Abstract
Basic inclusions of two types occur in a kimberlitic diatreme at Kayrunnera in northwestern New South Wales. Type I inclusions comprise assemblages of clinopyroxene+garnet+rutile±plagioclase ±quartz±K-feldspar±scapolite±sphene±apaite. Type II inclusions have assemblages of clinopyroxene +garnet+kyanite+quartz±plagioclase and are lower in Ti, total Fe, and higher in Al and have a higher Mg/Mg+gSFe ratio than the Type I inclusions. Experimental and theoretical data indicate that both inclusion types equilibrated at between 850–900 ° C and 18–23 kb. Due to their low concentrations of incompatible elements, the Type I inclusions are considered to represent a basaltic melt derived from an Fe-rich mantle source rock, and not to be the product of fractionation. The Type II inclusions are believed to represent cumulates which formed from a basaltic magma. The presence of sulphur rich scapolite in the Type I inclusions extends the range of P-T conditions from which this mineral has been reported thus adding further credence to the hypothesis that it may act as a stable repository for S and CO2 in the crust and upper mantle.
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References
Banno, S.: Classification of eclogites in terms of physical conditions of their origin. Phys. Earth Planet. Inter. 3, 405–421 (1970)
Banno, S., Matsui, Y.: Eclogite types and partitioning of Mg, Fe and Mn between clinopyroxene and garnet. Proc. Japan. Acad. 41, 716–721 (1965)
Beeson, M.H., Jackson, E.D.: Origin of the garnet pyroxenite xenoliths at Salt Lake Crater, Oahu. Mineral Soc. Amer. Spec. Pap. 3, 95–112 (1970)
Byerly, G.R., Melson, W.G., Vogt, P.R.: Rhyodacites, andesites, ferrobasalts and ocean tholeiites from the Galapagos spreading centre. Earth Planet. Sci. Lett. 30, 215–221 (1976)
Cawthorn, R.G., Collerson, K.D.: The recalculation of pyroxene end member parameters and the estimation of ferrous and ferric iron content from electron microprobe data. Am. Mineralogist 59, 1203–1208 (1975)
Clark, J.R., Papike, J.J.: Crystal chemical characterisation of omphacites. Am. Mineralogist 53, 840–868 (1968)
Edwards, A.C.: Tectonic implications of the immobile trace element geochemistry of mafic rocks bounding the Wonominta Block. J. Geol. Soc. Aust. (in press)
Gleadow, A.J.W., Edwards, A.C.: Mineralogical note: fission track age of a basic inclusion from the Kayrunnera kimberlitic breccia pipe. J. Geol. Soc. Aust. 25, 359 (1978)
Goldsmith, J.R., Newton, R.C.: Scapolite-plagioclase stability relations at high pressures in the system Na Al Si3O8-Ca Al2Si2O8-CaCO3-CaSO4. Am. Mineralogist 62, 1063–1081 (1977)
Green, D.H.: The origin of ‘eclogites’ from Salt Lake Crater, Hawaii. Earth Planet. Sci. Lett. 1, 414–420 (1966)
Green, D.H., Ringwood, A.E.: An experimental investigation of the gabbro to eclogite transformation and its petrological applications. Geochem. Cosmochim. Acta 31, 767–833 (1967)
Green, D.H., Ringwood, A.E.: A comparison of recent experimental data on the gabbro-garnet granulite-eclogite transformation. J. Geol. 80, 277–288 (1972)
Green, D.H., Edgar, A.D., Beasley, P., Kiss, E., Ware, N.G.: Upper mantle source for some Hawaiites, Mugearites and Benmoreites. Contrib. Mineral. Petrol. 48, 33–43 (1974)
Green, T.H.: An experimental investigation of subsolidus assemblages formed at high pressure in high alumina basalt, kyanite eclogite and grospydite compositions. Contrib. Mineral. Petrol. 16, 84–114 (1967)
Hensen, B.J.: The stability of pyrope-grossular garnet with excess silica. Contrib. Mineral. Petrol. 55, 279–292 (1976)
Irving, A.J.: Geochemical and high pressure experimental studies of garnet pyroxenite and pyroxene granulite from the Delegate basaltic pipes, Australia. J. Petrol. 15, 1–40 (1974)
Lappin, M.A.: The evolution of a grospydite from the Roberts Victor Mine, South Africa. Contrib. Mineral. Petrol. 66, 229–241 (1978)
Le Bas, M.J.: The role of aluminium in igneous clinopyroxenes with relation to their parentage. Am. J. Sci. 260, 267–288 (1963)
Lovering, J.F., White, A.R.J.: The significance of primary scapolite in granulitic inclusions from deep seated pipes. J. Petrol. 5, 195–218 (1964)
Lovering, J.F., White, A.R.J.: Granulitic and eclogitic inclusions from basic pipes at Delegate, Australia. Contrib. Mineral. Petrol. 21, 9–52 (1969)
Manson, V.: Geochemistry of basaltic rocks: major elements. In: Basalts (H.H. Hess and A. Poldervaart, ed.), Vol. 1, pp. 215–270. New York, London, Sydney: Interscience 1967
Mason, P.K., Frost, M.T., Reid, S.J.B.: Computer programs for calculating corrections in quantitative X-ray microanalysis. Nat. Phys. Lab. (U.K.) I.M.S. Rep. 2 (1969)
Newton, R.C., Goldsmith, J.R.: Stability of the scapolite meionite (3 Ca Al2 Si2O2 CaCO3) at high pressures and storage of CO2 in the deep crust. Contrib. Mineral. Petrol. 49, 49–62 (1975)
Raheim, A., Green, D.H.: Experimental determination of the temperature and pressure dependence of the Fe-Mg partition coefficient for co-existing garnet and clinopyroxene. Contrib. Mineral. Petrol. 48, 179–203 (1974)
Sobolev, N.V., Kuznetsova, I.K., Zyurzin, N.I.: The petrology of grospydite xenoliths from the Zagadochnaya kimberlite pipe in Yakutia. J. Petrol. 9, 253–280 (1968)
Stracke, K.J., Ferguson, J., Black, L.P.: The tectonic setting of kimberlites in south-eastern Australia. Extended. Abstr. 2nd International Kimberlite Conference. Santa Fe (1977)
Thompson, A.B.: The instability of feldspar in metamorphism, In: The Feldspars (W.S. MacKenzie and J. Zussman, ed.) Manchester: University Press 1972
Wilkinson, J.F.G.: The petrography of basaltic rocks. In: Basalts (H.H. Hess and A. Poldervaart, ed.), Vol. 1, pp. 163–214. New York, London, Sydney: Interscience 1967
Wilkinson, J.F.G.: Garnet clinopyroxenite inclusions from diatremes in the Gloucester area, New South Wales, Australia. Contrib. Mineral. Petrol. 46, 275–299 (1974)
Wilkinson, J.F.G.: Some subcalcic clinopyroxenites from Salt Lake Crater, Oahu and their petrogenetic significance. Contrib. Mineral. Petrol. 58, 181–201 (1976)
Wilkinson, J.F.G., Binns, R.A.: Relatively iron-rich lherzolite xenoliths of the Cr-diopside suite: a guide to the primary nature of an orogenic tholeiitic andesite magmas. Contrib. Mineral. Petrol. 65, 199–212 (1977)
Wood, B.J.: The partitioning of iron and magnesium between garnet and clinopyroxene. Carnegie Inst. Washington Year Book 75, 571–574 (1976)
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Edwards, A.C., Lovering, J.F. & Ferguson, J. High pressure basic inclusions from the Kayrunnera kimberlitic diatreme in New South Wales, Australia. Contr. Mineral. and Petrol. 69, 185–192 (1979). https://doi.org/10.1007/BF00371861
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DOI: https://doi.org/10.1007/BF00371861