Geochemistry Without Borders: A Conversation with Alecos Demetriades
From GeOCHemISTea by Sam Scher
October 15, 2025 · 49 min · Season 4 · Episode 10
About this episode
Alecos Demetriades discusses the Global Geochemical Reference Network and its significance in geochemistry.
Alecos Demetriades, applied geochemist and Chair of the IUGS Commission on Global Geochemical Baselines (2024–2028), joins GeOCHemISTea to unpack the Global Geochemical Reference Network (GGRN): why a 160×160 km grid matters, how harmonized sampling/analysis underpins trustworthy baselines, and what QA/QC must look like before interpretation. We touch on FOREGS, leveling national datasets to global references, and practical ways exploration and mining teams can access, use, and contribute to these datasets. Plus: tea stories during Tea Time and why passing knowledge to the next generation keeps this global effort moving. For this episode we read: International Union of Geological Sciences Manual of Standard Methods for Establishing the Global Geochemical Reference Network
People in this episode
Host: Sam Scher
Guest: Alecos Demetriades
Topics covered
- geochemistry
- global geochemical reference
- sampling and analysis
- data harmonization
- exploration and mining
- knowledge transfer
Keywords
- geochemistry
- Global Geochemical Reference Network
- sampling
- data harmonization
- exploration
- mining
- QA/QC
Mentioned in this episode
Organizations: IUGS Commission on Global Geochemical Baselines, International Union of Geological Sciences
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