Source:
p. 71
The Lac Guéret property covers an area of 8,570 hectares, all of which are 100% in the interest of Mason Graphite with the claims (162 claims) in good standing until July 17, 2019.
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Summary:
The regional geology includes the most southwesterly of several elongate anticlinoria of Gagnon Group metasediments that include the traditional iron formation stratigraphy of the Wabush-MontReed iron district. These units are metamorphosed equivalents of the Labrador Trough (New Québec Orogen) sediments that occur around Schefferville, Québec and north. The southwest Manicouagan Anticlinorium shows a core of Denault Formation (Fm) dolomitic marble which lies beneath the Sokoman iron formation level, deposited on a platform of Katsao Fm pelitic metasediments. The Sokoman Fm (iron chemical sediments) overly the Denault Fm. Quartz-rich non/low oxide, iron-oxide, and silicate facies of the Sokoman Fm form infolded synclines and anticlines. The Sokoman Fm quartzite non-oxide facies overlies the iron oxide-bearing facies. The top of the Sokoman Fm has a diachronous, transitional contact with the overlying Menihek Fm pelitic sediments.
Graphitic metasediments are concentrated in the Lac Guéret Member above the Sokoman Fm iron deposits. Graphite also occurs in minor amounts in the adjoining Sokoman Fm near the contact, but most of the potentially economic graphite lies within the Member. This relationship is common in the district with examples at Lac Knife (QC) and the Mart Lake graphite showing at the Kami iron deposit (Labrador City, NL). Graphite formed as beds within clastic sedimentary basinal deposition under anoxic conditions that preserved the organic carbon and ........
Summary:
The mining method selected for the Project is a conventional open pit, truck and shovel, drill and blast operation. Vegetation, topsoil and overburden will be stripped and stockpiled for future reclamation use. The ore and waste rock will be mined with 10 m high benches, drilled, blasted and loaded into articulated haul trucks with a hydraulic excavator.
The mine will be operated by a 100% owner-operated fleet, seven days per week and ten hours per day. The operations will run for ten months of the year with a two-month shutdown from April to May during the spring thaw season; if required mining operations will be conducted during the spring season.
The ore will be hauled to the run of mine (ROM) pad located within one km of the pit and dumped directly into the hopper of the primary crusher. The ore will then be discharged by a conveyor belt into the crushed ore stockpile. A front end wheel loader will load the ore haulage trucks which will transport the ore from the mine site to the plant site in Baie-Comeau. The transportation of the ore from the mine to Baie-Comeau will be done during the ten-month period, seven days per week; if required, transport during the thaw period will be possible but at reduced truck capacity.
The overburden and waste rock that will be mined during the 25-year operation will be placed in three stockpiles (one for overburden and two for waste rock). The piles will be located to the southeast of the open pit, outside ........
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Flow Sheet:
Summary:
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Projected Production:
| Commodity | Units | Avg. Annual | LOM |
|
Graphite
|
kt
| 52 | 1,297 |
All production numbers are expressed as concentrate.
Operational Metrics:
| Metrics | |
|
Stripping / waste ratio
| 0.8 * |
|
Waste tonnes, LOM
| 3,870 kt * |
|
Ore tonnes mined, LOM
| 4,741 kt * |
|
Total tonnes mined, LOM
| 8,611 kt * |
|
Annual processing rate
| 189,620 t * |
|
Annual ore mining rate
| 190,000 t * |
* According to 2018 study.
Reserves at December 5, 2018:
The Mineral Reserves cut-off grade is 6% Cg.
The Mineral Resources of the Lac Guéret deposit were validated in 2018 by GMG and re-estimated with the updated economical parameters and using a cut-off grade of 5.75% Cg as a base case scenario and a fixed specific gravity of 2.9 t/m3 to convert volume into tonnage.
| Category | Tonnage | Commodity | Grade | Contained Graphite |
|
Proven
|
2,003,000 t
|
Graphite
|
25.1 %
|
502,000 t
|
|
Probable
|
2,738,000 t
|
Graphite
|
29.8 %
|
815,000 t
|
|
Proven & Probable
|
4,741,000 t
|
Graphite
|
27.8 %
|
1,317,000 t
|
|
Measured
|
19,021,000 t
|
Graphite
|
17.9 %
|
3,404,000 t
|
|
Indicated
|
46,519,000 t
|
Graphite
|
16.9 %
|
7,862,000 t
|
|
Measured & Indicated
|
65,540,000 t
|
Graphite
|
17.2 %
|
11,266,000 t
|
|
Inferred
|
17,613,000 t
|
Graphite
|
17.3 %
|
3,404,000 t
|
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