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<br />~ .... ~J ", ... <br />JJL1J,)O <br /> <br />Chicfl{!:O Basin. Its impoI"tnnce as a route of l\ccess to the high 'c_ountry <br />and n.s an urCH ill which the ll'ss e.xppriellcf>d call cnjoy wilderness has <br />alrelldy heen discu~s(,d. Other nducs lire reflected in the position <br />takt.(} IJY the Colorado GlUllC', Fish, !lilt! Parks COlllrni.j:.:.ion: <br /> <br />\Ye further recommend. . . (Ohicago Busin-.Johnson <br />Crf'pk) be included in the \Vilderness . . . Xeedle Creek <br />provides an almost limitless vnricty of extremely high <br />qualit.y \\--ildenless expt~ri(,llct'. The scenery is s/)('ctacu)nr, the <br />lh;hin~ excellent and the hunting good. Need e Cn.t'k is the <br />we5tf'fn Ilc-ee8S to the heuvih. traveled rout.e (rom ''''IlUecito <br />Reservoir and is vC'cy import,nnt economiclllly to guides llnd <br />outfitters living in this flTen. <br />Chicago Basin is It n'ry importnnt. cluving ground for elk <br />in this area. It Hlso supports It fnir deer population and <br />pt.armigun liUU blue grollse. <br />The only Rm'ky )lountll.in gouts in southwestern Colorud.o <br />were observed in Chi("lt~o H:lsin this. yellr ha ,"iug mi~u ted <br />from their trfttbplunt sit., 24 miles llWa.y. TIH'~(' llnimals <br />require the t~n)f.' of hnbitnt found in Cllicago Busin and <br />"ill not tolernt.c invasion by man. If this herd is to prO:iper it <br />is illlperutivo thut the Chiellgo Btl.sin-Johnson Crt'(.k area <br />be induded in t,he \Vilderness.' <br /> <br />Th(' tlfor('mf'l1tiol1erl Gf'o!I'gif'ul ~lIIT('.\' Bulletin 1261-F (.valuating <br />tlll' mint'rul feSOllf('(>S of tht~ :ITefl is t.lH' result. of fidel Inincrnl inypst.iga- <br />tion.;,; hy th(> G('olo~('lll Survp.\' find the Burl'uu of !\lil1('::;. TIt(' sllrn- <br />mllr." of this :;tudy i~ :l.R follows: <br /> <br />A ruinernl survey WllS made by the U.S. Geological Surn.y <br />and t.he u.s. Bureau of ~rilles of the odjohling Sltn .ftlltll and <br />Upper Rio Grll.ntltl Primitive .A.Tells, southwe~terII ColorAtlo, <br />and of tl.djaccnL uren..';; propo~t.d for illdu:-::iulI in the X atiouuJ <br />\VildrnH'~:-> Pn':->pI"yutioIl ~"stem. The eomhjned ur~a cover~ <br />about 500 ~qUH.re mile.... of rug!!E'd trJ1'uill ill the Son .Juull <br />).!oulltnins :md i~ described iu this report. fig the Sun JUUll <br />Primitive Arell. Inn~')t.igntion,:; of t.lw primitive Ufea were <br />IIIllUl' by the U.S. Geologic".! Survey during 1965-68, anti <br />thoN." by the U.s. IJuH'nu of ~lillCS w('re lII11dt~ during 1967- <br />6S. .:-\.ltllOugh lit tIe mine-rIl.l product.ion hitS bcpn rcconll'o <br />from the primit.ivt' Uff':}-;, t.l1l~ :lrt'll. bonIN~.. ~evenl.l highly <br />prodllcti,.(' milling di.::>triet~. HIlt} minllbh' mineral th'posit~ <br />probahly exist within parts of till' primitivf' urea as w('11. <br />Oue lltlIltlI"eu ninety-six patf'ntet! cluims lUHf about, 42.5 <br />locat-e-d clnim::. flre widlin or UdjIH'(,lH to the S:m .hulll Prim i- <br />tin' .Arpa. )'IOSl of the pll!enl.t'cl claim:, ure in the Xecclle <br />~!(luntuills mining district. ill t.lll' southw<.':,>t-<'rIl part of the <br />primilivf' nfl'n. w!lf'reu...; 1110:;[, of tile located clHims are in H. <br />lllllTOW belt peripheral 10 the prilll.itin. Hrel\. GoM, ~ilvf'r, <br />('opper. It.ad, zine. llTllniuIIl. :1Ilt! :-,\11(1Ir ore~-; nlluecll\t ahollt <br />$:?5'i,OOO huve been min\.'cl from within or lU"tU' the .sUIl .Juun <br />Primitive Area, nud tilt' Bellrtown (Beltr Creek) mining <br />Jk.trict alollg' the northw(.:'-t Ul:u'gin of tlU! primitive ll.rell is <br />creclitt'd wit.h about is peJ'<..'t'llt- or this tutal. <br />Geologicully, dlf' San .Juan Primitive ..Arell. is diyisible into <br />two }lllrt,:; that cOlltrn..o)t ....trongl)' in age, rock tn)e~, stnlct.ures, <br />and ronditions of origin. The Wl'titern part of the area is <br /> <br />9 <br /> <br />I FuN'-H ~!Tice proposal, pp. ut.H03, ",printed in II. DOCl. n-:!{8. pt. 1& <br />