hitherto explored by the mine workings.
Date: 1942
Creator: Smith, Ward C. & Guild, Philip White
Partner: UNT Libraries Government Documents Department

Topaz Deposits Near the Brewer Mine, Chesterfield County, South Carolina

Description: From introduction: Lode and placer deposits of massive topaz rock were discovered near the old Brewer gold mine in northwestern Chesterfield County, S. C., in 1935. Preliminary tests have shown that this rock can be used in the manufacture of refractory ware and as a source of mullite, thus augmenting supplies of kyanite that have been coming from India.
Date: 1942
Creator: Fries, Carl, Jr.
Partner: UNT Libraries Government Documents Department

Tungsten Deposits in the Sierra Nevada Near Bishop, California: A Preliminary Report

Description: From abstract: Scheelite ore bodies occur at widely separated localities in the Sierra Nevada near Bishop, Calif. The scheelite is found in altered sedimentary rocks at or near the contact between granitic rocks and limestones that are partly changed to silicate rocks composed largely of garnet. Mineralization was closely connected with the intrusion of the granite, the latest of the varied intrusives that make up the rocks of the Sierra Nevada.
Date: 1941
Creator: Lemmon, Dwight M.
Partner: UNT Libraries Government Documents Department

Quicksilver deposits in the Steens and Pueblo mountains, southern Oregon

Description: From Scope of Report: "During the summer of 1940, 34 days were spent in a preliminary study of the quicksilver deposits in the Steens and Pueblo Mountains. Nearly all of the quicksilver prospects were examined and mapped, and the general geology of the east flank of the mountains from north of Andrews to Denio was reconnoitered."
Date: unknown
Creator: Ross, Clyde P.
Partner: UNT Libraries Government Documents Department

Manganese Deposits of Cedar Creek Valley, Frederick and Shenandoah Counties, Virginia

Description: From abstract: The Cedar Creek manganese mining district is in the southwestern part of Frederick County and the northwestern part of Shenandoah County, Virginia. The manganese ore consists chiefly of the oxides pyrolusite and psilomelane, and forms replacement pockets and fracture fillings in the Oriskany sandstone and in residual sandy clay and chert derived from the New Scotland limestone. Both these formations are of Devonian age, and both form low ridges. The minable bodies have been deposited by ground water in the zone of weathering, and most of them lie above present ground-water level. The manganese-bearing formations, together with the older and younger formations exposed in Cedar Creek Valley, have been compressed into numerous folds, and at the southwestern end of the district one of these folds passes into a normal fault with a displacement of 1,000 feet or more.
Date: 1942
Creator: Monroe, Watson Hiner
Partner: UNT Libraries Government Documents Department

Chromite and quicksilver deposits of the Del Puerto area, Stanislaus County, California

Description: From Introduction: "The present report is based on 10 weeks of field work from mid-November 1940 until late January 1941, and 4 days in May 1941. An area of 5 1/2 square miles in and about Del Puerto Canyon was mapped on a scale of 600 feet to 1 inch, and two small areas in the vicinity of the Adobe Canyon and Black Bart chromite mines were mapped on a scale of 200 feet to 1 inch."
Date: 1942
Creator: Hawkes, H. E., Jr.; Wells, Francis G. & Wheeler, D. P., Jr.
Partner: UNT Libraries Government Documents Department

Nickel Deposits of Bohemia Basin and Vicinity, Yakobi Island, Alaska

Description: From Introduction: "According to present knowledge, the deposits center principally, in three areas: Bonemia Basin on Yakobi Island, Mirror Harbor on Chicagof Island, and Snipe Bay on Baranof Island. This report deals only with the deposits of the most northerly area, in and near Bohemia Basin."
Date: 1942
Creator: Reed, John C. & Dorr, John Van N., Jr.
Partner: UNT Libraries Government Documents Department

Nickel deposit near Riddle, Douglas County, Oregon

Description: From Introduction: "The Riddle nickel deposit is on Nickel Mountain, also called Piney Mountain, about 5 miles northwest of Riddle, Douglas Country, Oreg. (fig. 20). The deposit is an unevenly distributed surficial blanket, containing the nickel silicate garnierite, which rests upon peridotitic rocks on the western, southern, and southeastern slopes of the mountain above an elevation of 2,000 feet. It is on the Southern Pacific Railroad, and it is about 230 miles by highway south of Portland. A poorly conditioned dirt road about 5 miles long connects the town with the nickel deposit."
Date: 1942
Creator: Pecora, William T. & Hobbs, S. Warren
Partner: UNT Libraries Government Documents Department

Subsurface Geology and Oil and Gas Resources of Osage County, Oklahoma: Part 4. Townships 24 and 25 North Ranges 10 and 11 East

Description: From foreword: This report on the subsurface geology of Osage County, Okla., describes the structural features, the character of the oil- and gas-producing beds, and the localities where additional oil and gas may be found. It embodies a part of the results of a subsurface geologic investigation of the Osage Indian Reservation, which coincides in area with Osage County.
Date: 1941
Creator: Kennedy, L. E.; McClure, J. D.; Jenkins, H. D. & Bass, N. Wood
Partner: UNT Libraries Government Documents Department

Nickel-gold deposit near Mount Vernon, Skagit County, Washington

Description: From Introduction: "The Mount Vernon nickel-gold deposit is 4 1/2 miles southeast of the city of Mount Vernon, Skagit County, Wash. The writers believe that the nickel was originally present in the serpentinized peridotite and that it was dissolved and redistributed by ascending hydrothermal gold-bearing solutions while the serpentine was being altered into the silica-carbonate rock."
Date: 1941
Creator: Hobbs, S. W. & Pecora, W. T.
Partner: UNT Libraries Government Documents Department

Chromite deposits of Kenai Peninsula, Alaska

Description: This report describes field work and research done in two areas of ultramafic rocks containing chromite deposits are known at the south end of Kenai Peninsula, Alaska. The Red Mountain is the other area covered in this report.
Date: 1942
Creator: Guild, Philip White
Partner: UNT Libraries Government Documents Department

Muscovite in the Spruce Pine District, North Carolina

Description: From Abstract: "This report describes the occurrence of the mica and its physical properties among which is an unusually wide range of colors. A table is presented showing the results of power-factor measurements made by the National Bureau of Standards on 196 samples of sheet mica from 109 mica mines and 15 feldspar mines.It is concluded that more systematic planning of mica mining, for the district as a whole. would result in an average yearly production of at least 90,000 pounds of relatively clear sheet and possibly much more."
Date: 1942
Creator: Kesler, Thomas L. (Thomas Lingle), 1908-1997 & Olson, J. C. (Jerry Chipman), 1917-2013
Partner: UNT Libraries Government Documents Department

The Oil Fields of Allen County Kentucky, with Notes on the Oil Geology of Adjoining Counties

Description: From introduction: The purpose of the field work was to investigate the geology of the county, particularly the structure or lay of the oil-bearing strata and the results of drilling to date. Structural conditions in the producing fields were determined by running level lines to the wells and correlating the data recorded in the well logs generously furnished by the operators.
Date: 1919
Creator: Shaw, Eugene W. & Mather, Kirtley F.
Partner: UNT Libraries Government Documents Department

Subsurface Geology and Oil and Gas Resources of Osage County, Oklahoma: Part 1. Townships 22 and 23 North Ranges 10 and 11 East

Description: This report is part of a series describing the structural features, the character of the oil- and gas-producing beds, and the localities where additional oil and gas may be found in parts of Osage County, Oklahoma. This part discusses the geology and resources in the southeastern part of the county.
Date: 1938
Creator: Bass, N. Wood; Kennedy, L. E.; Dillard, W. R.; Leatherock, Otto & Hengst, J. H.
Partner: UNT Libraries Government Documents Department

Subsurface Geology and Oil and Gas Resources of Osage County, Oklahoma: Part 2. Townships 22 and 23 North Ranges 8 and 9 East

Description: This report is part of a series describing the structural features, the character of the oil- and gas-producing beds, and the localities where additional oil and gas may be found in parts of Osage County, Oklahoma. This part discusses the geology and resources in the southeastern part of the county, around Hominy, Oklahoma.
Date: 1939
Creator: Kirk, Charles Townsend; Jenkins, H. D.; Leatherock, Otto; Dillard, W. R.; Kennedy, L. E. & Bass, N. Wood
Partner: UNT Libraries Government Documents Department

Tungsten Resources of the Blue Wing District, Lemhi County Idaho

Description: From abstract: The Blue Wing district, Lemhi County, Idaho, is not only the principal tungsten mining district in the State but it has recently become one of the leading producers of tungsten in the United States. So far only one mine in the district is productive, but other prospects are being actively developed.
Date: 1941
Creator: Callaghan, Eugene & Lemmon, Dwight M.
Partner: UNT Libraries Government Documents Department

The Wild Horse Quicksilver District Lander County, Nevada

Description: Abstract: The presence of cinnabar in the Wild Horse district, in western Lander County, Nev., has been known since about 1916, but little ore was produced until 1940. In that year and early in 1941, deposits discovered in 1939 were mined to apparent exhaustion by the Wild Horse Quicksilver Mining Co., which had produced 827 flasks at the end of April 1941. The district is underlain by moderately deformed sandstone, shale, and limestone of Lower and Middle Triassic age, locally covered by remnants of a mantle of Tertiary fanglomerate, tuff, and lava. The Triassic rocks are partly silicified, and cinnabar has been found in and near silicified rock, particularly the silicified limestone at the base of -the Middle Triassic. The ore bodies so far discovered were individually small and ill-defined, and had an average tenor of less than 0.5 percent of quicksilver. Other similar ore bodies are to be expected at moderate depths, but the cost of exploration for them may, perhaps, prove excessive.
Date: 1942
Creator: Dane, Carle H. & Ross, Clyde P.
Partner: UNT Libraries Government Documents Department

Tin Deposit at Majuba Hill Pershing County, Nevada

Description: Abstract: The tin and copper deposits at Majuba Hill, Pershing County, Nevada are in a partly brecciated plug of Tertiary rhyolite porphyry, which is altered nearly everywhere to quartz and sericite and in some places is intensely tourmalinized. The tin mineral, cassiterite, appears to be associated with the alteration, for the single concentration of it was formed by replacement of altered breccia. Brecciated and altered rock is, however, only a general guide to potentially tin-bearing ground, and not a specific guide to ore shoots, for most of such rock appears to contain only small amounts of cassiterite, widely and unevenly distributed. The known deposit, which is exposed only underground, is at most 20 by 20 by 10 feet in size, and may contain about 12,000 pounds of metallic tin. The deposit is cut off by a normal fault, which apparently is of small displacement, and the footwall segment has not been found. The copper deposit is in the same normal fault, about 300 feet south of the earlier-formed tin deposit. From it about 4,000 tons of 12 percent copper ore was mined in 1915-18, but none has been mined since and no copper ore is now in sight.
Date: 1942
Creator: Smith, Ward C. & Gianella, V. P.
Partner: UNT Libraries Government Documents Department

Mineral Industry of Alaska in 1938

Description: From introduction: The presentation of a yearly record of the Alaska mineral industry is a continuing service that has been rendered by the Geological Survey from almost the earliest years of extensive mining in Alaska, and the present report, for 1938, is the thirty-fifth of this series. 2 Such a record, especially when supplemented by the statistics for the preceding years, not only affords an authoritative summary of current 'and past conditions but also indicates trends that are of significance in suggesting the lines along which future developments of the industry are likely to proceed. These reports therefore serve miners, prospectors, and businessmen concerned with Alaska affairs as useful historical records, statements of contemporary conditions, and starting points on which some conjectures concerning future operations may be predicated.
Date: 1939
Creator: Smith, Philip Sidney
Partner: UNT Libraries Government Documents Department

Mineral industry of Alaska in 1939

Description: From Introduction: "The presentation of a yearly record of the Alaska mineral industry is a continuing service that has been rendered by the Geological Survey from almost the earliest years of extensive mining in Alaska, and the present report for 1939, is the thirty-sixth of this series.These reports therefore serve miners, prospectors, and businessmen concerned with Alaska affairs as useful historical records, statements of contemporary conditions, and starting points on which some conjectures concerning future operations may be predicated."
Date: 1941
Creator: Smith, Philip S.
Partner: UNT Libraries Government Documents Department

Quicksilver Deposits of the Opalite District, Malheur County, Oregon and Humboldt County, Nevada

Description: From Introduction: "The Opalite quicksilver district includes two deposits with a considerable past production, one deposit with a small production, and one unproved prospect. These deposits are located along the circumference of a semicircular area that extends from a short distance west of McDermitt, Nev., for about 20 miles along the Oregon-Nevada State boundary. (See fig. 34). The area thus includes parts of Humboldt County, Nev., and Malheur County, Oreg.; almost the entire production has been derived from the portion in Oregon."
Date: 1942
Creator: Yates, Robert G.
Partner: UNT Libraries Government Documents Department