Copper · Junior / Minor · Developer · South America
Last updated 21 June 2026
Data compiled from public filings — information only, not investment advice. AI‑assisted; see methodology.
Development · 1 project
Altar
Asset · Development · Ownership 80%
Project information
As at 25 November 2024
Description
As at 25 November 2024
Cluster of large Miocene porphyry copper-gold deposits ~10 km from the Chile-Argentina border and ~180 km west of the city of San Juan, with mineralization in five zones (Altar East, Altar Central, Altar North, QDM-Radio Porphyry ~3 km west, and the recently discovered Altar United). Held 80% by Aldebaran / 20% Sibanye-Stillwater through Peregrine following completion of the Altar JV earn-in (US$15M cash, 19.9% equity, US$55M funding); Nuton (Rio Tinto) terminated its US$250M option in November 2025 after paying US$30M. The October 2025 PEA (SRK, effective September 1, 2025) outlines a 60,000 tpd flotation concentrator fed by an open pit (223 Mt @ 0.44% Cu) and underground block caves (768 Mt @ 0.50% Cu) over a 48-year life; first-20-year output averages 121,445 t CuEq/yr at C1 $1.71/lb. Updated MRE due Q2/Q3-2026, PFS targeted Q4-2026/Q1-2027, RIGI application planned; mineralization remains open in several directions.
Mining metrics
Multiple effective dates · exclusive
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Reserves & resources by deposit
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Reserves & resources — detail
Multiple effective dates
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Royalties & streams
All royalty and stream interests in the database that refer to this asset by name.
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Exploration · 6 projects
Rio Grande
Asset · Exploration
Project information
As at 17 August 2018
Description
As at 17 August 2018
Near-surface copper-gold-silver project in the Altiplano of northwest Argentina at 3,700-4,700 m elevation, ~260 km west of the city of Salta and 40 km east of the Chilean border; discovered in 1999 with 129 holes (~74,201 m) drilled to date. The 2018 RPA mineral resource (effective August 17, 2018) is based on a potential open pit with heap leaching and flotation of oxide, transition and sulphide material; amenable to heap leach extraction with growth opportunities. No material work since July 2020. Slated for transfer to the Centauri Minerals spin-out (with Aguas Calientes and four early-stage properties) under the October 2025 share transfer agreement, expected to close in H1-2026; the Initial Raise will fund an updated NI 43-101 technical report and a 2026 geochemistry/geophysics program to advance the project to drill-ready status.
Mining metrics
As at 17 August 2018 · exclusive
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Reserves & resources by deposit
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Reserves & resources — detail
As at 17 August 2018
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Aguas Calientes
Asset · Exploration
Project information
Description
Early-stage epithermal gold-silver project in Jujuy Province, northwestern Argentina, 130 km west of the city of Salta, comprising a single claim of 4,835 ha. Two main zones display epithermal Au-Ag mineralization associated with silica-(clay)-sericite alteration in Miocene volcanic/volcanoclastic rocks and adjacent Late Cretaceous-Tertiary sediments; well-mineralized float boulders occur along ~6 km of strike, suggesting potential for a preserved, large epithermal system. Three 1.5 km AMT geophysical test lines were completed over the Silon Zone near hole ACA-19-023; no drilling since the 2019 campaign. To be transferred to the Centauri Minerals spin-out under the October 2025 share transfer agreement.
Mining metrics
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Catua
Asset · Exploration
Project information
Description
Early-stage exploration property of 900 ha in Jujuy Province, Argentina, acquired from Regulus under the 2018 Plan of Arrangement; no material resources have been dedicated to the property. Included in the portfolio to be transferred to the Centauri Minerals spin-out.
Mining metrics
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El Camino (remaining claims)
Asset · Exploration
Project information
Description
Early-stage exploration claims totalling 2,910 ha in Salta Province, Argentina, retained after the sale of the El Camino II claim to NOA Lithium Brines S.A.; acquired from Regulus under the 2018 Plan of Arrangement with no material work since. Included in the portfolio to be transferred to the Centauri Minerals spin-out.
Mining metrics
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La Frontera
Asset · Exploration
Project information
Description
Early-stage exploration property of 1,200 ha in Catamarca Province, Argentina, acquired from Regulus under the 2018 Plan of Arrangement; no material resources have been dedicated to the property. Included in the portfolio to be transferred to the Centauri Minerals spin-out.
Mining metrics
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Oscara
Asset · Exploration
Project information
Description
Early-stage exploration property of 18,329 ha in Salta Province, Argentina, the largest of the non-core land positions acquired from Regulus under the 2018 Plan of Arrangement; no material resources have been dedicated to the property. Included in the portfolio to be transferred to the Centauri Minerals spin-out.
Mining metrics
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Royalty Exploration · 1 project
El Camino II NSR Royalty
Asset · Royalty · Exploration
Project information
Description
Retained 1% net smelter return royalty over the El Camino II claim (1,199 ha) in Salta Province, Argentina, sold to NOA Lithium Brines S.A., a subsidiary of NOA Lithium Brines Inc., under the May 2022 option completed during the period ended March 31, 2025. The royalty covers gold, silver, copper, lead and zinc mined on the property, and Aldebaran is also entitled to a conditional US$1,000,000 payment tied to a construction decision or commercial production after a definitive feasibility study.
Royalty interests
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Assumptions
- The projects listed here reflect the information captured in this workspace and are not necessarily a complete picture of the company's portfolio. For authoritative figures, refer to the company's official filings.
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How to read this tab
- The tables below list unit codes most often used in the Base Metals sector for this company. MetalPilot stores contained metal or product in the codes below; grade and tonnage use separate fields. In side-by-side comparison views (stock page Portfolio tab, watchlist By sector), heterogeneous source units are converted to each commodity's preferred display unit (for example Moz Au, kt Cu, MMbbl oil) before summing; the same canonical codes appear in project data.
What the Portfolio tab shows
- The Portfolio tab presents a project-level view of the company's reported assets, built from publicly disclosed information (technical reports, annual filings, MD&A, investor presentations, MRMR / R&R statements, NI 43-101 / NI 51-101 / SEC S-K 1300 / SEC S-K 1200 / JORC / SAMREC / PERC / PRMS / COGEH filings, and similar primary sources).
- Figures are grouped by project type (mining, oil & gas, royalty, stream, processing facility, development, portfolio aggregate) and are shown alongside the headline reserve base, headline production, headline grade / quality, cost benchmarks, estimated lifetime, commercial terms (for royalties / streams), operational capacity (for processing) and a single-figure rating where the underlying data supports one.
- Each data table on the Portfolio tab is followed by ONE Assumptions footnote describing the modelling choices for that table; KPI stat-card assumptions appear in the bottom block instead. All legal and section disclaimers are merged into a single disclaimer list at the bottom of the Portfolio tab.
Concepts in your sector — Base metals
- Cu % / Zn % are the grade norm for base metals; kg/t is for very high-grade deposits. Porphyry copper is typically 0.3–1% Cu; SEDEX zinc 5–15% Zn.
- C1 vs C2 vs C3 vs AISC. C1 is direct mining + processing + transport + by-product credits. C2 adds depreciation; C3 adds corporate/indirect costs. Compare like for like.
- TC/RCs (treatment & refining charges) are smelter payments per dry metric tonne of concentrate — a non-trivial part of base-metal economics, not shown on the Portfolio tab.
- Concentrate vs metal. Miners often sell concentrate (~25–30% Cu) and are paid for contained metal minus TC/RCs. Portfolio books contained metal on a 100% basis.
Portfolio tab — table guide
- Portfolio KPIs — company-level headline numbers aggregated from the featured projects (project counts, attributable annual production by commodity, attributable resource base by commodity, last filing date, operator share). USD value lines multiply attributable volumes by the resolved snapshot price.
- Portfolio snapshot — one-screen summary of the portfolio: counts by type and status, country mix, reporting standards used, operator share, primary commodity, attributable annual production summary and attributable resource base summary.
- Mining — one row per mining project, with columns for project name, location, status, primary commodities, production (with rating), reserves & resources (with rating), grade (with rating), costs and estimated lifetime. Multi-commodity projects emit one summary row per commodity.
- Royalty — one row per royalty interest held by the company. Columns cover the underlying project, operator, commodity, commercial terms (rate, type, cap, area-of-interest), attributable production, attributable reserves and estimated lifetime.
- Stream — one row per metal stream held by the company. Each row shows the underlying project, the streamed commodity, the headline stream percentage, the ongoing per-ounce / per-tonne payment, and attributable production / reserves.
- Processing facilities — one row per midstream / processing facility (pipeline, fractionator, LNG train, storage cavern, refinery, smelter, mill, heap-leach pad, CPP, etc.). Columns include nameplate capacity, contracted capacity, feedstock commodities and operational footprint.
- Development — projects in development status or in a pre-production lifecycle phase. The production column is re-labelled 'Targeted production (rating)' to highlight that the figures are plans, not actuals.
- Portfolio Aggregate — a single company-level row used when the company itself publishes a portfolio rollup (e.g. company-wide 2P barrels across all properties).
- Reserves & resources — detail — a leaf-category pivot showing every reserve and resource category disclosed across the projects.
- NPV (grouped) — all NPV rows captured from the filings, grouped by commodity, resource category, development status and pricing case. Each NPV figure is shown with its discount rate, basis (before-tax / after-tax), currency and value scale.
Ownership / Working interest
- Ownership percentage means the company's working-interest share of the asset: its slice of the project before royalties and before government take. It is shown on a 0–100 scale.
- Mines, oil and gas fields, and processing facilities — this is how much of the asset belongs to the company under that working-interest idea. One hundred percent is fully owned; a lower number usually means partners share the rest.
- Royalties and streaming agreements — the percentage is often not the story; what matters economically is usually the royalty or stream rate, shown elsewhere alongside these figures.
- Oil and gas — read this as gross working interest only. Do not treat it as net production or net wells after royalties; when filings distinguish gross from net, that shows up in how the resource numbers themselves are labelled.
- Below 100% — the short summary for each project names other owners and their stakes when the source says who they are.
- NRI vs WI (O&G). Working interest (WI) is the obligation to pay a share of costs; net revenue interest (NRI) is the share of revenue after royalties and overriding-royalty interests. A 100% WI well rarely produces 100% NRI; typical onshore U.S. NRI is 75–87.5% of WI depending on the lease royalty.
- Operator vs non-operator. The operator runs day-to-day operations; non-operating partners pay their WI share of costs but do not run the asset. Some Portfolio rows show operator share where disclosed.
- Consolidation method — how the issuer accounts for the asset. Separate from how much the company owns (ownership %) and who operates it, this accounting treatment decides whether an asset's figures sit inside the company's reported group totals or are stripped out to a single net line. It applies to operating assets (mines, oil & gas fields, processing facilities) and is left blank for royalties, streams, and company-level portfolio rollups.
- Consolidated — the company controls the asset and includes 100% of its figures in the group total; the portion it does not own is carried as a non-controlling interest (NCI). Control is not the same as a majority, so a company can consolidate an asset it holds less than half of. Where ownership is below 100%, the Portfolio shows the NCI percentage (100 minus the company's stake).
- Proportionate — a jointly-operated asset the company includes at its own share, line by line; the share is inside the group total.
- Equity method — an associate or joint venture shown on a single net line, with its revenue excluded from the group total. This is the usual reason a company's reported total is smaller than the sum of its individual assets; the Portfolio flags the share of a commodity total that is equity-accounted.
- Cost / other — a passive or fair-value holding, excluded from the group total.
Unit codes, conversion cheat sheets, cost benchmarks (AISC, C1–C3), reporting standards (NI 43-101, JORC, SEC S-K 1300) and resource/reserve category definitions live in the full terminology & units reference.
Each table lists the numeric band for scores 1–5 (production and resource base; grade where applicable for mining commodities) using the same thresholds as project rating stat cards. Only commodities that appear on featured projects for this document are listed.
Gold
Silver
Copper
Molybdenum
Copper uses kt Cu bands; lb-scale copper resources are converted to kt. Lithium grade uses hard-rock % Li₂O bands unless brine-style extraction or brine units appear on featured projects.
Assumptions
- Presented values are denominated in currency of the country where the company is headquartered. Values like market capitalization might differ from the values visible in other parts of the page, where the currency is always USD.
Commodity guides
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