LINDOREN.] VEINS OF NEAL MINING DISTRICT. 703 



The vein is in width from 2 to 6 feet, and in form and character of ores is bnt 

 little different from the Homestake vein. 



On the Corder property (Sunshine) an ore shoot has been developed on a fault 

 fissure, with the ordinary dip and trend; and 120 feet to the north a parallel vein, 

 dipping 30 to the north, has been opened. Each vein averages 4 feet, and the 

 ores are similar in character and value to the type ores of the camp. 



On Indian Creek, 5i- miles southeast of Neal, a vein has been opened on the 

 Stevens and Beck properties for 6,000 feet along its trend. It is a fault fissure 4 

 to 8 feet wide and carries ores similar in character and value to those of Neal. 



On Black Creek, 4 miles southwest of Neal, several veins have been opened and 

 some little production made. Work on them has been done only at odd times. 

 The values are high and the limited developments indicate strong veins. 



Two miles east, along Wood Creek, are two recent developments, the North 

 Star and the Clements mines, both being of the common type of the district. In 

 the first named arsenopyrite occurs. 



Milling charges have been $5 per ton; transportation, from $1 up, and the mill 

 saving not over 55 per cent that is, only the free gold thus requiring 12 to $15 

 ore to pay the outside expenses only. To the smelter the charges aggregate $28 to 

 $35 per ton. It would be safe to say that nothing less than $25 rock would return 

 more than wages to the owner unless he had a mill. The average claim owner 

 had either to make the claim pay or limit the development to the annual assess- 

 ment, carelessly done. The work in the camp is a result of this condition and 

 fully illustrates it. 



To these full notes of Mr. Howe should be added only the statement 

 that the alteration of the country rock adjoining the veins is of the 

 same character as that at other places within the region described. 

 The black mica is bleached, being converted to carbonates and to 

 white mica. The feldspars are converted to an opaque white matter, 

 which is neither kaolin nor talc, but sericite in extremely fine-grained 

 aggregates. The quartz grains remain unaltered in general, and 

 pyrite and arsenopyrite are often introduced. The principal value 

 of the veins is in the filling that is, in the solid quartz accompanied 

 by sulphides. But the altered granite next the filling here sometimes 

 also carries good value. 



BLACK HORNET MINING DISTRICT. 

 TOPOGRAPHY. 



This district and its continuation northward (the Deer Creek min- 

 ing district) is on the eastern side of the Boise Ridge, on the slope of 

 the ridge culminating in Lucky Peak. It is 8 miles east-southeast 

 of Boise, and is situated at elevations ranging from 4,500 to 5,500 

 feet. The topography is very accentuated; deep, sharply incised 

 V-shaped canyons score the slope of the Lucky Peak, draining to 

 Boise River and to Moore Creek. 'Scattered timber covers the hill- 

 sides at higher elevations. The topography is indicated in a some- 

 what generalized way on the Boise sheet. 



