To: Little Joe who wrote (4471 ) 1/24/2003 3:54:50 PM From: russet Read Replies (1) | Respond to of 4504 Man has about 4.5 million oz Au resource at $300 gold,... near 100 million oz Aghttp://www.manhattan-min.com/s/ReservesAndResources.asp The reserves and resources for the Tambo Grande Project as at December 31, 2000 are calculated in accordance with National Instrument 43-101 — Standards of Disclosure For Mineral Projects. The resource models and mineral reserves have been independently developed for Manhattan by AMEC E&C Services Ltd. (formerly AGRA Simons Limited) of Vancouver B.C. The Qualified Person for AMEC is Stephen Juras, PhD, P. Geo. TG1 Gold Deposit: Mineral Tonnes Grade (g/t) Resources Gold Silver --------------------------------------------- Indicated 9,609,000 3.07 53 Inferred 910,000 2.89 51 Mineral Tonnes Grade (g/t) Reserves Gold Silver --------------------------------------------- Probable 8,179,000 3.34 58.7 The resource is presented based on a cut-off grade of 0.5 g/t gold. High values have been cut. The reserves are calculated on a Net Smelter Return (NSR) cut-off of US$8.10, which covers processing, and G&A costs. The open pit design shows that the deposit can be mined at a strip ratio of 3.8 (waste:ore). The Mineral Reserves are contained within the Mineral Resources. TG1 Sulphide Deposit: Mineral Tonnes Grade Resources Copper Zinc Gold Silver % % g/t g/t ---------------------------------------------------------------- Type 1 Indicated 15,369,000 2.2 0.1 0.6 25 Inferred 846,000 2.1 0.1 0.6 20 Type 2 Indicated 25,458,000 0.9 2.2 0.6 33 Inferred 1,078,000 1.0 2.4 0.5 27 Type 3 Indicated 12,784,000 2.0 0.1 0.4 16 Inferred 787,000 1.9 0.1 0.3 13 Stockwork Indicated 2,545,000 1.3 0.1 0.1 5 Inferred 584,000 1.3 0.1 0.1 5 ---------------------------------------------------------------- Total Indicated 56,156,000 1.6 1.0 0.5 24 Inferred 3,295,000 1.5 0.8 0.4 15 Mineral Tonnes Grade Reserves Copper Zinc Gold Silver % % g/t g/t ---------------------------------------------------------------- Type 1 Probable 14,695,000 2.1 0.1 0.6 23 Type 2 Probable 19,549,000 0.8 2.2 0.7 33 Type 3/ Probable 23,590,000 1.7 0.4 0.4 19 Stockwork ---------------------------------------------------------------- Total Probable 57,834,000 1.5 0.9 0.5 25 The resource is calculated using a cut-off grade of 0.75% Cu equivalent. Cutting factors have been applied only to gold and silver. The reserves are calculated on variable NSR cut-offs (Type 1 = US$6.60, Type 2 = US$7.80, Type 3 and Stockwork = US$5.60), which covers processing, and G&A costs. The open pit design shows that the deposit can be mined at a strip ratio of 1.1:1 (waste:ore). The Mineral Reserves are contained within the Mineral Resources. All Mineral Reserve calculations are based on the following metal prices: Copper US$0.90 per pound Zinc US$0.55 per pound Gold US$300 per ounce Silver US$5.00 per ounce TG3 Sulphide Deposit: Mineral Tonnes Grade Resources Copper Zinc Gold Silver % % g/t g/t ---------------------------------------------------------------- North Deposit 25,000,000 0.9 2.2 0.7 29 South Deposit 57,000,000 1.0 1.0 0.8 23 ---------------------------------------------------------------- Total 82,000,000 1.0 1.4 0.8 25 The resource is calculated using a cut-off grade of 0.5% copper equivalent. No cutting factor has been applied.