Kgaswane, EMNyblade, AAJulià, JDirks, PHGMWebb, SJ2012-11-212012-11-212012-07Kgaswane, E.M, Nyblade, A.A, Durrheim, R.J, Julià, J, Dirks, P.H.G.M and Webb, S.J. 2012. Shear wave velocity structure of the Bushveld Complex, South Africa. Tectonophysics, Vol. 554-557, pp. 83-1040040-1951http://www.sciencedirect.com/science/article/pii/S0040195112003095http://hdl.handle.net/10204/6348Copyright: This is an Open Access article, and is publicly available.The structure of the crust in the environs of the Bushveld Complex has been investigated by jointly inverting high-frequency teleseismic receiver functions and 2–60 s period Rayleigh wave group velocities for 16 broadband seismic stations located across the Bushveld Complex. Group velocities for 2–15 s periods were obtained from surface wave tomography using local and regional events, while group velocities for 20–60 s periods were taken from a published model. 1-D shear wave velocity models obtained for each station show the presence of thickened crust in the center of the Bushveld Complex and a region at the base of the crust where shear wave velocities exceed 4.0 km/s. The shear wave velocity models also suggest that velocities in some upper crustal layers may be as high as 3.7–3.8 km/s, consistent with the presence of mafic lithologies. These results favor a continuous-sheet model for the Bushveld Complex in which the outcropping mafic layers of the western and eastern limbs are continuous at depth beneath the center of the complex. However, detailed modeling of receiver functions at one station within the center of the complex indicates that the mafic layering may be locally disrupted due to thermal diapirism triggered by the emplacement of the Bushveld Complex or thermal and tectonic reactivation at a later time.enBushveld ComplexContinuous-sheet modelDipping-sheet modelJoint inversionReceiver functionsRayleigh wave group velocitiesArticleKgaswane, E., Nyblade, A., Julià, J., Dirks, P., & Webb, S. (2012). Shear wave velocity structure of the Bushveld Complex, South Africa. http://hdl.handle.net/10204/6348Kgaswane, EM, AA Nyblade, J Julià, PHGM Dirks, and SJ Webb "Shear wave velocity structure of the Bushveld Complex, South Africa." (2012) http://hdl.handle.net/10204/6348Kgaswane E, Nyblade A, Julià J, Dirks P, Webb S. Shear wave velocity structure of the Bushveld Complex, South Africa. 2012; http://hdl.handle.net/10204/6348.TY - Article AU - Kgaswane, EM AU - Nyblade, AA AU - Julià, J AU - Dirks, PHGM AU - Webb, SJ AB - The structure of the crust in the environs of the Bushveld Complex has been investigated by jointly inverting high-frequency teleseismic receiver functions and 2–60 s period Rayleigh wave group velocities for 16 broadband seismic stations located across the Bushveld Complex. Group velocities for 2–15 s periods were obtained from surface wave tomography using local and regional events, while group velocities for 20–60 s periods were taken from a published model. 1-D shear wave velocity models obtained for each station show the presence of thickened crust in the center of the Bushveld Complex and a region at the base of the crust where shear wave velocities exceed 4.0 km/s. The shear wave velocity models also suggest that velocities in some upper crustal layers may be as high as 3.7–3.8 km/s, consistent with the presence of mafic lithologies. These results favor a continuous-sheet model for the Bushveld Complex in which the outcropping mafic layers of the western and eastern limbs are continuous at depth beneath the center of the complex. However, detailed modeling of receiver functions at one station within the center of the complex indicates that the mafic layering may be locally disrupted due to thermal diapirism triggered by the emplacement of the Bushveld Complex or thermal and tectonic reactivation at a later time. DA - 2012-07 DB - ResearchSpace DP - CSIR KW - Bushveld Complex KW - Continuous-sheet model KW - Dipping-sheet model KW - Joint inversion KW - Receiver functions KW - Rayleigh wave group velocities LK - https://researchspace.csir.co.za PY - 2012 SM - 0040-1951 T1 - Shear wave velocity structure of the Bushveld Complex, South Africa TI - Shear wave velocity structure of the Bushveld Complex, South Africa UR - http://hdl.handle.net/10204/6348 ER -