Abstract
THE progressive desilication of pelitic sediments during contact metamorphism has been known for some time1,2. A mineral assemblage relatively enriched in aluminium and impoverished in silicon is progressively developed with the production of such phases as spinel, corundum, enstatite, cordierite and andalusite. The initial silica content of an argillaceous sediment before metamorphism may be between 60 and 70 per cent and on contact metamorphism desilication may lower the silica value to about 45–55 per cent—a range found in some pelitic xenoliths enclosed in granite.
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References
Tilley, C. E., Quart. J. Geol. Soc. Lond., 80, 22 (1924).
Tilley, C. E., Geol. Mag., 62, 363 (1925).
Hawkes, J., Ph.D. thesis, Birmingham Univ. (1961).
Floyd, P., Ph.D. thesis, Birmingham Univ. (1962).
Tilley, C. E., Miner. Mag., 24, 181 (1935).
Hawkes, J., Abs. Proc., Second Conf. Geologists working in S.W. England; Exeter (1958).
Lacy, E. D., Abs. Proc., Second Conf. Geologists working in S.W. England; Exeter (1958).
Floyd, P., J. Ussher Soc., 1, 7 (1962).
Tilley, C. E., and Flett, J. S., Summ. Prog. Geol. Surv. G.B., Pt. 2 (1929).
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FLOYD, P. Progressive Desilication of Basic Hornfelses. Nature 203, 510–511 (1964). https://doi.org/10.1038/203510a0
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DOI: https://doi.org/10.1038/203510a0
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