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Uranium in the East Walker River Area, Lyon County, Nevada

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Uranium in the East Walker River Area, Lyon County, Nevada (~oq) 8 qgg-c... T'7~_-~. ~- ~~~- / Uranium in the East Walker River Area, Lyon County, Nevada I Trace Elements Memorandum Report228 UNITED STATES DE-PARTMENT OF THE INTERIOR GEOLOGICAL SURVEY (eloo) ~r'te ')lt~ • This document consists of 30 pages, · plus 5 fig1+res, Series A CATEGORY VII (Deposits west of Rocky Mountains) UNITED STA'r~ DEPARTMENT OF THE INTERIOR G~OLOGICAL SURVEY URANIUM ~ THE EAST WA~ER RIVER AREA LYON COUNTY, NE,VADA By • M. H. Staatz and H. L. Bauer, Jr. August 1951 US Geolog\cai Survey JAN C9 ?fl:}~ Dsnver library Trace Elements Memorandum Report 228 • • 2 USGS - TEM Report 228 The distribution (~eries A) of this report is as follows: 3 copies •• , AEC, Washington (J. C. Johnson) 8 copies • • . • • • AEC, New York (P. L. Merritt) 1 copy • • • • • • • • AEC, Denver ( c·. C. Towle, Jr.) 1 copy •••.•• AEC, Spokane (E. E. Thurlow) 1 copy • • • • • • AEC, Grand J1mction (F. H. MacPherson) 1 copy • • • ~C, .Grand Junction (T. W. Oster) 1 copy • • • • • Columbia Univ., New York (P. F. Kerr) 1 copy • • • • • "' • Univ. Minnesota, Minneapolis (J W. Gruner) 2 copies • • USGS, Washington(Mineral Deposits Branch) 1 copy • • • • • • • • • USGS, Denver (A. H. Koschmann) 1 copy • • • • o USGS, San Francisco (E. H. Bailey) 1 copy •••• USGS, Prescott, Ariz. (C. A. Anderson) 1 copy. • • • o •••• USGS, Joplin (David Gallagher) 1 copy • • o •• ~ • USGS, Madison (Carl Dutton) 1 copy • • • •• ! USGS, Knoxville (R. A. Laurence) 1 copy • • •. • • • USGS, Salt Lake City (R. J. Roberts) • 1 copy • • • • • • • • • • • USGS, Washington(Geo,..hemistry & Petr. Branch) 1 copy • • • • • • • • • • • • • USGS, Washington (Geophysics Branch) 1 copy • . • • • • • • • • • USGS, Washington (Fuels Branch) 1 copy • • • • • • • • • • USGS, Washington (Alaskan Branch) 1 copy • • • • • USGS, Washington (V. E. McKelvey) 2 copies • • • • • • USGS, Denver (L. R. Page) l r.0,v • • • • ~ • USGS, Denver ( J. F. Smith, Jr.) 1 ccpy 0 • USGS, Grand Junction (R. P. Fischer) l copy • • •••• , • USGS, Spokane (A. E. Weissenborn) 1 copy • • • • • • • • • • • USGS, Plant City, FJs.. (J. B. Cathcart) 4 copie~ ••••.•••••••• USGS, Washi~ton (TEPCO) ( j,ncluQ.ing master copy) • • 3 CONTENTS Page Abstract. o , e • o • o ~ • 9 o o ~ o o e o • • • u ~ • • • o 5 Introduction. • 0 • • 0 • • 0 0 • 0 0 • 0 0 0 0 0 ~ 0 0 • • 0 6 Geology • • 0 • • 0 • 0 • • • 0 0 0 • • • • • 10 • • • • • ' • 0 Mineral deposits. q •• o o • o o •• , • ~ • o • • • • • • • 10 Types of deposits C? • • o o • o • • • • • • • ~ • • • • • 10 Radioactivity •• • 0 0 • • 0 0 0 0 • • • 0 • • • • • • • 12 Description of depositso • • • • • , • • • • • • • • • • 12 Far West Willys gro~p " • o o Co\ • • • • • • o • • • 12 Northwest Willys group. 0 • 0 • • 0 • • • • • • ~ • 15 West Willys group • o • • 0 • 0 0 • • • 0 • • ~ • • 17 • West Willys cl~m. • 0 • • • ~ • • • • • • 18 West Willys No. 2 claim. • 0 • • ~ ' • • • • 0 l9 West Willys No. 4 claim. • • 0 • 0 • • 0 0 • • 20 West Willys No. 7 or Old Washington claim. • • 21 Silver Pick property. o o o o • o • o • a o • • • • 23. Grant View hot spring • o • o ••.••••• o • • • 24 Boerlin ranch radioactive areaQ • • • 0 • • • • • • 25 Conclusions • • Q 9 • • 0 • 0 • 0 • • ~ • 0 0 • • • • 0. 0 • • 26. • 4 • ILLUSTRATIONS Page Fi~e 1.-~:i:ndex map, East Walker River area, Lyon County, Nevadae o • o o o o o o o o o o • o • o • o • • • • 7 2.~-Geologic ~P and sections o£ the eastern part of the Far West Willys group of ol~s o o o o o • • • ~ envelope 3.--Geologic map and sections of the West Willys ;In claim • • • o • • o • o ., 0 • 0 • 0 0 0 • 0 • • • • envelope 4.--~eologic map and sections of the West Willys No. 7 claim o o o o o o o • o • o • o • o ., • • o • • • • In envelope 5.--Underground geologie maps of the West Willys Np. 7 cla.i.In e • • • • • 0 0 • • 0 • • • 0 • • • • • • • • In envelope 6.--Mine map and section of the new shaft, Silver Pick propez,tyo o o o o o • • • o ., • • • • ln envelope • TABLES Pa~e · Tabl~ I.-Analyses of samples from the Lewis coal mine, Lyon County, Nevada. o o • .- • o •• o • o ••• • • ll 2.--Vein dimensions, Far West Willys group • • • 0 • 14 3.--Analyses of samples from Far West Willys group • . 16 4.--Analyses of samples from West Willys claim • o 0 • • 19 5.--Analyses of ~amples from West Willys No. 7 or Old Washington claim ., • o o • • • • ., ., o • • •••. 22-23 6.--Analyses of samples from Silver P~ck property. • 24 • 5 • URANIUM IN THE EAST WALKER RIVER AREA LYON COUNTY, NEVADA by M. H. Staatz and H. L. Bauer, Jr. ABSTRAC'r Uraniferous quartz veins and deposits of other types ocQur in an area at least six miles long and three miles wide, along the East Walker River in Lyon County, Nevada. Most of the deposits are on the west side of tne rivero Six properties or. ~eas were mapped, sampled, and tested radio­ • metrically. These prop~rties are: the Far West Willys group, North~ west Willys group9 West Willys group, Silver Pick property, Grant View hot springs, and the Boerlin ranch radioactive area. The East Walke!'! River area is underlain by coarse~grained porphy~ ri tic granite. Cutting the granite are numerous aplite dikes and a few perthite-quartz pegmatites. Faulting was noted in a few plac~s. Radioactive material has been found in t4e East Walker River area in deposits of four typesg (1) quartz veins carrying small amounts of copper9 lead, and silver minerals; (2) partly altered granite ad- j a.cent to quartz veins; (3) gouge zones' and (4) hot spring so The qu,artz vein deposits are the most abundant. The uranium minerals pitchblende and kasolite occur in the quartz veins, in aggregates and • streaks associated with copper and silver minerals~ galena, and barite • 6 • In many qu.ar'tz veins abnormal radioact:i.vity. is absent or only loeally present. Samples collected from quartz veins contained from 0.001 to 0.14 perc: e:n.t uranium; only .five of 46 samples contained over 0. 02.5 per- cent u:r.a.nl.um. Partially altered granite adjacent to the quartz veins in the West Willys No. 7 property contains scattered torbernite, but the highest u:rani.um content noted in deposits of this type was 0.006 percent. The th:ird type of deposit is represented on the Si.lve:r P:.Lck proper­ ty, where a gouge zone of differing thickness contains scattered flakes of torbernite. F:i.ve samples from this deposit contained from 0.00.5 to 0.013 percent uranium. The Grant View hot spring is moderately radioactive near the point • where it issues from the hillside. Laboratory analysis of both water and sand from this deposit shows little uran:Lum content ( 0. 02 parts per m:i.llion), and little radioactivity, indicating that the radioactivity is due to some short-lived daughter product, probably radon .. The uraniferour mat~rial found >-J date i.n the area is of too low a grade and small a size to be of present value. INTRODUCTION Quartz veins and deposits of other types are uraniferous in an area at least six miles long and three miles wide in Lyon Co~~ty, Nevada. (Fig. i.) The area trends north-northeast along the_.East Walker Ri.ver, and most o.f the uranium occurrences are on the west side of the river. The area is in the' Old \vashingt<?n mining district and its western edge •• is in the Mono di.vis~on of the Toiyabe- National Foresto The area is 7 • U. 5. D.liPARTMl'liT OF THE INTERIOR TBACi ELEMENTS ·MEMORANDOM GEOLOGICAL SURVEY - REPORT- !28... 420 120° 119a 118° 117° 116° 115° 114° T ___ ,_ ____ -----1---------- ..----~1-420 I I I , ) I I ).._ I I ~·I 41o :· Winnemuccar-"-.._,.... jit o 1 41 :I ~ ~Elko rv· \Humboldt : 1 I . I 4 ~r.t~----~~~~~~~-C-a-r-so~n--S-/n-k--~------~----7~--~----~\H 4 ~ ~ •Reno ,Eureko i .Ely I .carson ~ 3~~"~--~-+------~------~------~------~-----m\3~I '" .ia.st Walker R1 v~~r 1 ' ',·- . - ·· . .. ArE~£\ II '-, Tonopah ' • 3~r-------+--'~--~------~·~-------+-------+-------r·"', 3i ' I ~ I or~.:~~~ ' ~/~'""<>0~"9 I -~~,~~------+-------~------~i3f 31 r-----~~----~--~ ~~ \ ', I ' I ',, Los Vega! ~·,. 1 3~~------~------4-----~~------~~~------t-~r-" __-~~3~ ' ~ ' Bokersfi eld ' 411 " ~------~~~g7o ______JIIa~o~-----,~,7~o~----~,L6~o------~ll~5~o~==~3~ 0 50 100 MILES FIGURE 1.- INDEX rw. EAST vlALK.&R RIV£ ARE~\_~ • LYON COUBTY, N~VADA • in sees. 28, 29~ 32, 33, 341 and 35, To 8 N., R. 27 E., and sees. 3, 4, 5, 6~ 7, 8, 9, ").7, and 18, T. 7 No, R$1 27 ~ .. , Mt. D;iablo meridian. ~~veral properties in the East Walker River a~ea were mine~ for. silver be.tw~en 1880 and 1900, Past productiqn from the area i~ not knowp but was prqba'Qly small. Work on urani~ AaS c9nsisted only of proe:J"cting. The re~ion is betwee~ 5l00 ~ 6400 feet in altit~e. T~e to- pqgraphy is rugged, and. some slopes are as steep as 45 degr~eso The E~st W~er River has cut a steep V-s~ped Qanyon t~ough granite but at ~re~ept is aggrading. The oeptr~ part of the area ia reached. from ~erington, Nevada • . QVe;r. ll. ~les Qf tarred rpad and .30 miles of d;trt road. A road log from the Yerington post offipe .to t~e West Willys group, in the central part of the area, is given below: !1tlea8!I Depcr~p~ioa o.o YeringumPpet Office- go south on State Highw~ .3. 1~.o Junction - take road etra:i,ght ahea4. State Highway .3 goes to ~ight. 22.(, ~unction - gq straight ahe~. 29o3 East Walker River airatrip, 36.7 Junction ~ turn rigbt to Lewis r~ch • .36.9 JunQtion - keep to left.
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