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• ~ III IIIIIIIIIIIIIIII <br />999 <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Depanmenl o! Natural Resources <br />1313 Sherman SI., Room 215 ~ly~~ <br />Denver, Colorado 8020] I <br />Phone: 13031 8663567 <br />FA%:1303) 832-8106 <br />DEPARTMENT OF <br />February 3, 1995 NATURAL <br />RESOURCE., <br />Roy Ramer <br />Goverror <br />Mr. Tom Hendricks lames S. tochhead <br />Ececutive Director <br />Hendricks Mining Company Michael B. Long <br />P.O. Box 653 - Caribou Division Director <br />Nederland, Colorado 80466 <br />RE: Cross Mine, Permit No. M-77-410 - Geochemistry of Gross Mine <br />Head and Tails Satmples <br />Dear Mr. Hendricks: <br />i have finally gotten some time to review the Cross Mine: head and <br />tail sample partial geochemistry results that John Henderson sent <br />to me on October 24, 1994 and November 23, 1994. Nearly etll of the <br />results correspond to the Cross composite head sample. Only the <br />whole rock data was supplied for the Cross composite tail sample. <br />A large volume of Quality Control Reports from Core Laboratories <br />were also enclosed. These Quality Control Reports could probably <br />be eliminated from future submittals to the Division. <br />Composite Head Sample <br />The whole rock data from this sample gives a gross elemental <br />composition of the rock reported in milligrams per kilogretms. Even <br />more important in terms of rock composition are the detailed <br />mineralogical investigations that were performed on thra sample. <br />The Division must compare all geochemical data to the specific <br />mineralogy of the sample from thin or polished section analyses. <br />Will this data be submitted soon? <br />The acid-base potential tests show an acid neutralizing .potential <br />of 89.6 tons CaC03/kt on the lab report and 8.96 in writing next to <br />it. Which number is the actual result? Total and sulfide sulfur <br />are really quite low which may correlate with the low sulfide <br />content of the sample (mineralogy outstanding). Wa.s the head <br />sample analyzed for the metal suite agreed upon (Pb, Zn, Cu, As, <br />Cd, Hg, Ag) before the leaching tests were performed? <br />The Meteoric Water Mobility Test results for the head sample indeed <br />show that no significant amounts of metals were detected in the <br />