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dc.contributor.authorBeinlich, Andreas
dc.contributor.authorPlümper, O.
dc.contributor.authorHövelmann, J.
dc.contributor.authorAustrheim, H.
dc.contributor.authorJamtveit, B.
dc.identifier.citationBeinlich, A. and Plümper, O. and Hövelmann, J. and Austrheim, H. and Jamtveit, B. 2012. Massive serpentinite carbonation at Linnajavri, N-Norway. Terra Nova. 24 (6): pp. 446-455.

Carbonation of ultramafic rocks is being considered as an in situ disposal strategy for anthropogenic CO 2. We present observations from massively carbonated serpentinites at Linnajavri, N-Norway, where serpentinized fragments of the dismembered ophiolite are hydrothermally altered to soapstone and listvenite on a km-scale. Several sharp reaction fronts between the soapstone and the serpentinite can be followed for hundreds of metres. Listvenite is present between the underlying carbonate-mica schist and the soapstone. The O-isotopic compositions of vein minerals in the listvenite and adjacent soapstone indicate an isothermal formation at ~275°C. In agreement with C-isotope signatures, field observations suggest that fluids were derived from overthrusted sediments. Porosimetry data, mass-balance calculations and the perpetuation of serpentinite structures imply an isovolumetric alteration. We conclude that the reactions stopped due to the cessation of the external CO 2 supply. Soapstone formation is associated with sequestration of more than 13 Mt of CO 2. © 2012 Blackwell Publishing Ltd.

dc.titleMassive serpentinite carbonation at Linnajavri, N-Norway
dc.typeJournal Article
dcterms.source.titleTerra Nova
curtin.departmentThe Institute for Geoscience Research (TIGeR)
curtin.accessStatusFulltext not available

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