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Robert J. Bisdorf

Publications and source records attributed to Robert J. Bisdorf.

At least 37 records · Page 2Linked to original sources
USGS1985

Electrical Techniques for Engineering Applications

Surface electrical geophysical methods have been used in such engineering applications as locating and delineating shallow gravel deposits, depth to bedrock, faults, clay zones, and other geological phenomena. Other engineering applications include determining water quality, tracing ground water contaminant plumes and locating dam seepages. Various methods and electrode arrays are employed to solve particular geological problems. The sensitivity of a particular method or electrode array depends upon the physics on which the method is based, the array geometry, the electrical contrast between the target and host materials, and the depth to the target. Each of the available electrical methods has its own particular advantages and applications which the paper discusses.

Bulletin of the Association of Engineering Geologi↗
USGS1985

SCHLUMBERGER SOUNDING RESULTS OVER THE NEWBERRY VOLCANO AREA, OREGON.

Schlumberger soundings were made in the Newberry volcano area of Oregon to categorize the electrical properties of possible Cascade geothermal systems. An east-west geoelectric cross section constructed from the interpreted soundings shows a low-resistivity zone in the caldera, that corresponds to the increase in thermal gradient observed in a U. S. Geological Survey test well. Another low resistivity zone about 600 m deep is present just to the west of the caldera boundary. A north-south geoelectric cross section shows the configuration of the western low-resistivity zone. Maps of interpreted resistivity at depths of 750 and 1000 m show that the main low resistivity area west of the caldera has two tongues, one oriented easterly and the other oriented southerly.

Conference Paper↗
USGS1980

Schlumberger soundings in the Fish Springs Flat area, Juab County, Utah

In 1978 the U. S. Geological Survey made 43 Schlumberger soundings in the Fish Springs Flat area, Juab County, Utah. The purpose of this survey was to delineate water quality and obtain structural information. Fish Springs Flat consists mainly of Quaternery deposits of sand, gravel, clay, and silt. On the west Fish Springs Flat is bordered by the Fish Springs Range which is composed primarily of Paleozoic limestone. With the exception of a short section of metal fence and concrete culverts, disruptive cultural features did not appear to be present. The purpose of this report is to release the field data obtained in this survey. In addition the automatic inversion of the sounding curves, computer-generated geoelectric cross sections, and interpreted resistivity maps are also given and briefly described.

Utah↗
USGS1976

Schlumberger soundings near Fallon, Nevada

In 1976, the U.S. Geological Survey, in cooperation with the Nevada Division of Water Resources, made thirty one Schlumberger resistivity soundings near the city of Fallon, Nevada. The survey was made to estimate and delineate the volume of fill containing fresh ground water and to map the lateral extent and thickness of basalt layers which act as the principle aquifer in the area.

Nevada↗