Massive serpentinite carbonation at Linnajavri, N-Norway
MetadataShow full item record
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.
Showing items related by title, author, creator and subject.
In situ sequestration of atmospheric CO 2 at low temperature and surface cracking of serpentinized peridotite in mine shaftsBeinlich, Andreas; Austrheim, H. (2012)The investigation of carbonate formation at low temperature during weathering of ultramafic rocks has become increasingly important as it represents an analog study for a cost-efficient carbon disposal strategy. Here we ...
Abyssal and hydrated mantle wedge serpentinised peridotites: a comparison of the 15 <sup>°</sup> 20 <sup>'</sup> N fracture zone and New Caledonia serpentinitesMothersole, F.; Evans, Katy; Frost, B. (2017)© 2017, Springer-Verlag GmbH Germany. Subduction of serpentinised mantle transfers oxidised and hydrated mantle lithosphere into the Earth, with consequences for the oxidation state of sub-arc mantle and the genesis of ...
Brent, G.; Rayson, M.; Kennedy, E.; Stockenhuber, M.; Collins, Bill; Prigge, J.; Hynes, R.; Molloy, T.; Zulfiqar, H.; Farhang, F.; Oliver, T.; Hamblin Wang, S.; Dawe, M. (2015)To date, ex-situ carbonation of ultramafic ores such as serpentinite has been studied extensively on the laboratory scale. In Australia, the Mineral Carbonation International (MCi) project was launched in 2013, with funding ...