BULLETIN OF tHE GEOLOGICAL SOCIETY OF AMERICA 

 Vol. 19, pp. 501-512 January 6, 1908 



MINE WATEES AND THEIE FIELD ASSAY^ 



BY ALFRED C. LANE 



{Bead before the Society December 30, 1907) 



CONTENTS 



Page 



Introduction 501 



Different sources of mine waters 502 



Classiiication of waters 502 



Occurrence of connate waters 503 



Cementation a check to circulation 505 



Chemical character of underground waters 505 



Rain or pluvial waters 505 



Chlorine characteristic of sea water 506 



Importance of studying chemical character 508 



Field tests of mine waters 509 



Concentration 509 



Determination of total solids 509 



Specific gravity 509 



Electrical resistance 509 



Total retlectometer 509 



Tablet methods 510 



U. S. Geological Survey method 510 



Chlorine 510 



Carbonates 511 



Hardness 511 



In general 511 



Turbidity methods 511 



Chlorine 511 



Calcium 511 



Magnesium 512 



Sulphates 512 



Sulphur 512 



Colorimetric methods 512 



Introduction 



No one has done more than he who presides over the Geological Society 

 this year^ to emphasize the work of water in the deposition of ore and in 

 the metamorphism or change of rocks as they pass down through the two 

 zones of katamorphism, that of leaching or weathering and then that of 



^ Manuscript received by the Secretary of the Society March 5, 1908. 

 * C. E. Van Hise : Theory of metamorphism. 



XLVI — Bull. Geol. Boc. Am,. Vol. 19, 1907 (501) 



