TSX-PLUS MULTI-TASKING UPGRADE FOR THE NICOLET L-11 POWDER DIFFRACTION SYSTEM.
J. Fitzpatrick, David L. Queen
1985, Conference Paper, Advances in X-Ray Analysis
In August of 1982, a single-user, dual-translator, automated powder diffraction system was purchased by the Denver Research Institute for use on project work in the Chemical and Materials Sciences Division. Within a short period of time, the system had already become saturated with users. Scheduling conflicts arose. In view of...
Adsorption and desorption of hexavalent chromium in an alluvial aquifer near Telluride, Colorado
Kenneth G. Stollenwerk, D.B. Grove
1985, Journal of Environmental Quality (14) 150-155
A laboratory investigation of reactions between hexavalent chromium [Cr(VI)] and alluvium was conducted to evaluate reactions of Cr(VI) contaminating an alluvial aquifer near Telluride, CO and to determine the mechanisms responsible for these reactions. Uncontaminated alluvium and groundwater (spiked with CrO42−) from the study site were used...
Scientific knowledge and modern prospecting
G. J. Neuerburg
1985, Mineralium Deposita (20) 30-32
Modern prospecting is the systematic search for specified and generally ill-exposed components of the Earth's crust known as ore. This prospecting depends entirely on reliable, or scientific knowledge for guidance and for recognition of the search objects. Improvement in prospecting results from additions and refinements to scientific knowledge. Scientific knowledge...
Source pulse enhancement by deconvolution of an empirical Green's function
Charles S. Mueller
1985, Geophysical Research Letters (12) 33-36
Observations of the earthquake source-time function are enhanced if path, recording-site, and instrument complexities can be removed from seismograms. Assuming that a small earthquake has a simple source, its seismogram can be treated as an empirical Green's function and deconvolved from the seismogram of a larger...
TRENDS IN BOREHOLE GEOPHYSICS FOR MINERAL EXPLORATION: ASSAYING AND REMOTE DETECTION.
Jeffrey J. Daniels
1985, Conference Paper, Preprint - Society of Mining Engineers of AIME
Several borehole geophysical techniques have been developed in recent years. Assaying technique development has been concentrated on nuclear methods, with some progress being made on using electrical and magnetic properties for mineral identification. Adaptation of conventional surface geophysical techniques to the borehole for locating near-misses of mineralized zones has led...
NUMERICAL MODELING OF FINE SEDIMENT PHYSICAL PROCESSES.
David H. Schoellhamer
1985, Conference Paper
Fine sediment in channels, rivers, estuaries, and coastal waters undergo several physical processes including flocculation, floc disruption, deposition, bed consolidation, and resuspension. This paper presents a conceptual model and reviews mathematical models of these physical processes. Several general fine sediment models that simulate some of these processes are reviewed. These...
RE-EVALUATION OF THE ORIGIN AND DIAGENESIS OF BORATE DEPOSITS, DEATH VALLEY REGION, CALIFORNIA.
Charles E. Barker, James M. Barker
Barker James M.Lefond Stanley J., editor(s)
1985, Conference Paper
An understanding of the age of the major borate deposits in the Furnace Creek Formation, their origin and facies relationships, as well as their diagenetic and thermal history, are integrated to provide a geological model of borate deposition in a heliothermal, saline, perennial lake....
Role of submarine canyons in shaping the rise between Lydonia and Oceanographer canyons, Georges Bank
Bonnie A. McGregor
1985, Marine Geology (62) 277-293
Three large submarine canyons, Oceanographer, Gilbert, and Lydonia, indent the U.S. Atlantic continental shelf and, with four additional canyons, dissect the continental slope in the vicinity of Georges Bank. On the upper rise, these canyons merge at a water depth of approximately 3100 m to form only two valleys. Differences...
URBAN STORMWATER INVESTIGATIONS BY THE U. S. GEOLOGICAL SURVEY.
Marshall E. Jennings
1985, Conference Paper
Urban stormwater hydrology studies in the U. S. Geological Survey are currently focused on compilation of national data bases containing flood-peak and short time-interval rainfall, discharge and water-quality information for urban watersheds. Current data bases, updated annually, are nationwide in scope. Supplementing the national data files are published reports of...
ORTHOPHOTOQUAD MAPPING PROGRAM FOR ALASKA.
James R. Plasker
1985, Conference Paper
The U. S. Geological Survey (USGS) is the lead civilian mapping agency in the United States and is responsible for creating and maintaining numerous map series. In Alaska the standard topographic map series is at a scale of 1:63,360, and maps at that scale have been available from the USGS...
Metasomatism, titanian acmite, and alkali amphiboles in lithic- wacke inclusions within the Coyote Peak diatreme, Humboldt County, California.
S.A. Czamanske, G.K. Atkin
1985, American Mineralogist (70) 499-516
Lithic-wacke inclusions within the alkali-ultramafic diatreme at Coyote Peak record a history of pronounced metasomatism and crystal growth. The dominant metasomatic changes were loss of Si from the inclusions and mass influx of K, due to an unusually high K activity in the ultramafic host. The reaction with K converted...
The age and origin of felsic intrusions of the Thetford Mines ophiolite, Quebec
D.A. Clague, C.S. Frankel, J.S. Eaby
1985, Canadian Journal of Earth Sciences (22) 1257-1261
The Thetford Mines ophiolite in southern Quebec was obducted in Early Ordovician time during the closing of the proto-Atlantic. The tectonized peridotite lower unit of the ophiolite is intruded by felsic dikes and pods including isolated lenses of massive rodingite, small bodies of strongly deformed diorite, and younger, less deformed...
Uranoan thorite in lithophysal rhyolite - Topaz Mountain, Utah, U.S.A.
Eugene E. Foord, Robert R. Cobban, Isabelle K. Brownfield
1985, Mineralogical Magazine (49) 729-731
Uranoan thorite crystals have been found occurring as a sparse constituent in lithophysae in 6.1 to 6.8 Ma alkali rhyolite flows at Thomas Mountain, Utah, USA. The crystals are associated with sandidine, quartz, topaz, hematite, magnetite, and calcite; they are leek to dark grass green, transparent, well-formed, euhedral prisms, showing...
RUNOFF, SEDIMENT TRANSPORT, AND SURFACE COLLAPSE AT A LOW-LEVEL RADIOACTIVE-WASTE BURIAL SITE NEAR SHEFFIELD, ILLINOIS.
John R. Gray, Charles A. Peters
Graves Donald H., editor(s)
1985, Conference Paper, University of Kentucky, Office of Engineering Services, (Bulletin) UKY BU
Runoff, sediment transport, and precipitation were measured in three gaged basins composing two-thirds of the 20-acre site, and in a 3. 5-acre basin located 0. 3 mile south of the site. Locations and dimensions of surface collapses at the site were recorded by the site contractor. Volumes of collapsed material...
Migration of wood-preserving chemicals in contaminated groundwater in a sand aquifer at Pensacola, Florida
D.F. Goerlitz, D.E. Troutman, E.M. Godsy, B.J. Franks
1985, Environmental Science & Technology (19) 955-961
Operation of a wood-preserving facility for nearly 80 years at Pensacola, FL, contaminated the near-surface groundwater with creosote and pentachlorophenol. The major source of aquifer contamination was unlined surface impoundments that were in direct hydraulic contact with the groundwater. Episodes of overtopping the impoundments and overland flow of treatment liquor...
Toxicity of the lampricides 3-trifluoromethyl-4-nitrophenol (TFM) and 2',5-dichloro-4'-nitrosalicylanilide (Bayer 73) to eggs and nymphs of the mayfly (Hexagenia sp.)
T.D. Bills, L. L. Marking, J.J. Rach
1985, Technical Report 47
Eggs and nymphs of mayflies (Hexagenia sp.) were exposed to the lampricides 3-trifluoromethyl-4- nitrophenol (TFM) and 2',5-dichloro-4'-nitrosalcylanilide (Bayer 73) and to a mixture of 98% TFM and 2% Bayer 73 (TFM-2B) to determine the sensitivity of various life stages to these compounds. Some eggs and newly hatched...
Classification of native vegetation at the Woodworth Station, North Dakota
M.I. Meyer
1985, Prairie Naturalist (17) 167-175
Native prairie areas on the Woodworth Station were sampled, classified, described, and mapped. Transect sites were selectively located along different soil moisture gradients. Data were collected from 292 plots using a modified Braun-Blanquet cover estimation technique. Trees and tall shrubs (over 2 m) were not sampled because they made up...
Sulphur in char and char desulphurization by acid leaching and hydropyrolysis
I.-M. Chou, D.M. Loffredo
1985, Fuel (64) 731-734
Sulphur compounds volatilized during pyrolysis of acid-leached char were measured to determine characteristics of char desulphurization reactions. Pyrolysis of char in a hydrogen atmosphere (hydropyrolysis) produced a much higher concentration of thiophenic organics compared with that produced during pyrolysis in a nitrogen atmosphere. Hydrogen sulphide gas evolution, at progressively increasing...
Ice-lubricated gravity spreading of the Olympus Mons aureole deposits
K. L. Tanaka
1985, Icarus (62) 191-206
Gravity sliding and spreading at low strain rates can account for the general morphology and structure of the aureoles and basal scarp of Olympus Mons. Detachment sliding could have occurred around the volcano if either pore-fluid pressures were exceptionally high (greater than 90%) or the rocks had very low resistance...
Saudi Arabian seismic-refraction profile: A traveltime interpretation of crustal and upper mantle structure
Walter D. Mooney, M. E. Gettings, H. R. Blank, J. H. Healy
1985, Tectonophysics (111) 173-246
The crustal and upper mantle compressional-wave velocity structure across the southwestern Arabian Shield has been investigated by a 1000-km-long seismic refraction profile. The profile begins in Mesozoic cover rocks near Riyadh on the Arabian Platform, trends southwesterly across three major Precambrian tectonic provinces, traverses Cenozoic rocks of the coastal plain...
Total chemical management in photographic processing
Charles Luden, Ronald Schultz
1985, Journal of Imaging Technology (11) 74-82
The mission of the U. S. Geological Survey's Earth Resources Observation Systems (EROS) Data Center is to produce high-quality photographs of the earth taken from aircraft and Landsat satellite. In order to meet the criteria of producing research-quality photographs, while at the same time meeting strict environmental restrictions, a total...
Character and regional significance of Great Falls tectonic zone, east-central Idaho and west-central Montana
J. Michael O’Neill, David A. Lopez
1985, American Association of Petroleum Geologists Bulletin (69) 437-447
The Great Falls tectonic zone, here named, is a belt of diverse northeast-trending geologic features that can be traced from the Idaho batholith in the Cordilleran miogeocline, across thrust-belt structures and basement rocks of west-central and southwestern Montana, through cratonic rocks of central Montana, and into southwesternmost Saskatchewan, Canada. Geologic...
Digital to analog conversion and visual evaluation of Thematic Mapper data
James R. McCord, Douglas R. Binnie, Paul M. Seevers
1985, Journal of Imaging Technology (11) 125-130
As a part of the National Aeronautics and Space Administration Landsat D Image Data Quality Analysis Program, the Earth Resources Observation Systems Data Center (EDC) developed procedures to optimize the visual information content of Thematic Mapper data and evaluate the resulting photographic products by visual interpretation. A digital-to-analog transfer function...
The timing of ore formation in southeast Missouri: Rb-Sr glauconite dating at the Magmont mine, Viburnum trend
H. J. Stein, S.A. Kish
1985, Economic Geology (80) 739-753
Seven Bonneterre and Davis Formation glauconite samples from the Magmont mine area, Viburnum Trend, southeast Missouri, yield a 359 + or - 22-m.y. Rb-Sr isochron with an initial 87 Sr/ 86 Sr ratio of 0.7234 + or - 0.0273 (2 sigma). Gangue calcite from the ore zone has an 87 Sr/ 86 Sr ratio of approximately 0.7112. The...
Bottom current and sediment transport on San Pedro Shelf, California
David E. Drake, David A. Cacchione, Herman A. Karl
1985, Journal of Sedimentary Research (55) 15-28
GEOPROBE (Geological Processes Bottom Environmental) tripods were used to measure bottom currents, pressure, and light transmission and scattering and to obtain time-series photographs of the sea floor at depths of 23 m and 67 m on San Pedro shelf between 18 April and 6 June 1978. Winds were light (<...
