Hostname: page-component-cd9895bd7-gbm5v Total loading time: 0 Render date: 2024-12-23T14:41:11.909Z Has data issue: false hasContentIssue false
  • English
  • Français

Mineral Chemistry of Leucitites from Visoke Volcano (Virunga Range, Rwanda): Petrogenetic Implications

Published online by Cambridge University Press:  05 July 2018

G. Marcelot  and
J. Ph. Rançon
G. Marcelot
Affiliation:
Laboratoire de Pétrologie, Université de Bretagne Occidentale 29287 Brest Cedex, France
J. Ph. Rançon
Affiliation:
Bureau de Recherches Géologiques et Minières, Département Géologie, BP 6009, 45060 Orléans Cedex, France
Get access Rights & Permissions [Opens in a new window]

Abstract

The Visoke complex is one of the main Quaternary volcanic centres of the Virunga Range, located north of lake Kivu. Mineralogical (microprobe) data are given for two representative leucitite lavas; one sample contains a complex coarse-grained xenolith (phlogopite, diopside, leucite, titanomagnetite, perovskite and apatite) and megacrysts of pyroxene, phlogopite and olivine scattered in fine-grained leucite-rich host lava. Compared with the typical leucite-dominated, low-pressure phenocryst assemblage of the two samples studied, the chemical trends of ferromagnesian crystals suggest an earlier igneous event (high-pressure phenomenon) strongly related to the leucite-bearing magma suite.

Keywords

mineral chemistryleucititesVisoke VolcanoRwanda
Type
Petrology and Geochemistry
Information
Mineralogical Magazine , Volume 52 , Issue 368 , December 1988 , pp. 603 - 613
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1988

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

Barton, M. and Hamilton, D.L. (1978) Contrib. Mineral. Petrol. 66, 419.CrossRefGoogle Scholar
Barton, M. and Hamilton, D.L. (1982) Mineral. Mag. 45, 267-78.CrossRefGoogle Scholar
Bell, K. and Powell, J.L. (1969) J. Petrol. 10, 536-72.CrossRefGoogle Scholar
Brown, F.H. and Carmichael, I.S.E. (1969) Lithos, 2, 239-60.CrossRefGoogle Scholar
Carmichael, I.S.E. (1967) Contrib. Mineral. Petrol. 15, 246-6.CrossRefGoogle Scholar
Cundari, A. (1975) Ibid. 53, 129-44.Google Scholar
Denaeyer, M.-E. (1972) Ann. Mus. Roy. Aft. Centr., Tervuren, Geol. Ser. no. 72.Google Scholar
Denaeyer, M.-E. and Schellinck (1965) Ibid. no. 49.Google Scholar
Edgar, A.D. and Arima, M. (1983) Mineral. Mag. 47, 111-9.CrossRefGoogle Scholar
Edgar, A.D. and Arima, M. Green, D.H., and Hibberson, W.O. (1976) J. Petrol. 17, 339-56.CrossRefGoogle Scholar
Faust, G.T. (1963) Schweiz. Mineral. Petrogr. Mitt. 43, 165-95.Google Scholar
Frey, F.A., Green, D.H., and Roy, S.D. (1978) J. Petrol. 19, 465-513.Google Scholar
Gibb, J.G.A. (1973) Ibid. 14, 203-30.Google Scholar
Guibert, P. (1978) Thesis Univ. Geneve, 152 pp.Google Scholar
Gupta, A.K. and Yagi, D. (1980) In Petrology and genesis of leucite-bearing rocks. (Wyllie, P. J., ed.), Chicago.CrossRefGoogle Scholar
Holmes, A. and Harwood, H.F. (1937) Mem. Geol. Surv. Uganda, 3, 130-0.Google Scholar
Irving, A.J. (1974) Bull. Geol. Soc. Am. 85, 1503-14.2.0.CO;2>CrossRefGoogle Scholar
Luth, W.C. (1967) J. Petrol. 8, 372-41..CrossRefGoogle Scholar
Marcelot, G., Ranéon, J.P., and Demange, J. (1985) J. Volcanol. Geotherm. Res. 26, 99-129.CrossRefGoogle Scholar
Modreski, P.J. and Boettcher, A.L. (1973) Am. J. Sci. 273, 385-41..CrossRefGoogle Scholar
Papike, J.J., Cameron, K.L., and Baldwin, K. (1974) Geol. Soc. Am. Abstracts With Programs, 6, 1053-54.Google Scholar
Pouclet, A. (1976) Thesis. Univ. Paris Sud 610 pp.Google Scholar
Pouclet, A. (1977) Rev. Geogr. Phys. Geol. Dyn. 2, 19 (2), 115-24.Google Scholar
Pouclet, A. Menot, R.P., and Piboule, M. (1983) Bull. Mineral., 106, 607-22.Google Scholar
Ranéon, J.P. and Demange, J. (1983) Rapport BRGM, 192 GTH, 130 pp.Google Scholar
Robert, J.L. (1976) Chem. Geol. 17, 213-27.CrossRefGoogle Scholar
Sheraton, J.W. and Cundari, A. (1980) Contrib. Mineral. Petrol. 71, 417-27.CrossRefGoogle Scholar
Shervais, J.W. (1982) Earth Planet. Sci. Lett. 59, 101-18.CrossRefGoogle Scholar
Simkin, T. and Smith, J.V. (1970) J. Geol. 78, 207-19.CrossRefGoogle Scholar
Stormer, J.C. (1973) Geochim. Cosmochim. Acta. 37, 1815-21.CrossRefGoogle Scholar
Thonnard, R.L.G., Denaeyer, M.E., and Antun, P. (1965) Carte volcanologique des Virunga au 1/50 O00e. Institut Grographique Militaire—-Bruxelles.Google Scholar
Van Kooten, G.K. (1980) J. Petrol. 21, 651-84.CrossRefGoogle Scholar
Wendlandt, R.F. (1977) Carnegie Inst. Washington Yearb. 77, 534-9.Google Scholar