Mohave County miner., 1907-05-11

:. While this may be true it does nc } disprove the contention, and it
 probable that in the veins in whic the metallic silver terminated with tn zone of secondary enrichment, tha there were no hydrocarbon gases as sociated with the mineralizing solu
 tions at the time of deposition.
 offer the suggestion that the pres
 ence of graphite deposits on the wall
 of a vein together with carbonaceou
 material in the vein associated witt the ore in evidence that at the time O naturalization hydrocarbon gase. were associated with the solutions. Ii is also possible that this same princi pie may account for the metallic cop. per in the Lake Superior region.
 It would be interesting to know ii such graphite stains and carbonaceous deposits are associated with the Lake Superior copper ores.-Hiram w. Hix. on, in Engineering and Mining Journal. 
 One of the most important strikes ever made in the Pyramid district has just been opened up. R. A. Fitz, man. ager of the Sutton company, which owns the Last Chance, recently con- menced work on this property. The shaft of the Chance is sunk in the country rock, and at various levels drifts are run to the ore body. When Mr. Fitz took charge of the property he found drift run from the 2OO-foot level, and stump about twenty feet deep. He concluded to sink his shaft another hundred feet and run new drift to the ledge. He leve'ed up the bottom of the stump and commenced sinking. After sinking sixteen inches he ran into a body of ore, which was cutting across the shaft at an angle. He has sunk fifteen feet farther, and his shaft is full of the ore. He has one wall, but not the other, and from present development the vein is at least seven feet wide. It appears to be blind lead, for there are no indi- cations of it on the surface. When he first struck the ore he found stringers of grey copper tetrahedrite. At the bottom of the shaft, where the vein is at least seven feet wide, the grey cop- per shows all through the ore, some pieces showing spots of the grey metal all through, other pieces will show faces plastered with it from quarter of an inch to two inches thick, and | some pieces are solid grey copper, three or four inches thick. Tests made | by Prof. w. H. Stevens gives values of j2$, 96$, l25$, and others of less values, jhe whole giving value through the seven feet, without sorting, of 47$ per on, and these values will probably in- crease with depth. The importance 'f this strike is indicated by the fact hat no copper had been found in the Last Chance vein, and none in that 'O' eioii oi eiiO StuipS SASCp III OuS evel of the Viola, where one running hree per cent in copper was found Some distance from this strike, in mother portion of the camp, rich cop 'er values are found in the Nelly Bly nd the R. E. Lee. Mir. Fitz left the irst of the week for Elgin, Illinois, he company's headquarters, to con- ult with the other owners of the prop. rty regarding the work to be done on t. He expects to return in ten days. The Last Chance has been idle for many years, although it has been 'orked at times, and if some of the ormer owners and workers could see he strike they were within sixteen nches of, they would mourn because hey did not go those sixteen inches.- liberal.