Show SIERRA MADRE development don maguire the ahe eminent geologist and e mining expert of ogden who was in the city recently informs the mining review that mining matters are progressing finely in sierra madre district 1 12 miles north of ogden in which locality he is heavily interested in a number of promising and valuable properties in speaking of the el dorado in this district mr maguire states that assessment work is being done on the devils neck claim for the whole group this work is being done on a big fissure at a point where some rich chloride ores were obtained some ago vein is five feet wide at this place and the ore occurs in manganese in stringers or flecks and very much resembles the high grade ores of the ontario mine at park city in the early history of this great producer it is the intention of the el dorado company of which mr maguire is manager manage to go in at a point below this discovery and drift on the vein for a distance of feet and when this work is accomplished shed it is 19 the expectation that very rich and extensive ore bodies will be en count ered the exploration work aboa L bosq an and d ta 0 o tha he southeast of the chief workings of the BI a dorado has proven the existence of exten sive give ore bodies rich in copper with fairly ani i good values in gold and silver accompany accompany ing that occur in the contact between the th lime stones and upper quart at an alti tude of about feet the main feature of this discovery is that it proves the existence of a hitherto unknown mineral lode that exists in bonanza in this neighborhood and which extends some two or three miles to the northwest constituting what would seem to be one of the most extensive co con per bearing fields of utah the capping of this extensive area consists of iron to a depth varying from 10 to 30 feet and in width from to feet blue and green copper silicates are in evidence along the surface of this area its entire length and upon penetrating the iron for a considerable depth the iron itself cuts out and shows a replacement with copper sulphides sulp hides and silicates which increase in values as depth towards the lime quartzite contact is coined A great portion of the work to be done during the present year on the el dorado will be carried out in this new copper discovery together with the work being done on the silver chloride discovery on the devils neck c aim already mentioned work is being vigorously pushed in the napoleon and mahera adjoining properties in which mr maguire is also interested in the development of this property a tunnel has already been driven into the mountain a distance of feet an the morning of the dinst the night shift broke into f I 1 the vein in the 50 foot crosscut this vein is 14 feet in width and lt its metallic values average from 3 to 30 per cent copper 1 to 4 in gold and from 2 to 10 ounces in silver to the ta ton Arran arrangements geiri ants are being made to carry on the work in this tunnel forward from the ore discovery fis covery for feet directly on the vein at the end of which the great eulalia dyke will have been reached when completed to this point the tunnel wll will have a vertical depth of feet from the surface mr maguire states that work is being done in the district in the development of other promising properties and with most satisfactory results |