Enon is an anomalous stony-iron meteorite having an affinity to both achondrites and ordinary chondrites. This study uses mineral chemistry, oxygen isotopes, and two-pyroxene geothermometry to understand Enon's formation history and to determine if it can be genetically related to any other known meteorite group. SEM mineral maps were used to identify texture and mineralogy, and detailed chemical analyses were obtained by electron microprobe. Oxygen isotope data was collected by analyzing powered olivine by infrared laser-assisted fluorination. The program QUILF was used to calculate the two-pyroxene closure temperature for Enon. Results indicate that Enon has approximately chondritic silicate compositions; an oxygen isotope composition similar to mesosiderites/HEDs; and experienced partial melting at the Fe, Ni-FeS eutectic and silicate recrystallization and major-element equilibration. This study suggests that Enon is a primitive achondrite that records the onset of igneous differentiation of its parent body.
| Identifer | oai:union.ndltd.org:TCU/oai:etd.tcu.edu:etd-12192013-125600 |
| Date | 19 December 2013 |
| Creators | Garcia, Sarah Lynn |
| Contributors | Rhiannon G Mayne, Helge Alsleben, Arthur Busbey |
| Publisher | Texas Christian University |
| Source Sets | Texas Christian University |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf, application/zip |
| Source | http://etd.tcu.edu/etdfiles/available/etd-12192013-125600/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to TCU or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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