Precious metal ores and concentrates · Data Quality Requirements
- Lifecycle status
- Candidate
- Content maturity
- Authored methodology
- Current version
- No published versionLast updated
- Readiness
- Review required
Methodology and translation states come from the source record; publishing this website does not change their review status.
Content languages
zh-CN · Aligned
Status, classification and source details
Readiness
- Warnings methodology_not_reviewed Authored methodology is candidate guidance and still requires methodology review.
Classification mapping
CPC 3.0:14240 · exact
Source
Data Quality Requirements
| requirement_id | Applies to | Requirement | Evidence |
|---|---|---|---|
| representativeness | dataset | Use matching production and exchange periods, actual technology, geography and supplier state. Record startup, shutdown, seasonal variation and substitutions. | collection records |
| identity_and_ranges | all cards | Unresolved identities and missing independent range evidence remain explicit. Do not replace measurement by a guessed industry range or by missing-as-zero. | manifest review metadata |
9. Validation Rules
| rule_id | Applies to | Rule | source_ids |
|---|---|---|---|
| validate_reference | final_product | Verify 1 kg, positive D, product state, property/unit and every required qualifier. Each dataset fixes one product and route. | |
| validate_balance | site | D is independently weighed positive accepted net as-received mineral-product kg at the selected gate, excluding packaging, rejected material and cancelled transfers. Measure wet-basis free-moisture fraction w with0 <= w <1; dry mineral mass = D*(1-w). For each assayed precious-metal element j, explicitly record dry-basis assay a_j in g/t of dry mineral: contained element kg = D*(1-w)a_j/1000000. If assay is a dimensionless mass fraction g_j, contained element kg = D(1-w)*g_j; do not confuse percent, ppm, g/t or troy ounces. Keep D as the common inventory denominator, with separate element indicators. Reconcile dry solids and each assayed metal across feed, accepted mineral product, separate co-products, reject/tailings/dust and stocks, independently of new/circulating/evaporated/discharged water. Recovery requires matched feed/product mass and assays after stock adjustment, not concentrate grade or downstream bullion/refinery yield. Actual thermal/oxidative preparation requires measured phase, element, oxygen, bound/free water and offgas balance; chemical/gas exchange additions are mandatory where actual. | |
| validate_coverage | handoff | Verify each applicable exchange, its provider or environmental compartment and final waste fate; identify skipped checks, unresolved identities, missing measurements and upstream gaps. Errors or unassessed mandatory coverage cannot be labelled complete. |
10. Published Dataset Profile
| Field | Value |
|---|---|
| dataset_role | foreground_dataset |
| downstream_use | secondary_dataset; background_dataset |
| allowed_use | Supply1 kg of accepted precious-metal mineral ore or concentrate in its declared state; individual contained precious metals are qualifiers, not1 kg refined metal |
| excluded_use | Dore/bullion or clean metallic precious-metal products; smelting matte/anode slimes; leach solutions, pregnant carbon/resin, amalgam, precipitated chemical/metal products; recycled scrap/catalyst and industrial residue; another declared base-metal concentrate category; transport-only service |
| required_metadata | site/year; geological/mineral identity and declared precious-metal category; Au/Ag/Pt/Pd/Rh/Ru/Ir/Os suite and each assay; lode/placer/surface/underground/dredging or supplied-stock route; actual gangue/sulfide/chromite/free-metal association and liberation; ore versus mineral concentrate and actual thermal/oxidative phase; free moisture, assay drying method, grain size and deleterious elements; dry-basis assay unit g/t or mass fraction for each element; chosen gate and transport; accepted output/stocks and measured recovery; water basin/return and sediment/waste fate; provider/joint-product allocation and lifetime development output; representative UUID only for compatible gold ore Product/Mass at plant, silver/PGM/concentrates and other states require separate identities |
| required_quality_disclosure | Identity and measurement gaps; boundary coverage; uncertainty; allocation; temporal and geographical representativeness |
| update_trigger | Changed product, route, yield, supply, waste fate, site or representative period |
11. Data Sources
| Source id | Type | Reference | Used for |
|---|---|---|---|
| bgs-platinum-2009 | official_guidance | British Geological Survey, Platinum Mineral Commodity Profile, September2009, original PDF pp.14–15. https://nora.nerc.ac.uk/id/eprint/8726/1/1278_Platinum_Profile.pdf | Qualitative PGM ore comminution, actual magnetic/dense-medium separation, flotation and distinction from smelting/refining. No moisture cutoff, recovery, thermal setting or market default. |
| epa-gold-placer-1994 | official_guidance | US EPA, Technical Resource Document Volume6 Gold Placers Part1, October1994, original PDF pp.18–19. https://archive.epa.gov/epawaste/nonhaz/industrial/special/web/pdf/placer1.pdf | Actual placer excavation/washing/gravity concentration, tailings/settling/reclaimed-water route and mineral concentrate versus bullion gate; historic quantities and legal/technology-share claims not adopted. |
| epa-gold-lode-1994 | official_guidance | US EPA, Technical Resource Document Volume2 Gold Chapter1, EPA530-R-94-013, August1994, original PDF pp.28–30. https://archive.epa.gov/epawaste/nonhaz/industrial/special/web/pdf/goldch1.pdf | Qualitative lode mining, mineral flotation/gravity route and distinction from amalgamation/cyanidation metal recovery. No historic grade, recovery, national production or reagent-dose default. |
| wco-hs26-2022 | official_guidance | WCO HS Nomenclature2022 Chapter26, original PDF pp.1–2, mineralogical Note2 and heading2616 silver/other precious-metal ores and concentrates. https://www.wcoomd.org/-/media/wco/public/global/pdf/topics/nomenclature/instruments-and-tools/hs-nomenclature-2022/2022/0526_2022e.pdf?la=en | Full precious-metal mineral ore/concentrate identity and separation from industrial residues/matte; no new HS mapping or quantity. |
| ifc-mining-2007 | official_guidance | IFC, Environmental Health and Safety Guidelines for Mining, 10 December 2007, sections 1.1 and Annex A. https://www.ifc.org/content/dam/ifc/doc/2000/2007-mining-ehs-guidelines-en.pdf | Mining water, wastes, emissions, development and closure; no product-specific default factors. |
| cpc3-notes-2025 | official_guidance | UNSD, CPC Version 3.0 Explanatory Notes, 30 June 2025. https://unstats.un.org/unsd/classifications/Econ/Download/In%20Text/CPC_Ver_3.0_Exp_Notes_30Jun2025.pdf | Classification scope only; no process quantities. |
| ef-allocation-2021 | official_guidance | Commission Recommendation (EU) 2021/2279, Annex I section 4.5, consolidated 30 December 2021. https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:02021H2279-20211230 | Multifunctionality hierarchy; not a claim of complete PEF conformity. |
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