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Last modified
1/7/2009 8:33:43 AM
Creation date
11/18/2007 11:53:08 AM
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Mine Books
County
Gilpin
Volume
6
Document
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G
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1 <br />ORE BODIEC AND ORES. <br />;~~~i The O'Neil vein, has a strike of about N „ 45 degrees E <br />i+1a: <br />I~, dipping to the S.E. at angles varying from 75, to 90 degrees, <br />Plidth varies from 6 in, to 16 ft., with an average width of about <br />f,; I <br />'i'~'I 4 ft, <br />`~i~ ~ li, The vein filling, is a quartzose and feldspathic mixture, <br />~y'i ~ il', highly silicious, and carrying much free quartz, thickly impreg_ <br />~~~~~I'~~~ ~~ ,~~~' nated with iron and co <br />~I !`r pper pyrites, usually accompanied by a seam <br />4ili~ il`:, of solid, gold bearing iron and copper pyrites, varying in width <br />if frmn a few inches, to several feet, The gangue accompanying the <br />rl I ~ iVl~l <br />'~I;~ ore is a soft crhitish or ale <br />p greenish rock, consisting chiefly <br />f? e fl Ili of a decomposed, or altered feldspathic material, mixed with quartz, <br />~3r I(` I when highly <br />III Mil and impregnated veith pyrites aonstitutes the mill ore, ranging in <br />• "e,~ ~ ~~~,,I~i values from ~5 per ton, up. <br />~~i,~~l ~1 'I ~ The consentrated seame of pyritea, constitutes the <br />~~ <br />hy~ ~f rs i smelting ore, producing values in gold, silver, and in some in- <br />i ~ stances, copper. <br />
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