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      The Vredefort Structure.

                  Misconceptions and Facts - Dr. Joe Mayer

                                                                                                                      

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About the Author

 

The author was born on 10th of December, 1935, on the farm Lindequesfontein 73 (Orange Free State) on the southwestern part of the Vredefort Dome.  He is not a converted impactist but has been an ardent supporter of the impact theory since starting field work in the area. As co-author of the latest geological map of the Vredefort Dome (responsible for mapping the Central Rand Group)  the author has, since 1988,  done extensive fieldwork  in the area of the Vredefort Structure.

Career:

 As   mine and field geologist:   Cape Asbestos S.A. Ltd.  1958 -1963.

 As Lecturer geology:  Potchefstroom University for C.H.E 1964-1995.

 

Publications on the Vredefort Structure:

 

Mayer J.J. and Albat, H.M. (1989) The tectono-sedimentary setting of the area of the Vredefort Structure during the deposition of the upper quartzite member of the Hospital Hill Subgroup. S.Afr. J Geol., 91, 239-247.

 

 Albat, H.M. and Mayer, J.J. (1989). Megascopic planar shock fractures in the Vredefort Structure: a potential time marker? Tectonophysics, 162, 265-­276.

 

H.M. Albat and J.J. Mayer (1990) Shatter cones in Vredefort Rocks – imagination or reality? S.Afr.J.Geol. 93(3), 547-548.

 

Mayer, J.J. and Albat H.M.(1990) An appraisal of the significance of small-scale fold structures  in the contorted bed of the area of the Vredefort Structure. S.Afr.J.Geol., 93, 311-317.

 

Mayer, J.J. (1992). Aspects of the sedimentological, structural and stratigraphic investigations of the collar strata of the Vredefort Structure: Contributions towards an understanding of the pre-history and origin of the Structure. Ph.D. thesis (unpubl.)

Potchefstroom University for C.H.E., 284 pp.  

 

Mayer, J.J. and Els B.G. (1992). The reconstruction of palaeocurrent dispersal patterns for Turffontein strata in the Vredefort Structure in relation to a tectonic model for the area. S.Afr.J.Geol., 95, 40-50.

 

B.G. Els and J.J. Mayer, (1992). Transgressive and progradational beach and nearshore facies in the late Archaean Turffontein Subgroup of the Witwatersrand Supergroup, Vredefort area,

South Africa. S.Afr.J.Geol., 95 (1/2), 60-73.

 

Els, B.G., and Mayer, J.J. (1993) Authors' reply on discussion by P.G. Eriksson et al. of: Els, E.G., and Mayer, J.J. (1992). Transgressive and progradational beach and nearshore facies in the Late Archaean Turffontein Subgroup of the Witwatersrand Supergroup,

Vredefort Area, South Africa. S. Afr. J. Geol, 96 (1).

 

Mayer J.J., (1994).  A tectonic model for the Vredefort Structure, Geobulletin, 37(1/2), 6-10.

 

Mayer J.J. (1994) Reply to comments by Reimold and in their ‘Cover Story’ ‘About the impact origin of Vredefort ‘on the article “A tectonic model for the Vredefort Structure’.Geobulletin, 37(4), 27-30.

 

Mayer, J.J., Bate M.D., and F.E. Marx (1994). The discovery of a shatter cone at the Rietfontein Complex and new data on the extent of the mafic portion of the complex. S.Afr.J.Geol., 97(2), 225-227.

 

Mayer J.J. (1997).  Discussion on Reimold & Minnitt (1996) ‘Impact-induced shatter cones or percussion marks on quartzite of Witwatersrand and

Transvaal Supergroups?’ S.Afr.J.Geol,100(2), 181-184.

  

B.G. Els and J.J. Mayer (1998). Coarse clastic tidal and fluvial sedimentation during a large late Archaean sea-level rise: the Turfontein Subgroup in the Vredefort Structure South

Africa,  Tidalites Processes and Products, SEPM (Society for Sedimentary Geology), ISBN., 154-165.

  

Mayer J.J. (1999).  The Geological Map of the Vredefort Dome, responsible for the mapping of the Central Rand Group. Contribution on the Central Rand Group and the sedimentology of the Witwatersrand Supergroup in “Explanation of Geological sheets 2627CA, CB, CC, CD, DA. DC and 2727AA, AB, BA (1:50 000)”. Council for Geoscience, Geological Survey of

South Africa, ISBN 1-875061-60-6.

 

 

 

 

Other publications

  

       MAYER, JJ., (1973) .  Morphotectonic Development of the Harts River Valley in relation to the Griqualand-Transvaal Axis and the Vaal and Molopo Rivers. Trans.geol.Soc. S.Africa,  76,183-194

   

      MAYER, J.J., (1985).  Interpretation of heavy-mineral patterns in the sandy soils of the region drained by the upper reaches of the

Harts River. Trans.geol.Soc.S.Afr., 88,  27 -32.

 

MAYER, J.J., (1986) Differential erosion of suggested Kalahari Aeolian Deposits along  the Vaal-Orange Drainage Basin and the upper reaches of the

Harts River. Trans.geol.Soc.S.Afr.,  89, 401-407.

 

Henning, L.T.. Els, B.G. and  J.J. Mayer (1994).  The Ventersdorp Contact  placer at Western deep Levels Gold Mine: an ancient terraced fluvial system. S.Afr.J.Geol., 97(3) , 38-318,

  

Els, B.G., van den Berg, W.A., and J.J.Mayer (1995).  The Black Reef quartzite formation in the western Transvaal: sedimentological and economic aspects, and significance for basin evolution. Mineral Deposits, 30, 112-123.

  

Hall, R.C.B., B.G. Els and  J.J. Mayer (1997)  The Ventersdorp Contact Reef: Final phase of the Witwatersrand Basin , independent formation or precursor to the Ventersdorp Supergroup. S.Afr.J..Geol., 100(3), 213-222.

 

R.C.B. Hall,  B.G. Els and J.J. Mayer (1999)  Author’s Reply to  discussion:

 Discussion on ‘ The Ventersdorp Contact Reef: Final phase of the Witwatersrand Basin, independent formation, or precursor to the Ventersdorp Supergroup?’ (S.Afr.J.Geol., 100, 213-222 )  H. de la R. Winter. S.Afr.J.Geol., 102,89-92.



19 June 2007

 

 

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