MINERAL RESOURCES. 699 



difficulties to be overcome in working this mine, but all of the low grade are 

 waste ores, since they can net be concentrated on account of scarcity of water 

 and fuel. 



BLACK SHAFT. 



The so-called Black Shaft, which is about fifty deep in clay slate, shows in 

 the partly decomposed dump pile blue and green carbonates of argentiferous 

 copper impregnations; in material fresh from the gangue probably also sul- 

 phides. Quartzose streaks penetrate the slate and seemingly increase in num- 

 ber and thickness as the depth increases. 



This lead shows well defined walls and can easily be traced over three miles 

 in length. 



SANCHO PANZA AND DON QUIXOTE. 



The Sancho Panza and Don Quixote prospects on the road from Allamore 

 station to the Hazel mine, with its numerous diggings, show only pockets 

 close to the surface. It is claimed that ore to the value of about ten thousand 

 dollars was shipped. At present considerable quantities of low grade ore 

 (green and blue carbonates, sulphide impregnations, etc.) form the scattered 

 dumps. 



UNNAMED PEOSPECTS. 



A number of smaller holes are scattered between the Sancho Panza and 

 the Black Shaft on pockets with copper stain, but no connection between 

 these pockets can be ascertained, and it seems as if they were mere sediment- 

 ary deposits, deriving their copper from a silty deposit running between 

 amygdaloid conglomerations and the overlying carboniferous limestones of 

 the Sierra Diabolo Cliffs, which deposit carries in prospected places silver and 

 copper. Some prospects on the so-called Tumbledown Mountain show prom- 

 ising impregnations of carbona.tes and sulphides of copper on leads in contacts 

 of serpentinous, eruptive, and limestone and sandstone country rocks. 



Farther west numerous shallower and deeper prospect holes are scattered 

 over the metamorphic limestone hills, showing streaks and impregnations of 

 carbonates and sulphides of copper; and Mr. Abbott, of Fort Davis, claims a 

 strong vein of silver bearing copper glanz for his prospect, a shaft about sixty 

 feet deep, drowned by the strongly water carrying gangue. 



All the prospects in this district are abandoned, and numerous outcrops 

 which might justify prospecting are not touched at all; partly because the 

 prospectors are afraid their claims might fall on railroad or private land, 

 partly because they have not the money to pay twenty dollars to the surveyor 

 and to risk the fifty dollars to be paid in advance if the claim is on public 

 land. 



