504 



A. C. LANE MINE "WATERS AND THEIR FIELD ASSAY 



sjrnclines may be so. We encounter, for instance, around the Lake Superior 

 basin, beginning from 600 feet to 1,600 feet down, a water quite strong 

 in calcium chloride (analj^sis number 1), which must mark the stop- 

 page of the relatively active circulation of the pluvial or vadose waters of 

 the first thousand feet or so. The chloride water has, to be sure, more 

 sodium chloride in proportion to calcium chloride when first struck than 

 at greater depths, and this may be due to intermingling with upper waters 

 containing carbonates, which have precipitated the calcium as carbonate 

 (analysis number 2). These waters occur, however, not only in the Ke- 

 weenawan rocks, but in the Huronian, and come in at about the depths 

 given by Knch and Kemp,^ to wit, 300 to 450 respectively 500 to 600 

 meters (analysis number 3). 



Now it is important to make sure, if possible, whether these waters are 

 (1) downward circulating pluvial waters which have become thus en- 

 riched, or (2) originally buried connate waters, or (3) volcanic emana- 

 tions, such as those recently collected and studied by Lincoln® for Kemp. 



Table of Analyses. 



Analysis number 



1. 



2. 



3. 



4. 







Xiocation 



Quincy mine, 



fifty-fifth 



level. 



South 

 Kearsarge 



mine, 

 ninth level. 



Republic 

 mine, 



1,600-foot 

 level. 



Watford, 





near 

 London, 

 England. 



CI 



176,027 



2,200 



86,478 



15.188 



'411 



110 



20 



10 



4 



16 



6 



trace 







20 



trace 







702 



25,360 



12 



B, 





Ca 



Na 



91' 

 414 



7,902 

 7,290 



110 

 11 



K, 





SO4 



75 

 35 

 30 



1,045 



7 



SiOj 



12 



(FeAl).,0,. 



700 



Mn} trace 



n. d. 

 n. d. 

 n. d. 

 n. d. 

 566 

 n. d. 

 n. d. 





NH, 



NO3 19 



Cu 





Org 12 



Ni 





Sr 







Ba Li 







Mo- 









B 







CO., 





156 









t-^um 



280,490 

 280,500 



1,347' 

 1,350 



42,863 

 45,590 



338 



Total solids 



351 







■> J. F. Kemp : Conti-lbutions from the Geological Department of Columbia University, 

 vol. viii. no. 61, p. 5. Compte Rendu, International Geological Congress, lOth session, 

 Mexico, 1906, p. 521. 



Economic Geology, 1907, p. 258. 



