THE METAMORPHIC HISTORY OF A SUBDUCTED SLAB: NEW INSIGHTS FROM THE CATALINA SCHIST

dc.contributor.advisorPenniston-Dorland, Sarah C.en_US
dc.contributor.authorTaylor, Alexander Theodoreen_US
dc.contributor.departmentGeologyen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2023-06-26T05:58:07Z
dc.date.available2023-06-26T05:58:07Z
dc.date.issued2023en_US
dc.description.abstractRocks exhumed from ancient subduction zone interfaces often contain both coherent terranes and block-in-matrix mélanges, but the relationship between these two endmembers and its implications for underplating have not been closely examined. The Catalina Schist is a Cretaceous paleosubduction complex on Santa Catalina Island (California) that contains an amphibolite facies mélange with an underlying unit of coherent amphibolite. In this thesis, I present a metamorphic history of the coherent amphibolite that is based on field and petrographic evidence and pressure-temperature estimates from Raman elastic barometry and trace element thermometry. Rocks from the coherent amphibolite record peak metamorphic conditions of 1.20 to 1.29 GPa and 665 to 691 °C. This is consistent with several amphibolite mélange blocks, but the range of block conditions suggests that some upwards movement of the coherent amphibolite may have occurred at the subduction interface prior to the current juxtaposition of the two units.en_US
dc.identifierhttps://doi.org/10.13016/dspace/cnlc-aziw
dc.identifier.urihttp://hdl.handle.net/1903/30245
dc.language.isoenen_US
dc.subject.pqcontrolledPetrologyen_US
dc.subject.pqcontrolledGeologyen_US
dc.subject.pquncontrolledCatalinaen_US
dc.subject.pquncontrolledGeologyen_US
dc.subject.pquncontrolledMelangeen_US
dc.subject.pquncontrolledMetamorphicen_US
dc.subject.pquncontrolledSubductionen_US
dc.subject.pquncontrolledTectonicsen_US
dc.titleTHE METAMORPHIC HISTORY OF A SUBDUCTED SLAB: NEW INSIGHTS FROM THE CATALINA SCHISTen_US
dc.typeThesisen_US

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