Overview
Stage | Construction |
Mine Type | Open Pit & Underground |
Commodities |
|
Mining Method |
- Truck & Shovel / Loader
- Longitudinal retreat
|
Mine Life | 17 years (as of Jan 1, 2013) |
August 24, 2018 - A unit of Sichuan Road & Bridge Co. will start producing copper, zinc, gold and silver at a mine in Eritrea by the first quarter of 2019, helping diversify the country’s agrarian economy, a mines ministry official said. |
Source:
On April 26, 2016, Sunridge Gold Corp. completed the sale of its 60% interest in Asmara Mining Share Company (“AMSC”) to Sichuan Road & Bridge Mining Investment Development Corp. Ltd. (“SRBM”).
The Asmara Project is held by Asmara Mining Share Company (“AMSC”) of which Sunridge Gold Corp. owned 60% of the shares and Eritrean National Mining Corporation (“ENAMCO”) owns 40% of the shares, with 30% being a participating interest purchased from Sunridge Gold Corp. and 10% being a carried interest that ENAMCO was entitled to by law.
Contractors
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Summary:
The base metal deposits of SGC in the Asmara Project (Emba Derho and Adi Nefas) and Debarwa are examples of volcanogenic massive sulphide (VMS) deposits located in the Neoproterozoic Arabian-Nubian Shield (ANS). The ANS represents a composite granitoid-greenstone belt terrain that straddles the Red Sea and covers much of Eritrea, parts of Egypt, Sudan and Ethiopia, and the western part of Saudi Arabia.
The Gupo gold deposit shares similarities with other shear-hosted quartz-vein related gold deposits that are formed in Precambrian terrains and subsequently modified by tectonic events and nearsurface weathering effects.
All deposits have been subjected to near surface weathering effects such that the base metal VMS deposits exhibit oxidation and remobilization of metals. Typically the surface manifestation of the deposit is a gossan overlying zones of depletion or enrichment in oxide, supergene and transition zones. Primary sulphides are developed at depth.
Mining Methods
- Truck & Shovel / Loader
- Longitudinal retreat
Summary:
Emba Derho, Debarwa and Gupo will be mined using conventional open pit truck shovel techniques. The mining rate at Emba Derho is nominally 20 Mtpa total ore and waste. At Debarwa the mining rate peaks at 12 Mtpa, and at Gupo 1 Mtpa.
Adi Nefas is an underground mine; it will be mined using a professional international mining
contractor. The underground mining method is long-hole bench retreat. Mine access is via a single decline, which also serves as an intake
airway. Each level is accessed from the decline via a level access drive, which intersects the orebody in the approximate centre along the orebody strike. From the level access, strike drives are developed along the ore to the north and south. Between levels stopes are extracted on retreat back to the central decline. All stopes will be waste-filled after extraction. Peak ore production at Adi Nefas is approximately 400 Ktpa.
Flow Sheet:
Summary:
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Projected Production:
Commodity | Product | Units | LOM |
Copper
|
Metal in concentrate
|
M lbs
| 841 |
Zinc
|
Metal in concentrate
|
M lbs
| ...... |
Gold
|
Metal in doré
|
koz
| ...... |
Gold
|
Metal in concentrate
|
koz
| ...... |
Silver
|
Metal in concentrate
|
koz
| ...... |
Silver
|
Metal in doré
|
koz
| ...... |
* According to 2013 study.
Reserves at December 31, 2013:
Category | Tonnage | Commodity |
Proven
|
4,861 kt
|
Copper
|
Proven
|
4,861 kt
|
Zinc
|
Proven
|
4,861 kt
|
Gold
|
Proven
|
4,861 kt
|
Silver
|
Probable
|
51,723 kt
|
Copper
|
Probable
|
51,723 kt
|
Zinc
|
Probable
|
51,723 kt
|
Gold
|
Probable
|
51,723 kt
|
Silver
|
Proven & Probable
|
56,584 kt
|
Copper
|
Proven & Probable
|
56,584 kt
|
Zinc
|
Proven & Probable
|
56,584 kt
|
Gold
|
Proven & Probable
|
56,584 kt
|
Silver
|
Measured
|
434 kt
|
Copper
|
Measured
|
434 kt
|
Zinc
|
Measured
|
434 kt
|
Gold
|
Measured
|
434 kt
|
Silver
|
Indicated
|
2,878 kt
|
Copper
|
Indicated
|
2,878 kt
|
Zinc
|
Indicated
|
2,878 kt
|
Gold
|
Indicated
|
2,878 kt
|
Silver
|
Measured & Indicated
|
3,312 kt
|
Copper
|
Measured & Indicated
|
3,312 kt
|
Zinc
|
Measured & Indicated
|
3,312 kt
|
Gold
|
Measured & Indicated
|
3,312 kt
|
Silver
|
Inferred
|
681 kt
|
Copper
|
Inferred
|
681 kt
|
Zinc
|
Inferred
|
681 kt
|
Gold
|
Inferred
|
681 kt
|
Silver
|
Mine Management:
Job Title | Name | Profile | Ref. Date |
.......................
|
.......................
|
|
Feb 19, 2024
|
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