Show I 1 geology of the white horse district the gazette of reno nevada in its issue of july devoted several pages to a comprehensive write up of white horse mining district about thirty miles east of reno a section of the west that just now is attracting a great deal of earnest attention at the hands of mining men and within the boundary lines of which there are several bonanza producers and a large number of most promising and meritorious P prospects included in this write up there is is an article on the geological formation of the white horse district by dr G W a prominent mining engineer of denver which we reproduce below as follows the mineral belt of the white horse mining district is an extensive 6 one ne prospectors have located a greater portion from a point to the south on the truckee river to a point on the north near the reserva reservation line south of pyramid lake thus making a belt of about twenty miles in length with possibly an width of two and a half miles at the southern end the surface presents indications of the softer porphyries ries and cr curatorial crat orial action is more extensive As one travels north from this section the mountain range becomes higher and erosions ero are more complete here prospectors have found stronger and better ore and larger exposures this is particularly true in the end of the belt where also the erosions ero have cut the formations in the canyons deep and at such points we find enormously wide presentations of quartz speaking descriptively of the southern end no very marked discoveries of ore have been made although recently reports have come in from that neighborhood indicating some good values at olinghouse the formation and ore structures are of two classes one is to the west where the country rocks are in the main and but slightly metamorphosed these rocks are segmented by large northeast and southwest striking dykes the dykes are highly and very compactly the veins veins are found on either side of the dykes and in some cases smaller veins quartering the dykes the ores in this particular section consist of quartz fel spars with some areas of the softer porphyries ries such conditions are found over quite a wide extent of the territory immediately around the camp of olinghouse the pay portion of the veins would probably average from one to two feet but in places there are short swellings of good ore from these points some very high grade ore has been extracted at depth the sulpha sulphides sulp hides des could be milled and concentrated to the east of the olinghouse in the neighborhood of the ingalls property the formation is materially different here we find the same country rocks but minus the dykes this portion of the district for a few miles northeast and southwest the country is fissured by a zone of porphyries ries with a width of about one thousand feet herein the indicates and depository bodies at or near one or the other of the true walls the character of the ore is lead silver and gold chlorides above and rich silver gold below the ries themselves have been heavily stained with mineral solutions and such stain ings show in cons considerable Id erable width at one place fully fifty feet the ore proper is very high grade but lendi cular in form yet shows evidence that large deposits will be encountered below the soft rocks of the surface the formation here is more purely era cra in action than that of any portion of the district and is the only section that carries any appreciable quantities of lead and silver at depth I 1 would expect less in the porphyries ries and larger deposits from secondary enrichments enrich ments it is a neull zo oi of good possibilities yet one that will have to be mined with great care because of its depository characteristics te north of the olinghouse sections are the canyons of the white horse fort defiance jones secret and big mouth here are found the more recent discoveries little work has been done yet the surface showings of ore are quite extensive we find here the country rocks but more closely cutting back to the gran ites particularly the horn hom blend granite the so called veins are similar to what is found in many portions of northern nevada to wit A highly quartz at places ores are found in quartz on either side seamed with quartzite the better values are on the hanging side and in a heavily iron stained quartz on the foot in places we find a gouge twelve inches in width which is heavily mineralized with and arsenical arce iron carrying low grade or mill values on the hanging wall portion the quartz has good character and a crystallization from copper waters which speaks well for copper gold values at depth the pay here has greater width than the western portion of the olinghouse section in some cases I 1 note five to seven feet on the hanging wall and twelve feet of mill gouge on the foot at some places these two pay portions are separated by a hundred feet of quartzite the pay values here are largely in iron the becomes better as the prospector attains depth and I 1 think large bodies of concentrating ore will be found the fact of the horn blend granite in contact with blocked porphyry with veins cutting and quartering through these formations causes a belief in the strength of these ledges and that shoots will be found at points where veins section the contacts intermediary to these points ore is found sometimes in considerable volume with deeper mining I 1 am quite sure that the dykes will become mineralized if true the future for large low grade bodies of sulphide ore would be assured on the surface the ores are very free milling and quite free from obstructive agencies already prospectors who have worked in these canyons report very good values and very good width but up to the present there has not been enough work done to indicate the size or the extent of their ore shoots to the weary traveler from the desert camps of southern nevada the immensity of quartzite found in this section the heavy the perfect evidence of fissures the enormous erosions ero and exposures the nearness to and contact with the basic granite the evidence of copper gold at depth the nearness to civilization cheap conditions and railroad facilities all contribute to make him feel that this is a section worthy of effort and consideration |