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Last modified
1/7/2009 9:58:59 AM
Creation date
11/18/2007 12:27:14 PM
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Mine Books
County
Gilpin
Volume
7
Document
Inspectr
Suffix
C
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<br />t.present tl'ie re is zro geological survey of the district published. <br />.. ~, <br />The countryrocY. is a, gneissic granite cut by a fissure vnin system <br />1'raving a genernl eoursn rangingfrom north east and aout}i west on <br />Zone }land to east and west on t}m other. <br />Intrusive dykes of porphyry are frequently found in close proximity <br />to the veins and have in some cams nn influence on the ore deposition. <br />T7ro vein f filling consists mostly ofaltered country rock 1n all stages <br />of alteration to a light greyish greenrfine grained quartzone and <br />(feldspathic mixture more or loss impregnated with gold bearing iron <br />pyrites and in some canes copper pyrites. The above is generally <br />knovrn an the milling ore and 1n usually 8neoCiAted with solid streaks <br />the above mentioned au,lphiden knovm as smelting ore. <br />The Ve irln vary Lr eri dth from n few inches to anveral feet. Dip <br />ies and in some places reverse their dip with dopth. <br />The Pewabic vain hen a courn e. :J.76°E.and dips to the 0.l'L at nn <br />le of about f,0°. Viidth varies from ~ to lh ft.with an avor~tge of h ft. <br />T}m Richardson vnin hen a eoursn N.fO°bbnnd dips to thn 6.L.at an <br />'ln of about HG°.Avoragn with 4 feet. <br />The lron vein hen a eoursn 11,76°li.and dips to the S.P.at an angln <br />about g6°. Average width 6 font. <br />The vnin ril.ling in much the namn in all the veins above mentioned. <br /> <br /> <br /> <br />
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