Overview
Stage | Preliminary Economic Assessment |
Mine Type | Open Pit |
Commodities |
|
Mining Method |
|
Mine Life | 10 years (as of Jan 1, 2017) |
Source:
p. 16,17
Company | Interest | Ownership |
Calibre Mining Corp.
|
7.5 %
|
Indirect
|
MarkX Ventures Inc.
|
17.5 %
|
Indirect
|
Century Mining S.A.
|
75 %
|
Indirect
|
In October 2018, Calibre and Rosita Mining Corporation entered into a joint venture agreement with Century Mining S.A., for further development and advancement of the project. In consideration therewith, a new Nicaraguan joint venture entity, “Santa Rita Mining” was formed, in which Century will acquire a 75% interest and Rosita and Calibre will acquire a 17.5% and 7.5% equity interests, respectively.
On June 17, 2021, King Global Ventures Inc. (formerly Rosita Mining Corporation) entered into an agreement with an arms-length party to sell its wholly owned subsidiary, Alder Resources Ltd., which holds 100% interest in ALR Nicaragua S.A., the Company’s investment in Santa Rita, for proceeds of $30,000 and 400,000 common shares of MarkX Ventures Inc., a private company incorporated in British Columbia, with a fair value of $20,000.
Contractors
- Subscription is required.
Summary:
Deposit Types
The main types of deposit on the Rosita property are Cu-Au-Ag skarn at Santa Rita, R-13 and Tigre Negro, Fe-Cu-Au skarn at Magnetite Hill and Cu-Au-Ag porphyry at Bambana(Tipispan and T3 area). The skarn deposits are characterized by calc-silicate metasomatism, retrograde alteration and silicification. The porphyry copper mineralization at Bambana is characterized by propylitic, silicic and potassic alteration.
Skarn deposits form through the physical and chemical reaction between igneous rocks intruded into calcareous sedimentary rocks.They occur adjacent to (exo-skarn) or within (endo-skarn) an intrusive body. Emplacement of the intrusive is controlled largely by transfer structures in the back-arcbasin as well as splays along arc parallel structures in the magmatic arc environment. Alteration zoneis controlled by the temperature gradient and is overprinted by metasomatic and retrograde alteration. Mineralization is commonly vertically zoned from chalcopyrite-magnetite to chalcopyrite-bornite-gold-pyrite to pyrite-chalcopyrite. The copper-gold-silver deposit at the Santa Rita pit is examples of skarn mineralization.
The targets of this resource study are tailings and six historical low grade stockpiles around the Santa Rita pit.Each stockpile (North, Northeast, East, South and Southwest) was named based on the direction to the Santa Rita Pit. RST believes the stockpiles were originally derived from Santa Rita pit.
Based o ........

Summary:
Rosita is proposing to reclaim the Stockpile and tailings at Santa Rita with the use of local construction contractors. Conventional earth moving equipment such as hydraulic excavators or front end loaders will be utilized. The nature of the “loose” stockpile and tailings mineralized material does not require any drilling and blasting activities. The reclaimed material can be transported to the mobile crushing plant via articulated or rigid frame haul trucks.
The location of the stockpiles and tailings are in close proximity to the mobile crushing plant, and proposed process facility via existing roads in and around the area. The project does not require any selectivity or detailed grade control however, selective reclamation of specific stockpiles will take place. It is anticipated that the higher grade North Stockpile will be reclaimed initially and this has been addressed in the early year cash flow presented.
The bulk of the resources from each stockpile will be focussed on the indicated resources. However, where inferred resources are at the edges of stockpile they will be excavated first and thus inferred and indicated resources will be mixed in the feed to the treatment plant.
From the sequence of mining planned, the grades used for the cash flow statement have been defined as:
- First 5 years: 0.65 g/t Au; 10.0 g/t Ag (for the mill) 8.0 g/t Ag (for the heap leach); 0.80% Cu;
- Second 5 years;0.47 g/t Au; 7.79 g ........

Source:

- subscription is required.
Flow Sheet:
Summary:

- subscription is required.
Operational Metrics:
Metrics | |
Plant annual capacity
| 720 kt * |
Daily processing capacity
| 2,300 t * |
Annual ore mining rate
| 730 kt * |
Processing scale, tpd
| 2,300 t |
* According to 2017 study.
Reserves at March 6, 2017:
The Au cut-off grade for the resource estimate 0.3 g/t.
Category | OreType | Tonnage | Commodity | Grade | Contained Metal |
Indicated
|
Stockpiles
|
6,460 kt
|
Gold
|
0.47 g/t
|
96.7 koz
|
Indicated
|
Stockpiles
|
6,460 kt
|
Silver
|
7.32 g/t
|
1,521 koz
|
Indicated
|
Stockpiles
|
6,460 kt
|
Copper
|
0.5 %
|
32.2 kt
|
Inferred
|
Stockpiles
|
3,437 kt
|
Gold
|
0.46 g/t
|
50.3 koz
|
Inferred
|
Tailings
|
1,956 kt
|
Gold
|
0.56 g/t
|
35.2 koz
|
Inferred
|
Stockpiles
|
3,437 kt
|
Silver
|
8.66 g/t
|
957.5 koz
|
Inferred
|
Tailings
|
1,956 kt
|
Silver
|
9.65 g/t
|
607 koz
|
Inferred
|
Stockpiles
|
3,437 kt
|
Copper
|
0.61 %
|
21 kt
|
Inferred
|
Tailings
|
1,956 kt
|
Copper
|
0.21 %
|
4 kt
|
Mine Management:
Job Title | Name | Profile | Ref. Date |
.......................
|
.......................
|
|
Mar 6, 2017
|
- Subscription is required.
Corporate Filings & Presentations:
- Subscription is required.
- Subscription is required.