Show GEOLOGY OF NEVADA CAMPS United Unit d States Engineers Out With Preliminary Reports on Gold Districts TO SEARCHLIGHT MUCH VALUABLE DATA TO MINE OWNERS COMPILED A detailed Investigation of or the geol gool geology geo ogy og of Goldfield Bullfrog and other ml districts in southern Nevada evada was wag earned carried on during the autumn and win winter winter winter ter of oC by members of or the United States geological survey Complete re reports reports reports ports on these districts are now In prepare preparation tion but a II preliminary bulletin has been prepared by MASSIS K I 1 1 T Ransome Hansome W WH II If Emmons and G C H U Garvey which is III immediately available and should be of value alue to t all nil In the development cf t f mining mInin districts In this general area The discovery of oC Tonopah in 1900 1000 marked for Nevada the beginning of a aw aw ew w era ent in Its mining Industry which In Int t to Ie years ears following the decline of the had sunk to a very low ebb Ibb As AR the tho size and richness of oC the Tonopah bonanza became known new stimulus was given gen to prospecting and the desert t inges of southwestern Nevada were More ore thoroughly thorough searched than ever be fre Among Arnoni the many new camps that ive ve come com Into existence within the last few years as a result of this activity Goldfield situated in county miles nearly near due south of Tonopah has attained chief chir importance On the Goldfield District The topography general genral geology and anda ce a deposits dellO of or the Goldfield district are described d in this bulletin Tim ThA deposits hitherto of oC most importance in inthe the He district are arc irregular bodies of rich oxidized gold Jold ore The most no notable notable notable table features of these ore oro bodies are their remarkable richness and their equal quai I remarkable irregularity Shipments over 1001 a ton are by b no means uncommon The principal producing mines in the die Goldfield district In the th latter part of were wore the Combination Mohawk Florence January Red Top Sandstorm und and Kendall The Jumbo one of ot the most important properties in the district was Involved in litigation at this time and had produced no ore since the early carl part of it the year car The Tile quartzite mine at Black Butte now part of or the Black Butte Con Cont t property was wa also practically Idle Ille although it had shortly before at attained tamed a considerable production The I Heilly lease although on the th Florence ground round was worked as a separate mine and added about to the production r of f the district In less than two months time 1 Bullfrogs gs Characteristics The Bullfrog district described in this report lies sixty miles of o Goldfield and about twenty miles north porth northeast east PlIt of the great trough of Death Val Yal Jey The principal town is Rhyolite The Theother Theother Theether other ether towns in the district are Bullfrog Beatty Beatt Work ork In the district up to the end cull of the year ear 1901 tr had boon bei confined mainly I 40 to prospecting and anti to blocking out nut ore The Montgomery Shoshone mine is said to havo have shipped about tons of rich rioh ore the original orl Bullfrog about thir thirteen thirteen teen tons and the Denver at the begin beginning beginning ning fling of oC the tho year 1906 shipped 1000 sacks Hacks As s all ore at the time the survey sune mem memo members members bers visited the district had to be b hauled by b wagons to Goldfield or Las Vegas the general tendency among the mine owners was to delay dela shipping until the thc entrance of a should afford bet better ter tr U facilities The study stud of the general geology of oC the Bullfrog district was made by b Mr lr W H II Emmons and Mr Ir G 1 II Carrey Garrey The rocks in the main are tertiary lavas in intricately faulted and tilted All AJI of the theore ore 01 thus far mined or opened up is more or 01 loss less oxidized and n most cases eon con contains on no sulphides The ores as sacked range from Sift to 00 a ton but the de deposits deposits deposits posits on the whole are arl much lower in grade than those at Goldfield It is evi evident dent that the future prosperity of the camp must depend upon the working of ore much Inferior in grade to that sacked for shipment under present conditions Lions The Mines of Searchlight A brief visit was 1906 1 ti tc t the tho Searchlight district which is in inthe Inthe the extreme southern point of or Nevada Neada In InI I Lincoln county count twelve miles west of the river and about fifty miles north of Needles A day da was also spent In Inthe Inthe the Eldorado Canyon Canon district This can canyon yon jon heads about miles north of Searchlight and Is ten miles in length Mining in Eldorado canyon canon Is said to date from about the year 1857 but the Search Searchlight Searchlight light district Is of comparatively recent development ore having been discovered there in The total output of the district Is not known and Is t to estimate It may ma be any anywhere an anywhere where between and The production of the Searchlight district to the end of the th year ear 1905 1906 probably lies be between between between tween and Tho The principal mines and prospects in the Searchlight district are in a belt about four miles long and three fourths of or a mile wide which lies just west of the town The material thus far sloped Is almost wholly gold silver ore It is evident however hoever that below the zone of oxidation ores may ma be ho I expected that will not yield to direct amalgamation Eldorado and Crescent The Thc principal groups of ot mines in the Eldorado district are ar situated near the head bead of or the canyon canon The Impression car carried carried ried away awn from a hasty examination without measurements or assays of the Quaker City Mocking Bird Wall all Street and mines was waR that the de ile development of oC these properties under tinder sin single single gle gb management mana ement and by modern methods constitutes a 1 problem that is well ell worthy worth of ot careful consideration Brief Brier notices are arc given of the Crescent and the Gold Mountain districts A final chapter on the Manhattan district is the work of ot Emmons and Garry Carrey Gold was discovered at Manhattan In April 1903 The production up to March arch 1006 1990 so far as could be learned had been about The typical rich I ore of or the i camp Is either a dense white quartz stained in places to a yellowish color by b iron oxides or a mass of ot porous white quartz formed by tab tabular tabular tabular ular crystals of ot quartz which are I after calcite The average avera ge val yal value ue te has been about a ton This report Is listed as bulletin No Xo and Is published for free distribution It contains a valuable topographic map nap the work of ot R It II H Chapman and B BD BD BD D Stewart of an area covering square miles of southern Nevada Neada |