594 GEOLOGY AND MINESTG USTDDSTRT OF LEADVILLE. 



Table IV. — Gold and silver deiermina'ions. 



112 



251a 

 59^ 



White Porphyry. 

 do 



.... do . 

 do . 



Lincoln Porphyry . 



Gray Porphyry . 

 do 



Locality. 



Backskin amphitheater, d6bri9 slope. 



'■ Horseshoe," south wall 



Sooth base ol White Eidge 



Summit of White Eidge 



Four-Mile gulch 



Head Four-Mile gulch 



West end of Lamb Mountain 



Northwest slope of Sheep Mountain. 



do 



Silver, 

 percentage. 



0. 000, 024, 



Silver, 

 ounces per 



Gold, 

 ounces per 



-do 



Sacramento Porphyry. 



Green Porphyry 



Pyritiferous Porphyry 

 do 



-do . 



Galena and pyrite 



Pyrite 



Pyritiferons Porphyry 

 do 



.do . 



Diorite 



Porphyrite . 



Dolly Tarden mine, west dike 0. 001, 269 



Dolly Varden mine, east dike 0.000,481 



Arkans.is Valley, east side, above Howland 



Clinton gulch ' 0.000,155 



Mount Lincoln summit I 0.000,034 



Mount Lincoln summit, diflereut specimen from | 0.000,024 



above. I 



Mount Lincoln, dike on south face 0.000,017,1 



East spur Mount Lincoln 



Onota shaft. Johnson gulch ! 0.000,034,3 



North of Onota shaft oO. 000, 137 



Lickscumdidrix bore-hole. Little Stray Horse | 0. 000, 137 



Park. 



Between Sacramento and Pennsylvania gulches. 0. 000, 034, 3 



Mosquito gulch, north wall 0.000,017,1 



Shaft west of Tribune, Breece Hill 0. 008, 68 



Hartford shaft, Breece Hill 0. 000, 275 



Montana shaft, Breece Hill 0.000,045 



South of Ace of Hearts, Breece Hill 0.008,23 



Shaft west of Ohio Bonanza, Breece Hill 0. 001, 34 



South fork of White's gnlch 0.000.113 



Comstock Tunnel, White's Hill 0.000,113 



West of Pilot fault. White's Hill , 0. 000, 103 



Head of White's gukh i None , 



Above Pilot mine. Printer Boy Hill 



Above Oro City, south side of California gulch. 



Rebel Warrior shaft. Ball Mountain 



Red amphitheater, Buckskin gulch 



Bartlett Mountain, near summit 



Buckskin amphitheater, debris slope 



.do . 



"Horseshoe " dike iu limestone - 

 Arkansas amphitheater 



do 



Ehyolite 



Trachyte 



Hornblende-andesite . 

 Granite 



.do. 



.do. 



Black Hill, South Park 



Head of Union gulch 



West slope of Buffalo Peaks 



Big Evans gulch 



Yankee Hill, south of Logan shaft. 



0. 000, 034, 3 

 0. 000, 054, 8 

 0. 000, 079, 1 

 0. 000, 013, 7 

 0. 000, 192, 5 

 0. 000, 048 



0. 000, 017, 1 

 0. 000, 006, 8 

 0. 000, 068, 7 

 0. 000, 092, 8 

 0. 000, 103 



0.37 

 0.14 



0.045 

 0.01 

 0.007 



0.005 



Trace 



0.01 

 0.0 to 

 0.040 



0.01 



0.005 



2.533 



0.1 



0.013 



2.400 



0.390 



0.033 



0.033 



0.030 



None 



0.01 

 0.016 

 0.023 

 0.004 

 0.056 

 0.014 



Trace (1).. 



...do 



0.005 

 0.002 

 0.020 

 0.027 

 0.030 



None . 



..do.. 



(I) 

 (!) 

 None 



Do. 



Trace 

 None 



Do. 



0.033 



0.130 



(?) 



(?) 



Trace 



None 



Do- 



i Complete analysis of this specimen in Table T. 



