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Hydrothermal minerology of research drill hole Y-3, Yellowstone National Park, Wyoming Hydrothermal minerology of research drill hole Y-3, Yellowstone National Park, Wyoming

The approximate paragenetic sequence of hydrothermal minerals in the Y-3 U. S. Geological Survey research diamond-drill hole in Lower Geyser Basin, Yellowstone National Park, Wyoming, is: hydrothermal chalcedony, hematite, pyrite, quartz, clay minerals (smectite and mixed-layer illite-smectite), calcite, chlorite, fluorite, pyrite, quartz, zeolite minerals (analcime, dachiardite...
Authors
Keith E. Bargar, Melvin H. Beeson

INTERPRETATION OF THERMAL-INFRARED MULTISPECTRAL SCANNER IMAGES OF THE OSGOOD MOUNTAINS, NEVADA. INTERPRETATION OF THERMAL-INFRARED MULTISPECTRAL SCANNER IMAGES OF THE OSGOOD MOUNTAINS, NEVADA.

Data from the Thermal-Infrared Multispectral Scanner (TIMS) were collected over the Osgood Mountains in northern Nevada midmorning on 27 August 1983. The area includes gold-producing properties of the Getchell Mine, the Prinson Mine, and a prospect being developed near Preble, Nevada. Tungsten-bearing tactite deposits, barite deposits, and some minor lead-zinc deposits are also present...
Authors
M. Dennis Krohn

JOINT DEVELOPMENT OF A NATIONAL 1:100,000-SCALE DIGITAL CARTOGRAPHIC DATA BASE. JOINT DEVELOPMENT OF A NATIONAL 1:100,000-SCALE DIGITAL CARTOGRAPHIC DATA BASE.

The U. S. Geological Survey is beginning a major new program to create a nationwide digital cartographic data base from 1:100,000-scale maps by the end of the decade. This data base will supplement the currently available 1:2,000,000-scale national data base and the selected coverage at 1:24,000-scale. It is anticipated that the data will be useful for both the production of custom...
Authors
George M. Callahan, Frederick R. Broome

KONOCTI BAY FAULT ZONE, LAKE COUNTY, CALIFORNIA: A REEVALUATION. KONOCTI BAY FAULT ZONE, LAKE COUNTY, CALIFORNIA: A REEVALUATION.

The Konocti Bay Fault Zone (KBFZ), initially regarded by some as a promising liquid-dominated hydrothermal system, has been a disappointment as a geothermal prospect. Five exploratory wells have been drilled in the vicinity of the KBFZ, but none of them are producing thermal fluids; in fact, three have been abandoned. This may be because hydrothermal fluid discharges along the KBFZ are...
Authors
J. Michael Thompson

LANDSAT M. S. S. IMAGE MOSAIC OF TUNISIA. LANDSAT M. S. S. IMAGE MOSAIC OF TUNISIA.

The Landsat mosaic of Tunisia funded by USAID for the Remote Sensing Laboratory, Soils Division, Ministry of Agriculture, Tunisia, was completed by the USGS in September 1983. It is a mixed mosaic associating digital corrections and enhancements to manual mosaicking and corresponding to the Tunisian request for high resolution and the limited available funds. The scenes were processed by...
Authors
J. C. Boswell-Thomas

LINEAR MODELS FOR MANAGING SOURCES OF GROUNDWATER POLLUTION. LINEAR MODELS FOR MANAGING SOURCES OF GROUNDWATER POLLUTION.

Mathematical models for the problem of maintaining a specified groundwater quality while permitting solute waste disposal at various facilities distributed over space are discussed. The pollutants are assumed to be chemically inert and their concentrations in the groundwater are governed by linear equations for advection and diffusion. The aim is to determine a disposal policy which...
Authors
Steven M. Gorelick, Sven-Ake Gustafson
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