Crustal domains in the northern Kaapvaal Craton as defined by magnetic lineaments

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doi: 10.1016/0301-9268(89)90065-X
Authors:Stettler, E. H.; De Beer, J. H.; Blom, M. P.
Author Affiliations:Primary:
Geol. Surv., Geophys. Div., Pretoria, South Africa
Other:
Natl. Phys. Res. Lab., South Africa
Volume Title:Precambrian Research
Source:Precambrian Research, 45(4), p.263-276. Publisher: Elsevier, Amsterdam, International. ISSN: 0301-9268
Publication Date:1989
Note:In English. 43 refs.; illus. incl. 1 table, geol. sketch maps
Summary:The N part of the Kaapvaal craton and Limpopo belt can be subdivided into domains on the basis of aeromagnetic lineament patterns. These subdivisions reflect the differing tectonic histories of parts of the lithosphere and many correlate with known metamorphic-tectonic provinces. The dykes causing the lineation pattern intruded intermittently over a very long period of time, their trend within a domain being determined by the stress field operative at the time of intrusion and also by an inherited fracture pattern in that domain. The event that introduced the fracture pattern has to be greater than or equal to 2456 m.y. and greater than or equal to 2603 m.y. ago. Data show that a 15 degrees anticlockwise rotation of the central zone of the Limpopo belt with respect to the S marginal zone will restore parallelism in the fracture pattern of the two domains. The presence of the greenstone belts has no effect on the dyke pattern, and domain boundaries cut across these structures. [R.E.S.]
Subjects:Airborne methods; Cratons; Geophysical methods; Geophysical surveys; Lineaments; Magnetic anomalies; Magnetic methods; Paleoproterozoic; Patterns; Precambrian; Proterozoic; Structural geology; Surveys; Tectonics; Upper Precambrian; Africa; Kaapvaal Craton; Limpopo Belt; South Africa; Southern Africa; Transvaal region; Transvaal South Africa
Abstract Numbers:90M/3420
Record ID:1990008437
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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