KANSOME. 
LODES OF SAVAGE BASIN. 211 
the point where the intersection probably takes place is a confused 
mass of quartz, altered country rock, and ore over 12 feet wide, with 
irregular walls. From this ore body two veins again diverge, which 
may represent the northwest continuations of the Tomboy and Iron 
lodes. They are here small and have not yet been much drifted upon. 
It is at present impossible to determine the relative ages of the Tom- 
boy and Iron lodes. It is nol unlikely that their ages are substantially 
the same. 
The contact between t lie San Juan breccia and the overlying massive 
andesite belonging to the Silverton series occurs in the Tomboy at 
about the 300 level, but the two rocks are not very readily distin- 
guished under ground. It does not appear that the change in country 
rock has effected any noticeable change in the character or quantity 
of the ore. 
In the general sheeted character of the assuring, in the vitreous 
nature of most of the auriferous quartz and in its shattered and 
stained appearance, in the presence of a Low-grade galena streak near 
the foot wall, and in the almost exclusively gold output, the Tomboy lode 
shows much similarity to the Camp Bird. About nineteen-twentieths 
of the Tomboy product is gold. 
The Tomboy mill is equipped with 2 Union and 1 Blake crusher, 2 
sets ol* rolls, 8 Huntington mills, and 24 Krue vanners. The pulp from 
the Iluntinglons is passed over silvered amalgamating plates, which 
retain over 75 per cenl of the gold. The Iluntingtons are the equiva- 
lent of about 60 stamps, and the capacity of the mill is about 200 tons 
"daily. The power is electricity transmitted from Ames, 12 miles dis- 
tant, to a 150-horsepower motor. A Corliss engine of 120 horse- 
power is held in reserve. 
The water supply of the Tomboy is drawn from a small lake on the 
eastern side of the divide, in Ouray County. It is pumped to the 
mine by electric power from Ames. 
The Tomboy has produced from $4,000,000 to $5,000,000. 
Japan mine. 1 — The Japan vein is nearly parallel with the Tomboy 
and lies to the southwest. It is recognized as crossing the main Tom- 
boy adit tunnel at about 900 feet from its mouth, and therefore about 
835 feet southwest of the Tomboy lode. It has been drifted on for a 
short distance, but in the Tomboy ground is too small to work. The 
workings of the Japan mine lie about one-fourth mile northwest of 
the Tomboy adit, and the two mines are not connected. Not much 
work had been done on the Japan prior to 1891. 
The course of the Japan lode is about N. 47° W. The general dip 
is to the southwest at from 70° to 80°, although on level No. 1 the 
exceptionally low dip of 50° was noted. 
1 Since this description was written, readjustment of the primary triangulation of the United 
States Coast and Geodetic Survey has resulted in placing the Japan and Columbia mines outside 
of the Silverton quadrangle. The descriptions, however, are retained as originally written. 
