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Samuel A. Bowring. Blackburn, Terrence (Terrence Joseph) Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences. Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences 2013-04-12T15:14:29Z 2013-04-12T15:14:29Z 2012 2012 http://hdl.handle.net/1721.1/78366 834119953 Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 2012. This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections. Cataloged from student-submitted PDF version of thesis. Includes bibliographical references. Radioisotopic dating can provide critical constraints for understanding the rates of tectonic, dynamic and biologic processes operating on our planet. Improving the interpretation and implementation of geochronologic data by coupling it with numerical modeling studies is the central theme of this thesis. Each chapter works to address a variety of problems in the Earth sciences. In each study, the interpretation of geochronologic data is aided with a numerical model that simulates the long-term behavior and/or initial conditions of the U-Pb system and provides an effective means of exploring the parameters that influence a calculated date. The record provided by geochronologic data is then coupled with models to quantitatively determine rates of geologic process on Earth. This approach permits geochronologic data to move beyond just establishing a relative time line of events. Using this dual modeling approach, Chapters 2-5 work to measure the long-term cooling and erosion rate of the lithosphere, specifically constraining the time scales and rate of transition between the stages of mountain belt formation and stability. Chapter six works to constrain the timing and duration of Central Atlantic Magmatic Province flood basalt volcanism and its relationship to the end Triassic mass extinction. The seventh and final chapter uses high precision U-Pb geochronology to evaluate the reliability of an Ar-Ar standard often used as a fluence monitor. The overall focus of this thesis has been to push the envelope of geochronologic precision and accuracy while coupling the data with modeling studies to yield new insight into Earth systems. by Terrence Blackburn. Ph.D. 180 p. eng Massachusetts Institute of Technology M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 Earth, Atmospheric, and Planetary Sciences. Integrating high-precision U-Pb geochronologic data with dynamic models of earth processes Thesis application/pdf false Publication unknown unknown <Publication xmlns="https://www.openaire.eu/cerif-profile/1.1/" id="9e5f3df5-0676-43b5-9f00-e01bbe82bfbb"> <Type xmlns="https://www.openaire.eu/cerif-profile/vocab/COAR_Publication_Types">http://purl.org/coar/resource_type/c_1843</Type> <Language>eng</Language> <Title>Integrating high-precision U-Pb geochronologic data with dynamic models of earth processes</Title> <PublishedIn> <Publication> </Publication> </PublishedIn> <PublicationDate>2012</PublicationDate> <Authors> <Author> <DisplayName>Blackburn, Terrence (Terrence Joseph)</DisplayName> <Affiliation> <OrgUnit> </OrgUnit> </Affiliation> </Author> </Authors> <Editors> </Editors> <Publishers> <Publisher> <DisplayName>Massachusetts Institute of Technology</DisplayName> <OrgUnit /> </Publisher> </Publishers> <License>http://dspace.mit.edu/handle/1721.1/7582</License> <Keyword>Earth, Atmospheric, and Planetary Sciences.</Keyword> <Abstract>Radioisotopic dating can provide critical constraints for understanding the rates of tectonic, dynamic and biologic processes operating on our planet. Improving the interpretation and implementation of geochronologic data by coupling it with numerical modeling studies is the central theme of this thesis. Each chapter works to address a variety of problems in the Earth sciences. In each study, the interpretation of geochronologic data is aided with a numerical model that simulates the long-term behavior and/or initial conditions of the U-Pb system and provides an effective means of exploring the parameters that influence a calculated date. The record provided by geochronologic data is then coupled with models to quantitatively determine rates of geologic process on Earth. This approach permits geochronologic data to move beyond just establishing a relative time line of events. Using this dual modeling approach, Chapters 2-5 work to measure the long-term cooling and erosion rate of the lithosphere, specifically constraining the time scales and rate of transition between the stages of mountain belt formation and stability. Chapter six works to constrain the timing and duration of Central Atlantic Magmatic Province flood basalt volcanism and its relationship to the end Triassic mass extinction. The seventh and final chapter uses high precision U-Pb geochronology to evaluate the reliability of an Ar-Ar standard often used as a fluence monitor. The overall focus of this thesis has been to push the envelope of geochronologic precision and accuracy while coupling the data with modeling studies to yield new insight into Earth systems.</Abstract> <Access xmlns="http://purl.org/coar/access_right" > </Access> </Publication>