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Guigues Kimberlite Pipe
Opportunity for Discovery
Quebec Diamond Project

Tres-Or’s Guigues Kimberlite Pipe:

Tres-Or Resources Ltd. is targeting its 100% owned Guigues Kimberlite pipe in southwestern Quebec for testing by modern microdiamond methods. In December 2019, Tres-Or’s targeting program completed 5 HQ (62 mm diameter) core drill holes totaling 1,432 m. Each of the 5 drill holes intersected kimberlite. Two of the five holes were vertical and ended in kimberlite at 300 m, demonstrating that the pipe extends to great depth. The Guigues Kimberlite has substantial size (4 to 6 hectares), excellent local infrastructure, and most importantly, highly encouraging diamond indicator mineral chemistry.

Guigues indicator mineral chemistry highly prospective and comparable to De Beers’ Victor Diamond mine in Ontario

The highly encouraging indicator mineral chemistry at Guigues is closely similar to De Beers’ Victor Diamond Mine, and differs from the standard model for diamond exploration. The Guigues Kimberlite diamond potential, like that of the Victor Diamond Mine, is based on high-priority source of diamonds from mantle eclogite and lherzolite rocks, instead of the standard harzburgite (G10) sources. The potential diamond source for Guigues is marked by recovery of eclogite and lherzolite garnets that have distinctive compositions just like diamond inclusions recently described from Victor by Stachel et al. (2018). The dominance of lherzolite garnets as inclusions in Victor diamonds (along with a lesser proportion of eclogite garnet inclusions) is unique among diamond mines around the world, and as Thomas Stachel, the University of Alberta researcher who made this discovery points out, may lead to a new model for diamond targets. The Guigues Kimberlite yields numerous lherzolite and eclogite garnets of comparable diamond inclusion composition, as recently confirmed by application of CF Mineral Research Laboratory’s updated classification system by owner and originator Dr. Charles Fipke. Guigues is thus a priority target for this new diamond potential model.

Guigues story

The Guigues Kimberlite was discovered by De Beers in 1983, and was the first kimberlite pipe discovered in eastern Canada. De Beers drilled two holes (working at the time under the name Monopros), and filed the work with the Quebec government sufficient to hold the claims only until 1989, when the claims expired (ironically, the low cost of operating around Guigues may have contributed to De Beers losing the claims too soon!). Guigues lacked G10 garnet chemistry, and was not further pursued by De Beers. Notably, in 1987 De Beers discovered the Victor Kimberlite, along with others in the Attawapiskat region of Ontario. Like Guigues, Victor lacks G10 garnets and was not prioritized by De Beers, which moved their Canadian focus to the NWT after Fipke’s famous discovery of diamonds there near Lac de Gras in 1992. However, De Beers had completed enough work to keep the Victor claims until the late 1990s, when they went back and refocused on Victor. This refocus better recognized the importance of eclogite as a potential mantle source for diamonds, and utilized more reliable microdiamond testing methods to convince De Beers they had a significant diamond mine at Victor. By this time, however, De Beers had long lost the Guigues claims so refocusing at Guigues was not possible. In fact, Tres-Or Resources had taken control of the claims covering Guigues, and continues to hold them now.

Tres-Or first reached the top of the kimberlite to recover indicator minerals using short RC drill holes in 2011. Included among the recovered indicator minerals were numerous distinctive and high-priority eclogite garnets, comparable to inclusions in diamonds from around the world. In addition, Tres-Or identified a single chromite and several chrome diopsides with compositions pointing to the kimberlite being derived from the diamond stability field. The eclogite garnets with diamond inclusion compositions were especially encouraging because eclogite with abundant diamonds is known from mines around the world.

Because of the distinctive eclogite garnets from Guigues with diamond inclusion compositions , Tres-Or made plans to complete five drill holes for core, testing all parts of the Guigues kimberlite for microdiamonds.

Encouragingly, recent published research with Victor diamonds has further enhanced the potential for Guigues to host diamonds. Specifically, after the research team at U of A led by Thomas Stachel demonstrated that both eclogite and lherzolite garnets occur as inclusions in Victor diamonds (and no G10s!), Dr. Charles Fipke reclassified Tres-Or’s Guigues indicator mineral chemistry using his updated classification system, identifying numerous lherzolite garnets with diamond inclusion compositions just like Victor’s diamond inclusions, in addition to the already prioritized diamond inclusion eclogite garnets. The abundance of eclogite and lherzolite indicators associated with diamond makes Guigues a high-priority unconventional diamond target, just like Victor.

Note that although the indicator mineral chemistry is closely similar to the Victor Diamond mine, this does not mean that the Guigues Kimberlite will necessarily host diamonds. Tres-Or’s microdiamond tests currently underway are required to define it’s potential to host diamonds.

Current 2019 – 2020 Guigues Project Exploration Program

The Company drilled the Guigues Kimberlite Pipe in December, 2019. The primary purpose of the drill program was to collect core for modern microdiamond testing, which has never been done on the property before. Core samples are currently at the lab awaiting analysis.

Tres-Or completed 5 drill holes, broadly testing the Guigues Pipe, and recovering core suitable for modern microdiamond testing at one of Canada experienced commercial laboratories.

Tres-Or strongly believes the Guigues Pipe merits direct testing for microdiamonds at a modern independent Canadian microdiamond laboratory, given the recovery of numerous lherzolite and eclogite garnets comparable to diamond inclusions from De Beers’ Victor Diamond Mine, and the potential for high-quality diamonds as suggested by production from the Victor Mine within the same geological trend.

Quebec Diamond Project

The Company owns a 100% interest in certain mineral claims including the Guigues Kimberlite claims, located in the Notre Dame du Nord area of Quebec. In 2003, Tres-Or paid $133,920, completed $171,200 of exploration expenditures and issued 280,000 common shares with a value of $70,000 to earn its interest in certain of these claims including the Guigues Kimberlite. The vendors retain a 2.0% NSR. The Company may purchase 1% of the NSR for $1,000,000 at any time prior to commercial production of any mineral discovered on the claims and also retains the First Right of Refusal to buy-back the remaining 1.0% NSR. In addition, the Company agreed to deliver 100,000 common shares one day prior to the commencement of commercial production subject to regulatory approval.

The Guigues Kimberlite Pipe Project
Guigues is in a highly desirable location with infrastructure in a Tier 1 mining jurisdiction


Guigues Project Property Location
The Guigues Project is conveniently located 10 km from Notre-Dame-du-Nord, Québec


Strong Timiskaming First Nation Relations
Tres-Or has a long-term and respectful relationship with the Timiskaming First Nation


The Life of a Diamond Exploration Company
The Guigues kimberlite pipe has been advanced to the drill-ready stage


A Tale of Two Kimberlite Pipes with Eclogites
A historical overview of the Victor and Guigues kimberlite pipes


Recent Guigues Indicator Chemistry
Eclogite garnets with diamond inclusion (DI) compositions, similar to the Victor and U2 pipes


Guigues is Highly Prospective for Diamonds
The Guigues kimberlite pipe is highly prospective and similar to the Victor and U2 pipes
  De Beers
Victor Mine
U2 Pipe
Guigues Pipe
 Archean-aged Superior Craton?
 Lake Timiskaming Structural Zone Extension
 Eclogite garnets with diamond inclusions?
 Cr-pyrope with DI compositions?
 Olivine with DI and DI overlap?
 Chromite with DI composition? ?
 Chrome diopside from diamond stability field? ?
 Modern microdiamond testing? Q4-2019
Note: Although the indicator mineral chemistry is closely similar to the Victor Diamond Mine, that does not mean that the Guigues Kimberlite will necessarily host diamonds


Guigues is a Large and Prospective Pipe
2015 helicopter-borne magnetics and 3D inversion model help define the size of the prize


Five Drill Holes Planned for Guigues in 2019
Drill program to collect samples from several phases of the pipe for microdiamond test work



Brunet, J.E., 1983. Assessment report on 4 mining claims in Guigues Township, Temiscaming County, Quebec. Assessment report GM40320 filed with the Quebec government.


Heffernan Virginia, 1993. Guigues Twp. pipe yields macro diamond for KWG, Northern Miner, April 5, 1993.

Stachel, T., Banas, A., Aulbach, S., Smit K.V, Wescott, P., Chinn, I., Fisher, D., and Kong J. 2017. The Victor Diamond Mine (Superior Craton, Canada) – A new paradigm for exploration in unconventional settings. 11th IKC Extended Abstract No. 11IKC-4453.

Ulansky, C., 2009. Metalex announce discovery of large kimberlite pipe in Angola and recovery of large diamonds in Ontario, News Release. Metalex Ventures Ltd. available on