Show simple item record

dc.creatorRowe, Honore Deborah
dc.date.accessioned 2007-08-20T23:51:38Z
dc.date.available 2007-08-20T23:51:38Z
dc.date.issued 1998
dc.identifier.urihttps://hdl.handle.net/1911/17208
dc.description.abstract Subduction of an oceanic plate beneath the Bering Strait region resulted in the formation of an extensive magmatic belt along the margin of the region during the Cretaceous. Plutons and gneiss domes of this age are broadly distributed throughout parts of the region, in Chukotka, Russia and in Alaska. Variably deformed biotite granite and related diorite through tonalite dikes intrude all levels of the Koolen gneiss dome in NE Chukotka. Granodiorite and granite plutons and associated mafic hypabyssals form a cauldera assemblage at the eastern tip of the Okhotsk-Chukotsk volcanic belt in SE Chukotka. Mafic rocks from both localities show trace element characteristics indicative of subduction-related magmatism, including LILE enrichement and Nb and Ti depletion. All rocks from both localities classify as high-K calc-alkaline rocks and have comparably enriched REE concentrations. These characteristics, along with enriched isotope ratios, suggest derivation of the mafic rocks from enriched subcontinental mantle. At both field areas, mantle-derived magma, produced during subduction processes, intruded lower crustal levels and differentiated. (Abstract shortened by UMI.)
dc.format.mimetype application/pdf
dc.language.iso eng
dc.subjectGeology
Geochemistry
dc.title Petrogenesis of plutons and hypabyssal rocks of the Bering Strait region, Chukotka, Russia
dc.type.genre Thesis
dc.type.material Text
thesis.degree.department Earth Science
thesis.degree.discipline Natural Sciences
thesis.degree.grantor Rice University
thesis.degree.level Masters
thesis.degree.name Master of Arts
dc.identifier.citation Rowe, Honore Deborah. "Petrogenesis of plutons and hypabyssal rocks of the Bering Strait region, Chukotka, Russia." (1998) Master’s Thesis, Rice University. https://hdl.handle.net/1911/17208.


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record