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dc.contributor.advisorHanson, Richard E.
dc.contributor.authorHill, Jennifer Anneen_US
dc.date.accessioned2014-08-12T18:45:38Z
dc.date.available2014-08-12T18:45:38Z
dc.date.created2014en_US
dc.date.issued2014en_US
dc.identifierUMI thesisen_US
dc.identifierumi-10515en_US
dc.identifiercat-002173089en_US
dc.identifier.urihttps://repository.tcu.edu/handle/116099117/6046
dc.description.abstractAn episode of explosive Eocene basaltic phreatomagmatic volcanism has recently been discovered within the Trans-Pecos Magmatic Province in west Texas. The study area focuses on basaltic rocks formed partly during this episode east of Pe??a Mountain, within Big Bend National Park. Hypabyssal systems consisting of three units of diabase, Type I, II, and III, as well as outcrops of the regional Alamo Creek Basalt are present in the study area. Phreatomagmatic vent-fill outcrops are intruded by diabase and contain bombs geochemically related to the Type I intrusion and the Alamo Creek Basalt, which have 40Ar/39Ar dates of ~ 47 Ma. The Type II intrusion has not been dated, but is geochemically similar to other intrusive basalts in the region with ages of ~ 43-42 Ma. The voluminous Type III intrusion, with 40Ar/39Ar dates of ~ 34 Ma, has partly obscured the phreatomagmatic vents and was not involved in explosive volcanism.en_US
dc.format.mediumFormat: Onlineen_US
dc.publisher[Fort Worth, Tex.] : Texas Christian University,en_US
dc.relation.ispartofTCU Master Thesisen_US
dc.relation.requiresMode of access: World Wide Web.en_US
dc.relation.requiresSystem requirements: Adobe Acrobat reader.en_US
dc.titleComplex Eocene-Oligocene hypabyssal intrusive systems associated with basaltic phreatomagmatic vents in the area east of Pe?a Mountain, Big Bend National Park, West Texasen_US
dc.typeTexten_US
etd.degree.departmentDepartment of Geology, Energy, and the Environment
local.collegeCollege of Science and Engineering
local.departmentGeological Sciences
local.academicunitSchool of Geology, Energy and the Environment
dc.type.genreThesis
local.subjectareaGeological Sciences
etd.degree.nameMaster of Science


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