Discovery record
The discovery they named after him
At Castle East in the Gowganda camp, Doug Robinson’s work led to a silver discovery whose first resource averaged 8,582 grams per tonne – about 276 ounces in every tonne of rock. The company named it the Robinson Zone in his honour, and it is still producing headline assays in 2026.
Assays are drill-core lengths; true widths are narrower. These results are from the Castle East property, not this one, and do not show what Eby–Otto contains.
Robinson Zone extended with 13,620 g/t silver and 1.84% cobalt over 0.6 m
Hole CS-21-73W3 at Castle East, including 25,803 g/t silver and 3.60% cobalt over 0.30 m.
Read more › Canada Silver Cobalt Works 29 December 2020New high-grade silver vein – fifth new high-grade intersection at the Robinson Zone
A new vein within 60 m of the Robinson Zone discovery hole, CA-11-08.
Read more › Canada Silver Cobalt Works 11 June 2020Robinson Zone high-grade silver discovery extended
Follow-up drilling at Castle East, Gowganda, a month after the zone’s first resource estimate.
Read more ›Acquire the ground he chose to keep.
Doug Robinson, P.Eng., has staked and explored hundreds of claims across northern Ontario. Eby–Otto is the ground he kept. Buyers get it with his 30 years of field records, his deposit model and his proposed drill holes.
Five decades of finding metal in northern Ontario
Doug Robinson, P.Eng., has spent his career in the silver and gold camps of north-eastern Ontario: underground, in the bush and at the core rack. Canada Silver Cobalt Works’ chairman has described him as having “an exceptional record of precious metal discoveries over the past 50 years.”
- TrainingMining-Milling Technician, Haileybury School of Mines; Honours B.Sc. in Engineering Geology, Queen’s University. Professional Engineer of Ontario.
- 1975–1989 · UndergroundUnderground mining and exploration for Agnico-Eagle Mines, working in mine geology in the Greater Silver-Cobalt Camp, and Canadaka Mines: diamond-drill layouts, core logging and sampling, underground mapping, mine surveying (1981–89) and grade control.
- 1991–2009 · Exploration contractsExploration for gold, silver and cobalt, and for nickel, diamonds and industrial minerals: planning and supervising drill programs, core logging, geophysics, geochemistry, claim staking and NI 43-101 reports.
- 1990s · Kirkland LakeWith prospector James Reed, controlled more than 100 claim units west of the Macassa mine. The best of them became the core of today’s property.
- 1994 onward · Eby–OttoMapped, surveyed and sampled this ground, and wrote 19 Ontario assessment reports on the area (1994–2023).
- 2010s · Castle East, GowgandaAs geological consultant to Canada Silver Cobalt Works, his work led to the high-grade silver discovery at Castle East. The company named it the Robinson Zone in his honour. Its 2020 inferred resource was about 7.56 million ounces of silver (the company now treats it as historical), and new veins are still being hit there in 2026.
- 2021–23 · Eby–OttoBuilt the deposit and alteration model of this property and proposed the drill holes in it.
“I’ve always believed there were more Castles at Castle.” – Doug Robinson, quoted by Canada Cobalt Works, 2019
Sources: his résumé (2020); Canada Silver Cobalt Works news releases of 3 August 2021 and 30 August 2021, Canada Cobalt Works news release of 12 December 2019, and the company’s 2020 resource estimate; Ontario assessment files. Results on other properties do not show what this property contains.
Old-school field data, modern tools
Most of what we know about this property was gathered on foot: cut grid lines, geological mapping, hand-held magnetics, soil and rock samples, all written up by hand. Doug Robinson did much of that work himself, over three decades. We have digitised his records and put them into the Property Viewer, next to the modern drone, IP and LiDAR surveys.
A grab sample is selected by hand and is not necessarily representative of the mineralization.
His work on this property
- Mapped the geology of the claims at 1:1000 with J. Reed, and ran the ground magnetics (1994–96).
- Sampled the Reed showing: 19.75 g Au/mT in a 1994 grab, and 14.04 g Au/mT over 0.40 m in the cut samples of 2017.
- Ran the MMI soil surveys (2012–2018) and mapped the conductors, faults and alteration that the targets are built on.
- Wrote the 2021–23 deposit and alteration model of the property and proposed the drill holes in it.
All of these are public assessment reports, linked from the sampling and drilling pages.
How his work is used here
His reports set the gold signs that our target ranking uses – pyrite–albite alteration, iron-carbonate, magnetic lows, conductors and the structures between the breaks – and their weights. See how targets are found and ranked.