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Bulgaria
Ada Tepe Mine

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 Location:
3 km S from Krumovgrad, Bulgaria

  Address:
1 Hristo Botev St. District of Kardzhali
Krumovgrad
Bulgaria
6900
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Fax+359-0-3641-7093
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life2026
Pre-stripping and stockpiling of ore started in July 2018, followed by first concentrate production in March 2019 and ramp up to commercial production levels in June 2019.
Latest NewsDundee Precious Metals Announces Life of Mine Plan with Additional Production and Updated Mineral Resource and Mineral Reserve Estimate for Ada Tepe     January 12, 2023


Owners

Source: p. 7
CompanyInterestOwnership
Dundee Precious Metals Inc. 100 % Indirect
Dundee Precious Metals Krumovgrad EAD (operator) 100 % Direct
Dundee Precious Metals Krumovgrad EAD, which produces a gold concentrate containing gold and silver, from its Ada Tepe mine located in south eastern Bulgaria, near the town of Krumovgrad, Bulgaria, is a wholly owned subsidiary of Dundee Precious Metals Inc.

Contractors

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Deposit Type

  • Epithermal
  • Vein / narrow vein


Summary:

The Ada Tepe deposit is a prime example of a high-level epithermal gold-silver deposit, formed during the Neogene within the Southern Rhodope tectonic zone.

The Ada Tepe deposit is a low-sulphidation adularia-sericite gold-silver epithermal deposit located within Palaeocene sedimentary rocks overlying the north-eastern end of the Kessebir core complex.

The gold precipitates predominantly in the veins. The Ada Tepe deposit shows a multiphase history of formation with several brecciation and vein emplacement events resulting in complex overprinting infill stages and crosscutting relationships between the veins.

Two major styles of mineralisation are apparent at Ada Tepe:
• Initial stage of mineralisation hosted by a massive, shallow-dipping (15° north) siliceous body forming the hangingwall to the detachment and defining the contact between the core complex and overlying sedimentary rocks. This mineralisation is termed the “Wall Zone” by local geologists and displays multiple stages of veining and brecciation.

• Second phase of mineralisation represented by steep dipping veins that exhibit textures indicative of formation within an epithermal environment. These veins have a predominant east-west strike, crosscut the shallow-dipping siliceous Wall Zone mineralisation, and extend upwards into the sedimentary breccia unit above the Wall Zone. This phase of mineralisation has been locally termed the “Upper Zone”.

The ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The mining methods used at the Ada Tepe pit are conventional excavator and truck methods. Drilling and blasting of ore and waste is conducted over bench heights of 5 m and explosives are delivered to the hole by the drill and blast contractor. Hydraulic excavators are used to achieve good selectivity in conjunction with good blasting practice and mine to a 2.5 m flitch height. Ore and waste are generally loaded to 40-tonne capacity off-highway haul trucks to a ROM stockpile or to the IMWF.

All the production fleet is principally sourced from Caterpillar. In addition to the main equipment units there are graders and water trucks as well as various support and service equipment in use. Mining operations are conducted in two 8.0-hour shifts per day. The mining production rate is about 3 Mtpa total material.

Pit Design
The selected economic pit shell was used to drive the pit design work. The pit design was checked against the Whittle shells to ensure they match reasonably well. The design difference is minimal with less than 3% loss in ore and less than 1% change in total tonnage. This is considered reasonable considering the requirement for ramps and other practical mining considerations.

The ultimate and phase pits were designed following the slope geotechnical criteria and selected pit shell. Four phased pushbacks were used for the LOM plan. All pits were designed on a 5 m mining height. The ultimate pit was designed with 15 m bench he ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Production:

CommodityProductUnits2022202120202019
Gold Metal in concentrate koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Concentrate kt  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Metal in concentrate oz  ......  Subscription required  ......  Subscription required  ......  Subscription required
^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics20222021202020192018
Tonnes processed  ......  Subscription required  ......  Subscription required  ......  Subscription required470,545 t
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required430,384 t157,834 t
Annual processing capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required840,000 t
Annual mining rate  ......  Subscription required  ......  Subscription required  ......  Subscription required
^ Guidance / Forecast.
Subscription required - Subscription is required.

Reserves at December 31, 2021:
Mineral Reserves for Ada Tepe are based on a gold cut-off grade of 0.6 g/t for the Upper Zone and Overburden and of 0.8 g/t for the Wall calculated using metal prices of $1,250/oz Au, $17/oz Ag.

Mineral Resources for Ada Tepe are based on a gold cut-off grade of 0.6 g/t for the Upper Zone and Overburden and of 0.8 g/t for the Wall calculated using metal prices of $1,400/oz Au, $17/oz Ag.

CategoryTonnage CommodityGradeContained Metal
Proven 1.7 Mt Gold 5.62 g/t 0.307 M oz
Proven 1.7 Mt Silver 3.68 g/t 0.201 M oz
Probable 1.4 Mt Gold 3.31 g/t 0.149 M oz
Probable 1.4 Mt Silver 2.27 g/t 0.102 M oz
Proven & Probable 3 Mt Gold 4.72 g/t 0.456 M oz
Proven & Probable 3 Mt Silver 3.14 g/t 0.303 M oz
Inferred 0.2 Mt Gold 1.63 g/t 0.01 M oz
Inferred 0.2 Mt Silver 1.32 g/t 0.008 M oz

Commodity Production Costs:

CommodityUnits2022202120202019
Total cash costs Gold USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†
Total cash costs (sold) Gold USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†
All-in sustaining costs (sold) Gold USD  ......  Subscription required ^†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†
^ Guidance / Forecast.
† Net of By-Product.
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Operating Costs:

Units202120202019
Total operating costs ($/t milled) USD 52.240.149.3

Financials:

Units2022202120202019
Capital expenditures (planned) M USD  ......  Subscription required
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Growth Capital M USD  ......  Subscription required  ......  Subscription required
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
After-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
EBITDA M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required



Heavy Mobile Equipment as of July 31, 2020:
HME TypeModelQuantityLeased or
Contractor
Dozer (crawler) ....................... Subscription required ....................... Subscription required
Dozer (crawler) ....................... Subscription required ....................... Subscription required
Drill ....................... Subscription required ....................... Subscription required Leased
Excavator ....................... Subscription required ....................... Subscription required
Excavator ....................... Subscription required ....................... Subscription required
Grader ....................... Subscription required ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Loader (FEL) ....................... Subscription required ....................... Subscription required
Truck (dump) ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required May 30, 2022
....................... Subscription required ....................... Subscription required Subscription required May 30, 2022
....................... Subscription required ....................... Subscription required Subscription required May 30, 2022
....................... Subscription required ....................... Subscription required Subscription required May 30, 2022
....................... Subscription required ....................... Subscription required Subscription required May 30, 2022
....................... Subscription required ....................... Subscription required Subscription required May 30, 2022
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2021
Subscription required 2020
Subscription required 2019
Subscription required 2018

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Information Form 2018
Annual Report 2018
Annual Information Form 2017
Technical Report 2017
Corporate Presentation 2016
Technical Report 2014
Subscription required - Subscription is required.

News:

NewsDate
Dundee Precious Metals Announces Life of Mine Plan with Additional Production and Updated Mineral Resource and Mineral Reserve Estimate for Ada Tepe January 12, 2023

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