Walker Mine: Buckingham Township
All information pertaining to mineral resources herewith presented are historical in nature and while relevant, the information was obtained before the implementation of National Instrument 43-101 reporting standards. No historical estimate should be relied upon until it can be confirmed by the Company.
The Walker Mine is a past graphite producer with about 816 tons of lump graphite extracted from the mine between 1876 and 1920. The property consists of 4 claims covering the past mine and 11 claims covering interesting geological context for more graphite mineralization in the region around the deposit.
22 inches wide ore -high density grade 89% Cg- Image from October 8th , 2013 site visit
No mining restrictions exist over those claims. The property covers 9.02 square km of land and is located 40 km north-east of Ottawa. Main roads are located 2 km away from the Walker Mine. A secondary or private road runs up to the property site which allows for easy access. The regional claims are also easily accessible via a main road.
Most Recent Results
Final Airborne Results: Saint Jean Carbon Receives Final Airborne Report October 20, 2016, Oakville, Ontario, Canada- The Company has received the final airborne results of the summer work program and will use the comprehensive data for the fall work program now underway. That includes three bulk samples, beep mapping and drilling.
On the Walker block of claims, three prospective areas have been defined. The first one is extending NE-SW over about one kilometre in the eastern part of the property. This area has been shown to contain several previously mined high-grade graphite veins. The second prospective zone corresponds to the location of the past producing Walker mine. Recent sampling made in part of this area by Saint-Jean Carbon, showed the extension to the SW of the graphite mineralization.
The prospective area #3 consists in a wide corridor of N-S trending conductors usually sub-parallel to the magnetic grain, indicating that sources of interest may be present. However, this area is also mostly found in flat lowlands, where the background TDEM response is rather high, suggesting that conductive overburden is contributing to the response. Therefore, it is not clear if the conductive lineaments are rather related to bedrock conductors or to local thickening of Leda clay deposits. In fact, effects from both types of conductors may very well be present. As a consequence, it is recommended to perform a ground reconnaissance of the conductive area in search for outcrops that could help confirming the sources of anomalies.
Christian Derosier, P.Geo., PhD., is the qualified person (QP) as defined in National Instrument 43-101 and, acting on behalf of Saint Jean Carbon, has reviewed and approved the technical content of this news release.
Saint Jean Carbon Returns Excellent Results from the Summer Work Project: October 12, 2016, Oakville, Ontario, Canada – Grab samples were taken at different locations and sent to the ALS’s laboratory in Val d’Or, Quebec to test the organic carbon content as well as 37 other chemical elements.
Walker Graphite Mine: The Walker graphite mine area is the subject of road construction giving access to some lakes that may be developed for residential housing and camping. At about 250 m west of the old Walker mine, an outcrop has recently been stripped and blasted and does not show the presence of flake graphite mineralization associated to some sulphides (pyrite, pyrrhotite).
M742357: orgC.: 9.83%-This mineralized layers is about 1 m thick and dips at 20-30° to the west. Flakes are disseminated and measure 1-2 mm. The paragneiss is low in carbonate.
M742358: orgC.: 0.63%-This grab sample was taken on an outcrop stripped by a bulldozer and showing the presence of sulphides. No graphite was observed. Pyrite, pyrrhotite and rare chalcopyrite were observed (Cu: 135 ppm).
M742359: orgC.: 15.50%-This composite sample was taken on an old stockpile found at about 30 m south of the old pit. Graphite flakes are disseminated and measure 2-3 mm. The developer will fill this area with large blocks of rocks removed during the road construction.
The 2016 reconnaissance sampling confirmed most of the historical assays and the excellent potential of the Bell-New Quebec area. Saint Jean Carbon is now waiting for the final results of the two helicopter borne surveys which will confirm the lateral extensions of the two old mines and their probable junction. At ALS Global, samples were analyzed for Organic carbon and sulfide sulfur by HCI (25%) leach of carbonates and sulfates, Leco furnace. ME-IR06a. The other chemical elements such as major elements and base metals were determined by ME-MS41 Ultra Trace Aqua Regia ICP –MS.
Christian Derosier, P.Geo., PhD., is the qualified person (QP) as defined in National Instrument 43-101 and, acting on behalf of Saint Jean Carbon, has reviewed and approved the technical content.
Saint Jean Carbon announced the results of two test programs on its lump graphite from the Company's Walker Graphite property in Quebec.
The combination of higher reagent concentration and longer retention times in the fifth test provided the 99.1%Cg best result. This positions the Company's graphite as being fully suited for a wide range of high purity applications. October 15, 2013 Press Release
The fifth test provided the 99.1%Cg best result with he combination of higher reagent concentration and longer retention times
The test work was carried out at Process Research Ortech in Mississauga, Ontario and lab analysis was done at Activation Laboratories Inc. (Actlabs) in Ancaster, Ontario. The goal of the tests was to assess the potential of the Walker lump graphite to be upgraded to 95-99%Cg, which is considered to be commercially marketable levels. The first program consisted of a series of grinding and flotation stages, as well as a caustic leaching process. Material used in the testing was assembled during the Company's sampling program announced in July, 2013 which outlined naturally occurring in situ grades of 89.5%Cg. As the table in our Oct 15th press release indicates, the upgrade process was successful in increasing this to a preliminary upgrade of 97.3%Cg. This is generally considered to be suitable for a wide range of product applications in the graphite sector. Sample material was also weighed before and after testing to assess yield recoveries. As the table also indicates the tests were successful in producing very favourable yields which will be important in maintaining a low cost base when mineral processing the Walker graphite.
|Image above: Exposed vein running Southeast approx 20 feet|
|Image above: Exposed vein on pit wall|
|Image above: Aprox 22 feet of exposed historical vein|
Following this initial test phase, the same material was then subjected to three different variations on the caustic leaching process. In the first test, the leaching retention time was increased from four to six hours. In the second, the caustic concentration was increased to 50% and retention time was again six hours. And in the third, the material was subjected to a regrind stage that decreased particle sizes from 47 microns down to 20 microns. Reagent concentration and retention time was 50% and six hours respectively in the third test as well. As the table below indicates, test results also provided by ActLabs indicate that the Company was successful in increasing the grade up to 99%Cg+ in both the fourth and fifth variations of the simple and cost-effective leaching process. The combination of higher reagent concentration and longer retention times in the fifth test provided the 99.1%Cg best result. As noted above, this positions the Company's graphite as being fully suited for a wide range of high purity applications.
These positive test results are also consistent with the Company's belief that the Walker Graphite property contains economically upgradeable deposits of lump graphite and should therefore be the focus of a full geologic development program in the months ahead. This program commenced in early October with a preliminary beep mapping survey to examine for conductors, and will be followed by an airborne EM survey shortly thereafter. Results from both of these next stages will form the basis for an initial historical NI 43-101 report on Walker, and the Wallingford and St. Jovite properties, also in Quebec, which the Company previously announced that it had entered into a non-arm's length non-binding agreement to acquire. Upon completion of the preliminary report, the Company will develop and define a comprehensive drill program to properly quantify the size and extent of its lump graphite deposits. The drill results and expanded NI 43-101 will be used to prepare a pre and/or full feasibility study as part of the definitive effort to bring the properties into production as soon as possible. The low-cost production opportunity provided by lump graphite will permit the development of an optimized flow sheet that should similarly result in low capital expenditure requirement to process the lump graphite. Mr. Ogilvie noted “the direct results of a low-cost recovery operation and capital budget are one of the principal guiding reasons for our focus on lump graphite, be it in Quebec or Sri Lanka. On that basis we will be making every conceivable effort to move forward rapidly with our plans to establish economically successful production facilities in both locations”.
In a previous site visit the Company’s geologist, Ms. Isabelle Robillard, P. Geo., collected initial composite grab samples
The team directly assessed the visible graphite veins and extracted samples taken along the various veins. The purpose of the program was to assess the potential for high grades encountered across this mineralization region.
The laboratory returned the graphite assay value (89.5% Cg) that is reported here. One of the veins was followed at surface for at least 6 meters along strike and many small mine pits and trenches were found in the immediate area, indicating the presence of more graphite mineralization.”
Based on subsequent analysis conducted by Activation Laboratories Ltd. (Actlabs) of Ancaster, Ontario using the IR process (Leco), the results confirmed the presence of a high quality lump/vein graphite mineralization. Ms. Robillard commented on the results as follows: “Graphite occurrence was observed during recent fieldwork (2013-06-21) from an ancient shallow exploitation pit on an easily accessible part of the property. The old pit and adjacent waste rocks pile exposed at least two sets of intersecting graphite veins, with thickness ranging from 2 to 10 cm. Vein material was sampled and sent to Actlabs in Ancaster.
The mine which operated from 1890 through to 1920 is located in the Central Metasedimentary Belt of the Grenville geological province, between Montreal and Ottawa. The potential for high quality graphite deposits in this area has been actively examined and reported on for many years and the Company is looking forward to commencing work on the property as soon as possible.
A review of the historical records related to Walker provides extremely encouraging comments on its lump graphite potential. One of the most detailed accounts of graphite in this region was a comprehensive book prepared and published for the Canadian Department of Mines in 1907 entitled, “Graphite: Its Properties, Occurrence, Refining and Uses by Fritz Cirkel, M.E. (Mining Engineer)”. In a section devoted to a review of the Walker Mine, Mr. Cirkel provided the following commentary: “The vein filling consists of graphite in by far the larger number of cases; it then is composed of parallel fibers or columnar aggregates, the fibers being vertical to the walls of the vein, as is very common in a number of localities in Ceylon (Sri Lanka) for example. In several cases green apatite and scapolite occur with the graphite. The occurrence of apatite appears to be not uncommon and reminds one of the occurrences of the same mineral in the graphite veins of Ceylon.” These observations are consistent with the Company's own research on Walker and a number of properties located in the same region.
The mineralization at Walker Mine consists of about 25% graphite along with contact metamorphism minerals (Apatite, scapolite, pyroxens, pyrite, titanite, micas and tourmaline). The graphite is present in irregular veins associated with pegmatite and crystaline marble. The graphite appears to correspond to 25% of the mineralized zone, and consist of disseminated flake of unknown size and quality.
There is more than 30 pits reported on the past producing property, which consisted of lots 19 to 21 in ranges 7, 8 and 9. It is to be noted that the current property doesn't include range 9 and part of 8: however the many pits reported should mostly be in the current property (where the Walker Mine was) and these indicate that the mineralization could have an important volume and more extensions on the property.
Regional geology and claim potential
The Walker Mine is classified as a skarn deposit. The contact between a pegmatite intrusion and a marble unit has been mineralized by fluids coming out of the intrusive body. This geological context for graphite mineralization is very common in southern Quebec and is the cause of many graphite occurrences.
Mineralized paragneiss is also present at the Walker Mine. The contact between paragneiss and marbles is mineralized. More of this geological context is also present on the property. This context can usually produce graphitic carbon content up to 15% in the paragneiss close to the contact with the marble. Massive graphite veins are also found in the parageiss at the Walker Mine.
The property is inside the same geological unit as the Walker Mine, consisting of marbles, paragneiss and intrusions (pegmatite). The presence of more marbles and pegmatite is a good target for exploration and discovery for skarn type mineralization and graphite veins.
On the claims just north of the regional claim block, three graphite showings are known and are hosted paragneiss (6% and 8% graphite) and in marble (unknown %). With more than 30 pits located over the Walker Mine region, the multiple graphite occurrences and showings that are found with them are good indicators of the potential of the property for new discoveries and extensions on the Walker mine.
Historical Information on Walker Property
The Walker Mine Property is located in Buckingham Township some 8 kilometers northwest of the small town of Buckingham. The property covers the Walker Mine, a past graphite producer with a total of about 816 tons of graphite extracted from the mine between 1876 and 1920 (Sigeom, Ministère des Ressources Naturelles et de la Faune). It was opened in 1876 by the Dominion of Canada Plumbago Company and W.H. Walker operated the mine from 1886 to 1896 (Maurice 1984). The Buckingham Graphite Company and the Walker Mines took over the operations in 1906, under the management of Mr. Brumell (Cirkel 1907). There are more than 30 pits reported on the past producing property, which consisted of lots 19 to 21 in ranges VII, VIII and IX of the Buckingham Township (Maurice, 1984). The main pit is situated 305 m directly west of a small bridge over a creek. It consists of a tunnel which had been run into the side of the hill for a distance of 45 m. The mill was located on the west side of the creek which gave a constant water supply. It was described in Cirkel Report as measuring 37 m by 22 m and was operated under the so-called Brumell Process. The production was two (2) t. of finished graphite per day (Cirkel 1907). The main pit was connected with the latter by a tramway of 335 m long. There are a waste piles still visible today on the west side of the creek. Other pits are scattered through a wooded area and extend 400 m northeast and at least 800 m southwest of the main opening (Sabina 1986). The graphite, occurs in disseminated flake (up to 25% in the disseminated zone) in gneisses interstratified with marbles. Irregular lump veins associated with pegmatite and marbles are also present and yield high quality graphite. It was estimated that prior to 1920, about 90 t of graphite from veins were extracted on this property (Sigeom, Ministère des Ressources Naturelles et de la Faune). Cirkel (1907) mentions that Graphite specimens from the Walker Mine were exhibited at the 1886 Colonial and Indian Exhibition, London. Some of the pits were found during first exploration phase and exhibited graphite veins which confirmed the presence of high-quality lump vein graphite mineralization.
Cirkel (1907) reported the good potential of the property for graphite extensions. It is reported that there is a main “stripping of 18 feet by 4 feet that show good amount of mineralization. Further north is a stripping 25 feet by 5 feet. The strike of the formation is north 25 degrees east and that formation can be followed for about 500 feet with indications found at intervals. There is no doubt that the conditions on this lot are very encouraging and careful prospecting and stripping should disclose some good ore bodies”.
Maurice, O.D. 1984. Annotated list of occurrences of Industrial Minerals and Building Materials in Quebec. E-SIGEOM system. Online document : DP 184 . http://www.mrnf.gouv.qc.ca/english/mines/geology/geology-databases.jsp . 580 pages.
Cirkel, F. 1907. Graphite : It’s properties, occurrence, refining and uses. Mining division of Canada. Ottawa Department of Mines. 306 pages.
Sabina, A. P. 1986. Rocks & Minerals for the collector; Buckingham – Mont-Laurier – Grenville, Québec; Hawkesbury – Ottawa, Ontario. GSC Misc. Report 33, 90 p.