The Leon Project Sonora, Mexico Investor’s Presentation July, 2010
Leon Project Location
Leon Project - 2007-08 Drill Targets and SE extension
Mo Soil Anomalies – Leon Target Areas
Cu Soil Anomalies – Leon Target Areas
Diamond Drill Core from the Azul Zone
Diamond Drill Core from the Fortuna Zone
Azul Zone – Drill Section AZ2-AZ2’ - LEDH 17/18 With Mo and Re Assays
Azul North Zone – Drill Section AZ1-AZ1’ - LEDH 15-18 With Mo Assays
Azul North Zone – Drill Section AZ1–AZ1’ - LEDH 15-18 With Cu Assays
Fortuna Zone – Drill Section FO1-FO1’ - LEDH 19 with Mo and Cu Assays
Porphyritic rhyolite with Mo-Cu quartz “stockwork” mineralization in lower plate of the Leon Detachment
Occurrence of Copper in Tertiary granite host Quartz vein with Molybdenite in granodiorite host
Leon Project – Molybdenum Mineralization in Proximity to El Creston Deposit
Leon Project – Sericite Alteration in Relation to El Creston Deposit
Model for Alteration and Mineralization Zonation Near an Upright, Un-faulted Porphyry Deposit: (modified from Lowell and Guilbert, 1970)
Middle-Tertiary Extension: Displacement of Porphyry Ore Bodies along low-angle normal “Detachment” faults Lowell and Guilbert, 1970: The Classic San Manuel-Kalamazoo Connection Porphyry Molybdenum The Leon- Ore Body El Creston Creston Molybdenum Leon Molybdenum Discovery: Deposit: Connection
Middle-Tertiary Extension, Dismemberment and Rotation of Crustal Blocks: Example from the Yerington Mining District, Nevada (Modified from John Proffett, 1977)
Geologic Cross-Section Through Leon Molybdenum Mineralization and Soil Anomaly (> 40 ppm Mo) to El Creston Molybdenum Deposit
Sequential Cross- Section Reconstruction Showing Connection Between Leon Property Mineralization and El Creston Molybdenum Deposit at 54 Ma
Ground Magnetic Survey Results Reveal Many Kilometers of Untested Targets • Azul and Fortuna drill holes with ore-grade Molybdenum tapped medium intensity magnetic anomalies (yellow and light orange colors above) • Several similar ENE trending magnetic anomalies coinciding with surface Mo mineralization have yet to be tested • See additional details in June 23, 2010 News Release: www.colibriresource.com
Leon Project Summary • Leon claim package covers greater than 6,000 hectares and encompasses a large porphyry system that includes high grade lead-zinc- silver-gold mine workings and molybdenum-copper mineralization • Structural reconstructions suggest that Leon Property contains most of the El Creston porphyry system , displaced along post-mineral detachment faults • Phase 1 diamond core drilling has demonstrated high grade, near surface molybdenum mineralization including 72 meters of 0.195% Mo within a 211 meter interval of 0.082% Mo (LEDH-18), plus wide intervals of copper-molybdenum - rhenium mineralization (290.2 m @ 0.047% Cu, 0.025% Mo in LEDH-15 ; 59 to 2530 ppb Re in LEDH- 16, 17 and 18) • DRI LL RESULTS ARE HI GHER GRADE AND NEARER SURFACE THAN THE EL CRESTON OREBODY WHI CH HAS POSI TI VE BANKABLE FEASI BI LI TY PLANNI NG
Exploration Plan • Expand drilling along Azul Zone structures with outstanding prior drill results. 5-10 holes to test down-dip and along-strike extent. • Test porphyry moly-copper targets identified by coincident soil, rock chip and magnetic anomalies in Tinaja Zone. • Test precious metal bearing structures with coincident soil-rock chip and magnetic signature.
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