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Spain
Riotinto Mine

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 Location:
62 km NW from Sevilla, Spain

  Address:
La Dehesa s/n
Minas de Riotinto
Spain
21660
Phone  ...  Subscription required
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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
  • Copper
  • Silver
Mining Method
  • Truck & Shovel / Loader
Processing
  • Crush & Screen plant
  • Flotation
Mine Life14 years (as of Jan 1, 2018)
The Expansion Project was completed in January 2020 and the new processing plant was fully commissioned to operate at the increased annualised rate of 15Mtpa.
Latest NewsAtalaya Mining PLC Announces Q4 2020 Operations Update and 2021 Guidance     January 14, 2021


Owners & OPERATOR

Source: p. 15, 95
CompanyInterestOwnership
Atalaya Mining Plc. 100 % Indirect
Atalaya Riotionto Minera, S.L.U. (operator) 100 % Direct
Atalaya owns 100% of the Proyecto Riotinto copper mine in Huelva.

Deposit Type

  • VMS


Summary:

Riotinto is a typical Volcanogenic Massive Sulfide (VMS) deposit, which are formed in extensional tectonic settings of oceanic seafloor, including spreading ridges subductions zones and arc environments.

According to genetic, rock association and geodynamic setting, the Riotinto volcanic-hosted pyritechalcopyrite mineralization is classified as felsic siliciclastic of Kuroko type. It occurred as lenses of polymetallic massive sulfide that took place at the sea floor in a submarine volcanic environment during the earlier Carboniferous, some 350 million years.

As with most significant VMS mining districts, the IPB is defined by deposit clusters formed within ocean rifts with volcanic centers. The clustering is attributed to a common heat source that caused large-scale sub-seafloor fluid convection systems.

As with most VMS deposits, Riotinto has two morphological and genetic components:
• A mound-shaped to tabular strata bound body composed mainly of massive sulfides.
• An underlying zone with development of a stockwork system of irregular veins filled by quartz and disseminated sulfides that represent the pipes of the volcanic feeders.

Furthermore, Riotinto as well as other VMS deposits, is characterized by extensive zones of hydrothermal alteration as a result of subvolcanic intrusions and fluid convection systems, which define zones of discordant alteration in the immediate footwall and hanging wall of the deposit.

Mineralization is typical of the VMS deposits and occurs as stockwork and massive sulfides. Beside these, oxidation weathering of the primary mineralization has developed gossans and enrichment zones in places.

The stockworks occur as irregular veins, fractures and fissures filled with quartz and sulfides. Two main types of stockworks are identified: 1) pyritic (20% S content) and 2) cupriferous (2% Cu content). The veins become thicker towards the surface. Close to the massive sulfides, most stockworks are made up of veins with lesser amounts of strongly replaced volcanic rocks.

In the Riotinto district mineralization, hydrothermal alteration and secondary replacement (i.e., silicification, chloritization, sericitization and sulfidization) often occur associated to some stockwork zones, and along thin fractures and veins. The alteration zone is characterized by an inner core of chlorite alteration surrounded by an envelope of sericitic alteration, silicification, and pyrite and carbonate alteration. The copper-rich mineralization is most closely associated with the chlorite altered zone.

The massive sulfide consists of lenses of pyrite plus chalcopyrite emplaced on the marine basins surface as a result of black smoker flows. They occur overlaying the felsic volcanic and the stockworks. The primary sulfide mineralization consists mostly of pyrite, with minor chalcopyrite, sphalerite, tetrahedrite and sulfosalts of Sb and As. Chalcopyrite is the predominant copper mineral and mostly occurs within small fractures in the pyrite, on a lesser extent it occurs in isolation.

The massive sulfide deposits are located as dismembered lenses along the axis and the flanks of the anticline close to the Northern and Southern Faults. The principal deposits are San Dionisio-Atalaya, Filón Sur, Filón Norte (Cerro Colorado, Dehesa, Lago and Salomon).

Nowadays, massive sulfides remain only at San Dionisio-Atalaya. At Filon Sur and Filon Norte, all the massive sulfides were mined. In the core ofthe anticline at Cerro Colorado-Salomon open pit, it is believed that the deposits originally formed an almost continuous lens of massive sulfides of about 5 km long, 750m wide and 40m thick, containing more than 500 million tonnes of sulfide mineralization.

Well-developed stockwork mineralization occurs in the volcanic rocks that underlay parts of the massive sulfide ore at all the zones from Filon Norte. Beside the stockwork and the sulfides, secondary mineralization occurs in places. An important volume of sulfides in Cerro Colorado and minor amounts in Corta Atalaya have developed extensive gossans, which were exploited for gold and silver. Gossan and the zone of supergene enrichment are characterized by the occurrence of secondary minerals goethite-limonite and chalcocite-covellite respectively.


Mining Methods

  • Truck & Shovel / Loader


Summary:

Mining has been conducted in the Riotinto area episodically since Roman times, and possibly earlier. The Riotinto Company (a British firm) gained mineral rights and surface ownership in 1874 and operated Riotinto Minera until it began divesting its interests in 1954. Operations in the Cerro Colorado open pit, which is the foundation of the Riotinto Project, began in 1968. The Riotinto mine properties were under the ownership of a local cooperative by the end of the 1990s. Mining activities ended at Cerro Colorado and other smaller operations in 2001 due to deteriorating economic conditions. Mining operations at the Riotinto Project site restarted in June 2015. The Cerro Colorado pit is completely open and in good condition.

Continued exploitation of the Cerro Colorado deposit uses conventional, open pit mining methods. Mining benches are on 10-m vertical intervals. Contractors’ small- to medium-scale mining equipment is used to execute the development plan, including: rock drills capable of drilling 102- to 127-mm-diameter blastholes, hydraulic excavators with bucket capacities of 6 to 14 m3 , off-highway trucks with 55- to 91-t payload capacities, and suitably sized support equipment.


Crushing and Grinding
Crusher / Mill TypeModelSizePowerQuantity
Jaw crusher 250 kW 1
Cone crusher 370 kW 1
SAG mill 23 MW 1
Ball mill 24' x 24' 7600 kW 1
Ball mill 20' x 30' 7600 kW 1
Ball mill 14' x 20' 1840 kW 1
Ball mill 15.5' x 21' 2473 kW 2


Processing

  • Crush & Screen plant
  • Flotation

Flow Sheet: Subscription required

Summary:

The original concentrator, consisting of crushing, grinding, and flotation that was designed and built in the 1960’s and 1970’s, was refurbished to process ores from the mine operations.

The basic engineering design to increase the plant throughput rate from 5 Mtpa (Phase 1) to 9.5 Mtpa (Phase 2) began in March 2015. Commissioning and ramp-up of the Phase 2 plant commenced in March 2016.

Crushing
Three stage crushing is used to produce a nominal minus 22 mm size feed to the grinding circuit. Run of mine ore, at a size of approximately 480 mm, is fed to a 60” x 89” gyratory crusher with a maximum capacity of 3,200 t/h, which reduces the ore to a minus 165 mm product and is stockpiled.

This primary crushed ore is then fed to a secondary and tertiary crushing and screening circuit. Phase 2 incorporated new reclaim feeders and a new double deck primary screen to increase the capacity of the primary crushing circuit.

The crushed ore stockpi ........

Recoveries & Grades:

CommodityParameter2019201820172016
Copper Recovery Rate, %  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Copper Head Grade, % 0.490.490.50.49
Copper Concentrate Grade, %  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Production:

CommodityProductUnits2019201820172016
Copper Payable metal t  ......  Subscription required  ......  Subscription required35,50425,353
Copper Metal in concentrate t  ......  Subscription required  ......  Subscription required37,16426,179
Copper Concentrate t  ......  Subscription required  ......  Subscription required165,965122,468
Subscription required - Subscription is required.

Operational Metrics:

Metrics2019201820172016
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required7.7 Mt
Waste  ......  Subscription required  ......  Subscription required  ......  Subscription required
Tonnes processed  ......  Subscription required  ......  Subscription required  ......  Subscription required
Tonnes milled  ......  Subscription required  ......  Subscription required  ......  Subscription required6.5 Mt
Annual milling capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required9.5 Mt
Subscription required - Subscription is required.

Reserves at December 31, 2017:

CategoryTonnage CommodityGradeContained Metal
Proven 127,964 kt Copper 0.41 %
Probable 68,961 kt Copper 0.44 %
Proven & Probable 196,925 kt Copper 0.42 % 822 kt
Measured & Indicated 258.2 Mt Copper 0.4 % 1,033 kt
Inferred 18.1 Mt Copper 0.5 % 91 kt
Total Resource 276.3 Mt Copper 0.41 % 1,123 kt

Commodity Production Costs:

CommodityUnits2019201820172016
Cash costs Copper USD  ......  Subscription required†  ......  Subscription required†
All-in sustaining costs (AISC) Copper USD  ......  Subscription required†  ......  Subscription required† 2.3 / lb†
C1 cash costs Copper USD 1.91 / lb† 1.95 / lb†
† Net of By-Product.
Subscription required - Subscription is required.

Financials:

Units2019201820172016
Sustaining costs M EUR  ......  Subscription required  ......  Subscription required  ......  Subscription required
Revenue M EUR  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Operating Income M EUR  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gross profit M EUR  ......  Subscription required  ......  Subscription required  ......  Subscription required
Pre-tax Income M EUR  ......  Subscription required  ......  Subscription required  ......  Subscription required
After-tax Income M EUR  ......  Subscription required  ......  Subscription required  ......  Subscription required
EBITDA M EUR  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Operating Cash Flow M EUR  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required


Heavy Mobile Equipment as of December 31, 2017:
HME TypeModelSizeQuantityStatusLeased or
Contractor
Backhoe ....................... Subscription required 1 Existing Leased
Backhoe ....................... Subscription required 1 Existing Leased
Compactor ....................... Subscription required 1 Existing Leased
Dozer ....................... Subscription required 2 Existing Leased
Dozer ....................... Subscription required 1 Existing Leased
....................... Subscription required ....................... Subscription required 1 Proposed Leased
Drill ....................... Subscription required 127 mm 4 Existing Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required 2 Proposed Leased
Drill ....................... Subscription required 127 mm 1 Existing Leased
Drill ....................... Subscription required 127 mm 1 Existing Leased
Excavator ....................... Subscription required 14 cu. m 1 Existing Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required 1 Proposed Leased
Excavator ....................... Subscription required 6 cu. m 1 Existing Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required 1 Proposed Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required 3 Proposed Leased
Excavator ....................... Subscription required 7.5 cu. m 1 Existing Leased
....................... Subscription required ....................... Subscription required 1 Proposed Leased
Grader ....................... Subscription required 2 Existing Leased
Truck (dump) ....................... Subscription required 1 Existing Leased
....................... Subscription required ....................... Subscription required 1 Proposed Leased
Truck (dump) ....................... Subscription required 2 Existing Leased
Truck (dump) ....................... Subscription required 1 Existing Leased
Truck (haul) ....................... Subscription required 91 t 12 Existing Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required 17 Proposed Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required 4 Proposed Leased
Truck (haul) ....................... Subscription required 55 t 10 Existing Leased
Truck (water) 90 t 4 Existing Leased
....................... Subscription required ....................... Subscription required 2 Proposed Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jan 20, 2021
....................... Subscription required ....................... Subscription required Subscription required Jan 20, 2021
....................... Subscription required ....................... Subscription required Subscription required Jan 20, 2021
....................... Subscription required ....................... Subscription required Subscription required Jan 20, 2021
....................... Subscription required ....................... Subscription required Subscription required Jan 20, 2021
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2019
Subscription required Subscription required 2018

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2018
................................... Subscription required 2018
Annual Report 2017
Subscription required - Subscription is required.

News:

NewsDate
Atalaya Mining PLC Announces Q4 2020 Operations Update and 2021 Guidance January 14, 2021
Atalaya Mining PLC Announces Junta de Andalucía Validates Mining Permits June 1, 2020
Atalaya Mining PLC Announces Operations Recommence at Proyecto Riotinto April 6, 2020
Atalaya Mining PLC Announces Company Update - COVID 19 Developments March 30, 2020
Atalaya Mining PLC Announces Full Mechanical Completion of 15Mtpa Expansion August 19, 2019

Aerial view:

Subscription required - Subscription is required.

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