The compositionally zoned eruption of 1912 in the Valley of Ten Thousand Smokes, Katmai National Park, Alaska
W. Hildreth
1983, Journal of Volcanology and Geothermal Research (18) 1-56
On June 6–8, 1912, ∼ 15 km3 of magma erupted from the Novarupta caldera at the head of the Valley of Ten Thousand Smokes (VTTS), producing ∼ 20 km3 of air-fall tephra and 11–15 km3 of ash-flow tuff within ∼ 60 hours. Three discrete periods of ash-fall at Kodiak correlate, respectively, with Plinian...
Gas-film coefficients for streams
R. E. Rathbun, D. Y. Tai
1983, Journal of Environmental Engineering (109) 1111-1127
Equations for predicting the gas-film coefficient for the volatilization of organic solutes from streams are developed. The film coefficient is a function of windspeed and water temperature. The dependence of the coefficient on windspeed is determined from published information on the evaporation of water from a canal. The dependence of...
Helium isotopic variations in volcanic rocks from Loihi Seamount and the Island of Hawaii
M.D. Kurz, W.J. Jenkins, S.R. Hart, David Clague
1983, Earth and Planetary Science Letters (66) 388-406
Helium isotopic ratios ranging from 20 to 32 times the atmospheric 3He 4He(RA) have been observed in a suite of 15 basaltic glasses from the Loihi Seamount. These ratios, which are up to four times higher than those of MORB glasses and more than twice those of nearby Kilauea,...
Geoscience data management
T.M. Albert
1983, Computers & Geosciences (9) 3-6
[No abstract available]...
Rainfall intensity-duration-frequency formulas.
Chiu-Lan Chen
1983, Journal of Hydraulic Engineering (109) 1603-1621
A new general rainfall intensity-duration-frequency formula is presented, utilizing a method similar to, but more accurate than one previously developed. The previously developed formula was based on the average depth-duration ratio of about 40% and the mean depth-frequency ratio of 1.48. It is shown that this formula is only a...
Mineral resource potential map of the Carson-Iceberg Roadless Areas, central Sierra Nevada, California
William J. Keith, Maurice A. Chaffee, Donald Plouff, Michael S. Miller
1983, Miscellaneous Field Studies Map 1416-B
No abstract available....
LITHOLOGIC MAPPING USING LANDSAT THEMATIC MAPPER DATA.
M. H. Podwysocki, J.W. Salisbury, O. D. Jones, D.L. Mimms
1983, Conference Paper
The paper is in abstract form. It discusses the Landsat-4 Thematic Mapper (TM), with its new near infrared bands centered at 1. 65 mu m and 2. 20 mu m and spatial resolution of 30 m, which has been used to distinguish rocks containing minerals having ferric-iron absorption bands in...
Determination of elements in National Bureau of Standards' geological reference materials SRM 278 obsidian and SRM 688 basalt by inductively coupled argon plasma-atomic emission spectrometry
J.G. Crock, F.E. Lichte, Paul H. Briggs
1983, Geostandards Newsletter (7) 335-340
Two new geologic reference materials, issued by the National Bureau of Standards as standard reference materials, have been analyzed by a precise, accurate, and rapid method of analysis for their element content. The described procedure uses a multi‐acid, low temperature digestion in a closed teflon vessel, followed by the simultaneous...
Hydrothermal alteration of graywacke and basalt by 4 m NaCl
R.J. Rosenbauer, J. L. Bischoff, A. S. Radtke
1983, Economic Geology (78) 1701-1710
Separate experiments at 350 degrees C and 500 bars at a rock/fluid ratio of 1/10. Illite, dolomite, and quartz amounting to 67 percent of the original graywacke, were converted to albite and smectite. The rock gained Na and released Ca, K, heavy metals, and CO 2 to solution. In sharp contrast, the...
Use of multispectral scanner images for assessment of hydrothermal alteration in the Marysvale, Utah, mining area.
M. H. Podwysocki, D. B. Segal, M. J. Abrams
1983, Economic Geology (78) 675-687
Airborne multispectral scanner. A color composite image was constructed using the following spectral band ratios: 1.6/2.2 mu m, 1.6/0.48 mu m, and 0.67/1.0 mu m. The color ratio composite successfully distinguished most types of altered rocks from unaltered rocks; further division of altered rocks into ferric oxide-rich and -poor types....
Preliminary analysis of shuttle multispectral radiometer data for Southern Egypt
L. C. Rowan, Alexander F.H. Goetz, M.J. Kingston
1983, Advances in Space Research (3) 125-132
The Shuttle Multispectral Infrared Radiometer (SMIRR) is a spectroradiometer covering the region from 0.5 to 2.5 ??m in 10 channels that acquired data from spots 100 m in diameter along the subspacecraft ground track. It was flown aboard the second flight of the space shuttle Columbia, November 12-14, 1981. Data...
HIGH-TEMPERATURE GEOTHERMAL RESOURCES IN HYDROTHERMAL CONVECTION SYSTEMS IN THE UNITED STATES.
Manuel Nathenson
1983, Conference Paper, Electric Power Research Institute, Advanced Power Systems Division, (Report) EPRI AP
The calculation of high-temperature geothermal resources ( greater than 150 degree C) in the United States has been done by estimating the temperature, area, and thickness of each identified system. These data, along with a general model for recoverability of geothermal energy and a calculation that takes account of the...
Rb-Sr, Sm-Nd, K-Ca, O, and H isotopic study of Cretaceous-Tertiary boundary sediments, Caravaca, Spain: evidence for an oceanic impact site
D.J. DePaolo, F.T. Kyte, B.D. Marshall, J. R. O’Neil, J. Smit
1983, Earth and Planetary Science Letters (64) 356-373
Isotopic ratios and trace element abundances were measured on samples of Ir-enriched clay at the Cretaceous-Tertiary boundary, and in carbonate and marl from 5 cm below and 3 cm above the boundary. Samples were leached with acetic acid to remove carbonate, and with hydrochloric acid. Leachates and residues were measured....
Reply. Melanges and the Piney Branch complex - a metamorphosed fragment of the central Appalachian ophiolite in northern Virginia.
Avery A. Drake Jr., B. A. Morgan
1983, American Journal of Science (283) 376-381
Several points in the original paper are clarified. (Preceding abstract)-M.S....
Process and rate of dedolomitization: Mass transfer and C14 dating in a regional carbonate aquifer
W. Back, B.B. Hanshaw, Niel Plummer, P.H. Rahn, C.T. Rightmire, M. Rubin
1983, Geological Society of America Bulletin (94) 1415-1429
Regional dedolomitization is the major process that controls the chemical character of water in the Mississippian Pahasapa Limestone (Madison equivalent) surrounding the Black Hills, South Dakota and Wyoming. The process of dedolomitization consists of dolomite dissolution and concurrent precipitation of calcite; it is...
87Sr/86Sr ratios for basalt from Loihi Seamount, Hawaii
Marvin A. Lanphere
1983, Earth and Planetary Science Letters (66) 380-387
87Sr/86Sr ratios of 15 samples of basalt dredged from Loihi Seamount range from 0.70334 to 0.70368. The basalt types range from tholeiite to basanite in composition and can be divided into six groups on the basis of abundances of K2O, Na2O, Rb...
The isotopic and chemical evolution of Mount St. Helens
A. N. Halliday, A.E. Fallick, A.P. Dickin, A.B. Mackenzie, W.E. Stephens, W. Hildreth
1983, Earth and Planetary Science Letters (63) 241-256
Isotopic and major and trace element analysis of nine samples of eruptive products spanning the history of the Mt. St. Helens volcano suggest three different episodes; (1) 40,000–2500 years ago: eruptions of dacite with εNd = +5, εSr = −10, variable δ18O,206Pb/204Pb ∼ 18.76, Ca/Sr ∼...
Tangshan, six years later
R. E. Wallace
1983, Earthquake Information Bulletin (USGS) (15) 102-107
At 3:42 a.m on July 28, 1976, the now infamous Tangshan earthquake struck that heavily industrialized city in eastern China killing, by official count, 240,000 people. During the first 2 years after the earthquake, estimates of casualties ranged from 650,000 to 800,000. Almost certainly the exact number will never be...
Complexation of copper by aquatic humic substances from different environments
Diane M. McKnight, Gerald L. Feder, E. Michael Thurman, Robert L. Wershaw
1983, Science of the Total Environment (28) 65-76
The copper-complexing properties of aquatic humic substances isolated from eighteen different environments were characterized by potentiometric titration, using a cupric ion selective electrode. Potentiometric data were analyzed using FITEQL, a computer program for the determination of chemical equilibrium constants from experimental data. All the aquatic humic substances could be modelled...
Bioavailability of trace metals to aquatic organisms — A review
Samuel N. Luoma
1983, Science of Total Environment (28) 1-22
No abstract available....
Introduction; Seismology and earthquake engineering in Central and South America
A. F. Espinosa
1983, Earthquake Information Bulletin (USGS) (15) 4-6
Synthesis of geophysical data with space-acquired imagery: a review
David A. Hastings
1983, Advances in Space Research (3) 157-168
Geophysical data obtained from ground and airborne platforms have been used in the development of regional geologic models for many years. Space-acquired data and imagery have a shorter but similar history of applications. All these data may be synthesized either manually or digitally. Manual synthesis methods consist of overlaying and...
The magnetic field of the earth, 1980 magnetic total intensity
E. B. Fabiano, N.W. Peddie, A.K. Zunde
1983, IMAP 1461
No abstract available....
Chemistry and microbiology of a sewage spill in South San Francisco Bay
J. E. Cloern, R.S. Oremland
1983, Estuaries (6) 399-406
During three weeks of September 1979, the breakdown of a waste treatment plant resulted in the discharge of a large volume (1.5×107m3) of primary-treated sewage into a tributary of South San Francisco Bay, California. Chemical and microbial changes occurred within the tributary as decomposition and nitrification depleted dissolved oxygen. Associated...
Aeromagnetic map of the Kingman-Trona area, California
Water Resources Division, U.S. Geological Survey
1983, Open-File Report 83-663
No abstract available....
