MINES BETWEEN ALTMAN AND GOLDFIELD. 
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which reaches to the southeast about as far as the Christmas mine. The under¬ 
ground developments do not correspond to the surface relations, hut indicate that 
the southern half, at least, of the area of latite-phonolite forms a flat body under¬ 
lain by breccia and that in depth it in all probability connects with the Vindicator 
rock mass. On the tunnel level the rock south and west from the shaft is a breccia, 
while latite-phonolite extends from the Legal Tender vein close to the shaft up to 
the Christmas line. On level 3 latite-phonolite begins 30 feet north of the shaft 
and on levels 4 and 5,130 feet from the same place. The rock is brecciated in places 
along the La Bella vein. On level 6 the same contact is found 350 feet north of 
the shaft in the crosscut which leads direct to the Revenue veins. Brecciated 
rock is again met in spots in the La Bella and Sigel veins. Finally, on level 8 the 
contact lies 400 feet north of the shaft at the Middle vein, and the Legal Tender 
vein is in breccia all along for 270 feet northwest of the shaft. Latite-phonolite 
extends from the Middle vein up to La Bella, and here, as in other levels, doubtless 
connects with the Vindicator area. No normal syenite was seen in the mine. The 
workings on level 10 were not far advanced at the time of the first visit, in June, 
1903, and showed only breccia. A crosscut on level 9, 600 feet long, explores the 
southwestern territory and shows only normal breccia. For the last 100 feet the 
breccia is fine-grained and crumbling, almost without secondary alteration; it con¬ 
tains much phonolite. 
No basic dikes have been found. On level 9 the Harrison vein is in places 
followed by a narrow phonolite dike. Another dike, which also seems locally 
irregular and nonpersistent, in places lies closely to the northeast of Legal Tender 
vein. It was seen on level 3, where it is 35 feet wide and 40 feet from the vein, on 
level 5, and on level 8, where the northwest end of the Legal Tender vein, 270 
feet northwest of the shaft, is in phonolite. It is probably the same dike which 
lies parallel to the Theresa East vein, a spur of the Legal Tender, on levels 7 and 8, 
near the Theresa line. 
THE VEINS IN GENERAL. 
The Golden Cycle mine depends for its ore on three vein systems with a general 
northwesterly, slightly diverging strike and very steep southwesterly dip. If 
continuous these systems would intersect at a point near the Gold Knob shaft in 
Goldfield. The Harrison vein strikes west-northwest and is opened for a distance of 
500 feet about 100 feet southwest of the shaft, and has also been cut in a shaft on 
the Aluminium claim a few hundred feet farther north-northwest. Four hundred 
feet west of the shaft it has, on upper levels, an important spur called the Anna. 
The Legal Tender vein strikes nearly due northwest, and on level 9 lies immedi¬ 
ately north of the shaft; its dip is very steep to the southwest. It has been opened 
for a distance of about 700 feet, beginning in Theresa ground and extending to a 
point 300 or 400 feet northwest of the shaft; drifts are extended on it on all levels, 
including 10. A spur near the shaft and another called the Theresa East vein 
have proved valuable. 
The Revenue system is the most complicated. It lies 500 to 800 feet north of 
the shaft, and the various veins trend north-northwest. Between the Revenue 
and the Legal Tender on levels 6 and 8, but not above, lies the Carr or Middle vein. 
