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Contents
Purpose of the investigation
Acknowledgments
Previous geophysical investigations in the Tri-State area
Location of the area
Topography
Zinc and lead production in the Tri-State district
General geologic setting
Method of selecting areas for geophysical investigations
Geologic description of the areas studied in geophysical investigations
Neutral area
Mullen area
Jarrett area
Walton area
Karcher area
Swalley area
Greenback area
McBee-Martin area
Instruments, field procedure, and presentation of data
Introduction
Instruments
Field procedure
Correction of field measurements
Temperature corrections
Diurnal corrections
Latitude and longitude corrections
Datum correction
Accuracy of data
Presentation of data
Instruments
Field procedure
Computation and correction of field measurements
Calibration of the instrument
Elevation correction
Latitude correction
Regional gradient
Accuracy of data
Presentation of data
Instruments
Field procedure
Computation and correction of field measurements
Accuracy of data
Presentation of data
Instruments and measurement technique
Field procedure
Computation of field measurements
Factors influencing interpretation
Presentation of data
Instruments and equipment
Field procedure
Computation and correction of field measurements
Accuracy of data
Presentation of data
Instruments and procedure
Discussion of elements
Relation between spectral intensity and sample composition
Accuracy of data
Sources of analytical error
Errors due to variations in arcing conditions
Errors due to variations in visual determination of spectral intensity
Errors due to impurities in the electrodes
Errors due to interfering lines
Errors due to contamination of samples
Errors due to sampling
Errors due to variations in method of developing spectrograms
Errors due to variations in exposure time
Validity of readings
Validity of soil analyses
Mullen area
Walton area
Karcher area
Swalley area
Greenback area
Validity of Cherokee shale analyses
Validity of Mississippian limestone analyses
Presentation of data
Geological basis for geophysical interpretations
Magnetic anomalies
Gravity anomalies
Natural potential anomalies
Resistivity anomalies
Geothermal anomalies
Geochemical anomalies
Geophysical interpretations and geological correlations
Geological correlations in different areas
Magnetic survey
Gravity survey
Comparison and correlation of magnetic and gravity results
Geochemical survey
Shale samples
Limestone samples
Shale and limestone samples
Magnetic survey
Gravity survey
Natural potential survey
Resistivity survey
Profile
Depth stations
Geothermal survey
Geochemical survey
Conclusions
Magnetic survey
Gravity survey
Natural potential survey
Resistivity survey
Profiles
Depth stations
Geothermal survey
Geochemical survey
Magnetic survey
Gravity survey
Natural potential survey
Resistivity survey
Profiles
Depth stations
Geothermal survey
Geochemical survey
Summary
Magnetic survey
Gravity survey
Natural potential survey
Resistivity survey
Profiles
Depth stations
Geothermal survey
Geochemical survey
Summary
Gravity survey
Resistivity survey
Geochemical survey
Gravity survey
Resistivity survey
Geothermal survey
Geochemical survey
Results of gravity, resistivity, and temperature measurements
Summary and coordination of geophysical results
Factors influencing interpretations
Regional magnetic and gravity investigations
Investigations in local areas
Magnetic survey
Gravity survey
Natural potential survey
Resistivity survey
Geothermal survey
Geochemical survey
Conclusions
Evaluation of geophysical prospecting as an aid to ore exploration in the Tri-State district
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Kansas Geological Survey, Geology
Placed on web Oct. 29, 2018; originally published December, 1942.
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The URL for this page is http://www.kgs.ku.edu/Publications/Bulletins/44/01_contents.html