94 BULLETIN 131, UNITED STATES NATIONAL, MUSEUM 



No. 1 it occurs in a siderite gangue in veins in granite. In tunnel 

 No. 2 of the Champion group claims galena appears as irregular 

 bunches in limestone and on the Easlie claims it occurs along the 

 contact of granite porphyry and an engulfed block of limestone. 

 Two or three carloads of mixed ore, chiefly galena, have been shipped 

 from the district. 63 



In the Bayhorse district galena bearing lead-silver ores have been 

 mined from a number of scattered mines, the most productive of 

 which have been the Beardsley-Excelsior and Red Bird. Other 

 important lead mines are the River View, Ella, Forest Rose, and 

 Dougherty. Most of the mines are inclosed in dolomitic limestones 

 but the Livingston and part of the Red Bird are in slate. The 

 primary ores consist mainly of argentiferous galena with unimportant 

 amounts of tetrahedrite, sphalerite, pyrite, and chalcopyrite. The 

 gangue is chiefly quartz and siderite. The ores are to a considerable 

 extent oxidized to cerusite, etc. 64 The galena is for the most part 

 massive and of comparatively coarse gram. Specimens from the 

 Cave mine show masses of pressure-distorted coarse grained galena 

 surrounded by anglesite, and again fine-grained steel galena altering 

 to massive cerusite and bindheimite. Galena is also an accessory 

 mineral in the silver-copper ores of the same district with chalcopy- 

 rite and arsenopyrite in the midst of predominant tetrahedrite and 

 siderite. A specimen of such ore from the Utah Boy No. 5 tunnel, 

 Ramshorn mine contains galena as small imperfect cuboctahedral 

 crystals in cavities in siderite-tetrahedrite ore. 



In the East Fork or Copper Basin district galena is present as 

 replacement deposits along fissured zones in quartzite. The Starr 

 Hope is the principal mine. The galena, which is partly oxidized, 

 occurs in a bluish quartz gangue. There are several lead prospects 

 also close to the head of Lost River near the Trail Creek Summit. 

 The Phi Kappa mine in Phi Kappa Canyon has been opened to 

 some extent. Ore from this mine is interesting as showing granular 

 galena, with sphalerite and chalcopyrite disseminated sparingly in 

 granular massive grayish garnet. Galena also occurs in a prospect 

 at the head of Little Fall Creek in the same region in coarse grains 

 associated with pyrite in calcite. 



In the Loon Creek (Casto, Lost Packer) district galena occurs on 

 the Lost Eagle claim in Algonkian schist with some pyrite and 

 chalcopyrite in a quartz siderite gangue, and in a vein in granite 

 cutting the Metcalf property from which large pure specimens of 

 coarse cleavable galena have been obtained. Neither has made 

 any important production. 65 

 ■ 



«3 J. B. Umpleby. U. S. Geol. Survey Prof. Paper 97, p. 53, 1917. 

 «< J. B. Umpleby. U. S. Oeol. Survey Bull. 539, pp. 59-7G, 1913. 

 6i J. B. Umpleby. Bull. 539, p. 99, 1913. 



