690 



IDAHO MINING DISTRICTS. 



on them, and stains of copper and arsenic were noted. The strike is 

 north to south and the dip steep to the east. 



Two and a half miles southwest of Quartzburg the gold belt begins, 

 at the Ebenezer claim. It is not known to extend west of this point, 

 though gold-quartz float has been found 2 miles farther on, along 

 Dead Man's Gulch. The direction of the gold belt westward would 

 carry it directly to Horseshoe Bend, where the Willow Creek belt 

 begins. The high Boise Ridge is very brushy and difficult of explora- 

 tion, and it is by no means impossible that quartz veins will be found 

 in the intervening stretch. 



TJie Ebenezer vein. This vein is continuous for a distance of nearly 

 a mile across the gap in the ridge between Canyon and Fall creeks, 

 and three important claims are located on it. The Ebenezer claim 

 lies on the Canyon Creek side, and is said to have produced $150,000 

 from sluicing and surface workings. The vein strikes northeast and 



southwest and dips to the 

 southeast, and is encased in 

 granite. It is about 5 feet 

 wide, and consists of sheeted 

 granite traversed by many 

 small and rich quartz veins. 

 The surface ore was very rich, 

 but at a slight depth the gold 

 was contained in sulphides, 

 which did not readily yield 

 it to simple amalgamation. 



Scale. 



feet 



has 

 last 



FIG. 63. Section of Mountain Chief vein, east end of 

 claim. 



Only assessment work 

 been done during the 

 years. 



The Mountain Chief ad- 

 joins on the northeast, ex- 

 tending to the summit of the ridge, at an elevation of 6,000 feet, and the 

 vein is similar to the one just described. It is stated that 10 tons of its 

 ore were milled in 1895, yielding $100 per ton, and much gold has been 

 obtained by sluicing the surface. Sulphurets appear here also in 

 depth. In a surface cut the section of the vein was as shown in fig. 63. 

 The Belzazzar claim lies on the Fall Creek side and has been opened 

 by sluicing and a tunnel, 200 feet below the summit. Bodies of heavy 

 sulphurets, chiefly pyrite, are exposed along the vein. The western 

 part of the vein lies in hornblende-porphyrite, while the eastern end 

 has granite in the foot wall and the same porphyrite in the hanging 

 wall. 



A slightly divergent vein, called the Centennial, lies a few hundred 

 feet southeast of the Mountain Chief, on the summit of the ridge. 

 This vein carries more silver than gold, and shows heavy iron pyrite 

 in a 6-inch seam. 



