Isotope constraints on the origin of Pan-African granitoid rocks in the Kaoko belt, NW Namibia

South African Journal of Geology

Volumn 105, Issue 2, 2002, Pages 179-192

  Seth, Barbara ^a   Jung, Stefan ^b   Hoernes, Stephan ^c  

^a UNIVERSITY OF WÜRZBURG   (Germany)

^b MAX PLANCK INSTITUTE FOR CHEMISTRY   (Germany)

^c UNIVERSITY OF BONN   (Germany)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0012458649     PISSN: 10120750     EISSN: 19968590     Source Type: Journal    
DOI: 10.2113/105.2.179     Document Type: Article

References (48)

1. Arndt, N.T. and Goldstein, S.L. (1987). Use and abuse of crust-formation ages. Geology, 15, 893-895.
2. Asprey, L.B. (1976). The preparation of very pure fluorine gas. Journal of Fluorine Chemistry, 7, 359-361.
3. Clayton, R.N. and Mayeda, T.D. (1963). The use of bromine pentafluoride in the extraction of oxygen from oxides and silicates for isotope analysis. Geochimica et Cosmochimica Acta, 27, 43-52.
4. Clemens, J.D. and Wall, V.J. (1981). Origin and crystallisation of some peraluminous (s-type) granitic magmas. Canadian Mineralogist, 19, 111-131.
5. Collins, W.J. (1996). Lachlan Fold Belts granitoids: products of three-component mixing. Transactions of the Royal Soiety of Edinburgh Earth Sciences, 87, 171-181.
6. Cox, K.G., Bell, J.D. and Pankhurst, R.J. (1979). The interpretation of igneous rocks. George, Allen and Unwin, London, 450pp.
7. DePaolo, D.J. and Wasserburg, G.J. (1976). Nd isotope variations and petrogenetic models. Geophysical Research Letters, 3, 249-252.
8. Dingeldey, D.P. (1997). Tectono-metamorphic evolution of the Pan-African Kaoko belt, NW-Namibia. PhD thesis, University of Würzburg, Germany, 247 pp.
9. Downing, K.N. and Coward, M.P. (1981). The Okahandja Lineament and its significance for Damaran tectonics in Namibia. Geologische Rundschau, 70, 972-1000.
10. Evensen, N.M., Hamilton, P.J. and O’Nions, R.K. (1978). Rare-earth abundances in chondritic meteorites. Geochimica et Cosmochimica Acta, 42, 1199-1212.
11. Faure, G. (1986). Principles of isotope geology. John Wiley and Sons, New York, U.S.A., 589 pp.
12. Flood, R.H. and Shaw, S.E. (1975). Cordierite-bearing granite suite from New England batholith, N.S.W., Australia. Contributions to Mineralogy and Petrology, 52, 157-164.
13. Franz, L., Romer, R.L. and Dingeldey, D.P. (1999). Diachronous Pan-African granulite-facies metamorphism (650 Ma and 550 Ma) in the Kaoko belt, NW Namibia. European Journal of Mineralogy, 11, 167-180.
14. Goldstein, S.L., O’Nions, R.K. and Hamilton, P.J. (1984). A Sm-Nd isotopic study of atmospheric dust and particulates from major river systems. Earth and Planetary Science Letters, 70, 221-236.
15. Guy, P. (1970). The Damara mobile belt in the south-western Kaokoveld, South West Africa. Bulletin of the Precambrian Research Unit, University of Cape Town, South Africa, 10, 168 pp.
16. Haack, U., Gohn, E. and Klein, J.A. (1980). Rb/Sr ages of granitic rocks along the middle reaches of the Omaruru River and the timing of orogenetic events in the Damara Belt (Namibia). Contributions to Mineralogy and Petrology, 74, 349-360.
17. 18O data. Contributions to Mineralogy and Petrology, 79, 279-289.
18. Harris, N.B.W. and Inger, S. (1992). Trace element modelling of pelite derived granites. Contributions to Mineralogy and Petrology, 110, 46-56.
19. Hawkesworth, C.J., Gledhill, A.R., Roddick, J.C., Miller, R.McG. and Kröner, A. (1983). Rb-Sr and 40Ar/39Ar studies bearing on models for the thermal evolution of the Damara belt, Namibia. Special Publication of the Geological Society of South Africa, 11, 323-338.
20. Hawkesworth, C.J. and Marlow, A.G. (1983). Isotope evolution of the Damara orogenic belt. Special Publication of the Geological Society of South Africa, 11, 397-407.
21. Hoffman, P.F., Hawkins, D.P., Isachsen, C.E. and Bowring, S.A. (1996). Precise U-Pb zircon ages for early Damaran magmatism in the Summas Mountains and Welwitschia Inlier, northern Damara belt, Namibia. Communications of the Geological Survey of Namibia, 11, 47-52.
22. Jung, S., Mezger, K. and Hoernes, S. (1998). Petrology and geochemistry of syn-to post-collisional metaluminous A-type granites-a major and trace element and Nd-Sr-Pb-O-isotope study from the Proterozoic Damara Belt, Namibia. Lithos, 45, 147-175.
23. Jung, S., Hoernes, S., Masberg, P. and Hoffer, E. (1999). The petrogenesis of some migmatites and granites (Central Damara Orogen, Namibia): Evidence for disequilibrium and crystal fractionation. Journal of Petrology, 40, 1241-1269.
24. Jung, S., Mezger, K. and Hoernes, S. (2001). Trace element and isotopic (Sr, Nd, Pb, O) arguments for a mid-crustal origin of Pan-African garnet-bearing S-type granites from the Damara orogen (Namibia). Precambrian Research, 110, 325-355.
25. Malvin, D.J. and Drake, M.J. (1987). Experimental determination of crystal/melt partitioning of Ga and Ge in the system forsterite-anorthite-diopsite. Geochimica et Cosmochimica Acta, 51, 2117-2128.
26. Martin, H. (1983). Overview of the geosynclinal, structural and metamorphic development of the intracontinental branch of the Damara Orogen. In: H. Martin and F. W. Eder (Editors). Intracontinental fold belts. Springer, Berlin, Germany, 473-502.
27. McDermott, F., Harris, N.B.W. and Hawkesworth, C.J. (1996). Geochemical constraints on crustal anatexis: a case study from the Pan-African granitoids of Namibia. Contributions to Mineralogy and Petrology, 123, 406-423.
28. Michard, A., Gurriet, P., Soudant, M. and Albarède, F. (1985). Nd isotopes in French Phanerozoic shales: external vs. internal aspects of crustal evolution. Geochimica et Cosmochimica Acta, 49, 601-610.
29. Milisenda, C.C, Liew, T.C., Hofmann, A.W. and Köhler, H. (1994). Nd isotopic mapping of the Sri Lanka basement: update, and additional constraints from Sr isotopes. Precambrian Research, 66, 95-110.
30. Miller, C.F. (1985). Are strongly peraluminous mamgas derived from pelitic sedimentary sources? Journal of Geology, 93, 673-689.
31. Miller, C.F. and Mittlefehlt, D.W. (1982). Depletion of light rare earth elements in felsic magmas. Geology, 10, 129-133.
32. Miller, R. McG. (1983). The Pan-African Damara orogen of South West Africa / Namibia. Special Publication of the Geological Society of South Africa, 11, 431-515.
33. Miller, R.McG. and Burger, A.J. (1983). U-Pb zircon ages of members of the Salem granitic suite along the northern edge of the Central Damara Belt. Special Publication of the Geological Society of South Africa, 11, 273-280.
34. Miller, R.McG. and Grote, W. (1988). Geological map of the Damara Orogen South West Africa / Namibia 1:500000. Geol. Surv. Namibia, Windhoek.
35. Mittlefehldt, D.W. and Miller, C.F. (1983). Geochemistry of the Seawater Wash pluton, California: implications for ‘anomalous’ trace element behaviour during differentiation of felsic magmas. Geochimica et Cosmochimica Acta, 47, 109-124.
36. Passchier, C.W. and Trouw, R.A.J. (1996). Microtectonics. Springer, Berlin. Germany, 289 pp.
37. Patiño Douce, A.E. (1997). Generation of metaluminous A-type granites by low-pressure melting of calc-alkaline granitoids. Geology, 25, 743-746.
38. Phillips, G.N., Wall, V.J. and Clemens, J.D. (1981). Petrology of the Strathbogie batholith-a cordierite bearing granite. Canadian Mineralogist, 19, 47-63.
39. Seth, B. (1999). Crustal evolution of the Kaoko belt, NW Namibia. Geochemical and geochronological study of Archaean to Mesoproterozoic basement gneisses and Pan-African migmatites and granitoids. PhD thesis, University of Würzburg, Germany, 120 pp.
40. Seth, B., Kröner, A., Mezger, K., Nemchin, A.A., Pidgeon, R.T. and Okrusch, M. (1998). Archean and Neoproterozoic magmatic events in the Kaoko belt of NW Namibia and their geodynamic significance. Precambrian Research, 92, 341-363.
41. Steiger, R.H. and Jäger, E. (1977). Subcommission on geochronology: Convention on the use of decay constants in geo-and cosmochronology. Earth and Planetary Science Letters, 36, 359-362.
42. Steven, N.M., Armstrong, R.A. and Moore, J.M. (1992/93). New Rb-Sr data from the Central Zone of the Damara Orogen, Namibia. Communications of the Geological Survey of Namibia, 8, 5-14.
43. Thompson, R.N. (1982). British Tertiary volcanic province. Scottish Journal of Geology, 18, 49-107.
44. Whalen, J.B., Currie, K.L. and Chappell, B.W. (1987). A-type granites: geochemical characteristics, discrimination and petrogenesis. Contributions to Mineralogy and Petrology, 95, 407-419.
45. White, A.J.R. and Chappell, B.W. (1977). Ultrametamorphism and granite genesis. Tectonophysics, 43, 7-22.
46. Williamson, B.J., Downes, H., Thirlwall, M.F. and Beard, A. (1997). Geochemical constraints on restite composition and unmixing in the Velay anatectic granite, French Massif Central. Lithos, 40, 295-319.
47. Wilson, M. (1989). Igneous petrogenesis. Unwin Hyman, London, 466pp.
48. Zuleger, E. and Erzinger, J. (1988). Determination of the REE and Y in silicate materials with ICP-AES. Fresenius Zeitschrift für Analytische Chemie, 332, 140-143.