Overview
| Stage | Production |
| Mine Type | Underground |
| Commodities |
|
| Mining Method |
- Sub-level open stoping (SLOS)
- Shrinkage stoping
- Longhole stoping
|
| Production Start | ...  |
The Palito and São Chico operations comprise a single cash generating units (“CGU’’), being the Palito Complex.
The mine life will be based on the judgement of management of that portion of Measured, Indicated, and Inferred Resources that can be recovered on the basis that, given the nature of the Group’s orebodies, the mineral reserves (that portion of the mineral resource that has been proven by independent study to have economic viability) comprises a small part of the total mineral resource of the Group’s orebodies and does not reflect management’s view of the true life of the orebody. |
Source:
p. 101,140
| Company | Interest | Ownership |
|
Serabi Gold Plc.
|
100 %
|
Indirect
|
|
Serabi Mineração S.A.
(operator)
|
100 %
|
Direct
|
Serabi is the operator and owns 100% of the Palito and Sao Chico Mines
Serabi Mineraçao SA - containing the Palito and São Chico gold mines.
Contractors
- Subscription is required.
Deposit Type
- Intrusion related
- Mesothermal
- Vein / narrow vein
Summary:
The Palito and São Chico gold deposits are located within the northern portion of the Tapajós-Parima Orogenic Belt (TPOB), a constituent of the Ventauri-Tapajós province of the Guaporé Shield. Formed between 2.5 and 1.8 Ga, the TPOB is a northwest oriented magmatic arc bound to the north by the Amazonian Basin and to the south by the Cachimbo Graben. Within the TPOB, the Tapajós Gold Province hosts numerous primary gold deposits over an area of approximately 300 kilometers (km) by 350 km.
Mineralization at the Palito and São Chico deposits is hosted in granite and granodiorite of the Paráuari suite. Mineralization at the Palito Mine is hosted within three granitoids and is intimately associated with northwest-southeast vertical to sub-vertical mesothermal quartz-chalcopyrite-pyrite veins and pyrite disseminations filling the brittle-ductile fault sets. At Palito, the nature of sulfide mineralization varies along the strike and plunge extents of the deposit. Pyrite and chalcopyrite dominate in the granites, whereas pyrrhotite and pyrite with lesser chalcopyrite are found in the granodiorite. Within the granodiorites, the pyrrhotite-pyrite sulfides tend to be lower grade due to lower chalcopyrite content.
The Main Vein at São Chico strikes in a broadly west-northwest direction, dips steeply to the south, and ranges from approximately 1.0 to 3.9 meters (m) in apparent width. Mineralization extends approximately 140 m down dip and approximately 100 m along s ........
Mining Methods
- Sub-level open stoping (SLOS)
- Shrinkage stoping
- Longhole stoping
Summary:
Palito Mine
Mining of the narrow, near-vertical gold veins at the Palito Mine is undertaken using the shrinkage stoping method.
Shrinkage stoping blocks are defined on the lower level by horizontal development mining along the vein, and a vertical raise is then driven to the top of the stoping block and ladders are installed so that men and materials can access the stope on each subsequent lift as mining advances upward.
Shrinkage stope mining progresses vertically beginning with the drilling of sub-vertical holes using hand-held pneumatic drills (stopers). The drill holes are loaded with explosives and the blasted ore is left in the stope except to the extent it is necessary to draw down the rock to leave an adequate distance between the working floor and the back. The ore left in the stope supports the walls and no installed ground support is typically required. Serabi extracts the broken ore via a series of crosscuts that are driven in waste from a footwall access. After a stope is mined to its full height, load-haul-dump (LHD) units are used to muck the remaining ore from the stope. The LHD units load haul trucks, which then transport the broken ore to the surface.
São Chico Mine
The São Chico Mine is high grade, narrow vein longhole stoping operation. Mining of the steeply dipping vein is by longitudinal longhole stoping methods using sublevels that are spaced at a nominal 15 m. Because structural backfill is not available and ........
Source:
- subscription is required.
Flow Sheet:
Summary:
- subscription is required.
Reserves at December 31, 2021:
Mineral Reserves are reported at a cut-off grade of 3.70 g/t gold for the Palito Mine and at a cut-off grade of 3.45 g/t gold for the Sao Chico Mine.
Mineral Resources are reported at a cut-off grade of 3.10 g/t gold for the Palito Mine and at a cut-off grade of 2.85 g/t gold for the Sao Chico Mine.
| Category | Tonnage | Commodity | Grade | Contained Metal |
|
Proven
|
55,628 t
|
Gold
|
6.12 g/t
|
10,950 oz
|
|
Probable
|
243,614 t
|
Gold
|
7.2 g/t
|
56,393 oz
|
|
Proven & Probable
|
299,243 t
|
Gold
|
7 g/t
|
67,344 oz
|
|
Measured
|
48,822 t
|
Gold
|
6.98 g/t
|
10,950 oz
|
|
Indicated
|
1,453,690 t
|
Gold
|
5.17 g/t
|
241,544 oz
|
|
Measured & Indicated
|
1,502,512 t
|
Gold
|
5.23 g/t
|
252,494 oz
|
|
Inferred
|
1,429,665 t
|
Gold
|
4.83 g/t
|
221,929 oz
|
Water is an abundant resource in the area, and the current water supply system is not a limiting factor for operations at the Palito Mine or the São Chico Mine.
The operation has a water supply system consisting of dams that contain water from the following sources:
- Mine water that is pumped from the underground workings;
- Recycled process water after neutralization and decantation; and
- Rain water.
The total process water requirement is 40 m3/hr, of which 80% is recycled from the tailings disposal areas (32 m3/hr) and 20% is from the fresh water dam (8 m3/hr). Fresh drinkable water for use in the camp is supplied by conventional water wells. The total fresh water consumption is approximately 60 m3/day.
- Subscription is required.