Zambezi Belt

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The Zambezi Belt is an area of orogenic deformation in southern Zambia and northern Zimbabwe. It is a segment of a broader belt lying between the Congo Craton and the Kalahari Craton, which also includes the Lufilian Arc and the . The eastern margin of the belt interacts with the north-south .[1]

The Zambezi belt shows evidence of two large tectonothermal events, one between about 890-880 Ma[fn 1] and the other about 550-520 Ma. Both events reworked existing Archean to Mesoproterozoic components, with small additions of younger material.[1] The second event was caused by the collision of the Congo and Kalahari cratons during the assembly of the Gondwana supercontinent at the end of the Neoproterozoic.[2] The belt includes the Kadunguri Whiteschists, which were formed by metasomatic alteration at high pressures of ocean-island-type metabasalts during the Pan-African orogeny.[1]

The Mwembeshi Shear Zone forms the northern boundary of the Zambezi Belt, separating it from the Lufilian Arc.[3] The shear zone also dates to the Pan-African orogeny. It allowed a change in the structural vergence, or direction of folding, between the Zambezi Belt and the Lufilian Arc.[4]

References[]

Notes
  1. ^ Ma = million years ago
Citations
  1. ^ a b c Johnson & Oliver 2002, pp. 271–290.
  2. ^ Hargrove et al. 2003, pp. 159–186.
  3. ^ Mumbwa Geology.
  4. ^ Yoshida, Windley & Dasgupta 2003, p. 418.
Sources
  • Hargrove, Ulysses S.; Hanson, Richard E.; Martin, Mark W.; Blenkinsop, Thomas G.; Bowring, Samuel A.; Walker, Nicholas; Munyanyiwa, Hubert (2003). "Tectonic evolution of the Zambezi orogenic belt: geochronological, structural, and petrological constraints from northern Zimbabwe". Precambrian Research. 123 (2–4): 159–186. doi:10.1016/s0301-9268(03)00066-4. Retrieved 2012-06-13.
  • Johnson, S. P.; Oliver, G. J. H. (2002). "High fO2 Metasomatism During Whiteschist Metamorphism, Zambezi Belt, Northern Zimbabwe". Journal of Petrology. 43 (2): 271–290. doi:10.1093/petrology/43.2.271. Retrieved 2012-06-13.
  • "Mumbwa Geology". Blackthorn Resources. Retrieved 2012-06-06.
  • Yoshida, Masaru; Windley, Brian F.; Dasgupta, Somnath (2003). Proterozoic East Gondwana: Supercontinent Assembly and Breakup. Geological Society. ISBN 978-1-86239-125-3.

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