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Gran Colombia Gold Corp.

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Summary

Project:

Segovia

Deposit:Segovia
Location:Colombia
Commodities:Gold-Silver
Date:5/10/2018
Report Code:NI43-101
Report Type:Pre-Feasibility Study
Project Stage:Active Mining & Production
Report details:10-5-2018: Gran Colombia Gold Corp. announces a Pre-Feasibility Study report for its Segovia deposit at the Segovia project. PFS Results incl. post-tax NPV of US $129.1M (5%), and 6yr LOM at the project . This report was prepared as a prefeasibility-level
Resources:(Reserve, Prob.): 1.66Mt @ 12.4g/t Au at Segovia
CP/QP:[Resources]: Ben Parsons (SRK Consulting (US) Inc.)
ABSTRACT:This report was prepared as a prefeasibility-level Canadian National Instrument 43-101 (NI 43-101) Technical Report (Technical Report) for Gran Colombia Gold Corp. (Gran Colombia or Company) by SRK Consulting (U.S.), Inc. (SRK) on the Segovia Project, which is comprised of the Providencia, El Silencio, Sandra K Mines, the Las Verticales Veins System (Las Aves, Pomarosa and Pomarosa 2 veins), and the Carla Project. Gold mineralization at Segovia occurs in mesothermal quartz‐sulfidic veins hosted by quartz diorite to granodiorite rocks of the Segovia Batholith. The well-known, partially exploited veins dip at approximately 30° to the east or north‐east. There are also a number of steeply dipping shear-zones hosting quartz veins with a N40W trend in the western part of the concession, termed the Las Verticales Veins System. The modeled vein at Providencia is broadly E-W striking and is geologically continuous along strike for approximately 2.0 km and has a confirmed down dip extent that ranges from 690 meters (m) to greater than 1.3 km, and an average thickness of 0.9 m, reaching over 5 m in areas of significant swelling or thrust duplex and less than 0.1 m where the vein pinches. Locally, the Providencia vein displays significant disruption by faulting, pinch and swell structures, fault brecciation and fault gouge. The sample data for Sandra K and El Silencio, both striking broadly N-S, confirms geological continuity along strike for 1.2 km and 2.2 km respectively and indicates down-dip extents of up to 900 m, with thicknesses and structural complexities that are comparable to the Providencia vein. The mineralized structures show a close spatial relationship with mafic dykes, which are interpreted as pre-dating the gold mineralization.

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