NI 43-101 Independent Technical Report Mount ... - Adex Mining Inc.

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NI 43-101 Independent Technical Report Rev 02 January 22 nd , 2010 Mount Pleasant North Zone Preliminary Assessment (Project 6526-03) 7-4 Figure 7-3: Mount Pleasant Mine Site Geology and Drill Holes (Figure Credit: Watts, Griffis & McOuat) Thibault & Associates Inc. Applied Process Chemical Engineering
NI 43-101 Independent Technical Report Rev 02 January 22 nd , 2010 Mount Pleasant North Zone Preliminary Assessment (Project 6526-03) 8-1 SECTION 8.0 DEPOSIT TYPES 8.1 General The mineral deposits of Mount Pleasant are unique as they are the largest known tin-tungstenbismuth occurrences in the Canadian Appalachian (Parrish and Tully, 1978). Furthermore, they are prime examples of a combined porphyry-tungsten and porphyry-tin deposits hosted within Devonian age volcanic rocks that are not noted for such mineral deposits. A description of the deposit types is provided below focussing on tungsten, molybdenum, tin-base metal porphyry deposits at Mount Pleasant, which have been the principal exploration target since the 1930s. The North Zone tin deposits have marked similarities to many of the world tin porphyry deposits. However, at the time of the discovery of the tin-base metal mineralization by Brunswick Tin Mines in 1967, it was difficult to establish a geological model for the mineralization as similar deposits were not known in New Brunswick or elsewhere in Canada. Comparisons were made with hypothermal-type ore bodies, those of Cornwall, England, or xenothermal-type Bolivian deposits (Kooiman, 2004). It was determined that the tin-bearing lodes within the North Zone had characteristics similar to some of the Cornish tin lodes (Kooiman et al., 1986: Kvaerner Metals Davy Ltd., 1997). Hosking (1985) concluded that the North Zone tin deposits were similar in a broad geological setting to Bolivian porphyry deposits, excluding the very rich tin lodes, which are characteristic of the Bolivian deposits. He explained that the exo- and endo-tin deposits associated with the apices of granitoid cusps were common and well-documented with examples occurring at Sadisdorf (Germany) and Zinnwald or Cinovec (Czechoslovakia), Queensland and New South Wales, Eastern Mongolia and elsewhere. Furthermore, he suggested that the apex of a granitoid cusp, which has been emplaced in quartz-porphyry at Zinnwald may broadly reflect what was presently indicated in the North Zone granite. Hosking (1985) cautioned that it would be misleading to forecast likely tonnages and grades for the North Zone by considering tonnages and grades of other deposits based on their similarities to the North Zone. The Contact mineralization within the North Zone has been compared to granite-related greisen tin deposits such as such as Cinovec, Krupka and Krasno in Czechoslovakia and the German Democratic Republic (Billiton Canada Ltd., 1985b). Average tin contents in the strongly greisenized zones are of the order of 0.1-0.3% Sn. The Sn:W ratio varies from 1:1 (Krupka) to 5:1 (Krasno) and 10:1 (Cinovec). 8.2 Porphyry Tin-(±Indium) Deposits Porphyry tin deposits have been described in detail below by Sinclair (1995b). These deposits form along extension zones in cratons, particularly post-orogenic zones, underlain by thick crust, possibly cut by shallow-dipping subduction zones. In addition to tin, these deposits can also contain tungsten, silver and indium (as at Mount Pleasant). In Canada, deposits have been found at Mount Pleasant and East Kemptville (Nova Scotia). When East Kemptville was in production it was the major producer of tin in North America. Deposits discovered outside Canada include Catavi, Chorolque and Cerro Rico stock (Bolivia), Ardlethan and Taronga (Australia), Kingan (Russia), Yinyan (China) and Altenberg (Germany). Thibault & Associates Inc. Applied Process Chemical Engineering
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Mount Pleasant Property North Zone
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North Zone Run-of-Mine Ore Reclaim
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Reagent Storage Reagent Preparation
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MASS AND ENERGY BALANCE SIMULATION
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NI 43-101 Independent Technical Report Mount ... - Adex Mining Inc.

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