Effects of laboratory treatments on silver and other elements in native gold
W. L. Campbell, E. L. Mosier, J.C. Antweiler
1973, Journal of Research of the U.S. Geological Survey (1) 211-220
Interpretation of the element content of gold and of alloy proportions of gold and silver may have useful applications in prospecting and ore genesis studies. The commonly used methods of concentration and recovery of gold for analysis (acid leach, roasting, or amalgamation), however, alter the content of silver and other...
Pen-reared fulvous tree ducks used in movement studies of wild populations
Edward L. Flickinger, Kirk A. King, O. Heyland
1973, Journal of Wildlife Management (37) 171-175
To obtain movement data on wild fulvous tree ducks (Dendrocygna bicolor) 165 immature pen-reared fulvous tree ducks were color-marked and released in three southeast Texas counties in July October 1969/70. Nine (5 percent) of the marked birds were recovered from 3 days to 9 months after release, and an additional...
High survival and homing rate of hand-reared wild-strain mallards
F.B. Lee, A.D. Kruse
1973, Journal of Wildlife Management (37) 154-159
In the summer of 1970, 648 (329 males and 319 females) hand-reared wild-strain mallards (Anas platyrhynchos) were banded and released at the Arrowwood National Wildlife Refuge, Edmunds, North Dakota. The females were also marked with numbered nasal saddles. Liberation was by the gentle release method, and no special effort was...
Kilauea Volcano, Hawaii: A search for the volcanomagnetic effect
P.M. Davis, D. B. Jackson, J. Field, F.D. Stacey
1973, Science (180) 73-74
Brief excursions of magnetic field differences between a base station and two satellite station magnetometers show only slight correlation with ground tilt at Kilauea Volcano. This result suggests that only transient, localized stresses occur during prolonged periods of deformation and that the volcano can support no large-scale pattern of shear...
Ground water in Santa Barbara and southern San Luis Obispo counties, California
James W. Warner
1973, Report
No abstract available....
Compositions of biotites from unaltered and altered monzonitic rocks in the Bingham Mining District, Utah
William J. Moore, Gerald K. Czamanske
1973, Economic Geology (68) 269-274
No abstract available....
A comparison of three methods of determining geomagnetic paleointensities
Robert S. Coe, C. Sherman Gromme
1973, Journal of Geomagnetism & Geoelectricity (25) 415-435
Paleointensity studies by the methods of the Thelliers, Wilson, and van Zijl were compared for adjacent specimens from each of five basaltic lava flows. For three of the flows, the actual paleointensity is independently known within ±6%. All specimens had Curie temperatures above 500°C, and those from four of the...
Potassium-argon ages and paleomagnetism of the Waianae and Koolau Volcanic Series, Oahu, Hawaii
Richard R. Doell, G. Brent Dalrymple
1973, Geological Society of America Bulletin (84) 1217-1241
Paleomagnetic and potassium-argon measurements on 786 oriented cores from 99 volcanic units at 18 sites in the Waianae and Koolau Ranges, Oahu, when combined with data from previous studies, show that the sub-aerial Waianae Volcano was active only from about 3.6 to 2.4 m.y. ago and the subaerial Koolau Volcano...
Submarine chert-argillite slide-breccia of Paleozoic age in the southern Klamath Mountains, California
Dennis P. Cox, Walden P. Pratt
1973, Geological Society of America Bulletin (84) 1423-1438
A unique chert-argillite breccia—a breccia with an argillite matrix, in which nearly all the fragments are chert—underlies an area of at least 60 sq mi in the southern Klamath Mountains of California. Rocks of this composition have not been reported previously, in the Klamath Mountains or elsewhere, but in northwestern...
Oil shale formed in desert environment: Green River Formation, Wyoming
W. H. Bradley
1973, GSA Bulletin (84) 1121-1123
The oil shale beds of the Wilkins Peak Member of the Green River Formation differ from most of the Green River oil shale of Colorado and Utah because very few of them have varves; they have numerous mud cracks and, locally, desiccation breccias. Many have...
Salmonellosis in passerine birds in Maryland and West Virginia
L. N. Locke, R.B. Shillinger, T. Jareed
1973, Journal of Wildlife Diseases (9) 144-145
Salmonella typhimurium was responsible for a die-off of evening grosbeaks (Hesperiphona vespertina) at Elkins, West Virginia, and was isolated from a pine siskin (Spinus pinus) collected at the site of a die-off near Baltimore, Maryland....
Photogeology of the dark material in the Taurus-Littrow region of the moon
Baerbel K. Lucchitta
1973, Conference Paper, Proceedings, 4th Lunar Science Conference
Regional relations and characteristics of the dark material as observed on photographs of the Taurus-Littrow region of the moon are reviewed to provide a background for interpretations of its nature and origin. The dark material seems to be a surficial deposit that covers mare and highland areas near the southeastern...
Fluid-inclusion studies of the fluorspar and gold deposits, Jamestown district, Colorado
J. Thomas Nash, C. G. Cunningham
1973, Economic Geology (68) 1247-1262
The Jamestown district, Boulder County, Colorado, is a major producer of fluorspar; prior to 1940, gold, gold-telluride, and lead-silver ores were mined. Fluorite occurs as a primary mineral in phases of the composite sodic granite stock at Jamestown and in breccia zones, stockworks, and pipe-shaped bodies in and adjacent to...
Geochemical studies in the Park City district; I, ore fluids in the Mayflower mine
J. Thomas Nash
1973, Economic Geology (68) 34-51
Ore bodies in the Mayflower mine, Park City district, Utah, are localized along a normal fault zone which cuts Mississippian sedimentary and Tertiary intrusive rocks. Fissure filling and replacement Pb-Zn-Cu-Ag-Au mineralization occurs in both sedimentary and intrusive host rocks over a known vertical distance of 3,000 feet. The paragenesis of...
Basement ages and basement depths in the eastern equatorial pacific from Deep Sea Drilling Project Legs 5, 8, 9, and 16
T. H. Van Andel, David Bukry
1973, GSA Bulletin (84) 2361-2379
Recent literature contains numerous references to basement ages and basement depths determined by the Deep Sea Drilling Project. The data are derived from a variety of sources, many of them inadequately documented or preliminary, and are not uncommonly inaccurate or conflicting. In this paper we present tabulations of basement ages...
Stages in the P-T path of ascending basalt magma: an example from San Quintin, Baja California
Charles R. Bacon
1973, Contributions to Mineralogy and Petrology (41) 1-22
Late Pleistocene or Recent lavas from San Quintin, Baja California are basanitoids and alkali basalts. The surface quench temperatures of the lavas average 1 005° C with log fO2">f<span id="MathJax-Span-7"...
Evidence for Quaternary movement on the McKinley strand of the Denali fault in the Delta River area, Alaska
J. H. Stout, J.B. Brady, F. Weber, R.A. Page
1973, Geological Society of America Bulletin (84) 939-948
Offset Holocene alluvial fans and drainages along the McKinley strand of the Denali fault near the Delta River in the east-central Alaska Range indicate as much as 50 to 60 m of right-lateral displacement during the last 10,000 yrs. Vertical movement of 6 to 10 m during the same time...
Lead isotope systematics and uranium depletion in the Granite Mountains, Wyoming
J. N. Rosholt, R. E. Zartman, Ignatius T. Nkomo
1973, Geological Society of America Bulletin (84) 989-1002
Isotopic composition and concentration of lead in whole rock and microcline and concentration of uranium and thorium in whole-rock samples of granite from the Granite Mountains, Wyoming, have been determined. The lead isotopic composition in the whole rocks was found to be highly radiogenic with a range in Pb206/Pb204 of 19.58...
Earthquakes near Mount St. Helens, Washington
J. D. Unger, Kay F. Mills
1973, Geological Society of America Bulletin (84) 1065-1067
Seismic monitoring around Mount St. Helens, Washington, for 28 days during the summer of 1970 showed that the frequency of local earthquakes was from 3 to 13 per day and very similar to the activity previously observed near Mount Rainier, Washington. The epicenters of the well-recorded earthquakes form a roughly...
Change in potentiometric head in the Lloyd Aquifer, Long Island, N.Y
G.E. Kimmel
1973, Journal of Research of the U.S. Geological Survey (1) 345-350
The potentiometric surface of the Lloyd aquifer in 1970 locally was as much as 40 feet lower than in 1900. During this period, withdrawal of water from wells was estimated to exceed 300 billion gallons, and the amount of water released from aquifer storage by compressive forces was estimated to be 1.6 billion gallons...
Concepts of karst development in relation to interpretation of surface runoff
H. E. LeGrand, V. T. Stringfield
1973, Journal of Research of the U.S. Geological Survey (1) 351-360
Some unusual characteristics of streamflow occur in regions underlain by carbonate rocks. The streamflow characteristics are related to processes of karstification, these processes being dependent on circulation of subsurface water and solution of the rock to form characteristic topography and underground cavern systems. Very highly cavernous and permeable unsaturated zones tend to keep the water...
Photoimages for map bases
Morris L. McKenzie
1973, Journal of Research of the U.S. Geological Survey (1) 327-339
Maps with aerial photograph image bases have gained wide popularity. The orthophotomap presents an abundance of ground detail and information that cannot be shown on a line map with standard cartographic symbols. In preparing a map base covering areas of little relief, the imagery is fitted to map control with a conventional rectifier, but for...
A photogeologic method for determining the direction of horizontal dilation from patterns of en echelon fracturing
Wendell A. Duffield, K. Nakamura
1973, Journal of Research of the U.S. Geological Survey (1) 283-287
The direction of horizontal dilation in areas characterized by tensional tectonics can be determined from a statistical study of en echelon patterns of fracturing observed on aerial photographs. Relative, to a north-south dilation, nearly all directions of zones of dextral (right-lateral) en echelon fractures lie in the northeast quadrant, while those of sinistral (left-lateral) en...
Hydraulic sand-model studies of miscible-fluid flow
J.M. Cahill
1973, Journal of Research of the U.S. Geological Survey (1) 243-250
Hydraulic sand models are useful physical tools in the investigation of the transition zone that occurs between salt and fresh ground water in coastal aquifers. Such models are used to demonstrate the effects of transport mechanisms that influence the dynamic behavior and the shape of the transition zone. The techniques employed in obtaining in-place measurements...
Can satellite photography contribute to topographic mapping?
Frederick J. Doyle
1973, Journal of Research of the U.S. Geological Survey (1) 315-325
Photographs taken on early space missions, in the Gemini-Apollo series, demonstrated the usefulness of the long view for cartography despite acknowledged shortcomings. Later developments, such as ERTS and Skylab, will provide far more data about Earth, but mostly in planimetric form. The third dimension, height, which makes the map representation topographic, is not easy to...
