Reference samples for use in analytical geochemistry: their availability, preparation, and appropriate use
J. S. Kane
1992, Journal of Geochemical Exploration (44) 37-63
A large number of certified and other reference samples are available for use in analytical geochemistry. Certified materials are preferred, but of much more limited availability than other reference samples for most geochemical applications. The availability of rock, sediment, soil, water,...
Baseline element concentrations in soils and plants, Wattenmeer National Park, North and East Frisian Islands, Federal Republic of Germany
R. C. Severson, L. P. Gough, G. van den Boom
1992, Water, Air, & Soil Pollution (61) 169-184
Baseline element concentrations are given for dune grass (Ammophilia arenaria), willow (Salix repens), moss (Hylocomium splendens) and associated surface soils. Baseline and variability data for pH, ash, Al, As, Ba, C, Ca, Cd, Ce, Co, Cr, Cu, Fe, Hg, K, La, Li, Mg, Mn, Na, Nb, Nd, Ni, P, Pb,...
Environmental benefits vs. costs of geologic mapping
S.B. Bhagwat, R. C. Berg
1992, Environmental Geology and Water Sciences (19) 33-40
Boone and Winnebago Counties, Illinois, U.S.A., were selected for this study, required by the Illinois State Senate, because mapping and environmental interpretations were completed there in 1981. Costs of geologic mapping in these counties in 1990 dollars were $290,000. Two estimates of costs of statewide mapping were made, one extrapolated...
Residence times in river basins as determined by analysis of long-term tritium records
R. L. Michel
1992, Journal of Hydrology (130) 367-378
The US Geological Survey has maintained a network of stations to collect samples for the measurement of tritium concentrations in precipitation and streamflow since the early 1960s. Tritium data from outflow waters of river basins draining 4500–75000 km2 are used to determine average residence times of water within the basins. The...
Impact of bacterial kidney disease on Chinook salmon smolts during migration, collection, and transportation
D.G. Elliott
1992, Conference Paper, Proceedings of the Chinook Salmon Smolt survival workshop
No abstract available ...
A quantitative link among mineral deposit modeling, geoscience mapping, and exploration-resource assessment
C. F. Chung, C. W. Jefferson, D.A. Singer
1992, Economic Geology (87) 194-197
No abstract available....
Predicting sizes of undiscovered mineral deposits; an example using mercury deposits in California
C. F. Chung, Donald A. Singer, W. David Menzie
1992, Economic Geology (87) 1174-1179
A critical part of the exploration for mineral deposits or of quantitative mineral resource assessments is the estimation of how large undiscoveredeposits might be. Typically, this problem is addressed using grade and tonnage models in which a major source of variation in possible sizes is accounted for by the differences...
Hydrology of the Cave Springs area near Chattanooga, Hamilton County, Tennessee
Arthur D. Bradfield
1992, Water-Resources Investigations Report 92-4018
The hydrology of Cave Springs, the second largest spring in East Tennessee was investigated from July 1987 to September 1989. Wells near the spring supply about 5 million gallons per day of potable water to people in Hamilton County near Chattanooga. Discharge from the spring averaged about 13.5 cubic feet...
Notes: Differences in stocks of American shad from the Columbia and Delaware rivers
D. V. Rottiers, Lori A. Redell, H.E. Booke, S. Amaral
1992, Transactions of the American Fisheries Society (121) 132-136
American shad Alosa sapidissima from the Columbia River on the Pacific coast and the Delaware River on the Atlantic coast were reared from 3 June to 24 October 1986 in two adjacent hypalon‐lined ponds. Although fish from the Columbia River were introduced into ponds 29 d after those from the Delaware River,...
Quantitative assessment of future development of cooper/silver resources in the Kootenai National Forest, Idaho/Montana: Part I-Estimation of the copper and silver endowments
G.T. Spanski
1992, Nonrenewable Resources (1) 163-183
Faced with an ever-increasing diversity of demand for the use of public lands, managers and planners are turning more often to a multiple-use approach to meet those demands. This approach requires the uses to be mutually compatible and to utilize the more valuable attributes or resource values of the land....
Large lake basins of the southern High Plains: Ground-water control of their origin?
W.W. Wood, W. E. Sanford, C.C. Reeves Jr.
1992, Geology (20) 535-538
The origin of the ∼40-50 topographically large lake basins on the southern High Plains of Texas and New Mexico has been an enigma. Previous workers have considered deflation or evaporite dissolution at depth and subsequent collapse as the most probable mechanisms. However, the eolian hypotheses have been unable to provide...
Mixed-mode isolation of triazine metabolites from soil and aquifer sediments using automated solid-phase extraction
M. S. Mills, E.M. Thurman
1992, Analytical Chemistry (64) 1985-1990
No abstract available. ...
Extraction of whole versus ground source rocks: Fundamental petroleum geochemical implications including oil-source rock correlation
L.C. Price, J.L. Clayton
1992, Geochimica et Cosmochimica Acta (56) 1213-1222
In petroleum geochemistry, extractable hydrocarbons (HCs) in source rocks have typically been studied by grinding the rock to a fine powder (≤100 mesh) and then extracting the HCs from the rock with a solvent. This procedure carries the implicit assumption that the HCs are homogeneously distributed throughout the rock. However,...
An unusual occurrence of arsenic-bearing pyrite in the Upper Freeport coal bed, West-Central Pennsylvania
L.F. Ruppert, J.A. Minkin, J. J. McGee, C. B. Cecil
1992, Energy & Fuels (6) 120-125
Scanning electron microscopy and electron microprobe analysis were used to identify a rare type of As-bearing pyrite in selected specific gravity separates from the Pennsylvanian age Upper Freeport coal bed, west-central Pennsylvania. Arsenic was detected mainly in cell-wall replacement pyrite where concentrations ranged from nondetectable to 1.9 wt %. Although...
Origin of stratiform sediment-hosted manganese carbonate ore deposits: Examples from Molango, Mexico, and TaoJiang, China
P.M. Okita, Wayne C. Shanks III
1992, Chemical Geology (99) 139-163
Carbonate and sulfide minerals from the Molango, Mexico, and TaoJiang, China, Mn deposits display similar and distinctive ??34S and ??13C patterns in intervals of manganese carbonate mineralization. ??13C-values for Mn-bearing carbonate range from -17.8 to +0.5??? (PDB), with the most negative values occurring in high-grade ore zones that are composed...
Determination of malachite green and its leuco form in water
J. L. Allen, J.R. Meinertz, J.E. Gofus
1992, Journal of AOAC International (75) 646-649
Liquid chromatographic (LC) analysis can detect malachite green residues in water at less than 10µg/L. Water samples were concentrated on disposable diol columns, eluted with 0.05M p-toluenesulfonic acid in methanol, and determined by reversed- phase LC. When combined with a lead oxide postcolumn reactor, the LC method can simultaneously...
The effect of rock type, grain size, sorting, permeability, and moisture on measurements of radon in soil gas: A comparison of two measurement techniques
L.C.S. Gundersen
1992, Conference Paper, Journal of Radioanalytical and Nuclear Chemistry
Soil surveys of radon conducted in the Coastal Plain of New Jersey, Alabama and Texas indicate that soil composition and grain size exert the strongest control on the concentration of radon measured. Soil-gas radon was measured in-situ using two techniques; one developed by G. Michael REIMER of the U.S. Geological...
Cadmium and mercury in emergent mayflies (Hexagenia bilineata) from the upper Mississippi River
J. Therese Dukerschein, James G. Wiener, Ronald G. Rada, Mark T. Steingraeber
1992, Archives of Environmental Contamination and Toxicology (23) 109-116
Burrowing mayflies (Hexagenia bilineata) were analyzed to assess longitudinal patterns in their cadmium and mercury content along the upper Mississippi River. Emergent mayflies (subimagoes and imagoes) were collected in 1988 at 34 sites (25 navigation pools), extending 1260 km from Little Falls, Minnesota, downstream to St. Louis, Missouri. Cadmium concentrations...
The Galileo Solid-State Imaging experiment
M. J. S. Belton, K.P. Klaasen, M.C. Clary, J. L. Anderson, C.D. Anger, M. H. Carr, C. R. Chapman, M. E. Davies, R. Greeley, D. Anderson, L.K. Bolef, T.E. Townsend, R. Greenberg, J. W. Head III, G. Neukum, C.B. Pilcher, J. Veverka, P.J. Gierasch, F. P. Fanale, A.P. Ingersoll, H. Masursky, D. Morrison, James B. Pollack
1992, Space Science Reviews (60) 413-455
The Solid State Imaging (SSI) experiment on the Galileo Orbiter spacecraft utilizes a high-resolution (1500 mm focal length) television camera with an 800 ?? 800 pixel virtual-phase, charge-coupled detector. It is designed to return images of Jupiter and its satellites that are characterized by a combination of sensitivity levels, spatial...
Deep Sea Drilling Project Site 612 bolide event: New evidence of a late Eocene impact-wave deposit and a possible impact site, US east coast
W. Wei, C. Wylie Poag, Lawrence J. Poppe, David W. Folger, David S. Powars, Robert B. Mixon, Lucy E. Edwards, Scott Bruce
1992, Geology (20) 771-774
A remarkable >60-m-thick, upward-fining, polymictic, marine boulder bed is distributed over >15 000 km2 beneath Chesapeake Bay and the surrounding Middle Atlantic Coastal Plain and inner continental shelf. The wide varieties of clast lithologies and microfossil assemblages were derived from at least seven known Cretaceous, Paleocene, and Eocene stratigraphic units....
Manganese carbonate mineralization in the Molango district, Mexico
P.M. Okita
1992, Economic Geology (87) 1345-1366
The Molango manganese deposit in Mexico is by far the largest known Mn deposit in North America. Mn carbonate mineralization is hosted by a finely laminated Upper Jurassic marine sedimentary sequence that forms the base of the Chipoco facies of the Taman Formation (Kimmeridgian). Manganese enrichment occurs over a total...
Field guide: Gold-copper-silver deposits of the New World District Northwest Geology
J. E. Elliot, A. R. Kirk, T.W. Johnson
J. E. Elliott, editor(s)
1992, Book chapter, Guidebook for the Red Lodge-Beartooth Mountains-Stillwater area
No abstract available ...
Determination of hatching date for eggs of black-crowned night-herons, snowy egrets and great egrets
T. W. Custer, G.W. Pendleton, R.W. Roach
1992, Journal of Field Ornithology (63) 145-154
Floatation of eggs in water and specific gravity of eggs of Black-crowned Night-Herons (Nycticorax nycticorax ), Snowy Egrets (Egretta thula ) and Great Egrets (Casmerodius albus ) were evaluated as methods to determine date of hatching. Although specific gravity was a better predictor of hatching date than egg...
Morphology of ruffe (Gymnocephalus cernuus) protolarvae from the St. Louis River, Lake Superior
John R. P. French III, Thomas A. Edsall
1992, Journal of Freshwater Ecology (7) 59-68
We describe hatching and the morphological and meristic characteristics of 2.5-5.6 mm long ruffe protolarvae (Gymnocephalus cernuus). Eggs and sperm from St. Louis River ruffe were mixed, producing fertilized eggs that were 0.9-1.2 mm in diameter. Newly hatched protolarvae were 2.5-3.2 mm long. They had 14-15 preanal...
U-Pb dating of uranium deposits in collapse breccia pipes of the Grand Canyon region
K.R. Ludwig, K. R. Simmons
1992, Economic Geology (87) 1747-1765
Two major periods of uranium mineralization are indicated by U-Pb isotope dating of uranium ores from collapse breeeia pipes in the Grand Canyon region, northern Arizona. The Hack 2 and 3, Kanab North, and EZ 1 and 2 orebodies apparently formed in the interval of 200 + or - 20...
