58 BULLETIN 131, UNITED STATES NATIONAL MUSEUM 



claim (Cat. No. 55464, U.S.N.M.) mined in 1865 are about 1 cm. 

 in diameter and are well-rounded pebbles of dark yellow gold con- 

 taining some quartz; nuggets of well rounded gold from Bowers Bar, 

 Placerville (Cat. No. 55788, U.S.N.M.) also contain quartz. A 

 specimen from the Green White claim on Moose Creek below Idaho 

 City (Cat. No. 55470, U.S.N.M.) is a pebble about 5 cm. in diameter 

 of equal parts of granular brownish quartz and gold. 



In the Deadwood district the Merry Blue and Union mines pro- 

 duced some gold from ore worked in an arrastre in 1907 and 1909. 



In the Gold Fork (Roseberry) district placer gold occurs in gravels 

 on McKinley Fork in Long Valley. The Evans and Paddy Valley 

 are the principal gravel mines. The gold is in part well worn, in 

 part rough and attached to quartz. Its source is problematic as 

 no veins are known. 



The Quartzburg-Grimes Pass district contains numerous veins 

 of auriferous ore. The Ebenezer claim contained rich surface 

 oxidized ore, but the primary sulphide-bearing ore is very refractory. 

 The Belzazzar mine has galenobismutite (q. v.) associated with the 

 gold in the richest ore. The Gold Hill and Pioneer claims, worked 

 together, form the most important lode mine in the region, having 

 produced gold to the value of $2,225,000 previous to 1898. The 

 ore contains narrow seams which are very rich in gold. The Home- 

 ward Bound-Elizabeth-Mayflower vein averages 1J^ meters in width 

 and its decomposed surface ores were worked in an arrastre but heavy 

 masses of sulphides were encountered at depth. The Gold Hill is a 

 well-defined quartz vein in granite varying from a few centimeters 

 to 2 meters in width. Some sulphides, mainly pyrite, are associated 

 with the gold. The Iowa vein, a short distance north of the Gold 

 Hill, is a narrow seam with streaks extremely rich in gold. The 

 Carroll-Driscoll group produced much gold by sluicing disintegrated 

 veins on the Ivanhoe and Capital claims. The primary ore in the 

 upper tunnel consists of veinlets of massive pyrite and a little quartz 

 which carry free gold. The lower tunnel shows several sulphide 

 veins in a wide shear zone containing large quantities of sericitic 

 gouge. The mineralization consisted of gold with tetrahedrite, 

 pyrite, galena, pale-colored sphalerite, and a little barite in quartz. 

 This has been largely shattered and incorporated in a later gouge 

 of sericite containing masses of pyrite showing well-developed 

 crystals. The Kennebec claim yielded rich sluice ground. Numer- 

 ous veins containing free gold in oxidized limonitic material occur 

 n and along the quartz porphyry dike east of Wolf Creek, including 

 the Golden Chariot, Buena Vista, Big Six, Mineral Hill, and other 

 claims. Near Grimes Pass the Morning Star, Mountain Queen, 

 Pioneer, and other veins yielded oxidized ore consisting of limonite 

 containing native gold with some cerusite, etc. The Barry, Peer- 



