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Paleomagnetism of Miocene Volcanic Rocks in the Mojave Region of Southeastern California
AuthorActon, Gary Dean
KeywordsPaleomagnetism -- California -- Mojave Region
Igneous rocks -- California -- Mojave Region
Rocks -- California -- Mojave Region -- Magnetic properties
Plate tectonics -- California -- Mojave Region
Committee ChairButler, Robert F.
MetadataShow full item record
PublisherThe University of Arizona.
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AbstractPaleomagnetic data were collected from Miocene volcanic rocks in the Turtle Mountains, Clipper Mountain, Colton Hills, and Piute Range of the southern Basin and Range (SBR) province in southeastern California as well as in the Soledad Mountains of the Mojave block in southern California. The data from these two tectonic provinces yield significantly different paleomagnetic directions, which probably indicates the existence of a major crustal and /or lithospheric discontinuity in the area between the Barstow Basin and the Clipper Mountain. Comparing the mean direction from the SBR data to the Miocene expected direction indicates no statistically significant rotation (R = -0.2° ± 18.2°) or flattening (F = -6.5° ± 9.2°). A similar comparison for the Soledad Mountain data, which were combined with data of Burke et al. (1982) from the Barstow Basin, yields a significant rotation of -43.5° ± 12.9° and flattening of 19.3° ± 10.6° for the Mojave block. These Mojave block values may be exaggerated a few degrees due to inadequate averaging of secular variation and possible improper structural corrections.
Degree ProgramGraduate College