Paleomagnetism of neoproterozoic intraplate igneous rocks in the southwest Kalahari craton, Namibia and South Africa [electronic resource] /Show full item record
|Title||Paleomagnetism of neoproterozoic intraplate igneous rocks in the southwest Kalahari craton, Namibia and South Africa [electronic resource] /|
|Author||Bartholomew, Leigh Taylor|
|Abstract||Currently no reliable paleomagnetic pole for the Kalahari craton exists for the time period ~900-750 Ma, and it is the purpose of this thesis to acquire the first such pole. Here I report the results of paleomagnetic analyses from 47 sites from Neoproterozoic rocks within the Richtersveld Igneous Complex (~890 Ma), the older Bremen Complex (~890 Ma), and the Gannakouriep dike swarm (~795-790 Ma) within southern Namibia and adjacent parts of South Africa. The resulting grand mean pole obtained for the Kalahari craton lies at 73.9°N, 233.9°E (A95 = 4.5°). Comparison with published paleomagnetic poles from rock units of similar age from the Congo craton to the north supports a model in which the two cratons were originally separated by a wide ocean basin prior to the formation of the Gondwana supercontinent. However, additional work from the Congo craton is needed to test this hypothesis.|
|Description||Title from thesis title page (viewed Mar. 22, 2010).
Thesis--Texas Christian University, 2008.
Department of Geology; advisor, Richard E. Hanson.
Includes bibliographical references.
Text (electronic thesis) in PDF.
This item appears in the following Collection(s)
- Theses and Dissertations