Geological storage of CO2 within the oceanic crust by gravitational trapping

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doi: 10.1002/2013GL058220
Author(s): Marieni, Chiara; Henstock, Timothy J.; Teagle, Damon A. H.
Author Affiliation(s): Primary:
University of Southampton, Southampton, United Kingdom
Volume Title: Geophysical Research Letters
Source: Geophysical Research Letters, 40(23), p.6219-6224. Publisher: American Geophysical Union, Washington, DC, United States. ISSN: 0094-8276 CODEN: GPRLAJ
Note: In English. 36 refs.; illus., incl. 1 table
Summary: The rise of atmospheric carbon dioxide (CO2) principally due to the burning of fossil fuels is a key driver of anthropogenic climate change. Mitigation strategies include improved efficiency, using renewable energy, and capture and long-term sequestration of CO2. Most sequestration research considers CO2 injection into deep saline aquifers or depleted hydrocarbon reservoirs. Unconventional suggestions include CO2 storage in the porous volcanic lavas of uppermost oceanic crust. Here we test the feasibility of injecting CO2 into deep-sea basalts and identify sites where CO2 should be both physically and gravitationally trapped. We use global databases to estimate pressure and temperature, hence density of CO2 and seawater at the sediment-basement interface. At previously suggested sites on the Juan de Fuca Plate and in the eastern equatorial Pacific Ocean, CO2 is gravitationally unstable. However, we identify five sediment-covered regions where CO2 is denser than seawater, each sufficient for several centuries of anthropogenic CO2 emissions. Abstract Copyright (2013), The Authors. Geophysical Research Letters published by Wiley on behalf of the American Geophysical Union.
Year of Publication: 2013
Research Program: ODP Ocean Drilling Program
Key Words: 07 Marine Geology and Oceanography; Basalts; Carbon; Carbon cycle; Carbon dioxide; Carbon sequestration; Chemical composition; Crust; East Pacific; Fluid injection; Gas storage; Geochemical cycle; Igneous rocks; Juan de Fuca Ridge; Leg 168; Lithosphere; Marine sediments; North Pacific; Northeast Pacific; ODP Site 1026; ODP Site 1027; Ocean Drilling Program; Oceanic crust; Oceanic lithosphere; Pacific Ocean; Sea water; Sediments; Volcanic rocks
Coordinates: N474556 N474556 W1274526 W1274526
N474524 N474524 W1274351 W1274351
Record ID: 2014038897
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom