Technical Report for the Maricunga Gold Mine - Kinross Gold

More documents

Recommendations

Info

Kinross Gold CorporationMaricunga Mine Technical Report17.0 MINERAL RESOURCE AND MINERAL RESERVE ESTIMATE17.1 IntroductionThe Mineral Resource and Reserve Estimates for the Maricunga Project have beenprepared under the direct supervision of Maryse Bélanger, P. Geo., Director TechnicalServices, Kinross Americas.During the course of 2007, a full review of the geologic interpretation and the spatial controlsof mineralization was undertaken for both Verde and Pancho resulting in new resourcemodels to support updated Mineral Resource and Mineral Reserve estimates.17.2 Interpretation and Grade Domains17.2.1 VerdeThe gold grade model for Verde used to rely on a lithological interpretation completed by thesite geologists to discriminate between mineralized and barren lithologic units. Miningexperience at Verde has shown that the mineralization tends to cross over all lithologies.The Verde model update prepared in 2007 incorporates a new interpretation based on abetter understanding of the geology and the mineralization and its spatial distribution.Essentially, mining has shown that the gold content of the material mined is often related toits position relative to the known post-mineral intrusive bodies at Verde East and VerdeWest.The model update is based on the new interpretation for Verde East and Verde West. Theconcept and resulting geometry are the same for both open-pit areas. The mineralizationand its inner limits are defined within a zone of high-grade material centred about a postmineralintrusive. The proximity to the post-mineral intrusive is what affects most the overallgrade distribution.The halo surrounding the higher-grade core is slightly more diffuse and incorporatesmineralization of lesser tenor. The overall concept also concurs with observations in themining areas where the material closer to the PMI displays stronger brecciation and more78
Kinross Gold CorporationMaricunga Mine Technical Reportveinlets often resulting in grades exceeding 1 g/t Au. This compares to grades of 0.5 g/t to0.6 g/t for the rocks located at greater distances and then again decreasing as distancesfrom the PMI become greater. Finally, an external zone of low grade material was modelledbroadly based on a cut-off of 0.15 g/t Au. A typical plan view is presented below in Figure 17-1.Figure 17-1: Typical Plan View of Verde Domaining (Bench 4280)Periphery=3High=1Low =2The domains model developed from cross sectional and level plan interpretation, identifieddistinct zone boundaries that are used as soft boundaries during grade interpolation as perthe conclusions drawn for the contact profiles (see Section 17.4.2.1).The Figure above shows the peripheral zone of approx. 0.15 g/t Au, the low-grademineralization (in green) defined as the material with a gold grade between 0.3 g/t and 0.6g/t. The high-grade (in red) encompasses the material greater than 0.6 g/t Au. Throughoutthis report they are referred to as:• Domain 1 = gold grade greater than 0.6 g/t• Domain 2 = gold grade between 0.3 g/t and 0.6 g/t• Domain 3 = low grade at the periphery based on 0.15 g/t79
Page 1 and 2:
Technical Reportfor theMaricunga Go
Page 4 and 5:
Kinross Gold CorporationMaricunga M
Page 6 and 7:
Page 8 and 9:
Page 10 and 11:
Page 12 and 13:
Page 14 and 15:
Page 16 and 17:
Page 18 and 19:
Page 20 and 21:
Page 22 and 23:
Page 24 and 25:
Page 26 and 27:
Page 28 and 29: Kinross Gold CorporationMaricunga M
Page 110: Kinross Gold CorporationMaricunga M
show all

Technical Report for the Maricunga Gold Mine - Kinross Gold

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?