CHARACTERISTICS OF THE ORE. 13 



mens came respectively from Beaver Creek, Nederland, and Gordon 

 Gulch. Tomblin * states that in the Logan mine at Crisman free gold 

 is sometimes found with ferberite. 



The occurrence of small quantities of gold and silver hi tungsten 

 veins is fairly common, but in many if not most veins the precious 

 metals, though of the same ^encral period of vein formation, are 

 probably of lutiM- deposition than the wolframite. 



Silver seems to occur in greater quantity with the wolframites thanll 

 does gold, and gold in greater proportional quantity with scheelitej 

 but this can not be stated as an invariable rule. 



Hiibn erite is found near Pony, Mont., in quartz veins which have 

 been worked for silver; hi veins prospected for silver but not rich 

 enough to work near Ellsworth, Mammoth district, Nye County, 

 Nev. (the name hiibnerite was given by Riotte to the mineral from 

 this place); at Butte, Mont., 2 on the 300-foot level of the Gagnon 

 mine, where hiibnerite" formed an ore shoot of argentiferous material;" 

 in the Birdie mine 4 miles east of Butte (of very light brownish-yellow 

 color); 3 with silver minerals in the Combination mine, Philipsburg, 

 Mont.; 4 in the mines of Silverton, Colo. 5 (wolframite also); and 

 Tonopah, Nev. 6 Wolframite occurs with silver ore in the Tip Top 

 mine, Tip Top district, near Columbia, Ariz.; in a prospect of A. C. 

 Young's at Old Hachita, N. Mex.; 7 in the Victorio district, N. Mex.; 8 

 in the Sonoma Range, 15 miles south of Golconda, Nev.; at Silver 

 Mines, 10 miles southeast of Ironton, Mo.; 9 and on the Silver Comet 

 and other claims southwest of Pioche, Nev. Wolframites are also 

 found with deposits carrying more gold than silver in the South 

 Homes take mine, White Oaks, N. Mex.; 10 gold quartz veins on Sheep 

 Creek near Salmo, British Columbia; n and gold mines of Lead, S. Dak. ; 

 and at Cave Creek, Ariz., auriferous pyrite occurs with ferberite. 



I Tomblin, M. B., Tungsten; history, occurrence, uses: Facts concerning tungsten mining in world's 

 greatest field, Boulder County, Colo.: Boulder County Metal Mining Association Bull. No. 3, 1912. 



'Weed, W. H., Geclogy and ore deposits of the Butte district, Mont.: U. S. Geol. Survey Pref. Paper 74, 

 p. 80, 1912. See also, Pearce, Richard, The association of minerals in the Gagnon vein, Butte City, Mont. : 

 Am. Inst. Min. Eng. Trans., vol. 16, p. 64, 1888. 



Tomek, F., Tungsten in Montana: Min. World, vol. 28, p. 68, 1908. 



* Goodale,C.W., and Akers, W. A.,Concentration before amalgamation for low-grade partially decomposed 

 silver ores, with notes on the geology of the Flint Creek mining district: Am. Inst. Min. Eng. Trans., vol. 

 18, p. 248, 1890. 



'Ransome, F. L., A report on the economic geology of the Silverton quadrangle. Colo.: U. S. Geol. Survey 

 Bull. 182, pp. 86-87, 256, 1901. 



Eakle, A. S., The minerals of Tonopah, Nov.: California Univ. Dept. Geology Bull., vol. 7, 1912, p. 18. 

 Prof. Eakle calls the mineral wolframite, but states "some of them [the crystals] are exceedingly thin and 

 almost transparent, with a deep-red color." This corresponds with a specimen in my possession and seems 

 to indicate hiibnerite rather than wolframite. 



* Lindgren, Waldemar, and others, The ore deposits of New Mexico: U. S. Geol. Survey Prof. Paper 68, 

 p. 336, 1910. 



Idem, p. 292. 



Haworth, Erasmus, A contribution to the Archean geology of Missouri: Am. Geologist, vol. 1, pp. 294- 

 295,1888. 

 1 Graton, L. C., U. S. Geol. Survey Prof. Paper 68, p. 180, 1910. See analyses 4 and 16, p. 24. 



II Walker, T. L., The occurrence of tungsten ores in Canada: Canadian Min. Inst. Jour., vol. 11, pp. 

 367-371, 1908; Report on the tungsten ores of Canada: Canada Dept. Mines, Mines Branch, p. 37, 1909. 



