ART. 9. MINERALOGIC NOTES ON PUCHERITE, ETC.—SHANNON, 5 
TRICHALCITE FROM SHOSHONE COUNTY, IDAHO. 
Some years ago the writer had occasion to visit the property of 
the Liberal King claim near the Lookout Mountain mine on the high 
mountain east of the Forks of Pine Creek in the Pine Creek district, 
Shoshone County, Idaho. The following account is abstracted from 
notes made at that time: 
The upper tunnel of this property has developed a vein 6 to 8 feet wide, striking 
N. 80° W. and dipping 80° southwest. This vein consists of porous quartz inclosing 
much wall rock. Disseminated in moderate amount through this quartz are sul- 
phides, mainly pyrite with less chalcopyrite and arsenopyrite and occasionally a 
little galena and sphalerite. The porosity of the quartz seems to be an original 
condition and not due to the solution or removal of any primary constituent of the 
vein. Some coarse-grained galena was seen in a lens of quartz on the hanging wall 
side of the main vein. Percolating waters have largely decomposed the surfaces of 
the chalcopyrite and pyrite masses, depositing a sooty black secondary sulphide or 
oxide of copper. More intense oxidation has colored the porous quartz by the 
formation of brilliant yellow, blue, and green coatings of secondary minerals. On 
the hanging wall of the quartz vein there isa pronounced fissure having a thoroughly 
Figs. 7-8.—7, OPTICAL AND CRYSTALLOGRAPHIC STRUCTURE OF TWINNED CRYSTAL OF TRICHALCITE. 8 
ORTHOGRAPHIC AND CLINOGRAPHIC DRAWINGS OF SIMPLE TABULAR CRYSTAL OF TRICHALITE. 
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crushed gouge, which is made up entirely of country rock with no drag quartz. Dis- 
tributed along this fissure are streaks of fine-grained brown sphalerite or finely inter- 
grown sphalerite and galena up to several inches wide. 
On the dump of this tunnel there was, at that time, a large pile 
of the quartzose vein material, which was very highly colored with 
the secondary minerals mentioned above. These had the appear- 
ance of arsenates, and specimens collected at that time gave qualita- 
tive reactions for arsenic. The bulk of the coatings was exceedingly 
small, however, and, as no facilities for detailed investigation were 
available, the specimens became lost without their minerals being 
definitely identified. 
Recently a typical specimen of this material from the Liberal 
King claim has been forwarded to the National Museum by the 
United States Geological Survey as a part of the collection of Mr. 
