Evaluation of ocean crustal Sites 1256 and 504 for long-term CO2 sequestration

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doi: 10.1029/2011GL048613
Author(s): Slagle, Angela L.; Goldberg, David S.
Author Affiliation(s): Primary:
Lamont-Doherty Earth Observatory, Palisades, NY, United States
Volume Title: Geophysical Research Letters
Source: Geophysical Research Letters, 38(16). Publisher: American Geophysical Union, Washington, DC, United States. ISSN: 0094-8276 CODEN: GPRLAJ
Note: In English. 25 refs.; illus., incl. 1 table, geol. sketch map
Summary: Geologic storage of CO2 in ocean basalt reservoirs is a potentially long-term solution to offset anthropogenic greenhouse gas emissions. Prior drilling at Deep Sea Drilling Project (DSDP)/Ocean Drilling Program (ODP)/Integrated Ocean Drilling Program (IODP) Sites 1256 and 504 provides evidence that the extrusive ocean crust has sufficient porosity and permeability to enable storage of large volumes of CO2. Six intervals are identified as potential reservoirs in the shallow crust at Sites 1256 and 504, with new and reprocessed estimates of porosity from electrical resistivity logs ranging from 6% to 14% and permeability from ∼10-14 to 10-15 m2. Calculations using specific reservoir thickness and porosity estimates suggest that even the smallest reservoir could provide storage capacity for decades of global anthropogenic carbon emissions. In situ hydrologic experiments and pilot injection studies are needed to confirm high permeability and porosity estimates at Sites 1256 and 504, as well as the potential for CO2 injection and retention in these basalt reservoirs.
Year of Publication: 2011
Research Program: DSDP Deep Sea Drilling Project
IODP Integrated Ocean Drilling Program
ODP Ocean Drilling Program
Key Words: 30 Engineering Geology; Basalts; Carbon dioxide; Carbon sequestration; Carnegie Ridge; Cocos Ridge; Crust; DSDP Site 504; Deep Sea Drilling Project; East Pacific; Equatorial Pacific; Igneous rocks; Integrated Ocean Drilling Program; Leg 148; Lithosphere; Mid-ocean ridge basalts; Nazca Ridge; North Pacific; Northeast Pacific; ODP Site 1256; Ocean Drilling Program; Oceanic crust; Oceanic lithosphere; Pacific Ocean; Site exploration; South Pacific; Southeast Pacific; Volcanic rocks
Coordinates: N064400 N064400 W0915600 W0915600
N011335 N011338 W0834348 W0834357
Record ID: 2012023875
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