Thermal Processing in Ordinary Chondrites: Development of the Fast Electron Microprobe (FEM) Technique For Measuring Heterogeneity of Ferromagnesian Silicates

Persistent Link:
http://hdl.handle.net/10150/193378
Title:
Thermal Processing in Ordinary Chondrites: Development of the Fast Electron Microprobe (FEM) Technique For Measuring Heterogeneity of Ferromagnesian Silicates
Author:
Marsh, Celinda Anne
Issue Date:
2007
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
I have developed a technique that improves the speed, reproducibility, and sensitivity of the measurement of degree of equilibration in ordinary chondrites. The Fast Electron Microprobe technique (FEM) technique provides a continuous quantitative scale for the amount of thermal processing a particular sample has experienced. The Fast Electron Microprobe technique (FEM) allows us to quickly collect sufficient data to determine the homogeneity and composition of olivine and low-Ca pyroxene in ordinary chondrite thin sections. I have studied several meteorites that are homogenous in olivine composition, but heterogeneous in low-Ca pyroxene composition. One of these samples (ALH 85033) has previously been classified as an L4. The FEM technique allows reproducible measurements of the degree of thermal metamorphism in ordinary chondrites, improving our understanding of thermal processing of asteroids in the early solar system.
Type:
text; Electronic Thesis
Keywords:
thermal equilibration; ordinary chondrites; meteorites; electron microprobe
Degree Name:
MS
Degree Level:
masters
Degree Program:
Planetary Sciences; Graduate College
Degree Grantor:
University of Arizona
Advisor:
Lauretta, Dante S
Committee Chair:
Lauretta, Dante S

Full metadata record

DC FieldValue Language
dc.language.isoENen_US
dc.titleThermal Processing in Ordinary Chondrites: Development of the Fast Electron Microprobe (FEM) Technique For Measuring Heterogeneity of Ferromagnesian Silicatesen_US
dc.creatorMarsh, Celinda Anneen_US
dc.contributor.authorMarsh, Celinda Anneen_US
dc.date.issued2007en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractI have developed a technique that improves the speed, reproducibility, and sensitivity of the measurement of degree of equilibration in ordinary chondrites. The Fast Electron Microprobe technique (FEM) technique provides a continuous quantitative scale for the amount of thermal processing a particular sample has experienced. The Fast Electron Microprobe technique (FEM) allows us to quickly collect sufficient data to determine the homogeneity and composition of olivine and low-Ca pyroxene in ordinary chondrite thin sections. I have studied several meteorites that are homogenous in olivine composition, but heterogeneous in low-Ca pyroxene composition. One of these samples (ALH 85033) has previously been classified as an L4. The FEM technique allows reproducible measurements of the degree of thermal metamorphism in ordinary chondrites, improving our understanding of thermal processing of asteroids in the early solar system.en_US
dc.typetexten_US
dc.typeElectronic Thesisen_US
dc.subjectthermal equilibrationen_US
dc.subjectordinary chondritesen_US
dc.subjectmeteoritesen_US
dc.subjectelectron microprobeen_US
thesis.degree.nameMSen_US
thesis.degree.levelmastersen_US
thesis.degree.disciplinePlanetary Sciencesen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorLauretta, Dante Sen_US
dc.contributor.chairLauretta, Dante Sen_US
dc.identifier.proquest2500en_US
dc.identifier.oclc659748460en_US
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