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dc.creatorGose, Wulf A.
dc.creatorHanson, Richard E.
dc.creatorDalziel, Ian W. D.
dc.creatorPancake, James A.
dc.creatorSeidel, Emily K.
dc.date.accessioned2018-06-01T15:56:57Z
dc.date.available2018-06-01T15:56:57Z
dc.date.issued2006-09-20
dc.identifier.urihttps://doi.org/10.1029/2005JB003897
dc.identifier.urihttps://repository.tcu.edu/handle/116099117/21907
dc.identifier.urihttps://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2005JB003897
dc.description.abstractThe Umkondo dolerites are present over a wide area in the Kalahari craton, southern Africa. Thirty-nine sampling sites in Botswana and South Africa yielded tightly grouped paleomagnetic directions due south with shallow inclinations and three sites of opposite polarity. The dolerites have U-Pb single-crystal baddeleyite or zircon crystallization ages of 1112 ± 0.5 to 1108 ± 0.9 Ma. These results can be combined with published data from 39 additional Umkondo sites and 33 sites in the Grunehogna Province of Antarctica after restoring East Antarctica to its position next to southern Africa. Grouping the sites geographically yields 10 site mean poles with mean at 64.0°N, 38.8°E, A95 = 3.7°. This Umkondo pole can be correlated with Keweenawan poles from Laurentia. Because both sets of poles are precisely of the same age as well as predominantly of one polarity, the relative orientation of the two cratons within the Rodinia supercontinent is fixed. This implies that the Namaqua-Natal-Maud belt which rims the southern part of the Kalahari craton, faced away from Laurentia. The Umkondo pole combined with published poles suggest that the Kalahari craton remained distinctly south of the Laurentian craton between 1.1 and 1.0 Ga, making it highly unlikely that the two cratons collided.
dc.language.isoenen_US
dc.publisherWiley
dc.rights.urihttps://publications.agu.org/open-access/
dc.sourceJournal of Geophysical Research: Solid Earth
dc.subjectpaleomagnetism
dc.subjectPrecambrian
dc.subjectKalahari craton
dc.titlePaleomagnetism of the 1.1 Ga Umkondo large igneous province in southern Africa
dc.typeArticle
dc.rights.holderWulf A. Gose et al.
dc.rights.licenseAGU allows final articles to be placed in an institutional repository 6 months after publication, and allows submitted articles to be accessible on the author's personal website. AGU also supports governmental and institutional repositories and access is available to AGU content through CHORUS, usually 12 months after publication.
local.collegeCollege of Science and Engineering
local.departmentGeological Sciences
local.personsGose, Hanson (GEOL)


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