Show I I SULPHUR MINES MINS Of WYOMING Geological Survey Engineer Describes the Big Deposits Near Thermopolis Recent exploration of the sulphur beds In m the vicinity of Wyo 10 has afforded an opportunity to study the de do deposits posits Iu and the conditions which control their formation h This opportunity was as improved during the fall of ot VMS by E B G Woodruff of ot the United States geological survey suney who ho has lies prepared for the surveys Contributions to Economic Geology lOOS Part I a brief report that embodies the results of his examination The sulphur deposits are three and one ont half haIr miles northwest of Thermopolis But Butone Butone Butone one company is III operating in the area at atthe atthe atthe the present tim A large number of or drill holes put down by b the company compan have found deposits of or sulphur in a zone about mile wide and mile long A thorough prospecting of all the territory in which geologic conditions are I favorable to the occurrence of ot sulphur has not been undertaken but it is believed that the ng zone extends for fora I a considerable possibly halt half a amile amile amile mile to the northwest and a slightly greater distance to the southeast beyond the limits of the proved ground One con condition condition condition that thal is la believed to point to the pres presence presence ence circe of C sulphur within the area outlined above is 18 the occurrence of deposits of If I travertine upon beds of or altered limestone This Thill association all of or travertine and lime limo limestone limestone stone atone seems to be necessary nece ary to the depo ff n a In Inn mn w n I i only o iy small m i particles of t the t mineral i Native aUe sulphur in this district occurs In two forms formIn In small yellow crystals filling veins or cavities In the rocks and andin andIn andin in a massive form where the original structure of or the limestone is retained but where the calcium carbonate is replaced by b sulphur The sulphur is found in cray cre crevices ices channels or cavities such as water watercourses watercourses watercourses courses make where they the traverse lime limestone lImestone stone beds The cavities seem to be por per portions I of subterranean channels through which the hot waters flowed and on the walls of or which the sul sulphur sulphur sulphur was gradually deposited until th the chambers were completely filled or in some places only partly filled before the passage was stopped at some point and the water diverted to other channels No o regular arrangement of the cavities can be discovered although they seem to oc occur occur occur cur in groups at places where the water found free passage In areas area between the groups of cavities only a small amount of sulphur is present but in the enriched pockets the amount reaches 39 30 to 50 60 per percent percent percent cent of the rock or even more and be becomes becomes becomes comes commercially Important Some of ot these abandoned watercourses are ar arranged arranged arranged ranged In a 8 close network with the in so completely mineralized that the wole is now a mass mas of or sulphur Later Laterally Laterally Laterally ally a deposit may be rich at one point and barren 10 feet teet away awe The sulphur ore thus varies from a low percentage as sedated with barren rock to small timan masses of or the almost pure mineral but as the deposits follow no general laws all alJ of the area where geologic conditions are favorable must be tested to locate them Mr Yr Woodruffs report which Is Issued by b the survey as an advance chaper from Bulletin treats trets of ot the location extent geologic relations and origin of the ore deposits depo and describes the pro processes processes ceases of or mining g and refining The pro product product duct dutt finds a market at various points in i Wyoming and adjoining states stated Up CP to I Dec 15 1906 1908 according to a statement of the superintendent of the company compan the plant had produced ro 00 tons of sulphur and was then yielding 10 16 tons a day The ca en capacity capacity of or the plant is 39 O tons a day Bul Bulletin Bulletin letin latin may be obtained without charge by applying to the director of the United States geological survey suney Washing Washington ton D C |