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Verl Richard Wilmarth

Publications and source records attributed to Verl Richard Wilmarth.

9 recordsLinked to original sources
USGS1959

A Summary interpretation of geologic, hydrologic, and geophysical data for Yucca Valley, Nevada test site, Nye County, Nevada

This report summarizes an interpretation of the geology of Yucca Valley to depths of about 2,300 feet below the surface, the characteristics features of ground water in Yucca and Frenchman Valleys, and the seismic, gravity, and magnetic data for these valleys. Compilation of data, preparation of illustrations, and writing of the report were completed during the period December 26, 1958 to January 10, 1959. Some of the general conclusions must be considered as tentative until more data are available. This work was done by the U.S. Geological Survey on behalf of Albuquerque Operations Office, U.S. Atomic Energy Commission.

Nevada↗
USGS1959

Geology of the Marble exploration hole 4, Nevada Test Site, Nye County, Nevada

The Marble exploration hole 4 was drilled to determine the chemical and physical properties of marble from the surface to depth of about 1,200 feet. The drill hole is in the north-central part of the Tippipah Spring quadrangle, approximately 40 miles north of Mercury, Nev. The collar of the hole is at an elevation of 5,490.28 feet and has the Nevada State grid coordinates of N. 904,480.13 and E. 637,758.38. The hole is accessible by a graded dirt road easily traversed by heavy construction equipment, that connects to the highway between Mercury and Groom Lake. The hole was core drilled by Minerals Engineering Company, Grand Junction, Colo., with a 2,000-foot capacity Portadrill drilling rig and conventional NX coring equipment. Drilling was started July 13, and completed August 30, 1959. The drilling fluid was water for most of the hole. At some places in the hole, where loss of drilling fluid was high, the water was thickened with bentonitic mud. At 1,103 feet, presumed caving of the hole caused the drill stem to stick so that it could not be withdrawn; subsequently about 920 feet of the drill stem was recovered. The hole was then reamed to 800 feet and cemented from 785 to 855 feet. A whipstock was emplaced at depth of 805 feet so that the hole, which was vertical to this depth, would be deflected 4° from the vertical. Core was recovered for this part of the hole from 1,088 to 1,187 feet, the total depth. Seven feet of 8-inch outside diameter casing was set from the collar. This report summarizes the information obtained during preparation of the lithologic log of the core and presents results of chemical analyses of marble samples collected from surface near the drill hole. The report was prepared by the U.S. Geological Survey on behalf of the Albuquerque Operations Office, U.S. Atomic Energy Commission. The writers acknowledge the assistance of Mr. John Foster, drilling foreman for Minerals Engineering Company and Mr. Walter A. Johnson, field engineer for Holmes and Narver, Inc., the engineering-contracting firm.

Nevada↗
USGS1953

Yellow Canary uranium deposits, Daggett County, Utah

The Yellow Canary uranium deposit is on the west side of Red Creek Canyon in the northern part of the Uinta Mountains, Daggett County, Utah. Two claims have been developed by means of an adit, three opencuts, and several hundred feet of bulldozer trenches. No uranium ore has been produced from this deposit. The deposit is in the pre-Cambrian Red Creek quartzite. This formation is composed of intercalated beds of quartzite, hornblendite, garnet schist, staurolite schist, and quartz-mica schist and is intruded by dioritic dikes. A thick unit of highly fractured white quartzite near the top of the formation contains tyuyamunite as coatings on fracture surfaces. The tyuyamunite is associated with carnotite, volborthite, iron oxides, azurite, malachite, brochantite, and hyalite. The uranium and vanadium minerals are probably alteration products of primary minerals. The uranium content of 15 samples from this property ranged from 0.000 to 0.57 percent.

Circular↗
USGS1952

Results of diamond drilling and geologic investigation of the Shirley May (Garo) uranium deposit, Park County, Colorado

The Shirley May (Garo) uranium deposit near Garo, Park County, Colo., consists of tyuyamunite and carnotite that occur as disseminations and as fracture fillings in three beds of medium- to coarse-grained sandstone. The sandstones are in the Maroon formation of Permian age. This deposit was explored by means of 12 core-drill holes, totalling 2,003 feet. The deposit is on the northeast flank of the Garo anticline, a local structure that probably is related to Tertiary tectonic movement. In the vicinity of the deposit the sedimentary rocks strike northwest and dip steeply. They are cut by numerous northerly-trending faults that have horizontal displacements of as much as 1,000 feet. The ore minerals tyuyamunite, carnotite, volborthite, calciovolborthite, malachite, azurite, chalcocite(?) , and an unidentified yellow to dark-red vanadium oxide are restricted to a complexly faulted area. The ore body that has yielded most of the uranium ore is in the uppermost ore-bearing sandstone (bed no. 1) and is stratigraphically 50 and 150 feet above the ore horizons in sandstones nos. 2 and 3, respectively. The uranium content of samples from the mine workings ranges from 0. 001 to 0. 48 percent uranium; dump samples contain as much as 2.39 percent uranium. A total of 40 tons of uranium ore, averaging 1.0 percent uranium, was produced in 1919.

Colorado↗