Skip to main content
SpringerLink
Log in

A tertiary lamprophyre dike with high pressure xenoliths and megacrysts from Wiedemanns Fjord, East Greenland

  • Published:
Contributions to Mineralogy and Petrology Aims and scope Submit manuscript

Abstract

Lamprophyric dikes, mainly of camptonite/monchiquite affinities occur in the Wiedemanns Fjord area. One example contains a complex assemblage of olivine-orthopyroxene-chrome spinel nodules, megacrysts of kaersutite, diopside, strongly reverse-zoned green salite and various spinel phases. Microprobe analyses are presented for all these phases and for the lilac-coloured titansalites and strongly-coloured kaersutites of the groundmass. It is concluded that these minerals record evolution under various P, T and oxidation regimes during the formation of a lamprophyric parent magma. The nodules provide evidence for deep fractures in this area supposedly associated with early rifting in the North Atlantic.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  • Aoki, K.: Petrology of Kaersutite-bearing ultramafic and mafic inclusions in Iki Island, Japan. Contr. Mineral. and Petrol. 25, 270–283 (1970)

    Google Scholar 

  • Aoki, K., Kushiro, I.: Some clinopyroxenes from ultramafic inclusions in Dreiser Weiher, Eifel. Contr. Mineral. and Petrol. 18, 326–337 (1968)

    Google Scholar 

  • Beckinsale, R. D., Brooks, C. K., Rex, D. C.: K—Ar ages for the Tertiary of East Greenland. Geol. Soc. Denmark Bull. 20, 27–37 (1970)

    Google Scholar 

  • Best, M. G.: Kaersutite-peridotite inclusions and kindred megacrysts in basanitic lavas, Grand Canyon, Arizona. Contr. Mineral. and Petrol. 27, 25–44 (1970)

    Google Scholar 

  • Bhattarcharji, S.: Mechanics of flow differentiation in ultramafic and mafic sills. J. Geol. 75, 101–112 (1967)

    Google Scholar 

  • Binns, R. A.: High-pressure megacrysts in basanitic lavas near Armidale, New South Wales. Am. J. Sci. 267A, 33–49 (1969)

    Google Scholar 

  • Binns, R. A., Duggan, M. B., Wilkinson, J. F. G.: High pressure megacrysts in alkaline lavas from northeastern New South Wales. Am. J. Sci. 269, 132–168 (1970)

    Google Scholar 

  • Borley, G. D., Suddaby, P., Scott, P.: Some xenoliths from the alkalic rocks of Teneriffe, Canary Island. Contr. Mineral. and Petrol. 31, 102–114 (1971)

    Google Scholar 

  • Bottinga, Y., Kudo, A., Weill, D.: Some observations on oscillatory zoning and crystallization of magmatic plagioclase. Am. Mineralogist 51, 792–806 (1966)

    Google Scholar 

  • Brooks, C.K.: The Tertiary of Greenland: a volcanic and plutonic record of continental break-up. Am. Assoc. Petroleum Geologists Mem. 83 (1973a, in press)

  • Brooks, C. K.: Rifting and doming in southern East Greenland. Nature Phys. Sci. 244, 23–25 (1973b)

    Google Scholar 

  • Brown, P. E.: A layered plutonic complex of alkali basalt parentage: the Lillioise intrusion, east Greenland. J. Geol. Soc. Lond. 129, 405–418 (1973)

    Google Scholar 

  • Deer, W. A., Howie, R. A., Zussmann, J.: Rock-forming minerals. London: Longmans 1963

    Google Scholar 

  • Dickey, J. S.: Eclogitic and other inclusions in the mineral breccia member of the Deborah Volcanic formation at Kakanui, New Zealand. Am. Mineralogist 53, 1304–1319 (1968)

    Google Scholar 

  • Drever, H. I.: Imiscibility in the picritic intrusion at Igdlorssuit, West Greenland. XXI Internat. Geol. Congr. 13, 47–58 (1960)

    Google Scholar 

  • Fawcett, J. J., Brooks, C., Rucklidge, J. C.: Geological investigations in East Greenland Pt. XI Chemical Petrology of Tertiary flood basalt from the Scoresby Sund area. Medd. Grönland, 195 (6), 1–54 (1973)

    Google Scholar 

  • Ferguson, J., Currie, K. L.: Evidence of liquid immiscibility in alkaline ultrabasic dikes at Callander Bay, Ontario. J. Petrol. 12, 561–585 (1971)

    Google Scholar 

  • Frisch, T., Schmincke, H. U.: Petrology of clinopyroxene-amphibole inclusions from the Roque Nublo Volcanics, Gran Canaria, Canary Island. (Petrology of the Roque Nublo Volcanics, 1). Bull. Volcanol. 33, 1073–1088 (1969)

    Google Scholar 

  • Frisch, T., Schmincke, H. U.: A comment on “Formation of the hour-glass structure in augite” by D. F. Strong. Mineral. Mag. 38, 251–252 (1971)

    Google Scholar 

  • Frisch, T., Wright, J. B.: Chemical composition of high pressure megacrysts from Nigerian Cenozoic lavas. Neues Jahrb. Mineral. Monatsh. 289–304 (1971)

  • Gass, I. G.: The ultrabasic volcanic assemblage of the Troodos Massif, Cyprus. In: Wyllie, P. J. (ed.), Ultramafic and related rocks, p. 121–134. New York: Wiley 1967

    Google Scholar 

  • Gibb, F. G. F.: Flow differentiation in the xenolithic ultrabasic dykes of the Cuillins and Strathaird peninsula, Isle of Skye. J. Petrol. 9, 411–443 (1968)

    Google Scholar 

  • Girod, M.: Le massif volcanique de L'Atokar (Hoggar, Sahara Algérien). Étude petrographique, structurele et volcanologique. Éditions Centre National Recherches Scientifique. Centre des Recherches sur les Zones Arides. Sér. Géologique 12, 158 pp. (1971)

  • Green, T. H., Ringwood, A. E.: The genesis of basaltic magmas. Contr. Mineral. and Petrol. 15, 103–190 (1967)

    Google Scholar 

  • Hamm H.-M., Vieten K.: Zur Berechnung der kristallchemischen Formel und des Fe3+-Gehaltes von Klinopyroxen aus Elektronenstrahl-Mikroanalysen. Neues Jahrb. Mineral. Monatsh. 310–314 (1971)

  • Irvine, T. N.: Chromian spinel as a petrogenetic indicator. Pt. I. Theory. Can. J. Earth Sci. 2, 648–672 (1965)

    Google Scholar 

  • Irvine, T. N.: Chromian spinel as a petrogenetic indicator. Pt. 2. Petrologic applications. Can. J. Earth Sci. 4, 71–103 (1967)

    Google Scholar 

  • Kushiro, I.: Clinopyroxene solid solutions. Part I. The CaAl2SiO6 component. Japan. J. Geol. Geography 33, 212–220 (1962)

    Google Scholar 

  • Le Bas, M. J.: The role of aluminium in igneous clinopyroxenes with relation to their parentage. Am. J. Sci. 260, 267–288 (1962)

    Google Scholar 

  • MacGregor, I. D.: Mineralogy of model mantle compositions. In: Wyllie, P. J. (ed.), Ultramafic and related rocks, p. 382–393. New York: Wiley 1967

    Google Scholar 

  • Mason, B.: Eclogitic xenoliths from volcanic breccia at Kakanui, New Zealand. Contr. Mineral. and Petrol. 19, 316–327 (1968)

    Google Scholar 

  • Philpotts, A. R.: Immiscibility between feldspathic and gabbroic magmas. Nature Physical Sci. 229, 107–109 (1971)

    Google Scholar 

  • Philpotts, A. R.: Density, surface tension and viscosity of the immiscible phase in a basic, alkaline magma. Lithos 5, 1–18 (1972)

    Google Scholar 

  • Philpotts, A. R., Hodgson, C. J.: Role of liquid immiscibility in alkaline rock genesis. XXIII. Internat. Geol. Congr. 2, 175–188 (1968)

    Google Scholar 

  • Ross, C. S., Foster, M. D., Myers, A. T.: Origin of dunites and olivine-rich inclusions in basaltic rocks. Am. Mineralogist 39, 693–737 (1954)

    Google Scholar 

  • Rucklidge, J. C., Gasparrini, E. L.: Specifications of a computer program for processing electron microprobe analytical data. EMPADR VII. Department of Geology, University of Toronto, Toronto, Ontario. (1969)

    Google Scholar 

  • Rucklidge, J. C., Gasparrini, E., Smith, J. V., Knowles, C. R.: X-ray emission microanalysis of rock-forming minerals. VIII. Amphiboles. Can. J. Earth Sci. 8, 1171–1183 (1971)

    Google Scholar 

  • Simkin, T.: Flow differentiation in the pictritic sills of north Skye. In: Wyllie, P. J. (ed.), Ultramafic and related rocks, p. 64–69, New York: Wiley 1967

    Google Scholar 

  • Smith, W. C.: A review of some problems of African carbonatites. Geol. Soc. Lond. Quart. J. 112, 187–220 (1956)

    Google Scholar 

  • Upton, B. J. G.: The petrology of a camptonite sill in South Greenland. Medd. Grönland 169 (II), 1–19 (1965)

    Google Scholar 

  • Varne, R.: Hornblende lherzolite and the upper mantle. Contr. Mineral. and Petrol. 27, 45–51 (1971)

    Google Scholar 

  • Vincent, E. A.: Hornblende-lamprophyre dykes of basaltic parentage from the Skaergaard area, East Greenland. Geol. Soc. London Quart, J. 109, 21–49 (1953)

    Google Scholar 

  • Wager, L. R.: Geological investigations in East Greenland, Pt. I, General geology from Angmagssalik to Kap Dalton. Medd. Grönland 105 (2), 1–46 (1934)

    Google Scholar 

  • Wager, L. R.: Geological investigations in East Greenland, Pt. IV. The stratigraphy and tectonics of Knud Rasmussens Land and the Kangerdlugssuaq region. Medd. Grönland 134 (5), 1–64 (1947)

    Google Scholar 

  • Wager, L. R., Deer, W. A.: A dyke swarm and crustal flexure in East Greenland. Geol. Mag. 74, 39–46 (1938)

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Institute of Petrology, University of Copenhagen, Denmark

    C. Kent Brooks

  2. Department of Geology, University of Toronto, USA

    John C. Rucklidge

Authors
  1. C. Kent Brooks
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. John C. Rucklidge
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Brooks, C.K., Rucklidge, J.C. A tertiary lamprophyre dike with high pressure xenoliths and megacrysts from Wiedemanns Fjord, East Greenland. Contr. Mineral. and Petrol. 42, 197–212 (1973). https://doi.org/10.1007/BF00371585

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00371585

Keywords

Search

Navigation