43-101 2008 Technical Report On The La Fortuna Project, Durango ...

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6.0 MINERALIZATION Gold mineralization on the Property is hosted by thinly-bedded volcaniclastic rocks of the Lower Volcanic Series and adjacent dacitic sills or dikes. <strong>The</strong> mineralized zones have locally been oxidized to depths greater than 200 m below surface but an average depth is more in the order of 150 m. Mineralization occurs in a series of northwest-trending lenses up to 150 m in length and 40 m in width. This northwest trend probably reflects individual mineralized volcaniclastic units. While the trend of the individual mineralized bodies is to the northwest, the overall trend of ALL the mineralized bodies is to the northeast, suggesting a possible northeast-trending structural control such as a structure through which the mineralizing fluids gained access to the permissive host rocks. Mineralization in thinly-bedded volcaniclastic rocks is disseminated and occurs with earthy red hematite (Plate 2) or in narrow fractures with earthy red hematite (Plate 2). Quartz is rare although quartz veinlets are present locally. Plate 2. Mineralized thinly-bedded volcaniclastic rocks. Due to extensive oxidation, primary hydrothermal alteration is difficult to characterize. Silicification is rare, although some of the chalcedonic silica may have formed by replacement of volcaniclastic units. Argillic alteration is widespread but may be related to supergene processes. Strong potassic alteration in the form of biotite and potassium feldspar in fractures with some secondary copper minerals within intermediate intrusive rocks may suggest a porphyry copper environment at depth (Arturo Guerrerro, personal communication). 22
Toward the center of the mineralized area, just below the alluvial cover, is an area with abundant chalcedonic silica. This silica occurs as veins and irregular masses and is occasionally mineralized, although it is more likely that mineralization will occur in the immediate, argillized wallrocks (Plate 4). Chalcedonic silica ranges in color from white through ochre and red to black and occasionally is cut by narrow brecciated intervals ranging in width from a few millimeters to a few centimetres. In at least one location, dark gray to black chalcedonic silica is intimately associated with chrysocolla. Plate 3. Mineralized fractures in dacite porphyry. 23
Page 1 and 2: TECHNICAL REPORT ON THE EL CASTILLO
Page 3 and 4: SUMMARY Introduction At the request
Page 5 and 6: Castillo Remaining Mineral Resource
Page 7 and 8: Undiluted Reserves at $550 per Ounc
Page 9 and 10: epresent an incremental increase in
Page 11 and 12: TABLE OF CONTENTS 1.0 INTRODUCTION
Page 13 and 14: Table 4. Driving distances from Dur
Page 15 and 16: Castle Gold has accepted that the q
Page 17 and 18: 2.0 PROPERTY DESCRIPTION, LOCATION,
Page 19 and 20: Figure 2. Map showing mining conces
Page 21 and 22: 2.1.2.3 Property Taxes The property
Page 23 and 24: Table 5. Maximum precipitation in a
Page 25 and 26: 3.0 HISTORY The El Castillo Project
Page 27 and 28: commonly reach elevations of 2,500
Page 29 and 30: Figure 4. Cross-section through the
Page 31: At El Castillo, the presence of cha
Page 35 and 36: 7.0 EXPLORATION In 2006, Castle Gol
Page 37 and 38: 9.0 SAMPLING METHOD AND APPROACH Th
Page 39 and 40: 11.0 DATA VERIFICATION 11.1 INTRODU
Page 41 and 42: Morgain Minerals Inc. El Cairo Gold
Page 43 and 44: 13.0 MINERAL PROCESSING AND METALLU
Page 45 and 46: Table 9. Castle Gold test heap leac
Page 47 and 48: material is relatively consistent a
Page 49 and 50: Plate 6. View of the El Castillo si
Page 51 and 52: 14.2.1 Methods A shift of -500,000
Page 53 and 54: 14.2.4 Pit Optimization Parameters
Page 55 and 56: Undiluted Reserves at $600 per Ounc
Page 57 and 58: Table 13. Comparison of Howe 2003 a
Page 59 and 60: 15.2.2 Change of Land Use The Compa
Page 61 and 62: 16.2.1 Capital and Operating Cost E
Page 63 and 64: Table 15. Operating Cost Summary (U
Page 65 and 66: will be operating the mine indirect
Page 67: Table 17. Sensitivity Analysis - Gr
Page 70 and 71: 16.2.2 Economic Evaluation The Base
Page 72 and 73: Table 23. US$ - Mexican Peso Exchan
Page 74 and 75: • Castle Gold should complete geo
Page 76 and 77: Panteleyev, A., 1996, Epithermal Au
Page 78 and 79: 9. To the best of my knowledge, inf
Page 80 and 81: CERTIFICATE OF AUTHOR dated July 31
Page 82 and 83:
Appendix A Pit Optimization Level P
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