The Caldera Project – A New Approach

Discovery Harbour intends to further explore the Caldera Project using the low sulphidation epithermal gold model. There is extensive historical data on the property, including work done by 11 different companies, 142 drill holes, with an average length of 113m and an average vertical depth of less than 100m, 1365 soil samples and 804 rock-chip samples. However, all those previous explorers were focused on finding a near-surface, open pit-type deposit. They achieved some good results, but in the low sulphidation epithermal gold model, significant mineralisation is not expected until 300m or greater depth.

Using the low sulphidation epithermal gold model Discovery Harbour has completed a number of positive steps. It recently completed a mapping program which successfully delineated a number of structures and alteration patterns. Samples were analyzed using a spectrometer, confirming that the clay alteration minerals (primarily illite) are low temperature products characteristic of the distal and shallow levels of a low sulphidation epithermal gold system.

The historical results on the Caldera Project include rock-chip samples as high as 193 g/t Au, soil samples as high as 1.3 g/t, and drill results such as 25 ft of 8.33 g/t Au and 10 ft of 37.92 g/t Au. As these were all at vertical depths of less than 100m, management believes the Caldera Project has tremendous potential to be a significant low sulphidation epithermal gold deposit. The WNW trending strike length appears to extend for at least 6.5km, hosting a series of gold anomalies accompanied by strong alteration and related pathfinder elements.

It is important to note that the Caldera Project lies in a fertile gold region, at the intersection of the Walker Lane and Northumberland Gold Belts. It is located less than 50km from Kinross Gold’s Round Mountain Mine which, produced 378,000 in 2015 alone and is a deposit of at least 16 million ounces of gold.

Based on the review of the historical Caldera Project data in the context of a low sulphidation epithermal gold system, the results of its recent mapping program, and its location in a prolific gold area, Discovery Harbour believes the Caldera Project has very encouraging potential to host a significant gold deposit.

Mark Fields, P.Geo., is the Qualified Person for Discovery Harbour as defined in NI 43-101 and has reviewed and approved the technical contents of this website.


Clearly visible WNW-trending, gold-bearing structures. Hole EG-17, from the top of this hill, drilled 25 feet of 4.45g/t Au.

  • Target Areas

  • Conceptual Adara Gemina Cross Section

  • Caldera Drill Highlights

  • Caldera Proposed Drilling

  • Location of Rock Chip Samples on the Caldera Project

  • Bladed Silica After Calcite

  • Altered tuff, assayed 11 g/t gold

  • Breccia with quartz matrix, near rock sample that assayed 7 g per t Au, 900 g per t Ag, large gold in soil anomaly down slope

  • Mark Fields and Alan Morris discussing project

  • Mark Baknes beside hydrothermally brecciated outcrop

  • Soil Sampling Discussion

  • Soil Sampling

  • Soil Sampling ATV

  • Strongly altered area with low temperature clays, indicative of preerved epithermal system

  • Mark Fields examing area with strongly altered low temperature clays

  • Quartz veins and cross cutting chalcedony in heavily altered rock sample

  • Opaline rock outcrop

  • Alan Morris beside strongly brecciated area with opaline silica on left outcrop

  • Alan Morris, examining rock sample

  • Bladed silica after calcite, indicative of preserved epithermal system

  • Bladed silica after calcite, indicative of preserved epithermal system

  • Old shaft on property

  • Mark Fields, Alan Morris discussing rock sample

  • Mark Baknes examining rock sample

  • Mark Baknes and Alan Morris discussing project

  • 21 Reed fragment evidence, supporting conclusion that project is on paleosurface with preserved epithermal system

  • Opaline rock, possible reed fragments on bottom right of sample

  • Mark Fields, Mark Baknes, discussing project beside old shaft