"A vertical intensity magnetic survey of 144 square miles in Christian County, southwest Missouri revealed an 825 gamma anomaly having a closure of 9 square miles. A three mile gravity traverse across the magnetic anomaly detected a positive gravity anomaly in excess of six mllligals.
Calculations showed that a Precambrian hill large enough to cause the observed magnetic anomaly would outcrop at the surface. Because Precambrian rocks are known to be buried under a sedimentary layer, this hypothesis was rejected.
Theoretical anomalies of several geometrical bodies at calculated depths were visually compared with the measured magnetic and gravity profiles. A peridotite plug, depth 4,000 feet, vertical thickness 14,000 feet, cross-sectional radius 4,200 feet; a diabase plug of the same dimensions with heavy non-magnetic sulfide minerals present; and a diabase plug, depth 2,400 feet, vertical thickness 15,600 feet, cross- sectional radius 4,800 feet produced the necessary theoretical anomalies.
On the basis of present geophysical and geological evidence, the structure is not of economic importance"--Abstract, page ii.
Rupert, Gerald B., 1930-2016
Zenor, Hughes M., 1908-2001
Maxwell, James C.
Clark, George Bromley, 1912-
Mining and Nuclear Engineering
M.S. in Mining Engineering
Missouri School of Mines and Metallurgy
viii, 66 pages
Christian County, Missouri
© 1961 Edwin J. Ballantyne, All rights reserved.
Thesis - Open Access
Library of Congress Subject Headings
Geophysics -- Missouri -- Christian County
Geology, Stratigraphic -- Precambrian
Peridotite -- Missouri -- Christian County
Print OCLC #
Electronic OCLC #
Link to Catalog Record
Ballantyne, Edwin J. Jr., "A geophysical investigation of an area in Christian County, Missouri" (1961). Masters Theses. 4171.
Magnetic Map Showing Location of Mines and Prospects, Christian County, Missouri
Ballantyne-Edwin-1961-Plate-II.tif (33386 kB)
United States Geological Survey Topographic Map of the Ozark Quadrangle
Ballantyne-Edwin-1961-Plate-III.tif (32350 kB)
United States Geological Survey Topographic Map of the Fordland Quadrangle
Ballantyne-Edwin-1961-Plate-IV.tif (34131 kB)
United States Geological Survey Topographic Map of the Selmore Quadrangle
Ballantyne-Edwin-1961-Plate-V.tif (33639 kB)
United States Geological Survey Topographic Map of the Chadwick Quadrangle
Ballantyne-Edwin-1961-Plate-VI.tif (33430 kB)
United States Geological Survey Topographic Map of the Bradleyville Quadrangle