The architecture of basalt reservoirs in the North Atlantic Igneous Province with implications for basalt carbon sequestration ...

• Main Authors: Rosenqvista, Marija P., Millett, John M., Planke, Sverre, Johannesen, Rakul M., Passey, Simon R., Sørensen, Erik V., Vosgeraug, Henrik, Jamtveit, Bjørn
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Geological Society of London 2023
• Subjects: Geology; FOS Earth and related environmental sciences; Faroe Islands; North Atlantic
• Online Access: https://dx.doi.org/10.6084/m9.figshare.c.6949132.v1; https://geolsoc.figshare.com/collections/The_architecture_of_basalt_reservoirs_in_the_North_Atlantic_Igneous_Province_with_implications_for_basalt_carbon_sequestration/6949132/1

Offshore CO 2 sequestration in basaltic formations of the North Atlantic Igneous Province (NAIP) may allow permanent storage of large volumes of CO 2 through rapid carbonate mineralization. Characterizing the internal architecture of such reservoirs is key to assessing the storage potential. In this study, six photogrammetry models and three boreholes on the Faroe Islands have been used to characterize the internal lava sequence architectures as a direct analogue to potential offshore NAIP storage sites. The studied formations are dominated by ca. 5 m to 50 m thick simple and compound lava flows, with drill core observations documenting a transition from pāhoehoe moving towards ‘a’ā lava flow types interbedded with thin (<5 m thick) volcaniclastic rock units. The identification of flow margin breccias is potentially important as these units form excellent reservoirs in several other localities globally. Stacked, thick simple flows may present sealing units associated with dense flow interiors. Connected ...