Interstitial brines in playa sediments
B.F. Jones, A. S. Van Denburgh, A.H. Truesdell, S.L. Rettig
1969, Chemical Geology (4) 253-262
Study of several closed drainages in the Great Basin has shown that the interstitial solutions of shallow, fine-grained playa deposits store a large quantity of dissolved solids and are often more concentrated than associated lakes and ponds, except in peripheral zones of stream or ground-water inflow. These interstitial fluids,...
Determination of rhenium in molybdenite by X-ray fluorescence. A combined chemical-spectrometric technique
M.W. Solt, J.S. Wahlberg, A.T. Myers
1969, Talanta (16) 37-43
Rhenium in molybdenite is separated from molybdenum by distillation of rhenium heptoxide from a perchloric-sulphuric acid mixture. It is concentrated by precipitation of the sulphide and then determined by X-ray fluorescence. From 3 to 1000 μg of rhenium can be measured with a precision generally within...
Extraction of vanadium into isobutyl methyl ketone
Hans J. Crump-Wiesner, W.C. Purdy
1969, Talanta (16) 124-129
Because of its advantages in atomic-absorption spectroscopy, isobutyl methyl ketone was chosen as organic solvent for an extraction study on vanadium. Of eight chelating agents which were evaluated for completeness of extraction, ease of use, working pH range, and freedom from interference, cupferron was judged best.<div...
Saline water in southeastern New Mexico
W. L. Hiss, J.B. Peterson, T.R. Ramsey
1969, Chemical Geology (4) 341-360
Saline waters from formations of several geologic ages are being studied in a seven-county area in southeastern New Mexico and western Texas, where more than 30,000 oil and gas tests have been drilled in the past 40 years. This area of 7,500 sq. miles, which is stratigraphically complex, includes...
Computer-produced tables, maps, and diagrams as tools in the interpretation of brine data from southeastern Kansas (U.S.A.)
J.M. McNellis, C.O. Morgan, B.H. Lowell
1969, Chemical Geology (4) 303-324
The applicability of computer-oriented techniques to assist in the interpretation of brine data is demonstrated by the use of six programs on data from two example areas. These programs include a data tabling routine; routines for producing Stiff, Piper, and Ropes diagrams;...
Zircon ages of felsic volcanic rocks in the upper Precambrian of the Blue Ridge, Appalachian mountains
D.W. Rankin, T. W. Stern, J. C. Reed Jr., M. F. Newell
1969, Science (166) 741-744
Five zircon samples from Pennsylvania, Virginia, and North Carolina yield discordant uranium-lead ages which suggest an original age of 820 million years and an episodic lead loss at 240 million years. The indicated age of lead loss is interpreted as the age of movement of the Blue Ridge thrust sheet....
Dilemma posed by uranium-series dates on archaeologically significant bones from Valsequillo, Puebla, Mexico
Barney J. Szabo, H.E. Malde, C. Irwin-Williams
1969, Earth and Planetary Science Letters (6) 237-244
In an attempt to date stone artifacts of Early Man excavated from several sites at the Valsequillo Reservoir, a few kilometers south of Puebla, Mexico, Szabo applied the uranium-series method on bone samples known to be either from the same geologic formation as...
A purple-colored 1M mica clay from Silverton, Colorado
Pei-Lin Tien
1969, Clays and Clay Minerals (17) 245-249
A purple-colored clay of 1M mica polymorph in association with lead-zinc ore was collected from an abandoned mine dump near Silverton, Colorado. Electron micrographs show that the crystallites of the clay are less than 2µ in size and have poorly developed hexagonal outlines. Differential thermal and i.r. absorption analyses indicate...
A paleomagnetic study of secular variation in New Zealand
A. Cox
1969, Earth and Planetary Science Letters (6) 257-267
Ancient secular variation in New Zealand was determined from paleomagnetic measurements on 22 volcanic formations with ages of less than 0.68 m.y. The angular standard deviation from the field of an axial dipole is 13.2° with 95% confidence limits between 10.9° and 16.7°....
The morphology and chronology of a landslide near Dillon Dam, Dillon, Colorado
E.E. Wahlstrom, T. C. Nichols Jr.
1969, Engineering Geology (3) 149-174
Investigations were made of a landslide at the Dillon Dam site, Dillon, Colo., that included detailed laboratory and field analyses of the mineralogy, chemistry, and physical properties of landslide materials and the bedrock formations from which they were derived. These investigations provide an understanding of the relative importance of various...
Geochemistry of pore waters from Shell Oil Company drill holes on the continental slope of the northern Gulf of Mexico
F.T. Manheim, J. L. Bischoff
1969, Chemical Geology (4) 63-82
Pore waters were analyzed from 6 holes drilled from M.V. “Eureka” as a part of the Shell Oil Co. deeper offshore study. The holes were drilled in water depths of 600–3,000 ft. (approximately 180–550 m) and penetrated up to 1,000 ft. (300 m) of Pliocene-Recent clayey sediments. Salt and...
Geochemistry and origin of formation waters in the western Canada sedimentary basin-I. Stable isotopes of hydrogen and oxygen
B. Hitchon, I. Friedman
1969, Geochimica et Cosmochimica Acta (33) 1321-1349
Stable isotopes of hydrogen and oxygen, together with chemical analyses, were determined for 20 surface waters, 8 shallow potable formation waters, and 79 formation waters from oil fields and gas fields. The observed isotope ratios can be explained by mixing of surface water...
Paleozoic tectonic history of the Arctic basin north of Alaska
M. Churkin Jr.
1969, Science (165) 549-555
The geology of the margin of the Canada Basin, together with geophysical data, leads me to reject the continental subsidence theory for the origin of the deep Canada Basin. Instead, the Canada Basin is, I believe, a true and probably very ancient ocean basin floored by oceanic crust and rimmed...
Shock and thermal metamorphism of basalt by nuclear explosion, Nevada test site
O.B. James
1969, Science (166) 1615-1620
Olivine trachybasalt metamorphosed by nuclear explosion is classified into categories of progressive metamorphism: (i) Weak. Plagioclase is microfractured, and augite cotainis fine twin lamellae. (ii) Moderate. Plagioclase is converted to glass, and mafic minerals show intragranular deformation (undulatory extinction, twin lamellae, and, possibly, deformation lamellae), but rock texture is preserved....
Some triple-filament lead isotope ratio measurements and an absolute growth curve for single-stage leads
J. S. Stacey, M.E. Delevaux, T.J. Ulrych
1969, Earth and Planetary Science Letters (6) 15-25
Triple-filament analyses of three standard lead samples are used to calibrate a mass spectrometer in an absolute sense. The bias we measure is 0.0155 percent per mass unit, and the precision (for 95% confidence limits) is ±0.13% or less for all ratios relative to204Pb. Although its precision is not quite...
Beach lamination: Nature and origin
H.E. Clifton
1969, Marine Geology (7) 553-559
A distinctive two-fold sedimentation unit characterizes lamination in the upper swash zone of beaches. Within the unit a fine and/or a heavy mineral rich layer at the base grades upward into a coarser and/or a heavy mineral poor layer at the top. This...
Chemical composition of selected Kansas brines as an aid to interpreting change in water chemistry with depth
R.J. Dingman, E.E. Angino
1969, Chemical Geology (4) 325-339
Chemical analyses of approximately 1,881 samples of water from selected Kansas brines define the variations of water chemistry with depth and aquifer age. The most concentrated brines are found in the Permian rocks which occupy the intermediate section of the geologic column of this area. Salinity decreases below the...
U.S. Geological Survey standards-II. First compilation of data for the new U.S.G.S. rocks
F.J. Flanagan
1969, Geochimica et Cosmochimica Acta (33) 81-120
Rock analyses, determinations of major and minor constituents, and determinations of 57 trace elements reported by analysts throughout the world are presented for the new series of U.S. Geological Survey rock samples. Averages for both the constituents generally reported in a rock analysis...
On the global variations of terrestrial heat-flow
W.H.K. Lee
1969, Physics of the Earth and Planetary Interiors (2) 332-341
Over 3 500 measurements of surface heat-flux have been catalogued and analyzed to study the large-scale variations of terrestrial heat-flow. It was found that heat-flow values are correlated with major geologic provinces: higher averages and scattered values in active tectonic regions, and lower averages and more uniform values in stable...
Fractionation of gold in a differentiated tholeiitic dolerite
J.J. Rowe
1969, Chemical Geology (4) 421-427
Gold content was determined, by neutron-activation analysis, in samples from a drill core through the Great Lake sheet, Tasmania, a differentiated tholeiitic dolerite. The gold content of parts of the core seems to be related to the mafic index. The variation of...
Loss of uranium from crystallized silicic volcanic rocks
J.N. Rosholt, D. C. Noble
1969, Earth and Planetary Science Letters (6) 268-270
Dense primarily crystallized silicic groundmass material from two welded ash-flow units and one lava flow of Tertiary age from the Western United States contain only 20 to 60 percent of the uranium present in nonhydrated glass from the rock units. These differences reflect...
Equipment and techniques for low-altitude aerial sensing of water-vapor concentration and movement
R.L. Howell
1969, Remote Sensing of Environment (1) 13-18
Progress in the development of equipment and techniques for making rapid measurements of moisture movement through the atmosphere over a large area is described. Airborne sensing elements measure relative humidity, temperature, and air currents. These data are telemetered to a ground-based station...
Comparative ecology of pinyon mice and deer mice in Mesa Verde National Park, Colorado
Charles L. Douglas
Frank B. Cross, Philip S. Humphrey, J. Knox Jones Jr., editor(s)
1969, Book
No abstract available at this time...
Geologic map of the Paint Lick quadrangle, east-central Kentucky
Gordon Whitney Weir
1969, Geologic Quadrangle 800
No abstract available....
Geologic map of the Samuels quadrangle, north-central Kentucky
Roy Clark Kepferle
1969, Geologic Quadrangle 824
No abstract available....
