2025-11-18 エディンバラ大学
＜関連情報＞
- https://www.ed.ac.uk/news/volcanic-rocks-could-store-captured-co2-study-finds
- https://www.lyellcollection.org/doi/full/10.1144/esss2024-001
英国陸上火成岩の原位置鉱化は、大きなCO2貯留の可能性を提供する In situ mineralisation of UK onshore igneous rocks offers significant CO2 storage potential
Angus W. Montgomery, Chris M. Holdsworth, Emma Martin-Roberts, Ian Watt, and Stuart M. V. Gilfillan
Earth Science, Systems and Society Published:18 November 2025
DOI:https://doi.org/10.1144/esss2024-001
Abstract
Safe and permanent storage of CO2 will be required to limit global warming to 1.5–2°C above pre-industrial levels. In situ mineralisation of CO2 within igneous rock formations is a rapid and secure method of geological CO2 storage. This study uses geochemical data and novel volumetric analysis of suitable onshore mafic and ultramafic formations in the UK to determine that these rocks offer a theoretical CO2 storage capacity of 42–38 000 MtCO2 through in situ CO2 mineralisation. Mid-scenario estimates suggest the assessed formations could store ∼45 years of UK industrial point-source CO2 emissions (at 2017 levels). The Antrim Lava Group in Northern Ireland offers the largest potential storage capacity (15–17 300 MtCO2), followed by the Borrowdale Volcanic Group in England (8–8600 MtCO2) and the Skye Lava Group in Scotland (7–7800 MtCO2). Our work demonstrates that UK onshore mafic and ultramafic formations contain significant rock volumes with favourable chemistry for in situ CO2 mineralisation. Future work should prioritize characterizing effective porosity and determining the impact of alteration and formation age on the reactivity and CO2 sequestration ratio of the prospective UK formations.
