Hostname: page-component-cd9895bd7-jn8rn Total loading time: 0 Render date: 2024-12-24T14:17:31.687Z Has data issue: false hasContentIssue false
  • English
  • Français

Reconsideration of ‘soda-minettes’

Published online by Cambridge University Press:  05 July 2018

Sharon W. Bachinski
Sharon W. Bachinski*
Affiliation:
Department of Geology, University of New Brunswick, Fredericton, New Brunswick, E3B 5A3, Canada
Get access Rights & Permissions [Opens in a new window]

Abstract

It is shown here that dyke rocks of type localities for ‘soda-minettes’ are not minettes (= lamprophyres dominated by phlogopite and K-rich feldspar). It has long been suggested that ‘soda-minette’ also be applied to otherwise normal minettes from elsewhere that carry modally variable amounts of groundmass aegirine and/or, more commonly, arfvedsonitic to riebeckitic amphibole. Despite the presence of sodic pyriboles, these rocks are poorer in Na2O then minettes lacking these phases. ‘Soda-minette’ is thus misleading and self-contradictory to the many petrologists to whom ‘soda-’ legitimately connotes that the rock in question either has K/Na < 1 and/or is rich in albitic feldspar. To eliminate this ambiguity it is recommended, with the approval of twenty-six other petrologists, that ‘soda-minette’ no longer be used as a rock name. As minettes with Na-pyribole(s) are markedly K-rich and most are both ultrapotassic and peralkaline, independent of the modal abundance of the Na-pyrobile, it is suggested that one of these three chemical characteristics be utilized adjectivally in naming these minettes.

Keywords

minettesoda-minettelamprophyre
Type
Petrology
Information
Mineralogical Magazine , Volume 50 , Issue 356 , June 1986 , pp. 199 - 204
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1986

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.)

Footnotes

*

The editors regret to report the death of Sharon Bachinski on 14 March 1986.

References

Barth, T.F.W. (1952) Theoretical Petrology. Wiley, New York.Google Scholar
Bergman, S.C. (1985) Lamproites and other potassiumrich igneous rocks: a review of their occurrence, mineralogy and geochemistry. Proc. Conf. Alkaline Igneous Rocks, Edinburgh.Geol. Soc. London (in press).Google Scholar
Brogger, W.C. (1898) Die Eruptivgesteine des Kristianagebietes III. Das Ganggefolge des Laurdalits. Videnskabsselsk. Skr., I. Mat.-Natur. Kl. 1897,no. 6.Google Scholar
Carmichael, I.S.E. (1962) Pantelleritic liquids and their phenocrysts. Mineral. Mag, 33, 86-113.Google Scholar
Comucci, P. (1937). Di una singolare del ghiacciaio Baltoro (Karakorum). Rend. R. Ace. Lincei,25 (6th series), 648-734.Google Scholar
Delesse, M. (1856) Mémoire sur les roches des Vosges. Minette. Ann des Mines, 10 (5th series, Memoires), 517-78.Google Scholar
De Marco, L. (1958) Su alcuni filoni lamproflrici radioattivi del complesso Sesia-Lanzo. Comit. Naz. Ric. Nucl., Std. Ric. Div. Geomineral, Italia, 1, 3-30.Google Scholar
Ehrenberg, S.N. (1978) Petrology of Potassic Volcanic Rocks and Ultramafic Xenoliths from the Navajo Volcanic Field, New Mexico and Arizona.Ph.D. thesis, Univ. of California at Los Angeles.Google Scholar
Hall, A. (1982) The Pendennis peralkaline minette. Mineral. Mag, 45, 257-66.Google Scholar
Hasan, Z.-U. (1969) Petrology of the soda-minette dikes from Håöya, Langesundsfjord, S.N.rway. Norsk Geol. Tidsskr, 49, 159-70.Google Scholar
Holmes, A. (1920) The Nomenclature of Petrology. Allen & Unwin, London.Google Scholar
Jahn, B., Sun, S.S., and Nesbitt, R.W. (1979) REE distribution and petrogenesis of the Spanish Peaks igneous complex, Colorado. Contrib. Mineral. Petrol, 70, 281-98.Google Scholar
Jaques, A.L., Lewis, J.D., Smith, C.B., Gregory, G.P., Ferguson, J., Chappell, B.W., and McCulloch, M.T. (1984) The diamond-bearing ultrapotassic (lamproitic) rocks of the West Kimberley region, Western Australia. In Kimberlites. I: Kimberlites and Related Rock. (J. Kornprobst, ed.), pp. 225-54. Elsevier, Amsterdam.Google Scholar
Johannsen, A. (1935) A Descriptive Petrography of Igneous Rocks. Vol. III. Univ. of Chicago Press, Chicago.Google Scholar
Johnson, R.B. (1964) Walsen composite dike near Walsenberg, Colorado. U.S. Geol. Surv. Prof. Paper, 501-B, B69–B73.Google Scholar
Johnson, R.B. (1968) Geology of the igneous rocks of the Spanish Peaks region, Colorado. U.S. Geol. Surv. Prof. Paper 594-G, 1-47.Google Scholar
Joplin, G.A. (1966) On lamprophyres. X Proc R.Soc. New South Wales, 99, 37-44.Google Scholar
Kirchner, J.G. (1979) Petrographic significance of a carbonate-rich lamprophyre from Squaw Creek, northern Black Hills, South Dakota. Am. Mineral, 64, 986-92.Google Scholar
Mitchell, R.H. (1985) A review of the mineralogy of lamproites. Trans. Geol. Soc. S. Africa,Spec. Vol. 'Alkaline and Alkaline-Ultrabasic Rocks and their Xenoliths’ (in press).Google Scholar
Nêmec, D. (1973) Differentiation series of minettes in the Central Bohemian Pluton. J. Geol, 81, 632-42.Google Scholar
Nêmec, D. (1974) Petrochemistry of the dykes rocks of the Central Bohemian Pluton. Neues Jahrb. Mineral. Mh. 193-209.Google Scholar
Nêmec, D. (1975a) Petrographie der lamprophyrischen und lamproiden Ganggesteine im Nordostteil der Bohmischen Masse (ĈSSR). Z. geol. Wiss. Berlin, 3, 23-36.Google Scholar
Nêmec, D. (1975b) Petrochemie unde Genese der lamprophyrischen und lamproiden Ganggesteine im Nordostteil der Bohmischen Masse ((ĈSSR). Z. geol. Wiss. Berlin, 3, 37-52.Google Scholar
Nêmec, D. (1978) Ganggesteine auf der Störung von Treble (als Beispiel einer an eine Tiefenstörung gebundenen Gangschar). Z. geol. Wiss. Berlin, 6, 1211-17.Google Scholar
Nicholls, J.W. (1969) Studies of the Volcanic Petrology of the Navajo-Hopi Area, Arizona. Ph.D. thesis, Univ. of California at Berkeley.Google Scholar
Renouf, J.T., and Bishop, A.C. (1971) The geology of the Fort Regent road tunnel. Bull. Soc. Jersiaise, 20, 275-83.Google Scholar
Rock, N.M.S. (1984) Nature and origin of calc-alkaline lamprophyres: minettes, vogesites, kersantites and spessartites. Trans. R. Soc. Edinburgh, 74, 193-227.Google Scholar
Schulze, D.J., Smith, J.V., and Nemec, D. (1985) Mica chemistry oflamprophyres from the Bohemian Massif, Czechoslovakia. Neues Jahrb. Mineral. Abh.(in press)..Google Scholar
Shand, S.J. (1927) Eruptive Rocks. Thomas Murby, London.Google Scholar
Smith, H.G. (1933) Some lamprophyres of the Channel Islands. Proc. Geol. Assoc. London, 44, 121-30.Google Scholar
Smith, H.G. (1936a) New lamprophyres and monchiquites from Jersey. Q.J. Geol. Soc. London, 92, 365-81.Google Scholar
Smith, H.G. (1936b) The South Hill lamprophyre, Jersey. Geol. Mag, 73, 87-91.Google Scholar
Sorensen, H. (ed.) (1974) The Alkaline Rocks. Wiley, New York.Google Scholar
Streckeisen, A. (1979) Classification and nomenclature of volcanic rocks, lamprophyres, carbonatites, and melilitic rocks: Recommendations and suggestions of the IUGS Subcommission on the Systematics of Igneous Rocks. Geology, 7, 331-5.Google Scholar
Tomkeieff, S.I. (1983) Dictionary of Petrology. Wiley, New York.Google Scholar
Tyrrell, G.W. (1926) The Principles of Petrology. Methuen, London.Google Scholar
Velde, D. (1967) Sur un lamprophyre hyperalcalin potassique: la minette de Sisco (ile de Corse). Bull. Soc. franc. Mineral. Cristallogr, 90, 214-23.Google Scholar
Velde, D. (1968) A new occurrence of priderite. Mineral. Mag, 36, 867-70.Google Scholar
Velde, D. (1970) Remarques sur la nomenclature des minettes. C.R. Sommaires Soc. geol. France, 6, 222-3.Google Scholar
Velde, D. (1971) Les lamprophyres á feldspath alcalin et biotite: minettes et roches voisines. Contrib. Mineral. Petrol, 30, 216-39.Google Scholar
Venturelli, G., Thorpe, R.S., Dal Piaz, G.V., Del Moro, A., and Potts, P.J. (1984) Petrogenesis of calc-alkaline, shoshonitic and associated ultrapotassic Oligocene volcanic rocks from the Northwestern Alps, Italy. Ibid. 86, 209-20.Google Scholar
Viterbo, C. and Zanettin, B. (1959) I filoni lamprofirici dell'Alto Baltoro (Karakorum). Caratteri chimicopetrografici. Mem. Acad. Patavina SS.LL.AA.: Cl. Sci. Mat. Nat, 71, 3-39.Google Scholar
Wagner, C. and Velde, D. (1985) Mineralogy of two peralkaline, arfvedsonite-bearing minettes. A new occurrence of Zn-rich chromite. Bull. Mineral, 108, 173-87.Google Scholar
Weed, W.H., and Pirsson, L.V. (1895) On the igneous rocks of the Sweet Grass Hills, Montana. Am. J. Sci.50 (3rd series), 309-13.Google Scholar
Williams, H. (1936). Pliocene volcanoes of the Navajo- Hopi country. Bull. Geol. Soc. Am, 47, 111-72.Google Scholar
Turner, F.J., and Gilbert, C.M. (1954) Petrography. W. H. Freeman, San Francisco.Google Scholar
Wimmenauer, W. (1973) Lamprophyre, Semilamprophyre und anchibasaltische Ganggesteine. Fortschr. Mineral, 51, 3-67.Google Scholar