Why Arctic Star?

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• Discovering New Diamondiferous Kimberlites Using Non-Magnetic Geophysics
• 5 Kimberlites Found Via 2021 Exploration
• Recent Discovery of Arbutus Kimberlite June 2022  is Diamond Bearing

Arctic Star is looking for diamonds at its Diagras Property, NWT and at Timantti, Finland

• World Class Exploration Team Lead By Buddy Doyle
  • Leader of the exploration team that discovered the Diavik Diamond Mine in Canada.
  • Diavik has produced over 100 million carats since 2003
• The Diagras Property contains 20 known kimberlites
• Originally discovered by DeBeers with Mag surveys in the 1990's.
  • Arctic Star is targeting non-magnetics using new and improved gravity technology.
• Detailed, modern ground geophysical techniques are being employed to define possible additional kimberlite(s) or kimberlite phases not identified by previous explorers, who did not utilize all these techniques.
• Diavik has produced over 100 million carats of diamonds since 2003 in the Lac Des Gras Diamond field.
  
• The geophysical work done over multiple exploration seasons has created many drill targets
  
  • 5 kimberlites to date & identified a "Kimberlite Complex" in Sequoia
    
  • Nitrogen Free Diamonds: evidence that this kimberlite complex has the potential to carry >50ct gems

Situated In a Corridor of Economic Diamond Deposits

• Green Diamonds are kimberlites.
• Blue Diamonds are Kimberlites with mine plans that have Greater than 1ct/t.

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New Discovery Arbutus Kimberlite:

Arbutus Kimberlite discovery, of the Diagras project NT. T

"Indicator mineraIs are an important adjunct, when first encounting a new kimberlite discovery. Dr. Fipke's results and interpretation are that:

 

• That the kimberlite is multi-phase, with one of the phases having superior chemistry to the others

• The chemistry is some of the best Dr. Fipke has seen when compared to his global database of diamond inclusions, the results here have a higher percentage and are more abundant by weight of samples that he has encountered previously.

• The chemistry is also permissive for large diamonds.

The discovery was made by testing a Class B type kimberlite target from wide helicopter supported EM survey on the Diagras project and from ground geophysical follow-up. The Class "B" targets are the 25 known kimberlites on the property.

The historic exploration tended to assume these kimberlites were classic single event, vertical, "carrot shaped" pipe like bodies as dictated by the kimberlite model. However, experience in the Lac de Gras kimberlite field, (an 80km by 120km ellipse containing >200 kimberlites of similar age), has demonstrated that many of the kimberlites are not single, but multiple eruptive events with multiple lobes forming complexes, with complex shapes. The Class B style target has been the focus of our exploration to date and in 2021 it led to the discovery of 5 new kimberlites, including Sequoia, confirming the concept.

In this case the Arbutus kimberlite was discovered by drilling a distinct magnetic low SE of the known Finlay Kimberlite. Early description of the kimberlite is that it is a Coherent kimberlite with coarse sub centimeter olivines and abundant diamond and mantle indicator minerals and example of which is shown in Figure 2. From the drill intercepts and geophysics the pipe appears about 200m long and 25m wide.

Figure 1: Ground Magnetic gridded image showing the anomaly of Finlay, dark blue and Arbutus a magnetic low SE of Finlay (also dark Blue). Several drill holes were completed historically into Finlay, by De Beers in the 1990's. The black dot is the collar of the De Beers holes, the Orange dot is the collar location of the JV's Holes 210m distant.

Figure 2: An example of the Coherent kimberlite recovered from drilling the Arbutus Kimberlite, note the Chrome Diopside (Green) and Garnet (Burgundy Red) prominent indicator minerals, with abundant coarse olivine in a dark matrix.

Jack Pine Kimberlite

• The Jack Pine kimberlite is one of the largest kimberlite complexes in the Lac de Gras diamond field (over 1.5km in its longest dimension)
• The geophysical methods (ground gravity, EM and magnetics) highlighted obvious magnetic kimberlite phases drilled by previous explorers
  • Also successfully definied a new kimberlite-like geophysical expression believed to have not yet been evaluated by drilling according to available public domain records.
  • Previous drilling in the Jack Pine kimberlite complex has demonstrated it is significantly diamond bearing.

• Ground geophysical work has revealed a magnetic low anomaly, a gravity anomaly and a linear EM anomaly interpreted to be over 600 meters in length.
• Data in the public domain indicates that only one drill hole tested this kimberlite leaving potentially untested kimberlite(s) and/or phases.

 HL-02 Kimberlite:

Figure Above. Top left Ohm Mapper results for the HL-02 Kimberlite. Colour image, EM data Magenta is less resistive. Contours Magnetic data. Dotted outlines depict drill target, Top Right Gravity Image, with Magnetic Contours, and bottom Left Magnetic image with EM Contours.

• At the HL02 Kimberlite DeBeers drilled 2 long inclined holes one intersecting only a few meters of hypabyssal type kimberlite at the end of the hole. 
• It appears from this work that there is an untested gravity and EM target that breaks a diabase dyke.
• This is a classic compelling kimberlite drill target. 

 

TIMANTTI FINLAND – A NEW KIMBERLITE FIELD

Arctic completed a 600 km2 UAV magnetic survey this Summer, adding to our Winter ground Mag

Greenstones belts and gabbro sills dominate the image as long linear Mag highs

Some of the new targets highlighted, arrows, kimberlite targets Kimberlite targets in the quite quartzites tend to stand out

Wolfpack Targets - Timantti Finland

• 38 New untested drill targets for 2020.
• Red arrows point to the top priority targets.
• As little as 1-3 m overburden.
• The Wolves seem to form an East-West trend (Yellow Arrows).