Magma from the mantle meets the ocean at seafloor spreading centres. At young rifts, basalt sills may heat overlying sediments and induce natural carbon release; basalt flows elsewhere may offer secure reservoirs for sequestration of anthropogenic carbon.
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Goldberg, D. Carbon below the sea floor. Nature Geosci 4, 11–12 (2011). https://doi.org/10.1038/ngeo1019
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DOI: https://doi.org/10.1038/ngeo1019
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