Sample Professional Intelligence Report (Tier 2) — illustrative, built entirely on open public data to show the format of a paid GeaSpirit report. Not a for-sale listing, not ownership-verified, not investment advice.
Rodalquilar Gold District — Sample Intelligence Report
A historic high-sulphidation epithermal gold district in Almería, Spain — closed in 1966 on grade economics, not on exhausted geology, and now inside a protected natural park. A worked example of GeaSpirit Tier-2 intelligence on a dormant historic asset.
1. Executive summary
Rodalquilar is a high-sulphidation epithermal gold system in a ~11 Ma Miocene caldera in Cabo de Gata, Almería. It produced on the order of one tonne of gold through the Denver cyanidation plant (1956–1966) before closing when mill-feed grade fell below ~7 g/t — an economic closure, not a geological one. A brief 1989–1990 reappraisal by St. Joe followed. It scores in the MEDIUM band: a credible historic signal whose certainty is reduced by sparse modern drilling and an overriding land-use constraint.
2. GeaSpirit Score
Headline GeaSpirit Score: 69.2 / 100 MEDIUM confidence. The score is a 0–100 triage signal built from four 0–25 dimensions — Signal (spectral + geological favourability), Access/Depth (reachability + infrastructure), Precision (spatial tightness) and Certainty (validation strength, penalised for missing evidence). Read it with its band, never in isolation. See the methodology for the full definition.
3. Open-data asset profile
| Field | Open-data value | Evidence |
|---|---|---|
| Commercial status | Historic / closed | L1 |
| Known production / estimate | ~1,000 kg Au extracted; ~20,000 t ore/yr at Denver plant (1956-1966) | L2 · sourced |
| Resource / reserve | Estimated reserves ~3 tonnes gold | L2 · sourced |
| Grade | Las Ninas ~10 g/t, Consulta ~20 g/t; ~5 g/t at 1966 closure | L2 · sourced |
| Operator | Minas de Rodalquilar S.A. (1928-36); Adaro/INI until 1966; St. Joe 1989-90 | L1 |
| Period | 1880s-1966 (Denver plant 1956-1966); brief reopening 1989-1990 | L1 |
| Deposit type | Epithermal high-sulphidation Au-As vein/breccia in Miocene caldera (~11 Ma) | L1 |
| Closure / status reason | Economic unviability (grade below ~7 g/t); later natural park protection | L1 |
| Coordinates | 36.8513, -2.0448 | verified |
Historic epithermal Au mining district in Cabo de Gata volcanic field. Worked from 1880s; peaked in the 1950s with the state-built Denver cyanidation plant (1956), then Europe's largest, inaugurated b
4. Second-chance thesis
The geology was never the problem: vein and breccia grades of 10–20 g/t at Las Niñas and Consulta show the system carries economic tenor. The second-chance levers are (a) modern selective mining and heap-leach recovery that change the cut-off that closed the mine in 1966, and (b) re-logging the extensive historic workings. The decisive constraint is non-geological: the district lies within the Cabo de Gata-Níjar Natural Park, so any thesis here is environmental-permitting-first, exploration-second. This is exactly the kind of honest blocker GeaSpirit surfaces up front rather than burying.
5. Comparables
Comparable Spanish epithermal/structurally-controlled gold: Salave (Asturias) — 1.56 Moz @ 2.85 g/t but permit-blocked, the same permitting-risk pattern. For caldera-hosted high-sulphidation analogues, the broader Cabo de Gata volcanic field hosts related alteration systems. Across the Iberian context, dormant assets that closed on price (Rio Tinto, Tharsis) show how Spanish historic districts re-enter study when metal prices and technology move.
6. Due-diligence checklist
- Confirm current land-use / Natural Park boundaries and whether any mineral title is legally obtainable.
- Compile all historic Adaro/INI and St. Joe drill and assay records; digitise and re-model.
- Independent QA/QC sampling of accessible vein exposures and historic dumps for heap-leach amenability.
- Metallurgical test work on representative material at modern recovery assumptions.
- Environmental and social baseline — this is the gating risk, not the geology.
- Legal review of title availability inside a protected area before any expenditure.
7. Evidence & provenance
Primary open source: https://es.wikipedia.org/wiki/Minas_de_Rodalquilar. Production, resource and grade figures are at Evidence Level 2 (matched to a cited open source); a Tier-3 Revival Dossier would add GeaSpirit-engine satellite back-analysis, geochemical context and independent verification. Each figure and the source document can be hashed (SHA-256) and timestamp-anchored on the SOST chain, making this report’s provenance tamper-evident — we anchor trust, never ownership.