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--------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------------------------- <br /> TOTAL SULFUR TOTAL CARBON DEGREE OF OXIDATION <br /> 108DO 108DO 10800 — <br /> 106W 106DO 10600 <br /> ■ ■ ■ <br /> 10400 104D0 10400 <br /> 102DD 102D0 102DD <br /> 10ODD 100DO 10ODD <br /> a e a <br /> 9800 ju 980D 9800 <br /> �+ Gram Valle►x0verflol,Level uU GrassyValley Overflow Level W Grassy Val Overflow Level <br /> 9600 Pre-Mining WaterTable Range 9600 Pre-(dining WaterTable Rang 9600 Pre-Mining WaterTable Range <br /> 94M 9400 94M <br /> 9200 920D 9200 <br /> 90M 900D 900D <br /> 0 0.5 1 1.5 2 2.5 0 0.2 0.4 0.6 0-8 1 0 6 12 f8 24 30 <br /> carsa,Tuntl Mahon -70M I&MM Total Sulfur (%) carmn TLrrel Ea mMm -70W I m l Total Carbon 1%) GarOM Tunnel EWANM -70M Rana Oxidation(X} <br /> I <br /> Total Sulfur Water Table Marker Total Carbon Water Table Marker Degree of Oxidation Water Table Marker <br /> 1 Total sulfur by LECO furnace. Total Sulfur is a measure of sulfur from metal 1 Total carbon by LECO furnace. Measure of total carbon. derived 1 Degree of oxidation is an estimate of the oxidation of(particularly) sulfides <br /> sulfides (mainly pyrite). gypsum and anhydrite. almost entirely from carbonates. and feldspars made by the site geologist. It uses a scale of 0% (no <br /> 2 Sulfides are naturally oxidized above the water table. and not significantly 2 Carbonates are removed by two processes: oxidation)to 100% (complete oxidation of all constituents). <br /> oxidized below it due to lack of atmospheric oxygen or other oxidants. a. Reaction with H2SO4 from sulfide oxidation above the water table. 2 Oxidation over geologic time occurs most rapidly near the ground surface. <br /> However sulfide oxidation requires water for the reaction. and requires b- Dissolution by groundwater infiltrating vertically from ground surface. and proceeds very slowly below the water table because oxygen is only <br /> removal of the products of oxidation by dissolution and groundwater 3 This removal ceases at or slightly below the water table. as the saturated sparingly soluble in infiltrating groundwater (less than 10 ppm). <br /> transport. Accordingly. sulfide removal occurs above the water table. but is conditions prevent significant oxygen access to the sulfide. 3 Based on the degree of oxidation dropping to close to zero. the historic <br /> accentuated at the water table. 4 Based on this chemical reconstruction. the pre-mining water table was water table appears to occur primarily below elevation 9-650 ft amsl. <br /> 3 Based on the inflection in the total sulfur data. the historic water table was located between 9.500 ft amsl and 9.650 ft amsl. i <br /> I <br /> likely below 9.700 ft amsl in locations where sulfide content is high_ <br /> I <br /> Notes: Source: 169,038 samples from 4,626 bore holes Analyses: C, S analyses by CC&V LECO furnace Scale: No Scale Natural Water Level in the Cripple Creek Diatreme ' <br /> Plots: Average of data in 50 foot vertical sections Water Table Range: Lindgren & Ransome, 1906 Drawn A.Brown PE PLATE 10 <br /> Adrian Brown IgggLing. Geologic logs by CC&V Geology Carlton Tunnel: Elevation in diatreme cited Date 28-Jul-2016 I GEOCHEMICAL MARKERS OF WATER TABLE LOCATION <br />