Hostname: page-component-cd9895bd7-p9bg8 Total loading time: 0 Render date: 2024-12-27T07:29:36.340Z Has data issue: false hasContentIssue false
  • English
  • Français

Equilibration conditions of upper-mantle eclogites: implications for kyanite-bearing and diamondiferous varieties

Published online by Cambridge University Press:  05 July 2018

D. A. Carswell ,
J. B. Dawson  and
F. G. F. Gibb
D. A. Carswell
Affiliation:
Department of Geology, University of Sheffield, Mappin Street, Sheffield S1 3JD, UK
J. B. Dawson
Affiliation:
Department of Geology, University of Sheffield, Mappin Street, Sheffield S1 3JD, UK
F. G. F. Gibb
Affiliation:
Department of Geology, University of Sheffield, Mappin Street, Sheffield S1 3JD, UK
Get access Rights & Permissions [Opens in a new window]

Abstract

New mineral data for kyanite-bearing eclogites supplement existing data for eclogite nodule suites from the Roberts Victor and Bellsbank kimberlite intrusions, South Africa. Calculation of equilibration temperatures using the refined KD calibration of Ellis and Green (1979) indicates that the majority of these eclogites equilibrated over a considerably narrower range (940–1185 °C) than implied by earlier estimates which did not take account of the influence of the Ca-component of garnet on KD. Most of the Roberts Victor diamondiferous eclogites appear to have equilibrated in the lower part of this range, whilst the equilibration temperatures for the Roberts Victor diamond-free eclogites extend to higher values than those from Bellsbank. The petrogenetic implications of the (calculated) temperature and pressure equilibration conditions for these eclogite suites are discussed with particular reference to possible uppermantle geotherms and available data on the graphitediamond transition boundary.

Type
Research Article
Information
Mineralogical Magazine , Volume 44 , Issue 333 , March 1981 , pp. 79 - 89
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1981

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

Banno, S. (1970). Phys. Earth Planet. Inter. 3, 405-21.CrossRefGoogle Scholar
Berman, R. (1979). In Field (J. E.) (ed.). The properties of diamond, Academic Press, London, 1-22.Google Scholar
Bishop, F.C., Smith, J.V., and Dawson, J.B. (1978). Lithos, 11, 155-73.CrossRefGoogle Scholar
Boyd, F.R. (1973). Geochim. Cosmochim. Acta, 37, 2533-46.CrossRefGoogle Scholar
Boyd, F.R. (1974). Carnegie Inst. Wash. Yearb. 73, 285-94.Google Scholar
Boyd, F.R. and Nixon, P.H. (1978). Geochim. Cosmochim. Acta, 42, 1367-82.CrossRefGoogle Scholar
Bundy, F.P., Bovenkerk, H.P., Strong, H.M., and Wentorf, R.H., Jr. (1961). J. Chem. Phys. 35, 383-91.CrossRefGoogle Scholar
Burns, R.G., Huggins, F., and Drickamer, H.G. (1972). Proc. 24th Int. Geol. Cong. Scot. 14, 113-23.Google Scholar
Carswell, D.A. (1980). Lithos, 13, 121-38.CrossRefGoogle Scholar
Carswell, D.A. and Gibb, F.G.F. (1980). Contrib. Mineral. Petrol. 74, 403-16.CrossRefGoogle Scholar
Clark, S.P., Jr., and Ringwood, A.E. (1964). Rev. Geophys. 2, 35-88.CrossRefGoogle Scholar
Dawson, J.B. (1968). Econ. Geol. 63, 504-11.CrossRefGoogle Scholar
Dawson, J.B. (1980). In Kimberlites and their xenoliths, Springer Verlag, Heidelberg.CrossRefGoogle Scholar
Ellis, D.J., and Green, D.H. (1979). Contrib. Mineral. Petrol. 71, 13-22.CrossRefGoogle Scholar
Griffin, W.L., CarsweU, D.A., and Nixon, P.H. (1979). Proc. Second Intern. Kimberlite Conf. 2, 59-86.Google Scholar
Gurney, J.J., Mathias, M., Siebert, C., and Moseley, G. (1971). Contrib. Mineral. Petrol. 30, 46-52.CrossRefGoogle Scholar
Harte, B., and Gurney, J.J. 1975). Phys. Chem. Earth, 9, 367-87.CrossRefGoogle Scholar
Hatton, C.J., and Gurney, J.J. (1979). Proc. Second Intern. Kimberlite Conf. 2, 29-36.Google Scholar
Kennedy, S.C., and Kennedy, G.C. (1976). J. Geophys. Res. 81, 2467-70.CrossRefGoogle Scholar
Kushiro, I. (1969). Mineral. Soc. Am. Spec. Pap. 2, 179-91.Google Scholar
Kushiro, I. and Aoki, K.-I. (1968). Am. Mineral. 53, 1347-67.Google Scholar
Lappin, M.A. (1978). Contrib. Mineral. Petrol. 66, 229-41.CrossRefGoogle Scholar
Lappin, M.A. and Dawson, J.B. (1975). Phys. Chem. Earth, 9, 351-65.CrossRefGoogle Scholar
MacGregor, I.A., and Carter, J.L. (1970). Phys. Earth Planet. Inter. 3, 391-7.CrossRefGoogle Scholar
Mathias, M., Siebert, J.C., and Rickwood, P.C. (1970). Contrib. Mineral. Petrol. 26, 75-123.CrossRefGoogle Scholar
Neumann, E.R. (1976). Norsk Geol. Tidsskr. 56, 1-6.Google Scholar
Nixon, P.H., yon Knorring, O., and Rooke, J.M. (1963). Am. Mineral. 48, 1090-132.Google Scholar
O'Hara, M.J., and Mercy, E.L.P. (1966). Nature, 212, 68-9.CrossRefGoogle Scholar
O'Hara, M.J. and Yoder, H.S., Jr. (1967). Scott. J. Geol. 3, 67-117.Google Scholar
O'Hara, M.J., Saunders, M.J., and Mercy, E.L.P. (1975). Phys. Chem. Earth, 9, 571-604.CrossRefGoogle Scholar
Ratheim, A., and Green, D.H. (1974). Contrib. Mineral. Petrol. 48, 179-203.CrossRefGoogle Scholar
Ratheim, A., and Green, D.H. (1975). Lithos, 8, 317-28.CrossRefGoogle Scholar
Reid, A.M., Brown, R.W., Dawson, J.B., Whitfield, G.G., and Siebert, J.C. (1976). Contrib. Mineral. Petrol. 58, 203-20.CrossRefGoogle Scholar
Rickwood, P.C. (1969). Geol. Soc. S. Africa Spec. Pap. 2, 397-416.Google Scholar
Rickwood, P.C. and Mathias, M. (1970). Lithos, 3, 223-35.CrossRefGoogle Scholar
Rickwood, P.C., Gurney, J.J., and White-Cooper, D.R. (1969). Geol. Soc. S. Africa Spec. Pap. 2, 371-93.Google Scholar
Shee, S.R., and Gurney, J.J. (1979). Proc. Second Intern. Kimberlite Conf. 2, 37-49.Google Scholar
Sobolev, N.V. (1977). In Deep-seated inclusions in kimberlites and the problem of the composition of the upper mantle, Am. Geophys. Union, Washington.Google Scholar
Sobolev, N.V., Kuznetsova, I.K., and Zyuzin, N.I. (1968). J. Petrol. 9, 253-80.CrossRefGoogle Scholar
Smyth, J.R., and Hatton, C.J. (1977). Earth Planet. Sci. Lett. 34, 284-90.CrossRefGoogle Scholar
Strong, H.M., and Chrenko, R.M. (1971). J. Phys. Chem. 75, 1838-43.CrossRefGoogle Scholar
Strong, H.M. and Hanneman, R.E. (1967). J. Chem. Phys. 46, 3668-76.CrossRefGoogle Scholar
Switzer, G., and Melson, W.G. (1969). Smithsonian Contrib. Earth Sci. 1, 1-9.Google Scholar
White, A.J.R. (1966). Am. Mineral. 49, 883-8.Google Scholar