Romania

Baita Plai Mine

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Categories

Overview

Mine TypeUnderground
Commodities
  • Copper
  • Lead
  • Zinc
  • Molybdenum
  • Bismuth
  • Silver
  • Gold
Mining Method
  • Cut & Fill
  • Open stoping
  • Longhole stoping
  • Undefined backfill
Production Start... Lock
Mine Life2024
ShapshotThe Baita Plai Polymetallic Mine (BPPM) commenced production in October 2020.

The Vast Resources made good progress in transitioning to a mechanised mining methodology, culminating in the commencement of long-hole stopping in calendar Q3 2022. This together with the completion of a second milling circuit in June 2022, will allow a significant increase in production at the mine. BPPM commenced molybdenum concentrate production in August 2022.

Owners

SourceSource
CompanyInterestOwnership
Vast Resources Plc. 100 % Indirect
Vast Resources' Romanian portfolio includes 100% interest in producing Baita Plai Polymetallic Mine.

On 23 November 2020, the Company acquired the remaining non-controlling interest of 20% in Vast Baita Plai SA (formerly African Consolidated Resources SRL). Following the acquisition, Vast Baita Plai SA is a 100% owned subsidiary of the Company.

Deposit type

  • Skarn

Summary:

The Baita Plai mineralisation in geological terms is the most important manifestation of skarnhosted mineralisation in the Apuseni Mountains. The mineralisation hosts a large number of mineral species (about 90), some of which were described for the first time in the world (rezbanyite, szaibelyite or ascharite, and kotoite).

The main economic minerals, notably Cu, Pb, Zn, Au, Ag, Mo, Bi, W, and B, are concentrated in favourable sites due to the interaction of local faults (notably the Blidar contact) and a number of lesser fractures that have localised the mineralised veins, magmatic alteration, and favourable host rock lithologies (limestone and dolomites).

The orebody is hosted within Triassic limestones and dolomites, in faulted contact with underlying Permian shales across the Blidar fault. The skarn alteration is related to a granite intrusion which is interpreted to lie beneath the sediments as at yet an undetermined depth. Dykes of granitic, andesitic and lamprophyre origins cut the sediments at high angles but are reported to be pre-skarn. The host limestones and dolomites have undulating sub-horizontal dips, varying from 0-30 degrees.

A mineralogical study on metallurgical samples sent to Grinding Solutions (UK) was conducted during 2020 in which the main copper bearing minerals were identified as chalcopyrite, bornite and chalcocite, the main lead bearing mineral is galena and the main zinc bearing mineral is sphalerite. The dominant silver bearing minerals were identified as hessite and tetrahedrite.

The skarn mineralisation is hosted in several subvertical pipe-like bodies, often with tree-like branched geometries. Current mining is restricted to solely within the Antonio skarn. The Antonio North skarn is located approximately 300 meters to the north east of the Antonio skarn and is accessible from the same underground development structure serving the Antonio skarn on 18 level. It is postulated that the Antonio 1 and 2 pipes may merge at depth a few hundred metres below Level 18, forming a substantially larger orebody.

In plan view, the Antonio skarn is an elliptical shape with dimensions of approximately 160- 250 meters on strike and approximately 10-20 meters wide across strike. Within the skarn, the economic mineralisation forms lenses, veins and pods 1.5 – 20 meters wide, and of widely varying orientations.

The margins of the mineralisation are sharp against the calcareous country rock and visual identification of the contacts ensures minimal mining dilution.

The Antonio skarn is shown to be vertically zoned with gold and silver caps and with lead and zinc being of higher grade in the upper levels. Copper grades show an increase with depth and the recent drilling has provided evidence of a high correlation between copper, gold, silver and bismuth grades. A moderate correlation between lead and silver has been observed in the recent data. As copper gold and silver are major contributors to the mine economics, increasing grade at depth is an attractive target.

Reserves

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Mining Methods

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Comminution

Crushers and Mills

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Processing

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Production

CommodityUnits2022
Copper kt 00
All production numbers are expressed as concentrate.

Operational metrics

Metrics2022
Ore tonnes mined 00000

Production Costs

Commodity production costs have not been reported.

Operating Costs

Currency2020
Total operating costs ($/t milled) USD 201  

Heavy Mobile Equipment

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AV - Autonomous

Personnel

Mine Management

Source Source
Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 16, 2023
....................... Subscription required ....................... Subscription required Subscription required Nov 16, 2023
....................... Subscription required ....................... Subscription required Subscription required Nov 16, 2023

Aerial view:

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