Evolution of thought on ore controls in east Tennessee
Robert A. Laurence
1971, Economic Geology (66) 696-700
All early students of the zinc and barite deposits of East Tennessee, noting the geographic coincidence of the principal mining area with complex late Paleozoic geologic structure, concluded that (1) the ore-bearing breccias were produced by Appalachian tectonic forces and that (2) mineralizing solutions gained...
Tertiary limestone aquifer system in the southeastern states
H. E. LeGrand, V. T. Stringfield
1971, Economic Geology (66) 701-709
The hydrogeologic history of the Tertiary limestone system of the Southeastern States is reconstructed, especially as it relates to circulation of ground water and the development of solution cavities. The development of these solution cavities resembles in many respects the development of cavities in carbonates...
A geochemical hypothesis for dolomitization by ground water
B.B. Hanshaw, W. Back, R.G. Deike
1971, Economic Geology (66) 710-724
Most modern disordered dolomite has been found in dynamic environments. However, solutions associated with modern dolomite formation do not have a common Mg/Ca ratio; the ratio ranges from about 3 to 100. Ground-water circulation may have a significant role in formation of regional dolomites; one of the primary requirements for...
Evidence on the age mineralization in the of east of barite, zinc, and iron lower paleozoic rocks Tennessee
R.H. Carpenter, J.M. Fagan, H. Wedow Jr.
1971, Economic Geology (66) 792-798
Based on a study of minor occurrences of zinc, barite, and iron in East Tennessee, certain deposits are interpreted to have formed during early Middle Ordovician time. Principal lines of evidence supporting this age are: (1) the occurrence of barite, sphalerite, and pyrite associated with synsedimentary collapse breccias which span...
An early middle ordovician age for collapse breccias in the east Tennessee zinc districts as indicated by compaction and porosity features
W. T. Hill, H. Wedow Jr.
1971, Economic Geology (66) 725-734
The carbonate strata of the Lower Ordovician formations in the southern Appalachian Valley were probably considerably thicker, less compacted, and more porous and permeable in early Middle Ordovician time than they are now. Analysis of selected compaction features of rocks associated with the breccias of the East Tennessee zinc districts...
Models of mineralized solution-collapse structures from drilling statistics: An aid to exploration
H. Wedow Jr.
1971, Economic Geology (66) 770-776
Variations in thickness and metal content of selected stratigraphic units cut by drill holes in the East Tennessee zinc districts have been analyzed by regression techniques. Such analysis demonstrated that as the thickness of an underlying limestone unit is decreased chiefly by solution thinning, overlying fine-grained dolomite units increase in...
Problems on the origin of ore deposits in the lower Ordovician formations of east Tennessee
W. T. Hill, J. E. McCormick, Helmuth Wedow Jr.
1971, Economic Geology (66) 799-804
Most recent workers in the East Tennessee zinc and barite districts are in general agreement that the host breccias were formed by solution-collapse processes in early Middle Ordovician time, probably in an ancient carbonate aquifer system of regional extent. There is little agreement, however, on...
Fluid-inclusion evidence on the environment of formation of mineral deposits of the southern Appalachian valley
Edwin Roedder
1971, Economic Geology (66) 777-791
Approximately 1,330 fluid inclusions were studied in samples of ore and gangue minerals from both massive ore and late-stage vugs from a series of Appalachian deposits and five active mines in the East Tennessee zinc districts. Most primary inclusions in sphalerite, fluorite, dolomite, and quartz...
Sea level as affected by river runoff, eastern United States
R.H. Meade, K.O. Emery
1971, Science (173) 425-428
Variations in annual river inflow account for 7 to 21 percent of the total variation in average annual sea level along the Atlantic and Gulf of Mexico coasts of the United States. This compares with 29 to 68 percent of the total variation that can be attributed to the secular...
Eggshell thickness in mourning dove populations
J.F. Kreitzer
1971, Journal of Wildlife Management (35) 563-564
Eggs (n = 452) of the mourning dove (Zenaidura macroura) were collected from 9 states in 1969 and 11 states in 1970, and shell thickness was compared with that of eggs (n = 97) collected from 24 states during the years 1861 to 1935. Mean shell thickness did not differ...
Disappearance and persistence of aldrin after five annual applications
L.J. Korschgen
1971, Journal of Wildlife Management (35) 494-500
Investigation was initiated in 1965 to ascertain the disappearance rate of aldrin applied on loam soils at the recommended level of 1.5 lb per acre from 1960 through 1964. There was no further application of pesticides. Sampling began in 1965 and extended into 1970. Data from gas chromatographic analyses of...
Potassium-argon Ages from the Pololu Volcanic Series, Kohala Volcano, Hawaii
G. Brent Dalrymple
1971, Bulletin of the Geological Society of America (82) 1997-2000
Potassium-argon ages on five lava flows from the Pololu Volcanic Series, thought to be among the oldest rocks exposed on the island of Hawaii, indicate that the main subaerial shield-building phase of Kohala Volcano occurred about 0.7 ± 0.15 m.y. ago and that most of...
Contrasting behavior of P, Ti, and Nb in a differentiated high-alumina olivine tholeiite and a calc-alkaline andesitic suite
A. T. Anderson, David Gottfried
1971, Bulletin of the Geological Society of America (82) 1929-1941
Crystallization differentiation in a low-K2O, high-Al2O3 olivine tholeiite (Hat Creek, California) yields segregation veins of basaltic andesite composition, and residual, interstitial glasses of dacite and rhyolite composition. P, Ti, and probably Nb, are progressively enriched in segregation veins and residual dacitic glass by crystallization of olivine, plagioclase, augite, and magnetite. P...
Origin of ridge-top depressions by large-scale creep in the Olympic Mountains, Washington
Rowland W. Tabor
1971, Bulletin of the Geological Society of America (82) 1811-1822
In the high mountain area of the Olympic Mountains, Washington, there are many troughlike depressions on and essentially parallel to ridge tops. The troughs are mostly developed on rocks with strong planar anisotropy: slate, sandstone, and phyllite. Similar features in Europe, Japan, and New Zealand...
Evaluating the effects of discharge rates, water levels, and peaking on fish populations in Missouri River main stem impoundments
Norman Gustaf Benson
William C. Ackermann, Gilbert F. White, E.B. Worthington, J. Loreena Ivens, editor(s)
1971, Conference Paper, International Symposium on Man-Made Lakes, Their Problems, and Environmental Effects
No abstract available....
Fractionation of minor elements between galena and sphalerite, Darwin lead-silver-zinc mine, Inyo County, California and its significance in geothermometry
Wayne E. Hall, Harry J. Rose Jr., Frederick Otto Simon
1971, Economic Geology (66) 602-606
Minor element abundances were determined for galena and sphalerite from the Darwin mine, Inyo County, California. The temperature of deposition was calculated from the distribution coefficients determined experimentally by Bethke and Barton (1971) for cadmium and manganese in coexisting galena and sphalerite. The fractionation of...
Comments on the role of oxygen fugacity in the formation of immiscible sulfide liquids in the H chromitite zone of the Stillwater complex, Montana
Norman J. Page
1971, Economic Geology (66) 607-610
No abstract available....
The influence of pH on the efficacy and residues of quinaldine
J.B. Sills, J. L. Allen
1971, Transactions of the American Fisheries Society (100) 544-545
Quinaldine, an anesthetic for fish, loses its effectiveness in solutions having pH values less than 6. Measured quantities of un‐ionized quinaldine in solution compared favorably with calculated values at selected pHˈs. Quinaldine residues in largemouth bass (Micropterus salmoides) anesthetized at various pHˈs verify that only the un‐ionized portion in solution...
Geochemistry of water
O.P. Bricker
1971, Eos, Transactions, American Geophysical Union (52) IUGG302-IUGG305
The quadrennium 1967–1970 has been a productive period in the field of water geochemistry. Field studies, laboratory investigations, and theoretical considerations have led to significant advances in our knowledge of the chemical behavior of natural waters and of the solid earth materials that contain them. A symposium on trace inorganics...
Changes in mineral composition of eggshells from black ducks and mallards fed DDE in the diet
J. R. Longcore, F. B. Samson, J.F. Kreitzer, J. W. Spann
1971, Bulletin of Environmental Contamination and Toxicology (6) 345-350
No abstract available....
Hazards of mercury: Special report to the secretary's pesticide advisory committee, department of health, education, and welfare, November 1970
Norton Nelson, Theodore C. Byerly, Albert C. Kolbye Jr., Leonard T. Kurland, Raymond E. Shapiro, Samuel L. Shibko, William H. Stickel, Jack E. Thompson, Lowell A. Van Den Berg, Alfred Weissler
1971, Environmental Research (4) 1-69
No abstract available....
Volcanology, geochemistry, and petrology: U.S. National Report, 1967-1971, Fifteenth General Assembly, IUGG: Investigations at active volcanoes
Thomas L. Wright
1971, Eos, Earth and Space Science News (52) 57-62
The field of volcanology has expanded greatly in the years 1967–1970, and work on active volcanoes has kept pace with this expansion. I have restricted this summary and the accompanying bibliography to studies by U.S.‐based investigators of active or...
Obsidian hydration dating applied to dating of basaltic volcanic activity
I. Friedman, N. Peterson
1971, Science (172) 1028-1028
Basalt flows and bombs that contain remelted rhyolite glass can be dated by obsidian hydration dating....
Boulder Creek batholith, Colorado part II: Isotopic age of emplacement and morphology of zircon
Thomas W. Stern, George Phair, Marcia F. Newell
1971, Bulletin of the Geological Society of America (82) 1615-1633
Zircon separated from six rocks whose compositions spanned the range of differentiation in the Boulder Creek batholith yielded a “discordia” age of emplacement of 1725 m.y., close to the average PB207/Pb206 age 1720 m.y.) and indicating that the constituent rocks are cogenetic within approximately ± 20 m.y. Statistical studies show that...
Quaternary faulting in the eastern Alaska Range
D.H. Richter, N.A. Matson Jr.
1971, Bulletin of the Geological Society of America (82) 1529-1540
Quaternary faulting is well displayed along the Denali fault system and the recently recognized and related Totschunda fault system in the eastern Alaska Range. The principal movement on both fault systems is right-lateral strike-slip. Offset glacial features of Wisconsin age indicate minimum Holocene slip rates of 1.1 to 3.5 cm...
