The copper era., 1908-12-03
Experts of Note Report on the SyIVanite
 Ores.

width from few inches to three feet in places, being stained by iron oxide and highly impregnated with iron pyrite. Judging from present devel- opment and surface indications the value should increase with depth.
 The report has been obtained from Fayette A. Jones, c. E., E. M., IL. D., economic geologist and editor of the South-Western Mines, and from Felix J. De Wilde. E. M., a field geologist in the employ of the Calumet & Ari- zona company of Bisbee. The former is a scholarly man with years of experience in New Mexico; the latter is a thoroughly educated and experi- enced mining expert whose painstak- ing and extended exploration of this district assures the competence of his report. The gentlemen agree wholly as to the geology of the district and class the ores as telluride of gold. No matter how many extensive reports may come forth in the future it may safely be predicted that the above embodies as correct a description of this portion of the Eureka district as shall ever be written. In saying that the dike of trachyte porphry can be traced for more than mile, MT. De Wilde undoubtedly meant that it could be traced from one point ot observation, for it can be traced for more than three miles. As Jones and De Wilde say, the ores are teliuric in character, variously classed as syl- vauite, calaverite, and tetradymite. The most interesting detail of the ore occurrence is the high values found in crystalized lime, called by many "spar' In no other district visited by the writer has such barren-appear- ing rock carried the slightest values; vet here it is one of the richest ores encountered.
 Two miles to the north of Sylvanite is an extremely interesting formation that thus far seems to have been over looked by visiting experts. At that point the range is generally porphy- ritic, traversed by iron ledges trace able from a distance by the dark stains their overflow and erosion have painted upon the mountain slopes. Almost pArelelling that section of the range for about a mile, and distant from it an average of about eight hun dred yards, is a range of hills consist ing of granite and capped by shale and conglomerate, in places sand stone. Between this formation and the main range of the Hachitas is a belt of limestone cut by several parallel ledges having general width of five or six feet and northly dip of about fol ty-f7e degrees. At several places, widely separated and on differ ent lodges, inclined shafts have fol lowed the iron. At the surface the iron carries low gold values that gradually decrease with depth. At a depth of fifty to sixty feet the ledge invariably has become a copper sul- phide. In other places the develop ment has been prosecuted in the form of vertical shaft sunk without re- gard to the dip of tue ledge, but at the same depth the result has been the Sdm6-Sul DuiuC. nlS IL appear as if the entire belt were un- derlaid with copper ore. Ia one shaft a depth of forty feet was attained after the sulphide ore was encounter ed, and the dump shows that not d piece of waste or other ore as large the forty feet. Although your core spondent has not had the sulphide assayed, long familiarity with ore of that character emboldens him con fidentially to estimate the value of the ore body thus far encountered at , per cent. The apparently enor- nous extent of the ore body makes the deposit a notable one, and the possibility of it's increasing value with depth should make it an interesting property in the estimation of mining men. The names of the owners can not be ascertained at this writing. Charles Gerdes, r. B. Ragsdale, Thos. Stuart and John Randall own several claims adjoining the property in ques- tion, and in exactly the same forma- tion. As the above described work was done two or three years ago, the circumstance of it's being overlooked | by copper investors is almost incOn- ceivable. From general appearances it would appear that the owners were looking for gold and had but an made quate knowledge of the value of cop per ore.
 The latest strike reported is that upon the Broken Bottle. Assays from what are said to be general samples run SSO and Sl19. The ore occurs in a drift which will give ten feet depth on the vein and in a shaft that is now eight to ten feetin depth. The highest assay comes from the tunnel, where the vein assayed S35 at the surface. The ore is being sacked and will be shipped in few days. Mr. Criddle, who represents a smelting company of Fl Paso, is making test shipments of ore from here. He is now selecting a shipment of average ore from the Broken Bottle.