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Large igneous provinces and Earth’s carbon cycle

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TitleInfo
Title
Large igneous provinces and Earth’s carbon cycle
SubTitle
lessons from the late Triassic and rapidly emplaced Central Atlantic Magmatic Province
Name (type = personal)
NamePart (type = family)
Schaller
NamePart (type = given)
Morgan Frederick
NamePart (type = date)
1982-
DisplayForm
Morgan Schaller
Role
RoleTerm (authority = RULIB)
author
Name (type = personal)
NamePart (type = family)
Kent
NamePart (type = given)
Dennis V
DisplayForm
Dennis V Kent
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
chair
Name (type = personal)
NamePart (type = family)
Wright
NamePart (type = given)
James D
DisplayForm
James D Wright
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = personal)
NamePart (type = family)
Schlische
NamePart (type = given)
Roy W
DisplayForm
Roy W Schlische
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = personal)
NamePart (type = family)
Olsen
NamePart (type = given)
Paul E
DisplayForm
Paul E Olsen
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
outside member
Name (type = corporate)
NamePart
Rutgers University
Role
RoleTerm (authority = RULIB)
degree grantor
Name (type = corporate)
NamePart
Graduate School - New Brunswick
Role
RoleTerm (authority = RULIB)
school
TypeOfResource
Text
Genre (authority = marcgt)
theses
OriginInfo
DateCreated (qualifier = exact)
2012
DateOther (qualifier = exact); (type = degree)
2012-01
CopyrightDate (qualifier = exact)
2012
Place
PlaceTerm (type = code)
xx
Language
LanguageTerm (authority = ISO639-2b); (type = code)
eng
Abstract (type = abstract)
Using stable carbon isotopes of soil carbonates, I demonstrate that the eruption of the Central Atlantic Magmatic Province (CAMP) resulted in a transient perturbation of atmospheric pCO2 in the Late Triassic. I show evidence of a discrete pCO2 pulse (roughly a doubling) immediately after the first CAMP flow-unit preserved in the Newark rift basin, followed by a ~200 kyr falloff toward pre-eruptive concentrations, a pattern repeated above the second and third flow-units. Observations from the Hartford basin indicate that pCO2 had fallen to concentrations well below background by 400 kyr after the final eruptions in the earliest Jurassic. I use a simple geochemical model to demonstrate that this decrease below pre-eruptive background is most easily accomplished by the extrusion of ~1.12 x 107 km2 of basalt into the equatorial humid belt, which effectively amplified the increase in global continental weathering rate by perhaps as much as 50%. These results indicate that LIPs can be overall net sinks for CO2. A test of the Late Triassic equilibrium state from a 33-My record of pCO2 broadly shows a ~3-fold decrease from the Carnian through the Rhaetian. This pCO2 decrease is most consistent with the hypothesis that a Late-Triassic increase in continental area within the tropical humid belt, as a result of the slow northward migration of the Pangean Supercontinent, lead to increased rates of continental weathering and CO2 consumption. A significant implication of this finding is that changes in degassing rate from variable ocean crust production are not driving the long-term decrease in pCO2 because crustal production rates show little variability through the Late Triassic. Together, the results of this work lay the foundation for a revision of our understanding regarding the driving mechanisms behind Earth’s long-term carbon cycle toward a greater emphasis on weathering processes.
Subject (authority = RUETD)
Topic
Geological Sciences
RelatedItem (type = host)
TitleInfo
Title
Rutgers University Electronic Theses and Dissertations
Identifier (type = RULIB)
ETD
Identifier
ETD_3732
PhysicalDescription
Form (authority = gmd)
electronic resource
InternetMediaType
application/pdf
InternetMediaType
text/xml
Extent
xii, 140 p. : ill., maps
Note (type = degree)
Ph.D.
Note (type = bibliography)
Includes bibliographical references
Note (type = vita)
Includes vita
Note (type = statement of responsibility)
by Morgan Frederick Schaller
Subject (authority = ETD-LCSH)
Topic
Earth temperature
Subject (authority = ETD-LCSH)
Topic
Geology, Stratigraphic--Triassic
Subject (authority = ETD-LCSH)
Topic
Geology, Stratigraphic--Jurassic
Identifier (type = hdl)
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000064172
RelatedItem (type = host)
TitleInfo
Title
Graduate School - New Brunswick Electronic Theses and Dissertations
Identifier (type = local)
rucore19991600001
Location
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NjNbRU
Identifier (type = doi)
doi:10.7282/T3R78D8X
Genre (authority = ExL-Esploro)
ETD doctoral
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Rights

RightsDeclaration (ID = rulibRdec0006)
The author owns the copyright to this work.
RightsHolder (type = personal)
Name
FamilyName
Schaller
GivenName
Morgan
Role
Copyright Holder
RightsEvent
Type
Permission or license
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2011-12-15 08:50:59
AssociatedEntity
Name
Morgan Schaller
Role
Copyright holder
Affiliation
Rutgers University. Graduate School - New Brunswick
AssociatedObject
Type
License
Name
Author Agreement License
Detail
I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
RightsEvent
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2012-01-31
DateTime (encoding = w3cdtf); (qualifier = exact); (point = end)
2012-08-01
Type
Embargo
Detail
Access to this PDF has been restricted at the author's request. It will be publicly available after August 1st, 2012.
Copyright
Status
Copyright protected
Availability
Status
Open
Reason
Permission or license
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