Properties

Highlights

• Target: Copper/Gold porphyry mineralization
• JV between Cornerstone (15%) and SolGold (85%) -- subject to SolGold funding 100% through BFS
• Cornerstone also owns ~10% of SolGold, or ~23% interest (direct & indirect) in Cascabel
• Multiple drill intersections of +1 km of +1% copper-equivalent at Cascabel
• Alpala deposit Maiden Mineral Resource Estimate ("MRE") of 430 Mt @ 0.8% Copper Equivalent (CuEq) Indicated and 650 Mt @ 0.6% CuEq Inferred (3.4 Mt CuEq Indicated 4.0 Mt CuEq Inferred) at 0.3% CuEq cut off.*
• Contained metal content totals a current 2.3 Mt Cu and 6.0 Moz Au Indicated and 2.9 Mt Cu and 6.3 Moz Au Inferred.
• Higher grade core has a current 70 Mt @ 1.8% CuEq Indicated (1.2 Mt CuEq) and 50 Mt @ 1.8% CuEq Inferred (0.8 Mt CuEq) at a 1.1% CuEq cut off. A further 50 Mt @ 1.0% CuEq Indicated (1.0 Mt CuEq) and 50 Mt @ 1.0% CuEq Inferred (1.0 Mt CuEq) is added to the high-grade core if a 0.9% CuEq cut off is used.
• Twelve (12) drill rigs currently in operation
• Potential for growth at Aguiñaga and other targets to be drilled
• See News Releases:
• 18-19 - Cascabel Exploration Update - Continued Growth at Alpala and Aguiñaga
• 18-15 - Cascabel Exploration Update - Further High-Grade Extensions at Alpala Cu-Au Porphyry Deposit - Aguinaga Drilling Reveals Potential for Second Porphyry Deposit at Cascabel
• 18-10 - Cascabel Exploration Update - Alpala NW Hole 37 Indicates Major System Extensions Northwest and North to Trivinio
• 18-09 - Cornerstone files technical report on the Maiden Mineral Resource Estimate for the Alpala Deposit, Ecuador

Details
Funded by joint-venture partner SolGold Plc and targeting porphyry copper-gold deposits, the Cascabel property in northern Ecuador has been the focus of a drilling campaign that produced results indicating the discovery of a large gold-enriched copper porphyry system.

Exploraciones Novomining S.A. ("ENSA"), an Ecuadorean company owned by SolGold and Cornerstone, holds 100% of the Cascabel concession. Subject to the satisfaction of certain conditions, including SolGold's fully funding the project through to feasibility, SolGold Plc will own 85% of the equity of ENSA and Cornerstone will own the remaining 15% of ENSA.

The Cascabel property is underlain by Upper Cretaceous sedimentary rocks which are overlain by Oligocene to Miocene andesitic flows and breccias. These units are intruded by Miocene age granodiorite and diorite batholiths and stocks. Major regional tectonic structures in the area strike northeast. One such structure, the Apuela regional fault, transects the southeast part of the Cascabel property. Several mineral prospects which are hosted in the same geological belt, have been identified in the Cascabel district including the Chical (Au-Ag) and Rio Amarillo (Au-Ag-Cu) epithermal prospects located 12 km to the northwest and 12 km to the south of the property respectively. Cascabel is located upstream from an extensive alluvial gold district, Playa de Oro, located 50 km to the west. Alpala MRE Technical Report

Maps

Regional Map	Infrastructure Map	Development Proposal
Cascabel Targets	Cascabel Drilling	Cascabel CSD-16-016 Core Images
Cascabel CSD-16-017 Core Images	Cascabel CSD-16-15R2 Core Images	Cascabel CSD-16-016 Core Images
Cascabel CSD-16-016 Core Images	Cascabel CSD-16-017 Core Images	Cascabel Drill Intercept Table

Photos

General Topography	Gold Panning	Cross-cutting quartz-chalcopyrite-pyrite veinlets	Malachite along fractures

^{* Mr. Martin Pittuck, MSc, CEng, MIMMM, is responsible for the Mineral Resource Estimate and is an "independent qualified person" as such term is defined in NI 43-101.}