Paleomagnetism and Geochemistry of Basalts in the North American Cordillera, Davis Strait, and Antarctica

• Main Author: Biasi, Joseph Anthony
• Format: Thesis
• Language: English
• Published: California Institute of Technology 2021
• Subjects: ophiolite; north atlantic; paleomagnetism; igneous; Geochemistry; FOS Earth and related environmental sciences; volcanology; dike; Basalt; petrology; large igneous province; volcano; mass extinction; flood basalt; magnetic field; Antarctic; The Antarctic; Antarctic Peninsula; Baffin Island; Ross Island; Hess; Antarc*; Antarctica; Baffin; Brooks Range; Davis Strait; James Ross Island; North Atlantic
• Online Access: https://dx.doi.org/10.7907/hbs7-aw47; https://resolver.caltech.edu/CaltechTHESIS:06022021-013516525

Chapter 1 is an introduction to the thesis and contains a brief summary on how the chapters relate to each other. In Chapter 2, we present new whole-rock geochemical data from the Brooks Range Ophiolite (BRO) together with new mineral chemistry data from the BRO, South Sandwich forearc, Izu-Bonin forearc, and Hess Deep. In Chapter 3, we use a combination of paleomagnetic data and thermal modeling to create a magnetic geothermometer (MGT) that can constrain the active transport lifetime of magmatic conduits and igneous intrusions. In Chapter 4, we present new stratigraphic and paleomagnetic data from Paleocene flood basalts on Baffin Island. In Chapter 5, we present new paleomagnetic and paleointensity data from the James Ross Island volcanic group, located on the Antarctic Peninsula.