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<br />21 <br /> <br />Table 2.1, Analysis of Mancos Shale samples used for laboratory tests <br /> <br />(..I.) <br />"'-l <br />~, Saturation Extract - Not Corrected for Percent Moisture <br />C) <br /> (meq/l) <br /> Percent EC ph Sand Silt Clay <br /> Moisture (Ilrnho/cm @ 25 DC) ---Percent--------- <br /> Weathered 36 5667 7.65 19 52 29 <br /> Unweathered 33 13421 8.23 38 36 26 <br /> Clition <br /> Na Ca Mg K Total <br /> Weathered 27,10 27.00 27.00 1.00 82.10 <br /> Unweathered 128.00 18.00 29.00 1.00 176.00 <br /> Anion <br /> HC03 Cl S04 Total <br /> Weathered 1. 88 1.13 78,00 81. 01 <br /> Unweathered 1.25 1.35 172.50 175,10 <br /> <br />2,1 Experimental Measurement of Salt Pick-up at Varying Flow Rates <br />(In a Cylinder) <br /> <br />The purpose of this experiment was to relate solute concentration <br /> <br />to carefully controlled flow rates. The rate of dissolution was <br /> <br />observed with standing water, a slow rate of flow (before incipient <br /> <br />motion) and at rates which produced sediment transport. These <br /> <br />conditions were repeated for two samples of Mancos Shale, weathered <br /> <br />and unweathered. The unweathered shale was grouped into two sizes, <br /> <br />small particles similar to the unweathered material and rock size <br /> <br />particles, <br /> <br />2.1.la Experimental Procedure <br /> <br />The cylinder for this study is shown in Figure 2.1. An electric <br /> <br />motor mounted in the hollow inner cylinder produced circular flow <br /> <br />, . <br />