Page 16 - The Mines of Kingston, New Mexico

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or more of these fractures meet there is usually quite a large pocket of mineral sometimes of high grade and sometimes low. The
quartz veins are of a more uniform character, apparently, as regards theoccurrenceoftheorecontainedbythem. Theyareveryprom- inent factors in the geological structure of the Percha district, as at- tested by the prominence and frequency of their outcroppings. They present no such interesting and complex features as do the others mentioned, the ore being a base mass of quartz mineralized to a greater or less degree, according as it is taken from an ore shoot, or distant from one. There is more or less mineral, however, to be found throughout nearly all of the quartz ledges, as numerous assay testshaveproven. Thefissureveinsinthetrachyteareyetanele- ment of undetermined importance as regards the part they are to take in the future of the district. One of them thus far opened to a
limited extent has proven to be of extraordinary good promise. The veins at Bodie, California, and other noted mining sections, are in trachyte, which is evidence sufficient to warrant a belief highly favorable to the discovery of many good mines in that formation as it exists here. It is a field in which little has been done and one that offers great inducements to the prospector. The best established and most accepted theory of the manner in which mineral has been deposited in the rocks, would account for its presence in the quartz, contact-fissures and the limestone, by its having been brought there through the flowing of the siliceous waters. These had their origin undoubtedly in the trachyte itself, hence it would be unreasonable to suppose the fissures naturally occurring in that rock to be destitute of metallic values. The fact that where found they carry metallifer- ous quartz as a vein-filling, is proof not only of the origin of the ore deposits of the Percha district but also of the statement that much may be looked for from the trachyte fissures in the future.
"The metallic compounds produced by the mines of this district are varied, as is usual with all mineral sections. The predominating form in which silver is found is a sulphide, or silver glance. This is commonly called, by the miners and prospectors, "black metal," ->r "malleable silver." Chloride of silver and bromide is found, with also some ruby and silver in a pure state, or native.
galena, carbonate of lead carrying silver, together with pyritiferous copperandcoppercarbonatesarefoundinsomeofthemines. An-
Argentiferous