Magnetic Properties of the Bishop Ash in the San Andreas Fault Borderlands

Title:
Magnetic Properties of the Bishop Ash in the San Andreas Fault Borderlands
Authors:
Strauss, Becky
Abstract:
The San Andreas Fault marks one of the most tectonically active regions of the United States, producing frequent earthquakes that have decimated major population centers throughout central and southern California. Its northern regions have been thoroughly studied, but the complex behavior of the southeast portion of the fault is often neglected, in spite of its potential to nucleate a major earthquake within the next few centuries. In this study, I examined the magnetic traits of the Bishop Ash, a well-dated marker horizon of volcanic ash, to assess deformation adjacent to this part of the fault at hand-sample scale. To this end, I first characterized the magnetic properties of the Ash and found that while magnetite is present in small concentrations, the anisotropy of magnetic susceptibility (AMS) is controlled by the crystallographic fabric of paramagnetic minerals. The scatter of anisotropy axes implies that individual grains may have been slightly reoriented during deformation. I also attempted to use magnetic remanence to determine whether significant vertical axis reorientation has occurred since initial deposition; however, the recorded remanence is likely a chemical remanent magnetization (CRM) acquired after deposition.
Citation:
Strauss, Becky. “Magnetic Properties of the Bishop Ash in the San Andreas Fault Borderlands.” Honors thesis, Oberlin College, 2011.
Type:
Thesis
Degree Level:
Bachelor of Arts
Discipline:
Geology
Degree Year:
2011
Notes:
CLICK THE LINK BELOW TO REQUEST THIS THESIS
Additional Links:
http://www.oberlinlibstaff.com/testform.2.html
PERMANENT LINK:
http://hdl.handle.net/11282/581239

Full metadata record

DC FieldValue Language
dc.contributor.authorStrauss, Beckyen
dc.date.accessioned2015-10-26T13:40:15Zen
dc.date.available2015-10-26T13:40:15Zen
dc.date.issued1905-07-03en
dc.identifier.citationStrauss, Becky. “Magnetic Properties of the Bishop Ash in the San Andreas Fault Borderlands.” Honors thesis, Oberlin College, 2011.en
dc.identifier.urihttp://hdl.handle.net/11282/581239en
dc.description.abstractThe San Andreas Fault marks one of the most tectonically active regions of the United States, producing frequent earthquakes that have decimated major population centers throughout central and southern California. Its northern regions have been thoroughly studied, but the complex behavior of the southeast portion of the fault is often neglected, in spite of its potential to nucleate a major earthquake within the next few centuries. In this study, I examined the magnetic traits of the Bishop Ash, a well-dated marker horizon of volcanic ash, to assess deformation adjacent to this part of the fault at hand-sample scale. To this end, I first characterized the magnetic properties of the Ash and found that while magnetite is present in small concentrations, the anisotropy of magnetic susceptibility (AMS) is controlled by the crystallographic fabric of paramagnetic minerals. The scatter of anisotropy axes implies that individual grains may have been slightly reoriented during deformation. I also attempted to use magnetic remanence to determine whether significant vertical axis reorientation has occurred since initial deposition; however, the recorded remanence is likely a chemical remanent magnetization (CRM) acquired after deposition.en
dc.relation.urlhttp://www.oberlinlibstaff.com/testform.2.htmlen
dc.titleMagnetic Properties of the Bishop Ash in the San Andreas Fault Borderlandsen
dc.typeThesisen
thesis.degree.levelBachelor of Artsen
thesis.degree.disciplineGeologyen
thesis.degree.year2011en
dc.description.notesCLICK THE LINK BELOW TO REQUEST THIS THESISen
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