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Saudi Arabia
Ad Duwayhi Mine

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 Location:
120 km NE from Ranyah, Saudi Arabia

  Regional Office:
Building number 395 Abi Bakr Asseddiq Road, South Exit 6, North Ring Road
P.O. Box 68861
Riyadh
Saudi Arabia
11537
Phone  ...  Subscription required
Fax+966-(0)-11-874-8300
EmailEmail
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life2030


Owners

Source: p. 19,48
CompanyInterestOwnership
Maaden Saudi Arabian Mining Co. 100 % Indirect
Maaden Gold and Base Metals Company (operator) 100 % Direct
Ma’aden Gold and Base Metals company (MGBM) is a wholly owned subsidiary of Maaden Saudi Arabian Mining Co. (Ma’aden), operates five gold mines, i.e. Mahd Ad-Dahab, Al-Amar, Bulghah, As-Suq and Ad-Duwayhi and a processing plant at Sukhaybarat.

Contractors

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Deposit Type

  • Vein / narrow vein
  • Hydrothermal


Summary:

Ad Duwayhi lies within the Afif composite terrain in the central Arabian Shield. The Afif terrain consists of a complex assemblage of volcanic arc sequences and a continental microplate that are overlain by successor-basin volcano-sedimentary sequences (Bani Ghayy and Murdama Groups). All these rocks were intruded by post-tectonic granitic rocks.

The deposit lies at the southern end of a zone of Pre-Cambrian volcano-sedimentary rock, which have been overprinted by greenschist facies metamorphism. The deposit is located to the north of a fault bounded belt of folded meta- sediments and plutonic rocks. A granodiorite body lies to the east of the deposit, with the deposit stratigraphy cut by multiple intrusive dykes and sills of dolerite, rhyolite, porphyritic granite and a polymict breccia pipe.

The main mineralisation is associated with a curved thrust structure with an average strike of 045° and dip of 45° southeast, curving from a northerly direction in the southwest to an easterly direction in the northeast. There are other more minor mineralised structures on different trends.

Hydrothermal alteration is common across the deposit area comprising silicification (everpresent), quartz-sericite-pyrite, potassic and propylitic. The quartz-sericite-pyrite alteration is most closely associated with the gold mineralisation.

The main mineralisation is structurally controlled by the curved thrust structure, with a thrust zone typically betw ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Mine access to the open-pits is via a single haul road developed as part of the starter pit and the final pit and extending from surface to a depth of 145m below surface. The open-pit is designed with the following parameters: 20m wide ramps with a gradient of 10% and overall slope angles ranging from 45° to 58°. Other final design aspects are: bench heights of 15m; batter angles of 75°; and berm widths of 8m.

Mining methods comprise standard drill-blast-load-haul. Mining occurs by drilling and blasting 5m high sub-benches with 120mm to 200mm blast holes. Hydraulic excavators with 8.4m3 bucket capacities load blasted ore and 10.0m3 bucket capacities load waste into 80t rear-dump haul trucks. Additional service equipment comprise graders, tracked dozers, water trucks and general service vehicles.


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnits20202019201820172016
Gold oz  ......  Subscription required  ......  Subscription required274,519163,10456,314
All production numbers are expressed as metal in doré.
Subscription required - Subscription is required.

Operational Metrics:

Metrics20212019201820172016
Annual processing capacity  ......  Subscription required2.3 Mt2 Mt
Ore tonnes mined  ......  Subscription required5,095,303 t4,489,793 t
Waste  ......  Subscription required16,863,941 t16,173,096 t
Tonnes milled  ......  Subscription required2,071,125 t1,311,615 t
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Reserves at December 31, 2020:

CategoryTonnage CommodityGradeContained MetalRecoverable Metal
Proven 2.4 Mt Gold 3.3 g/t
Probable 18.9 Mt Gold 1.4 g/t
Proven & Probable 21.3 Mt Gold 1.7 g/t 1.12 M oz 1.07 M oz
Measured 2.2 Mt Gold 4.3 g/t
Indicated 17.6 Mt Gold 1.5 g/t
Inferred 8.9 Mt Gold 1.7 g/t
Total Resource 28.7 Mt Gold 1.8 g/t 1.68 M oz

Financials:

Units20172016
Revenue M SAR 777.7   264.8  



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 24, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 24, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 24, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2018

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
Annual Report 2018
Financial Review 2018
Annual Report 2017
Annual Report 2016
Other 2007
Subscription required - Subscription is required.

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