238 GEOLOGY OF ASPEN MINING DISTRICT, COLORADO. 
Analysis of oxidized ore from Buckhorn No. 2 mine, Tourtelotte Park. 
Per cent. 
Silica((S1Os)s eee Cee sere ek ee ars ee 1.90 
Ditaninmycioxid ey (Ch1O)) esse ee Trace. 
Carbon dioxide (CO) 2292225222 seen ee eee 10. 69 
Sulphur trioxide (SO,) ..-..---------.-.----- 16. 96 
Sulphuni(S)i sess eer ee ee eee -30 
Silvenioxide! GAs: @) sae renee e ee eee .29 (=.27 Ag, silver). 
Copper oxide (CuO) .____.----.---.-_.---__- . 18 (=.14 Cu, copper). 
eadioxide!(Pb@) igs. 55 sos sass eee eee 38.46 (=85.71 Pb, lead). 
‘Alumina ((AVO)) oes es wee ee ene ae 48 
(Hernicioxid ey Hic! ©) Sass tee eee aa 43 
Manganese oxide (MnO) _-____--.-_---_--_-- Trace. 
(Baryitia (a. ©) keen seta Se ENE ellen ay eee 22.11 
Strontiah (SiO) pases ope ee eee ee . 46 
Mime (CaO) Ree Lee ee ee ea es, 7.74 
PaMaonesian(Ma@)asesesse sate ee ee .16 
Belowaldl 0 caaee saan . 05 
WEEN D) oc3) iis trie 33 
100. 49 
hess! @ = S aoa a ann sea ee are ee .15 
100. 34 
The following table represents the approximate composition of the ore 
under the assumption that barium and strontium are present as sulphates 
only, that the small amount of sulphur exists as sulphide of silver and lead, 
that the remaining sulphur trioxide is in lead sulphate, and the rest of the 
lead exists as carbonate. The carbon dioxide left over just suffices to form 
calcium carbonate from the lime: 
Approximate composition of the ore. 
Per cent. 
IBeyruhen, Sllonene) (IBHNSKO),)) =. senesceseo condo s5e seeoee nsedenasmeccer 33.7 
Strombinmay slate (STS Oy) pee eee eee .8 
Lead sulphate (PbSO,)..-. --.-.- pe eho R pee eN Ae aa) heaps a 19.1 
Meadicanbonater((hbDCO, as ast seo ees ee ee 0 ee eae ei eae 26.7 
head sulphider(PRbS) pute sa nase seem e es Oe ne eed epee ae 2.2 
@alciumycarponatiecy (Ca O)) meme eee ae enema ee 14.3 
Silverssulp hi eVect aee se chee ee .3 
97.1 
Othericonstituents. ose sc 2 Gas. eee a ee 2 eee 3.5 
100.6 
