Reservoir processes and fluid origins in the Baca geothermal system, Valles Caldera, New Mexico
A.H. Truesdell, C. J. Janik
1986, Journal of Geophysical Research Solid Earth (91) 1817-1833
At the Baca geothermal field in the Valles caldera, New Mexico, 19 deep wells were drilled in an attempt to develop a 50-MWe (megawatts electric) power plant. The chemical and isotopic compositions of steam and water samples have been used to indicate uniquely the origin of reservoir fluids and natural reservoir...
Identifying hydraulically conductive fractures with a slow-velocity borehole flowmeter
Alfred E. Hess
1986, Canadian Geotechnical Journal (23) 69-78
The U.S. Geological Survey used a recently developed heat-pulse flowmeter to measure very slow borehole axial water velocities in granitic rock at a site near Lac du Bonnet, Manitoba, Canada. The flowmeter was used with other geophysical measurements to locate and identify hydraulically conducting fractures contributing to the very slow...
The boundary model: A geographical analysis of design and conservation of nature reserves
C. Schonewald-Cox, J.W. Bayless
1986, Biological Conservation (38) 305-322
It is widely recognised that nearly all parks and reserves are too small to protect their biological diversity. In response to this problem, we have been developing a multidisciplinary ‘boundary model’ that focuses upon the processes of exchange across the administrative edges of nature reserves. The model incorporates known dynamics...
Thermal comfort of the elderly is affected by clothing, activity and psychological adjustment
K. Cena, J.R. Spotila, H.W. Avery
1986, Transactions of the American Society of Heating, Refrigerating, and Air-conditioning Engineers (ASHRAE) (96) 329-342
Experimentally, whirling disease infectivity survives but for a few days
M.E. Markiw
1986, Research Information Bulletin 86-40
No abstract available at this time...
Proliferative kidney disease in salmonid fishes
R.P. Hedrick, M.L. Kent, C. E. Smith
1986, Fish Disease Leaflet 74
No abstract available at this time...
Feeding activity, rate of consumption, daily ration, and prey selection of major predators in John Day Reservoir - Section II, predation control measures
D.E. Palmer, H.C. Hansel, J.M. Beyer, S.C. Vigg, W. T. Yasutake, P.T. Lofy, S.D. Duke, M.J. Parsley, M.G. Mesa, L.A. Prendergast, R. Burkhardt, C. Burley, D.W. Eib, T.P. Poe
1986, Report
No abstract available ...
Seismic Computerized Alert Network
Henry Spall, editor(s)
1986, Earthquakes & Volcanoes (USGS) (18) 153-153
In 1985 the USGS devised a model for a Seismic Computerized Alert Network (SCAN) that would use continuous monitoring of seismic data from existing types of instruments to provide automatic, highly-reliable early warnings of earthquake shaking. In a large earthquake, substantial damaging ground motions may occur at great distances from...
Preliminary estimates of loss of juvenile anadromous salmonids to predators in John Day Reservoir and development of a predation model
B.E. Reiman, R.C. Beamesderfer, A.A. Nigro, S.C. Vigg, H.C. Hansel, D.E. Palmer
1986, Report
No abstract available ...
Relationship of grade, tonnage, and basement lithology in volcanic-hosted epithermal precious-and base-metal quartz-adularia-type districts
D.L. Mosier, Donald A. Singer, T. Sato, N.J. Page
1986, Mining Geology (36)
Examination of grades, tonnages, and basement rocks for 88 epithermal precious- and base-metal quartz-adularia-type districts in North, Central, and South America, and Japan reveals that the type of basement rock below the mineralized veins is useful for predicting grade and size of deposits. Epithermal districts overlying basement with salt and...
Seismically induced landslides: current research by the US Geological Survey.
E. L. Harp, R. C. Wilson, D. K. Keefer, G. F. Wieczorek
1986, Geologia Applicata e Idrogeologia (21) 159-173
We have produced a regional seismic slope-stability map and a probabilistic prediction of landslide distribution from a postulated earthquake. For liquefaction-induced landslides, in situ measurements of seismically induced pore-water pressures have been used to establish an elastic model of pore pressure generation. -from Authors...
Recalibration and predictive reliability of a solute-transport model of an irrigated stream-aquifer system
M. Person, Leonard F. Konikow
1986, Journal of Hydrology (87) 145-165
A solute-transport model of an irrigated stream-aquifer system was recalibrated because of discrepancies between prior predictions of ground-water salinity trends during 1971-1982 and the observed outcome in February 1982. The original model was calibrated with a 1-year record of data collected during 1971-1972 in an 18-km reach of the Arkansas...
Development of labd cover and terrain databases for the Innoko National Wildlife Refuge, Alaska, using LANDSAT and digital terrain data
Carl J. Markon, Stephen S. Talbot
1986, Conference Paper, Technical Papers of the American Society of Photogrammetry, Fall Technical Meeting
Landsat-derived land cover maps and associated elevation, slope, and aspect class maps were produced for the Innoko National Wildlife Refuge (3,850,000 acres; 1,555,095 hectares) in northwestern Alaska. These maps and associated digital data products are being used by the U. S. Fish and Wildlife Service for wildlife management, research, and...
Geology of the peralkaline volcano at Pantelleria, Strait of Sicily
G.A. Mahood, W. Hildreth
1986, Bulletin of Volcanology (48) 143-172
Situated in a submerged continental rift, Pantelleria is a volcanic island with a subaerial eruptive history longer than 300 Ka. Its eruptive behavior, edifice morphologies, and complex, multiunit geologic history are representative of strongly peralkaline centers. It is dominated by the 6-km-wide Cinque Denti caldera, which formed ca. 45 Ka...
Internal structural variations in a debris-avalanche deposit from ancestral Mount Shasta, California, USA
T. Ui, H. Glicken
1986, Bulletin of Volcanology (48) 189-194
Various parameters of the internal structure of a debris-avalanche deposit from ancestral Mount Shasta (size and percentage of block facies in each exposure, number and width of jigsaw cracks, and number of rounded clasts in matrix facies) were measured in order to study flow and emplacement mechanisms. Three types of...
SALTON SEA SCIENTIFIC DRILLING PROJECT: SCIENTIFIC PROGRAM.
J.H. Sass, W.A. Elders
1986, Bulletin. Geothermal Resources Council 21-26
The Salton Sea Scientific Drilling Project, was spudded on 24 October 1985, and reached a total depth of 10,564 ft. (3. 2 km) on 17 March 1986. There followed a period of logging, a flow test, and downhole scientific measurements. The scientific goals were integrated smoothly with the engineering and...
Sr, Nd and Pb isotopes in Proterozoic intrusives astride the Grenville Front in Labrador: Implications for crustal contamination and basement mapping
L.D. Ashwal, J. L. Wooden, R.F. Emslie
1986, Geochimica et Cosmochimica Acta (50) 2571-2585
We report Sr, Nd and Pb isotopic compositions of mid-Proterozoic anorthosites and related rocks (1.45-1.65 Ga) and of younger olivine diabase dikes (1.4 Ga) from two complexes on either side of the Grenville Front in Labrador. Anorthositic or diabasic samples from the Mealy Mountains (Grenville Province) and Harp Lake (Nain-Churchill...
Fumarole emissions at Mount St. Helens volcano, June 1980 to October 1981: Degassing of a magma-hydrothermal system
T.M. Gerlach, T. J. Casadevall
1986, Journal of Volcanology and Geothermal Research (28) 141-160
This study is an investigation of the chemical changes in the Mount St. Helens fumarole gases up to October 1981, the sources of the fumarole gases, and the stability of gas species in the shallow magma system. These problems are investigated by calculations of element compositions, thermodynamic equilibria, and magmatic...
USGS NATIONAL MAPPING PROGRAM IN ALASKA--A STATUS REPORT.
Bruce Y. Mckenzie, Lowell E. Starr
1986, Conference Paper, Technical Papers of the American Society of Photogrammetry, Fall Technical Meeting
The U. S. Geological Survey has been involved in mapping in Alaska since the late 1800's. The initial mapping projects were principally in support of geologic or hydrologic studies. In the late 1940's, responsibility for Alaska mapping was assigned to the Geological Survey's Rocky Mountain Mapping Center and a comprehensive...
Repetitive digital NOAA-AVHRR data for Alaskan engineering and scientific applications
William M. Christie, Robert J. Pawlowski, Michael D. Fleming
1986, Conference Paper, Technical Papers of the American Society of Photogrammetry, Fall Technical Meeting
Selected digitally enhanced NOAA - Advanced Very High Resolution Radiometer (AVHRR) images taken by the NOAA 6, 7, 8 and 9 Polar Orbiting Satellites demonstrate the capability and application of repetitive low-resolution satellite data to Alaska's engineering and science community. Selected cloud-free visible and thermal infrared images are enhanced to...
Geochemical data for samples of rock, stream sediment, and nonmagnetic heavy-mineral concentrate from the South Sierra Wilderness and the South Sierra Roadless Area, southern Sierra Nevada, California
M. F. Diggles, D.E. Detra, R. E. Tucker, K. A. Romine
1986, Open-File Report 86-359
No abstract available....
10Be distribution in soils from Merced River terraces, California
M.J. Pavich, L. Brown, J. Harden, J. Klein, R. Middleton
1986, Geochimica et Cosmochimica Acta (50) 1727-1735
The distribution and residence time of cosmogenic 10Be in clay-rich soil horizons is fundamental to understanding and modelling the migration of 10Be on terrestrial sediments and in groundwater solutions. We have analyzed seven profiles of clay-rich soils developed from terrace sediments of the Merced River, California. The terraces and soils of increasing...
QUANTIFICATION OF INSTREAM FLOW NEEDS OF A WILD AND SCENIC RIVER FOR WATER RIGHTS LITIGATION.
Herbert S. Garn
1986, Water Resources Bulletin (22) 745-751
The lower 4 miles of the Red River, a tributary of the Rio Grande in northern New Mexico, was designated as one of the 'instant' components of the National Wild and Scenic River System in 1968. Instream flow requirements were determined by several methods to quantify the claims made by...
U. S. GEOLOGICAL SURVEY'S SIDE-LOOKING AIRBORNE RADAR PROGRAM: THE ALASKAN CONNECTION.
Allan N. Kover, John Edwin Jones, Stephen J. Gawarecki
1986, Conference Paper, Technical Papers of the American Society of Photogrammetry, Fall Technical Meeting
The U. S. Geological Survey (USGS) has become a major source of side-looking airborne radar (SLAR) data as a result of a Congressional mandate in 1980 to 'begin the use of side-looking airborne radar for topographic and geologic mapping, and geological resource surveys in promising areas, particularly Alaska. ' In...
Geophysics: A reversal of geomagnetic polarity
Edward A. Mankinen
1986, Physics Bulletin (37) 287-288
The detailed behaviour of the geomagnetic field during reversals is documented by palaeomagnetists to constrain models of the geomagnetic dynamo. Reversals are studied by measuring the magnetic remanence preserved in rocks to obtain both the direction and intensity of the ancient magnetic field....
