MAGNETIC METHODS 



165 



TYPICAL SULPHIDE MINERALS 

 Arsenopyrite 

 Chalcopyrite 



Chromite Y 0.000005 to 0.0002 



Markasite 

 Pyrite 



DIAMAGNETIC MINERALS AND ROCKS 

 Anhydrite and Gypsum -0.000001 1 to -0.00001 

 Quartz -0.000001 1 to -0.0000012 



Sylvite -0.0000009 to -0.000001 1 



Calcite -0.0000006 to -0.0000010 



Rock salt -0.0000004 to -0.0000013 



Many samples 



1 or more samples 

 1 or more samples 

 1 or more samples 

 1 or more samples 

 1 or more samples 



bee Equations 18 and 19 for the relationship between susceptibility and permeability. 

 **References for table of magnetic susceptibilities: 



a. L. B. Slichter, A.I.M.E. Geophysical Volume, 1929, p. 242. 



b. Ibid, G.S.A. Special Paper No. 36, 1942, p. 295. 



c. N. H. Stearn, A.I.M.E. Geophysical Volume, 1929, p. 343. 



d. Ambronn and Cobb, Geophysics, McGraw-Hill, 1928, p. 94. 



e. L. B. Slichter, ibid., p. 343. 



f. C. A. Heiland, Geophysical E.vploration, Prentice-Hall, 1940, pp. 310-314. 



