Bisbee daily review., 1917-05-06
Development Work of Ari- zona Binghampton Com pany Shows Tendency of Verde Copper Belt to Ex- pend.
TEN FEET OF 10 PCT.
 COPPER IS FOUND
Tendency All Over District For Silver And Gold Values To Show Copper At Depth Again Confirmed.
(By William P. De Wold)

PRESCOTT. Ariz.. May 5--An in- teresting phase of the vivified mining activity everywhere apparent through out Yavapai county is the tendency of the ores in mines hitherto recog- , nized as precious metal producers solely. to at depth change their min eral contents from silver and gold to copper. This metmorphose opens a vista of copper ore yielding possibili- ties in sections other than the famous
 Verde district, and serves to verify the opinion of number of prominent mining men that the ores of Yavapai
 county have a copper base in their stratas of primary enrichment.
 In the days when the United Verde mine at Jerome was controlled by the
 late Frederick F. Thomas. former
 professor of chemistry at Yale Uni
 versity. and associates 1t was quite as noted as a gOld-silver producer as it now is as a producer of copper. Re cent developments in precious metal mines at widely divergent points here disclose transmutation possibilities similar to those recorded in the Unit
 cd Verde mine. The tendency of
 these ores to change their mineral contents at depth is being observed with much interest by local mining men, and serves as an incentive for the resumption of activity at a num- Der of old-time gold and silver proper ties which had for number of years been imperative. The old Leghorn Mines Estate is a case in point:
 Change in Liberalization
 This property was taken over some months ago by the Copper Lode Mines company. an incorporation backed by Chicago capital Work was resumed about six weeks ago under the per sonal supervision of Mir. H. P. Dick inson. a mining engineer of national repute. As the lower levels were un- watered and became available Mir. Dickinson noted a marked change in the naturalization from gold to cop per Further research disclosed even more unmistakable evidence that the cres have copper base and led him to report to the directorate that cop per sulphides in commercial tonnage would probably be encountered at an approximate depth of 1000 feet.
 The estate consists of eight patent ed claims. located about six miles southeast of Jerome on the same gen eral ore belt that extends from the Verde district to the Copper Noun tain and Big Bug districts. Former operators sunk shaft to an incline depth of $40 feet about twenty years ago. established levels at 1O0-foot in- tervals from the 100-fOot point down. opened gold-bearing ore on each level equipped the property with mine and mill machinery. and reclaimed about sS00OO worth of bullion. Then inter nal dissentions paralyzed activity and the mine was closed down. Prior tO inertia. however. a vein from to feet wide. carrying gold values of from sS to s25 and breaking to an av- craze of s2O per ton. was opened on the various levels. This vein is true Assure in granite. and. as stated be- fore. is making into copper.
 In the bottom of the shaft there are a number of strinsers of solid copper pyrites that sample as high as 40 percent copper. The breast of the drift on No. level shows a deposit of copper sulphides that is dipping toward the point where the shaft will tap it as depth is gained While the shaft is being deepened to the perma- nent coppersulphide ore strata the present operators will develop and mine the gold-bearing deposits alrea- dy disclosed and will reduce the ore
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