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Spain
Valtreixal Project

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 Location:
96 km NW from Zamora, Spain

  Project Contacts:
100 King Street West Suite 5700
Toronto
Ontario, Canada
M5X 1C7
Phone  ...  Subscription required
Fax+1 (416) 628-2516
EmailEmail
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StagePermitting
Mine TypeOpen Pit
Commodities
  • Tungsten
  • Tin
Mining Method
  • Truck & Shovel / Loader
Processing
  • Dewatering
  • Wet Screening
  • Filter press plant
  • Vacuum filtration
  • Shaker table
  • Spiral concentrator / separator
  • Electrostatic separation
  • Gravity separation
  • Flotation
  • Magnetic separation
Mine Life5 years (as of Jan 1, 2015)
During June 2020, the Company received, from the Municipality of Pedralba de la Paraderia in Spain, a new land classification for its Valtreixal Property whereby the property is now deemed to be suitable for extraction activity. This new land classification will now allow the Company to complete the mining permitting process and to move forward with the completion of an open-pit mine plan for the property.


Owners

Source: p. 4
CompanyInterestOwnership
Almonty Industries Inc. 100 % Indirect
Valtreixal Resources Spain S.L (operator) 100 % Direct
Ownership Tree
Valtreixal Resources Spain S.L. (“Valtreixal Resources”), an indirect wholly-owned subsidiary of the Company, owns a 100% interest in the Valtreixal tin and tungsten mine project located in Western Spain (the “Valtreixal Mine”). The principal business of Valtreixal Resources is the exploration of the Valtreixal Mine.

Deposit Type

  • Vein / narrow vein


Summary:

The local Valtreixal stratigraphy in the Valtreixal area is dominated by 3 main formations, all of which broadly strike SW-NE, and dip at approximately 80o to the south- east.

a) Schists - Capas de los Montes. Very stratified and transformed by regional metamorphism, with intercalated quartzites, and marked at the base by conglomerates. Thickness approximately 1000m.

b) Quartzites - Peña Goda/Culebra. Alternating with a variety of types and colours of intercalated schists. Thickness approximately 50- 70m.

c) Slates – Pizarras de Luarca. Pelitic series of siliceous slates, phyllites and schists. This formation hosts most of the mineralisation at Valtreixal. High frequency of segregated quartz veins and schist bands sometimes rich in sulphur. Overall thickness approximately 300-600m.

Much of the mineralisation, especially scheelite, is situated away from the quartz veins and appears to be stratabound. Tin, in the form of cassiterite, occurs in and around the quartz veins. The Valtreixal linear mineralised zones appear, in a general sense, to be confined to specific stratigraphic intervals and there appears to be a degree of separation into tin and tungsten zones. Because of the stratabound nature of the mineralised zones within a shale basin some may consider a sedimentary, syngenitic origin for the tungsten mineralisation to be plausible.

The Valtreixal tungsten (scheelite) and tin (cassiterite) mineralisation exhibits two principal modes of occurrence within southeast dipping, weakly schistose Ordovician shale in the Hercynian (Variscan) tectonic belt. Irregular quartz veins cut the moderately steeply southeast dipping shale and may have associated tin and tungsten mineralization especially where the veins are brecciated and the adjacent wall rock has been altered to sericite schist.

In places it was observed that minor amounts of white kaolin clay had developed by schist alteration. It is notable that mica, probably muscovite coats some surfaces of the glassy quartz fragments and minor open spaces may indicate incipient, vuggy greisen development. It is postulated that originally the quartz veins developed along fractures in the country rocks.

Subsequently, the possible intrusion of a hypothetical granite body at depth provided a heat source to drive a hydrothermal system, brecciating the quartz veins. Any such granitic or other heat source was sufficiently deep so that the shale, seen at Valtreixal, is beyond the granitic metamorphic aureole. Strong hydro-fracturing and concomitant seismic activity may have created temporary weakness along the laminated shale allowing lateral migration of mineralising solutions away from the brecciated veins or other sources for a considerable distance.

The shale is relatively impervious to solution penetration across the bedding by absorbing stress and by yielding more plastically. High pressure fluids may have ruptured many of the rigid quartz veins. The country wall rock adjacent to the brecciated quartz vein is metamorphosed to sericite schist. In general the shale, based on visual and textural features, is considered to be in the low, chloritic metamorphic range.

The mineralisation at Valtreixal can be classified as a complex vein deposit. The tin mineralisation, in the form of cassiterite, is hosted by a mixture of individual veins, veinlets and vein swarms, generally with the same overall dip and dip direction. The distribution and width of veins can be quite erratic within localised areas.


Mining Methods

  • Truck & Shovel / Loader


Summary:

In the absence of geotechnical testwork, actual topographical toes and crest positions have been measured in areas where there are road cuttings or surface excavations for drilling platforms or access purposes. From these measurements, an average face slope angle of 56o was determined. Based on an assumed bench configuration of 10m benches, 4m berms every 2 benches, and 10m wide haul roads (or safety berms), this has given an estimated overall slope angle of approximately 42o. This overall slope angle has therefore been applied in optimisation work.

The majority of the pit design is cut into the west sloping existing hillside. A 10m wide haul road been put into the design with the exit point at the extreme west end, the lowest of point of the optimal pit rim, at an elevation of approximately 870m. This road is used to access lower parts of the design, down towards the lowest point at 820mRL. Access to the eastern, and higher, part of the pit will be gained from temporary access roads from the existing surface on higher benches.

Berms of 4m have been incorporated into the design every 20m vertically. For the extended highwall of the pit up to 1015mRL on the southern and eastern sides of the pit, additional 14m safety berms were put in every 60m vertically.

The overall pit is approximately 700m in length along strike, and 300m wide at its widest point.

Considerable amounts of earthworks have been completed over the past 2 years at Valtreixal, for preparation of drilling platforms and road access purposes. These cuttings have been made in all of the main rock types that will occur inside the pit envelope. Geologists have also had to take bulk samples from underground galleries for metallurgical testing. This experience has indicated that all of the rock types within the Valtreixal pit can be mined by free digging, so drilling and blasting will not be required.

Main benches will be 10m high, with 5m sub- benches in ore, in order to assist with ore/waste discrimination. Grade control will be assisted by the taking of bench face and trench samples, as well as uv lights to assist with the identification of scheelite.

For scheduling purposes in the current study, the pit has been divided into two principal pushbacks, approximately dividing the pit into a west half and an east half. Mining will start in the western (lower) pushback, and then as mining progresses deeper in this pushback, mining will also start on the upper benches of the eastern pushback. Many of these upper benches will be accessible from temporary roads on south-eastern side of the pit.


Crushing and Grinding
Flow Sheet: Source
Crusher / Mill TypeModelSizePowerQuantity
Jaw crusher 1
High Pressure Grinding Rolls (HPGR) 1
Rod mill 20 kW 1

Summary:

Mined ore will fed to a jaw crusher from a ROM pad. It is envisaged that separate stockpiles, according to WO3 or Sn content will be developed maintained. The jaw crusher material will produce minus 200mm material.

The material will then be passed through a cylindrical trommel so as to separate clay and very fine material. The next stage will be a one or two stage roller mill, producing minus 5mm material.

The small rod mill will produce material less than 0.5mm, to assist cleaning in the subsequent flotation. The rod mill will not be more than 20 kW, and run at approximately 1 tph.


Processing

  • Dewatering
  • Wet Screening
  • Filter press plant
  • Vacuum filtration
  • Shaker table
  • Spiral concentrator / separator
  • Electrostatic separation
  • Gravity separation
  • Flotation
  • Magnetic separation

Flow Sheet: Subscription required

Summary:

The beneficiation plant will have a nominal treatment capacity of 500,000 t/year of crude ore. Under normal conditions, the plant will work 24 hours a day, 365 days a year, and so will operate at approximately 58 tph. All of the milling operations will be housed in single steel clad building structure, with an area of approximately 20,000 m2. It is estimated that the electric power required for the Treatment Plant will be approximately 1,500 kW.

The milling operation is envisaged as:
- Crushing, grinding and gravity separation of scheelite and cassiterite into a bulk concentrate;
- Removal of sulphides from the bulk concentrate by flotation;
- Drying and electrostatic separation of the bulk concentrate into scheelite and cassiterite concentrates.

Similar to current milling operations at Los Santos, crushing and grinding operations would like comprise a jaw crusher, cone crushers, followed by a rod mill. Following separation into different size fra ........

Recoveries & Grades:

CommodityParameterAvg. LOM
WO3 Recovery Rate, % 55
WO3 Head Grade, % 0.25
WO3 Concentrate Grade, % 65
Tin Recovery Rate, % 65
Tin Head Grade, % 0.12
Tin Concentrate Grade, % 50

Projected Production:

CommodityUnitsLOM
WO3 t 3,567
Tin t  ......  Subscription required
All production numbers are expressed as metal in concentrate.

Operational Metrics:

Metrics
Stripping / waste ratio 8.2 *
Waste tonnes, LOM 8,477,958 cu. m *
Ore tonnes mined, LOM 2,559,459 t *
Total tonnes mined, LOM 9,469,935 cu. m *
Annual milling capacity 500,000 t *
* According to 2015 study.

Reserves at October 31, 2015:
Cut-off applied of 0.05% WO3Eq.

Reported Reserves and Resources have not changed on December 31, 2021. [2021 AIF, 55-56]

CategoryTonnage CommodityGrade
Probable 2,549 kt WO3 0.25 %
Probable 2,549 kt Tin 0.12 %
Probable 2,549 kt WO3Eq 0.34 %
Indicated 2,828 kt WO3 0.25 %
Indicated 2,828 kt Tin 0.13 %
Indicated 2,828 kt WO3Eq 0.34 %
Inferred 15,419 kt WO3 0.08 %
Inferred 15,419 kt Tin 0.12 %
Inferred 15,419 kt WO3Eq 0.17 %

Commodity Production Costs:

CommodityUnitsAverage
Assumed price Tin USD 10.5 / lb *
Assumed price WO3 USD 28,800 / t *
* According to 2015 study / presentation.

Operating Costs:

Units2015
OP mining costs ($/t milled) USD 1.26 *
Processing costs ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2015 study.
Subscription required - Subscription is required.

2015 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Total CapEx $M USD  ......  Subscription required
OP OpEx $M USD  ......  Subscription required
Processing OpEx $M USD 24.9
G&A costs $M USD 8.3
Total OpEx $M USD  ......  Subscription required
Gross revenue (LOM) $M USD  ......  Subscription required
Operating margin (LOM) $M USD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M USD  ......  Subscription required
Pre-tax NPV @ 10% $M USD  ......  Subscription required
Pre-tax NPV @ 6% $M USD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
Subscription required - Subscription is required.

Proposed Heavy Mobile Equipment as of October 31, 2015:
HME TypeModelSizeQuantity
Backhoe ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNamePhoneProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jul 4, 2022
....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Jul 4, 2022
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
Quarterly Report 2022
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Annual Information Form 2018
Other 2018
Technical Report 2015
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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