Principal facts for gravity observations in the Charles Sheldon Antelope Range, Nevada-Oregon

Plouff, Donald; Robbins, S.L.; Holden, K.D.

doi:10.3133/ofr76601

Cited by 4 publications

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“…New information about the Late Ordovician pelecypod Coralldomus Whitfield, shows clearly that it was a facultative borer, and provides the oldest documented record of this mode of life in the class Pelecypoda (Pojeta and Palmer, 1976).…”

Section: Paleozoic Studies Early Paleozoic Pelecypodsmentioning

confidence: 97%

“…Gravity data reported by Donald Plouff, S. L. Robbins, and K. D. Holden (1976) were used to delineate a previously unreported caldera located about 70 km southwest of Denio, Nev., in the Charles Sheldon Antelope Range. The site of the probable caldera is marked by a 16*25-km 18-mGal gravity minimum and by a nearly coincident 230-gamma magnetic minimum (U.S. Geological Survey, 1972).…”

Section: Geophysical Discovery Of Caldera In Northwestern Nevadamentioning

confidence: 99%

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Geological Survey research 1977

1977

Professional Paper

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Most of those who use this volume of the Geological Survey ResearchSeries will come to it primarily to learn about the progress of research in a particular field, or in a group of fields that are closely related. The Geological Survey Research series serves another purpose also an overview of earth sciences research in progress in the USGS and an indication of the emphasis being given to individual subjects. Few will have the interest or stamina to read Geological Survey Research 1977 from cover to cover, but a few minutes spent on the table of contents will be sufficient to identify the areas that are receiving increased attention.Because the USGS is a mission-oriented, public service organization, its work responds to the Federal government's perception of public needs. These needs for information about the Earth and its resources and for knowledge of geologic processes and history have been broadening and deepening in recent years in the United States, which has led in turn to expanded investigations in many fields such as the Outer Continental Shelf, earthquake hazards reduction, geothermal energy, river-quality assessment, and water use, to name only a few of them in which little or no research was underway only a decade ago.These trends toward expanded and broadened earth sciences research and factfinding are bound to continue as problems of resource adequacy, environmental quality, and safe use of the land become more complex and difficult, and more critical to the National Welfare.

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Section: Paleozoic Studies Early Paleozoic Pelecypodsmentioning

confidence: 97%

Section: Geophysical Discovery Of Caldera In Northwestern Nevadamentioning

confidence: 99%

Geological Survey research 1977

1977

Professional Paper

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“…The following datum shifts were determined in the Reno 1° by 2° quadrangle by Plouff (1994) and, except for the California part and the Winnemucca 1° by 2° quadrangle , were applied to the rest of the study and adjacent areas. A datum shift of 0.55 mGal was subtrrcted for data from source #2649 and 0.10 mGal was subtracted (also Plouff, 1976) for data from sources #5116 and #5130. Numerous ties indicated that no consistent datum shift should be applied to observed-gravity values in source #2179 although 0.25 mGal was added to observed-gravity values in the Tonopah 1° by 2° quadrangle to the southeast of the study area (Plouff, 1990, table 2).…”

Section: Data From the National Geophysical Data Centermentioning

confidence: 99%

“…Donald Plouff (1976Plouff ( ,1977a conducted a gravity survey to delineate caldera system near McDermitt, Nevda and the adjacent area in Oregon (in files PLOUFMCD.ISN, OREG95.ISN, and PLOUFVYA.ISN). Based on direc* ties to the DMA McDermitt base station (table 4), the datum of observed gravity was converted by Plouff (1977b) to the IGSN-71 datum by subtracting 14.50 mGal from the originally published values.…”

Section: Study Of Mcdermitt Areamentioning

confidence: 99%

Principal facts and field observations for gravity data in and adjacent to the Bureau of Land Management's Winnemucca District and Surprise Resource Area, northwest Nevada and northeast California

Plouff¹

1996

Open-File Report

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COMPILATION METHODSSteps to improve quality during the compilation of existing gravity data were to delete duplicate data, to correct or delete erroneous data, and to evaluate the accuracy of accepted data. Duplicate data could not be easily identify when previous compilers modified values of observed gravity, modified locations, or copied earlier data into their sets and then substituted different station names. The pattern of two sets of sequence numbers at associated data points ofter could be recognized except in cases where a later compiler modified locations or sorted data points by their latitude and then replaced original station numbers with numerical sequence numbers. Unless a less accurate data point is close! ' surrounded by data points of a less accurate data set or the data set with generally higher accuracy apparently cipied the less accurate data point, the less accurate data point was discarded.Data points with the same station names as other data points or without a station name, which occurred in subsets of data from the National Geophysical Data Center (table 2), were assigned unique station names. Data points located near spot elevations or bench marks, near cultural features such as roads or marked section corners, or arranged along regularly-spaced lines or grids generally were accepted with minor modifications. The last method for identifying data points to be rejected, corrected, or accepted was to look for conspicuous disagreements (forming one-station "bnllseye"

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Mineral resources of the Sheldon Contiguous Wilderness Study Area, Washoe County, Nevada

Bergquist¹,

Plouff²,

Esparza³

1988

Open-File Report

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The part of the Sheldon Contiguous Wilderness Study Area (CA-020-1012) requested for mineral surveys encompasses 780 acres in the high desert of northwestern Nevada. Geological, geochemical, geophysical, and mineral surveys were conducted by the U.S. Geological Survey and the U.S. Bureau of Mines in 1985 to assess the mineral resources (known) and mineral resource potential (undiscovered) of the study area. There are no identified resources within the study area. There is low potential for undiscovered gas resources and low potential for mercury, gold, and silver resources beneath the basalt. Basalt overlies the entire study area and has a number of commercial uses, but it is not classified as a resource because basalt is abundant in the region and other sources are closer to existing markets. In this report, references to the "Sheldon Contiguous Wilderness Study Area" or the "study area" refer only to lands for which mineral surveys were requested by the U.S. Bureau of Land Management.

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Principal facts for gravity observations in the Charles Sheldon Antelope Range, Nevada-Oregon

Cited by 4 publications

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Geological Survey research 1977

Geological Survey research 1977

Principal facts and field observations for gravity data in and adjacent to the Bureau of Land Management's Winnemucca District and Surprise Resource Area, northwest Nevada and northeast California

Mineral resources of the Sheldon Contiguous Wilderness Study Area, Washoe County, Nevada

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