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.~ <br />Jeffrey A. Pontius <br />• <br />° 0 ' ~r~~~ ° ;C'~O~G ° ~ D 0 <br />UPLIFTS <br />~~ <br /> <br />~~ <br />CDmDlex. The wettelD aril remained dominantlV tliatremal antl fofinetl <br />the tleewil Part of the Outramal Root zone. <br />FlG. 2 <br /> <br />The alkabne rocks of the Cripple Creak tlistnct are behevatl to <br />have a metallobenic assoCra[lon wrth a alliCa unper•eBturatetl melt. The <br />tl~svlci nos oxen rented to oinar alkabne polo svsnms along ms Great <br />Plains Margin which stretches south to New Maxrco antl nortn Into <br />Momana. Tree Cnople Creek poltl sve[em nos an unusually mph boltl <br />ro saver ratio of about 9:1 . <br />DISTRICT GEOLOGY <br />Pretampnan basement hthOloO~eS at CrIDDIe Creek era: Biobte <br />pnl6s IpOttUldtetl IO De a metamOfOhiC vDICiDppen¢ rock 1.7> D.y~l: <br />GranOtlioriie ISilver Plume ape 1.7 b. y.l: CrlpDla Creek ouirta <br />monxontte 11 .5 b.v.l; Pikes Peak pramte 11 .0 b.v.l. The biotrte preens <br />antl GtlnOtlronte Form a root pBDDBnt t0 the Ouarta mOniOniro whioh m <br />turn was intrutletl Dv [he Pikes Peak batnolith, a large regional <br />Subalkahne mirusrve complex IFipure 31. <br />The bulk or me Cripple Creek volcanic complex R comDOattl of <br />Cripple Creek Breccu, a hipmy variable unn Containing helerohth¢ <br />tl Nttemal DrlcOa antl i mtle aDlCtfUm of volcamcnabGSUbLtlance <br />bretplaa antl betltled tulle. f3dSe aUfpe tlepositi ire also preSenL in <br />some bcabues or me Discreet. The Dretna umts nave Dean mtrutlatl Dv <br />a Berms pr ohonoirte o~kes ono Llla pnmanly along major structural <br />1 0 5014! <br />TI ~ <br />0 50 YIIM <br />N ~ <br />COLORADO <br />MINERAL BELT- <br />CRIPPLE CREEK <br />MINING DISTRICT <br />RIO GRANDE <br />RIFT <br />zones. These bikes on occasion nave usoclacetl explosion or diltramal <br />tlxtvref in then upper extent. The lxplOLOn tlikea are Qerlerally <br />morlOliimt Intl OCCUr Nlouph ppi ills tl1smR. <br />FOIIOwrnp the main tlritrlmallrnlNLVe event. Lhe COmpNa was <br />intruped Dv a series of plugs, flow Oomes antl small stotlu wrth <br />comoosiuon ranging from svenrte to Dnonolite, menu of whiph wen <br />peripheral to the main volCanr[ cenror. The list phase of vokiflrC <br />dcuw[v web the tlevelopmen[ OI Iate•sro0a tliitramal O~Paa and Ne <br />emplacement of ma}ic to ultnmafrt dikes Isee Flbure 41. <br />Recant tletadetl manoinb of Me district nos shown a division of <br />tree volCanlt Complex into two plutclpla ktholopic songs. The WVlirort <br />between these two zones Iles along me 'Cresson Trerrtl', a north- <br />northwest [rending shear through Uta tenter o} the dlsiM. Rocks to <br />the last o} [his their are dominanny mtrUSlve M nature With faldv <br />restnned tlntramal breccn exposures. Racks to tree west of the Nor <br />are tlommantly tliatremal brecW. Al[houbn economic bold daposiro <br />and pas[ production occurred mroubnout me tlismct. the rnaloriry era <br />IDCateO along tree shear or m Ma westam tlutramal none. <br />The Outna s dwitled into three mom sub-Dasms Isee Fsbue 51. <br />The root zone! to these sub-basin! are believe0 Io De IOCJtad of the <br />intersachon points of major tlisttrct-wrW basement stnreturu. Tha <br />tlominant structural fabric presem rn ma dlsintt can ba relarotl l0 two <br />DrimaN regional S[rUttpral ttlntla: nortn-nORhwes[ and nWIMYL <br />These strutturea are commonly steapv dipping, although mall araaa <br />96 RANDOL AT MINEXPO '92 <br />.ra~ <br />