Show simple item record

dc.contributor.authorMervine, Evelyn M.
dc.coverage.spatialSultanate of Oman
dc.date.accessioned2012-07-26T19:03:38Z
dc.date.available2012-07-26T19:03:38Z
dc.date.issued2012-06
dc.identifier.urihttp://hdl.handle.net/1912/5279
dc.descriptionSubmitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution June 2012en_US
dc.description.abstractDetermining timescales of the formation and preservation of carbonate alteration products in mantle peridotite is important in order to better understand the role of this potentially important sink in the global carbon cycle and also to evaluate the feasibility of using artificially-enhanced, in situ formation of carbonates in peridotite to mitigate the buildup of anthropogenic CO2 emissions in the atmosphere. Timescales of natural carbonation of peridotite were investigated in the mantle layer of the Samail Ophiolite, Sultanate of Oman. Rates of ongoing, low-temperature CO2 uptake were estimated through 14C and 230Th dating of carbonate alteration products. Approximately 1-3 x 106 kg CO2/yr is sequestered in Ca-rich surface travertines and approximately 107 kg CO2/yr is sequestered in Mg-rich carbonate veins. Rates of CO2 removal were estimated through calculation of maximum erosion rates from cosmogenic 3He measurements in partiallyserpentinized peridotite bedrock associated with carbonate alteration products. Maximum erosion rates for serpentinized peridotite bedrock are ~5 to 180 m/Myr (average: ~40 m/Myr), which removes at most 105-106 kg CO2/yr through erosion of Mg-rich carbonate veins.en_US
dc.description.sponsorshipMy PhD thesis research was funded by the National Science Foundation grant EAR-1049281, the Deep Ocean Exploration Institute at WHOI, the Academic Programs Office at WHOI, and the Mellon Foundation.en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherMassachusetts Institute of Technology and Woods Hole Oceanographic Institutionen_US
dc.relation.ispartofseriesWHOI Thesesen_US
dc.subjectCarbon dioxide sinksen_US
dc.subjectPeridotiteen_US
dc.titleDetermining timescales of natural carbonation of peridotite in the Samail Ophiolite, Sultanate of Omanen_US
dc.typeThesisen_US
dc.identifier.doi10.1575/1912/5279


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record