Abstract
The lower continental crust is a key region to understanding processes of crust–mantle differentiation and subsequent evolution of the crust. The region is metamorphosed into granulite or amphibolite facies1,2. Whereas felsic to mafic granulites with an average intermediate major element composition are typically observed in old exposed lower crustal terranes, mafic compositions are preponderant among granulite facies xenoliths transported by young alkalic basaltic volcanics and kimberlites1. Radiometrie ages for granulite bulk rocks using the Rb–Sr or U–Pb methods are usually interpreted as metamorphic ages. In contrast, Sm–Nd ages obtained on such metamorphics are interpreted to reflect pre-metamorphic events3–7, although a case of severe disturbance of the Sm–Nd isotope system during granulite facies metamorphism has also been reported8. We present here Sm–Nd and Rb–Sr isotope data for a suite of mafic lower crustal xenoliths from the Hercynian belt. Our data suggest that the igneous precursors of these granulites differentiated from depleted mantle ∼1.5 Gyr ago. In most of these granulites this evidence for a mid-Proterozoic age has been obliterated by a young (≺172 Myr) metasomatic overprint by mantle derived fluids or melts.
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References
Kay, R. W. & Kay, S. M. Rev. Geophys. Space Phys. 19, 271–297 (1981).
Fountain, D. M. & Salisbury, M. H. Earth planet. Sci. Lett. 56, 263–277 (1981).
Hamilton, P. J., Evensen, N. M., O'Nions, R. K. & Tarney, J. Nature 277, 25–28 (1979).
Jacobsen, S. B. & Wasserburg, G. W. Earth planet. Sci. Lett. 41, 245–253 (1978).
Rogers, N. W. & Hawkesworth, C. J. Nature 299, 409–413 (1982).
Cliff, R. A., Gray, C. M. & Huhma, H. Contr. Miner. Petrol. 82, 91–98 (1983).
McCulloch, M. T., Arculus, R. J., Chappell, B. W. & Ferguson, J. Nature 300, 166–169 (1982).
DePaolo, D. J., Manton, W. I., Grew, E. S. & Halpern, M. Nature 298, 614–618 (1982).
Okrusch, M., Schröder, B. & Schnütgen, A. Lithos 12, 251–270 (1979).
Voll, G. in Plateau Uplift, The Rhenish Shield—A Case History (eds Fuchs, K. et al.) 336–342 (Springer, Berlin, 1983).
Mechie, J., Prodehl, C. & Fuchs, K. in Plateau Uplift, The Rhenish Shield—A Case History (eds Fuchs, K. et al.) 260–275 (Springer, Berlin, 1983).
Stosch, H.-G. & Seck, H. A. Geochim. Cosmochim. Acta 44, 457–470 (1980).
Stosch, H.-G., Carlson, R. W. & Lugmair, G. W. Earth planet. Sci. Lett. 47, 263–271 (1980).
Heier, K. Phil. Trans. R. Soc. A273, 429–442 (1973).
Weaver, B. & Tarney, J. Earth planet. Sci. Lett. 51, 279–296 (1980).
Newton, R. C., Smith, J. V. & Windley, B. F. Nature 288, 45–50 (1980).
Jäger, E. Coll. Int. CNRS, Rennes 243, 227–239 (1974).
Vidal, P., Auvray, B., Charlot, R. & Cogné, J. Precamb. Res. 14, 1–20 (1981).
Gebauer, D. & Grünenfelder, M. 5th Int. Isotope Geology Conf., Nikko, Japan, 111–112 (1982).
Taylor, S. R., McLennan, S. M. & McCulloch, M. T. Geochim. cosmochim. Acta 47, 1897–1905 (1983).
Miller, R. G. & O'Nions, R. K. EOS 64, 906 (1983).
Windley, B. F. The Evolving Continents (Wiley, London, 1977).
DePaolo, D. J. Nature 291, 193–196 (1981).
Patchett, J., Arndt, N. T., Chauvel, C. & Todt, W. Terra Cognita 4, 94 (1984).
Bailey, D. K. Nature 296, 525–530 (1982).
Bell, K. Nature 291, 189–190 (1981).
McCulloch, M. T. & Wasserburg, G. J. Science 200, 1003–1011 (1978).
O'Nions, R. K., Hamilton, P. J. & Hooker, P. J. Earth planet. Sci. Lett. 63, 229–240 (1983).
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Stosch, HG., Lugmair, G. Evolution of the lower continental crust: granulite facies xenoliths from the Eifel, West Germany. Nature 311, 368–370 (1984). https://doi.org/10.1038/311368a0
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DOI: https://doi.org/10.1038/311368a0
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