MINERAL RESOURCES. , 697 



"Mule prospect," about four hundred feet up the slope. The shaft is one 

 hundred and fifty feet deep, contact on the surface, true vein in porphyritic 

 rock deeper down. Outcrop is iron outblow. Some good galena was found 

 with the siliceous iron gangue, which is partly vesicular or rather spongy and 

 like pumice stone, with occasionally velvety surfaces of a rich brown. Care- 

 ful analysis will probably show uranium and molybdenum besides the silver 

 bearing galena and the iron. 



A number of smaller prospect holes on the same and parallel leads show 

 the same material as at the " Mule." 



SIERRA BLANCA JUNCTION. 



On the Hill group, one mile southwest of Sierra Blanca Junction, are a 

 number of prospects on siliceous iron outblows and discolored streaks of the 

 country rock. Though most of them seem on the surface in contacts between 

 limestone and the porphyry, they ought to be regarded the outcrops of fissures, 

 as indicated by the character of the gangues and the arrangement of the 

 gangue material, which is more or less oxidized iron garnet, kaolinized por- 

 phyry, etc., with rich copper stains such as green and blue carbonates, copper 

 velvet ore, and manganese in the shape of wad, lampadite, and other combi- 

 nations of manganese with uranium, copper, and iron. One of the prospects 

 near the foot of the hill crops out in a brecciatic quartz lead with bright cop- 

 per stain. The hole seems a few feet sideways from the lead. 



Though all the outcrops in this locality show copper, the probability is that 

 deeper down lead and zinc will be the prevailing ores. 



On the west side of these hills is a prospect shaft thirty-five to forty feet 

 deep. Here we find in the siliceous iron gangue streaks and pieces of galena, 

 and the analysis of the ferruginous gangue material will probably show nickel 

 and uranium. 



EAGLE MOUNTAINS. 



There are only two small prospects in the Eagle Mountains, one showing 

 galena poor in silver, the other one so-called carbonates in limited quantity. 

 Hardly any work is done on these prospects, and only qualitative analyses 

 have been made. More work has been done on the so-called coal mine, which, 

 however, I found full of water and partly caved in, and therefore could not 

 examine the coal. The specimens which I found on the dump burn freely, 

 but leave so much ashes that the material, if it should be there in unlimited 

 quantity, could find only limited use, particularly as a gas coal. Besides also 

 the quantity is questionable, and it seems that to work this coal would be 

 connected with great difficulties and heavier expenses than would be justified 

 by the output. 



