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Author: Admin | 2025-04-28
General Physiographic Area: Rocky Mountain System Physiographic Province: Northern Rocky Mountains Mineral Deposit Model Model Name: Alkaline Au-Te (Au-Ag-Te veins) Orebody Form: PIPE-LIKE Structure Type: L Structure: FAULT CONTACT Type: R Structure: LARGE ROOF PENDANT Alterations Alteration Type: L Alteration: PERVASIVE SERICITIC Rocks Name: Granodiorite Role: Associated Description: GRANODIORITE; QUARTZ LATITE PORPHYRY DIKES (LCV) Age Type: Associated Rock Unit Age Young: Late Cretaceous Name: Andesite Role: Host Description: ANDESITIC VOLCANICLASTIC ROCKS Age Type: Host Rock Unit Age Young: Cretaceous Analytical Data Not available Materials Ore: Proustite Ore: Pyrargyrite Ore: Sphalerite Ore: Pyrite Ore: Galena Ore: Electrum Ore: Chalcopyrite Comments Comment (Deposit): DEPOSIT IS ALSO IN SECTIONS 5, 7, 8 AND 9 T7N, R4W. Comment (Production): PRODUCT RECORD A INCLUDES ALL MILL COSTS FOR ALL PRODUCTS. GOLD AND SILVER (PRODUCTS A AND B) ARE COMBINED AS DORE PRODUCT. BOTH ARE PRODUCTS OF LEACH PORTION OF CIRCUIT. Comment (Geology): OREBODY IS CONTAINED WITHIN DIATREME PIPE. Comment (Ownership): USMX RECEIVES A 5% NSR OR $60,000 MIN TILL PAYBACK THAN 50% NSR AFTER PAYBACK. Comment (Reserve-Resource): REFERENCES 134 & 135 HAVE RESERVE/RESOURCES DATA: HOWEVER DATA COULD NOT BE SUPPORTED BY AVAILABLE ANNUAL & FROM 10-K REPORT DATA. Comment (Production): GOLD AND SILVER YIELDS ARE IN DORE OF UNKNOWN COMPOSITION. . ESTIMATED DORE ASSAY IS: 5.5 PERCENT GOLD AND 89.2 PERCENT SILVER. ASSUMING COMBINED GOLD/SILVER IS ABOUT 95 PERCENT. OF TOTAL COMBINED METALS IN DORE. . Comment (Production): 1988 AU PROD.= 106,000 OZ.; 1989 AU PROD.= 57,242 OZ. 1991-1996 PRODUCTION INCLUDES DIAMOND HILL: Comment (Geology): DEPOSIT IS IN CENTRAL PART OF A DIATREME BRECCIA THAT WAS EMPLACED ALONG THE FAULTED CONTACT BETWEEN ANDESITIC VOLCANICS AND A SEQUENCE OF QUARTZ LATITIC IGNIMBRITES. PRINCIPAL ROCK TYPE IN THE DIATREME IS A MATRIX-RICH BRECCIA. ALTERATION IS SERICITIC IN NATURE. Comment (Reserve-Resource): TOTAL PROVEN + PROBABLE ORE; 12/31/96: NO MINERALIZED MATERIAL PRODUCTION BASED ON AVG OF 1992-1996 ORE MILLED: Comment (Reserve-Resource): GOLD ASSAY IS EQUIVALENT VALUE AND INCLUDES SILVER, ZINC, AND LEAD VALUES: M1C1 JAN. 1987 BOM DEMONSTRATED RESOURCE: 1,113,460 OZ GOLD, M1C2. MAT 2 COL 1 REPRESENTS MINABLE RESOURCE; MAT 2 COL 2 REPRESENTS THE TOTAL RESOURCE AVAILABLE. Comment (Exploration): UNDERGROUND MINING BEGAN IN 1864 AND FLOURISHED UNTIL THE EARLY 1900'S. ; ECON.COM: AU RECOVERY AVERAGES 88%, AG RECOVERY AVERAGES 75%. UNIT COSTS WERE $8.61 PER TON IN LATE 1991. CASH COSTS PER OUNCE OF AU NET OF BYPRODUCT WERE $21 IN 1990 AND $121 IN 1991, THE
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