Sep 2 2015
Cornerstone Capital Resources Inc. ("Cornerstone" or "the Company") announces the following project update for the Cascabel copper-gold porphyry joint venture exploration project in northern Ecuador, in which the Company has a 15% interest financed through to completion of a feasibility study. SolGold Plc is funding 100% of the exploration and is the project operator.
HIGHLIGHTS:
- CSD-15-012 ("Hole 12") continues to intersect strongly mineralized diorite porphyry, confirming depth potential of south-easterly extension of the mineralized system at Alpala Central.
- Rig 2 commences drilling of CSD-15-013 ("Hole 13") at Alpala North West.
Figures, photographs and tables referred to in this release can be seen on the Company's website (www.cornerstoneresources.com) or by clicking the link below:
http://www.cornerstoneresources.com/i/pdf/NR15-20Figures.pdf.
FURTHER INFORMATION:
Hole 12 continues, and on September 1, 2015 the hole was at a depth of 1,065 metres. Hole 12 is oriented at an azimuth of 210 degrees and an inclination of ‐87 degrees from a collar position 75m to the south-east of the Hole 5 drill site. Assay results will be released in their entirety on completion of the hole.
SolGold geologists believe that the "Eastern Limb" zone represents broader, higher grade mineralization at depth, and that it may coalesce with the "Main Limb" (western) zone. Drill testing of the prospective lower portion of the Eastern Limb zone is planned in the near future to assess the potential for a much wider target than previously recognized at Alpala Central.
Hole 12 has intersected the "Main Limb" of mineralization from 608.0m, and drilling has continued to intersect increasing copper sulphide visual content to the current depth of 1,065m. Drill core from 608m shows some potassic alteration in association with the early "D10" diorite intrusion. SolGold geologists believe that the presence of continuous visible disseminated chalcopyrite and variable bornite mineralization, in conjunction with "B"-type quartz and "C"-type sulphide veins, confirms the significant south-easterly and depth extensions of the mineralized system at Alpala Central.
The interpreted trend of mineralization is defined by "B"-type quartz abundance along the Hole 12 drilling path as illustrated by the south-west to north-east cross-section in Figure 1.
Drill core examples of mineralization recently encountered in Hole 12 from 608m show early "B"-type Quartz-Magnetite-Chalcopyrite veins overprinted by "C"-type sulphide veins. These styles of veins are characteristic of porphyry copper-gold deposits around the globe (Figure 2).
Rig 2 commenced drilling hole Hole 13 at the Alpala North West drill site on August 29, 2015. This hole will test the inferred porphyry centre at Alpala North-West.
About Cascabel
SolGold Plc owns 85% of the equity of Exploraciones Novomining S.A. ("ENSA"), an Ecuadorean registered company that holds 100% of the Cascabel concession in northern Ecuador. Cornerstone owns the remaining 15% of ENSA, which also holds the rights to the La Encrucijada gold-silver project. SolGold is funding 100% of the exploration at Cascabel and is the operator of the project. Cornerstone's 15% interest is financed through completion of a feasibility study.
Cascabel is located in north-western Ecuador in an under-explored northern section of the richly endowed Andean Copper Belt, 60 km northeast of the undeveloped inferred resource of 982 million tons at 0.89% Cu Junin copper project (0.4% Cu cut-off grade; Micon International Co. Ltd. Technical Report for Ascendant Exploration SA, August 20, 2004, pages 28 & 29). Mineralization identified at the Junin copper project is not necessarily indicative of the mineralization on the Cascabel Property.
Qualified Person:
Yvan Crepeau, MBA, P.Geo., Cornerstone's Vice President, Exploration and a qualified person in accordance with National Instrument 43-101, is responsible for supervising the exploration program at the Cascabel project for Cornerstone and has reviewed and approved the information contained in this news release.
Logging, sampling and assaying
Holes referred to in this release were or are being drilled using HTW, NTW, NQ and BQ core sizes (respectively 7.1, 5.6, 4.8 and 3.7 cm diameter). Geotechnical measurements such as core recovery, fracturing, rock quality designations (RQD's), specific density and photographic logging are performed systematically prior to assaying. The core is logged, magnetic susceptibility measured and key alteration minerals identified using an on-site portable spectrometer. Core is then sawed in half at the ENSA core logging facility, and half of the core is delivered by ENSA employees for preparation at ALS Minerals Laboratories (ALS) sample preparation facility in Quito. Core samples are prepared crushing to 70% passing 2 mm (10 mesh), splitting 250 g and pulverizing to 85% passing 75 microns (200 mesh) (ALS code CRU-31, SPL21 and PUL-32). Prepared samples are then shipped to ALS in Lima, Peru where samples are assayed for a multi-element suite (ALS code ME-ICP61, 1g split, 4-acid digestion, ICP-AES finish). Over limit results for Ag (> 100 g/t) and Cu, (> 1%) are systematically re-assayed (ALS code Ag-AA62, 4-acid digestion, AAS finish). Gold is assayed using a 30 g split, Fire Assay (FA) and AA finish (ALS code Au-AA23).
Quality assurance / Quality control (QA/QC)
The ALS Laboratory is a qualified assayer that performs and makes available internal assaying controls. Duplicates, certified blanks and standards are systematically used (1 control sample every 15-20 samples) as part of Cornerstone's QA/QC program. Rejects, a 100 g pulp for each core sample and the remaining half-core are stored for future use and controls.
Source: http://www.cornerstoneresources.com/