Hostname: page-component-78c5997874-v9fdk Total loading time: 0 Render date: 2024-11-10T07:28:50.941Z Has data issue: false hasContentIssue false
  • English
  • Français

Transmission electron microscopy of pyrometamorphic breakdown of phengite and chlorite

Published online by Cambridge University Press:  05 July 2018

R. H. Worden ,
P. E. Champness  and
G. T. R. Droop
R. H. Worden
Affiliation:
Department of Geology, University of Manchester, Oxford Road, Manchester, M13 9PL
P. E. Champness
Affiliation:
Department of Geology, University of Manchester, Oxford Road, Manchester, M13 9PL
G. T. R. Droop
Affiliation:
Department of Geology, University of Manchester, Oxford Road, Manchester, M13 9PL
Get access Rights & Permissions [Opens in a new window]

Abstract

Phengite and chlorite have undergone decomposition during pyrometamorphism caused by the intrusion of a dolerite feeder pipe into Dalradian greenschists in Argyllshire, Scotland. All reaction products are extremely fine grained. Transmission electron microscopy has revealed that phengite pseudomorphs consist of biotite, spinel, mullite, sanidine and phengite, and that chlorite pseudomorphs consist of combinations of chlorite, spinel, orthopyroxene, magnetite, cordierite and biotite. Although the reactions were short-lived and did not go to completion, microprobe analysis and phase diagram analysis have revealed that there has been significant chemical interaction between the phyllosilicates and the surrounding rock. Numerous orientation relationships exist between the original minerals and their reaction products; the close-packed planes in the precursor phyllosilicates were inherited by their reaction products.

Keywords

reaction mechanismelectron microscopypyrometamorphismphengitechlorite
Type
Electron Microscopy in Mineralogy and Petrology
Information
Mineralogical Magazine , Volume 51 , Issue 359 , March 1987 , pp. 107 - 121
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1987

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Barber, D.J. (1970) J. Mater. Sci., 5, 1-8.CrossRefGoogle Scholar
Brearley, A.J. (1984). Unpubl. Ph.D. thesis, University of Manchester.Google Scholar
Brearley, A.J. (1986) Mineral. Mag., 50, 385-97.Google Scholar
Brearley, A.J. and Champness, P.E. (1986) Ibid. 50, 621-33.Google Scholar
Cameron, W.E. (1977) Am. Mineral., 62, 747-55.Google Scholar
Carmichael, D.M. (1969) Contrib. Mineral Petrol., 20, 244-67.CrossRefGoogle Scholar
Chadwick, G.A. (1972) Metallography of phase transformations. Butterworths, London.Google Scholar
Chatterjee, N.D. and Johannes, W. (1974) Contrib. Mineral. Petrol., 48, 89-114.CrossRefGoogle Scholar
Chinner, G.A. (1962) J. Petrol., 2, 312-23.CrossRefGoogle Scholar
Cliff, G. and Lorimer, G.W. (1975) J. Microsc., 103, 203-7.CrossRefGoogle Scholar
Evans, B.W. (1965) Am. J. Sci., 263, 647-67.CrossRefGoogle Scholar
Fawcett, J.J. and Yoder, H.S. (1966) Am. Mineral., 51, 353-80.Google Scholar
Ferguson, C.C. and AI-Ameen, S.I. (1985) Mineral. Mag., 49, 505-14.CrossRefGoogle Scholar
Foster, C.T. R. (1977) Am. Mineral., 62, 727-46.Google Scholar
Fujii, T. (1976) Carnegie Inst. Washington Ann. Report Div. Geophys. Lab., 1975-1976, 566-71.Google Scholar
Greenwood, H.J. (1975) Am. Mineral., 60, 1-8.Google Scholar
Guidotti, C.V. (1973) Contrib. Mineral. Petrol., 42, 33-40.CrossRefGoogle Scholar
Hariya, Y., Dollase, W.A. and Kennedy, G.C. (1969) Am. Mineral., 54, 1419-40.Google Scholar
Hey, M.M. (1954) Mineral Mag., 30, 277-92.Google Scholar
Hill, J.E. et al. (1905) “the geology of mid-ArgyU. Mem. Geol. Surv. Scotland.Google Scholar
Hobbs, L. (1983) Proc. 41st Ann. Meeting E.M.S.A., 346-349.Google Scholar
James, R.S., Turnock, A.C. and Fawcett, J.J. (1975) Contrib. Mineral. Petrol., 56, 1-25.Google Scholar
Kwak, T.A. P. (1968) Geoehim. Cosmoehim. Acta,, 32, 1222-9.Google Scholar
Martin, R.F. (1972) In The Feldspars (MacKenzie, W.S. and Zussman, J., eds.). Proceedings of a NATO Advanced Study Institute.Google Scholar
McGill, R.J., and Hubbard, F.H. (1981) In Qualitative microanalysis with high spatial resolution (Lorimer, G.W., Jacob, M.H. and Doig, P., eds.) The Metals Society.Google Scholar
McOnie, A.W., Fawcett, J.J. and James, R.S. (1975) Am. Mineral., 60, 1047-62.Google Scholar
Miyashiro, A. (1973) Metamorphism and metamorphic belts. George Allen and Unwin.CrossRefGoogle Scholar
Porter, D.A. and Easterling, K.E. (1981) Phase transformations in metals and alloys. Van Nostrand Reinhold (U.K.) Co. Ltd.Google Scholar
Schreyer, W. (1976) In The evolution of the crystalline rocks (Bailey, D.K. and Macdonald, R. eds), London and New York Academic Press.Google Scholar
Smith, D.G. W. (1965) Am. Mineral. 50, 19822022.Google Scholar
Smith, D.G. W. (1969) J. Petrol., 10, 20-55.Google Scholar
Spry, A. (1969) Metamorphic textures, Pergamon Press.Google Scholar
Sundius, N. and Bystrom, A.M. (1953) Trans. Brit. Ceramn. Soc., 52, 632-42.Google Scholar
Thompson, J.B. (1957) Am. Mineral., 42, 842-58.Google Scholar
Tighe, N.J. (1976) In Electron microscopy in mineralogy. (Wenk, H.R., ed.). Berlin, Springer-Verlag.Google Scholar
Turnock, A.C. and Eugster, H.P. (1962) J. Petrol., 3, 533-65.CrossRefGoogle Scholar
Wirth, R. (1985) Neues. Jahrb. Mineral. Abh. 152, 101-12.Google Scholar
Yoder, H.S. and Eugster, H.P. (1955) Geochim. Cosmochim. Acta, 6, 225-80.Google Scholar