The structural development of the Aggeneys Hills, Namaqua metamorphic complex

South African Journal of Geology

Volumn 105, Issue 4, 2002, Pages 301-324

  Colliston, W P ^a   Schoch, A E ^a  

^a UNIVERSITY OF THE FREE STATE   (South Africa)

Author keywords

[No Author keywords available]

Indexed keywords

FOLDING; METAMORPHISM; NAPPE; PROTEROZOIC; STRUCTURAL GEOLOGY; TECTONIC EVOLUTION; TECTONOSTRATIGRAPHY;

NAMAQUA BELT; NAMIBIA; SOUTH AFRICA;

EID: 0036991567     PISSN: 10120750     EISSN: None     Source Type: Journal    
DOI: 10.2113/1050301     Document Type: Article

References (38)

1. Berthé, O., Choukroune, P. and Jegouzo, P. (1979). Orthogneiss, mylonite and non coaxial deformation of granites: the example of the south Armorican shear zone. Journal of Structural Geology, 2, 31-42.
2. Blignault, H.J., Van Aswegen, G., Van der Merwe, S.W. and Colliston, W.P. (1983). The Namaqualand Geotraverse and environs: part of the Proterozoic Namaqua mobile belt. In: Botha, B.J.V. (Ed.). Namaqualand Metamorphic Complex. Special Publication of the Geological Society of South Africa, 10. 1-29.
3. Boyer, S.E. and Elliott, O. (1982). Thrust systems. American Association of Petroleum Geologists Bulletin, 66, 1196-1230.
4. Carreras, J., Estrada, A. and White, S. (1977). The effects of folding on the e-axis fabrics of a quartz mylonite. Tectonophysics, 39, 3-24.
5. Cobbold, P.R. and Quinquis, H. (1980). Development of sheath folds in shear regimes. Journal of Structural Geology, 2, 119-126.
6. Colliston, W.P. (1990). A stratigraphic and structural investigation of part of the Namaqua mobile belt between Dabenoris and Steyerkrall, South Africa. Unpublished PbD thesis. University of the Orange Free State, Bloemfontein. South Africa, 260pp.
7. Colliston, W.P. (Editor). Praekelt, H.E. Strydom, D. Pretorius, J.J. and Schoch, A.E. (Coordinator) (1986). Stratigraphic map of Central Bushmanland (1: 100 000 geological map). Department of Geology, University of the Orange Free State, Bloenfontein. South Africa, (One sheet).
8. Colliston, W.P., Prackelt, H.E. and Schoch, A.E. (1989a). A broad perspective (Haramoep) of geological relations established by sequence mapping in the Proterozoic Aggeneys terrane, Bushmanland. South Africa. South African Journal of Geology, 92, 42-48.
9. Colliston, W.P., Praekelt, H.E. and Schoch, A.E. (1989b). Reply to discussions by J.H.W. Ward and by P. Smith on " A broad perspective (Haramoep) of geological relations established by sequence mapping...." South African Journal of Geology. 92, 456-460 and 460-466.
10. Colliston, W.P., Praekelt, H.E. and Schoch, A.E. (1991). A prgressive ductile shear model for the Proterozoic Aggeneys terrane. Namaqua mobile belt, South Africa. Precambrian Research, 49, 205-215.
11. Colliston, W.P. and Schoch, A.E. (1998). Tectonostratigraphic features along the Orange River in the western part of the Mesoproterozoic Namaqua mobile belt. South African Journal of Geology. 101, 91-100.
12. Colliston, W.P. and Schoch, A.E. (2000). Mid-Proterozoic tectonic evolution along the Orange River on the border between South Africa and Namibia. Communications of the Geolopgical Survey of Namibia (Henno Martin Volume), 12, 53-62.
13. Escher, A. and Watterson, J. (1974): Stretching fabrics, folds and crustal shortening. Tectonophysics, 22, 223-231.
14. Hartnady, C.J.H., Joubert, P. and Stowe, C. W. (1985). Proterozoic crustal evolution in southwestern Africa. Episodes, 8, 236-244.
15. Joubert, P. (1986). Namaqualand - a model of Proterozoic accretion. Transactions of the Geological Society of South Africa, 89, 79-96.
16. Lipson, R.D. (1978). Some aspects of the geology of part of the Aggeneysberge and the surrounding gneisses, Naniaqualand. Unpublished. M.Sc. thesis, University of the Witwatersrand, Jobannesburg. South Africa, 100 pp.
17. Minnigh, L.O. (1979). Structural analysis of sheath-folds in a meta-chert from the western Italian Alps. Journal of Structural Geology, 1, 275-282.
18. Platt, J.P. (1984). Secondary cleavages in ductile shear zones. Journal of Structural Geology, 6, 439-442.
19. Praekelt, H.E. (1994). Die metasedimentere gesteentes van die Aggeneys terrein in die Haramoep omgewing. Unpublished Ph.D. thesis, University of the Orange Free State, Bleomfontein, South Africa, 126pp.
20. Praekelt, H.E., Botha, B.J.V. and Matherbe, S.J. (1986). Diskrete korsfragmente in die sentrale gedeelte van die Namakwagordel in die omgewing van Augrabies. Annals of the Geological Survey of South Africa, 20, 25-40.
21. Praekelt, H.E. and Schoch, A.E. (1997). Stratigraphic synthesis of the metasediments of the Aggeneys terrane in the Namaqua Mobile Belt. South African Journal of Geology, 100, 85-100.
22. Praekelt, H.E., Strydom, D., Colliston, W.P. and Schoch, A.E. (1992). Litostratigrafic van die Hotson Formasie (Boesmanland Groep). In: M. R. Johnson (Editor), Catalogue of South African Lithostratigraphic Units, South African Committee for Stratigraphy Lithostratigraphic Series, Council for Geoscience, South Africa, 18, 7pp.
23. Quinquis, H., Audren, C., Brun, J.P. and Cobbold, P.R. (1978). Intense progressive shear in lie de Gruix blueschists and compatibility with subduction or obduction. Nature, 273, 43-45.
24. Ramsay, J.G. (1967). Folding and fracturing of rocks. McGraw-Hill, New York, 568 pp.
25. Ramsay, J.G. (1980). Shear zone geometry: a review. Journal of Structural Geology, 2, 83-99.
26. Rhodes, S. and Gayer, R.A. (1977). Non cylindrical folds, linear structures in the X direction and mylonite developed during translation of the Caledonian Kolak Nappe Complex of Finnmark. Geological Magazine, 114, 329-408.
27. Rozendaal, A. (1978). The Gamsberg zinc deposit. In: Verwoerd, W.J. (Ed.). Mineralization of Metamorphic Terranes. Special Publication of the Geological Society of South Africa. 4, 235-265.
28. Simpson, C. and Schmid, S.M. (1983). An evaluation of criteria to deduce the sense of movement in sheared rocks. Geological Society of America Bulletin, 94, 1281-1288.
29. Stowe, C.W. (1983). The Upington Geotraverse and its implications for craton-margin tectonics. Special Publication of the Geological Society of South Africa, 10, 147-171.
30. Strydom, D., Colliston, W.P., Praekelt, H.E., Schoch, A.E., Van Aswegen, G., Pretorius, J.J., Beukes, G.J., Cilliers, B., Watkeys, M. and Botes, F.J. (1987). The tectonic units of parts of Namaqualand, Bushmanland and southern South West Africa/ Namibia (1:250 000 geological map). Department of Geology, University of the Orange Free State, Bloemfontein. South Africa, (One sheet printed on both sides).
31. Strydom, D. and Visser, J.N.J. (1986). Nappe structures in the highly deformed Proterozoic metasedimentary Aggeneys-type sequence of western Bushmanland, South Africa. Precambrian Research., 33, 171-187.
32. Thomas, R.J., Cornell, D.H., Moore, J.M. and Jacobs, J. (1994). Crustal evolution of the Namaqua-Natal etamorphic Province. South African Journal of Geology, 97, 8-14.
33. Van Aswegen, Strydom, D., Colliston, W.P., Praekelt, H.E., Blignault, H.J., Schoch, A.E., Botha, B.J.V. and van der Merwe, S.W. (1987). The structural-stratigraphic development of part of the Namaqua Metamorphic Complex - an example of Proterozoic major thrust tectonics. In: A. Kröner (Editor). Proterozoic Lithosphere Evolution, American Geophysical Union Geodynamics Series., 17, 207-216.
34. Van der Merwe, S.W. (1995). The relationship between thrusting, vertical shears and open folds in the western part of the Namaqua mobile belt, South Africa. South African Journal of Geology, 98, 68-77.
35. Van der Merwe, S.W. and Botha, B.J.V. (1989). The Groothoek Thrust Belt in Western Namaqualand: an example of mid-crustal structure. South African Journal of Geology; 92, 156-166.
36. Van Zyl, V.C. (1986). Metamorphic studies in the Proterozoic rocks of part of northern Bushmanland. Unpublished MSc thesis, University of the Orange Free State, Bloenfotein, South Africa, 401pp.
37. Visser, D.J.L. (1998). The geotectonic evolution of South Africa and offshore areas, Expl. Structure Map of South Africa (1:1 000 000). Council for Geoscience, Pretoria. 319pp.
38. Williams, G.D. (1978). Rotations of contemporary folds into the X direction during overthrust processes in Laksefjord, Finnmark. Tectonophysics. 48, 29-40.