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Petrogenesis of Archaean ultrabasic and basic volcanics: Evidence from rare earth elements

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Abstract

Rare earth element (REE) and major element data are presented on 44 Archaean samples which include spinifex textured ultramagnesian lavas (STPK) spinifex textured basalts (STB) and low MgO tholeiites. The samples come from the Yilgarn and Pilbara Blocks (W. Australia), Barberton (South Africa), Belingwe and Que Que (Rhodesia), Abitibi (Canada) and the 3.7 b.y. Isua Belt of Western Greenland. In addition REE data are given on three near primitive mid-ocean ridge basalts (MORB) and a glassy MORB-type basalt from Taiwan. We suggest that REE patterns, particularly the light REE and Eu, can be affected by metamorphism, but argue that the consistency of pattern from samples both within and between areas enables recognition of primary patterns. La/Sm ratios of 2.7 b.y. STPK are characterised by being lower than those of associated basalts. The 3.5 b.y. STPK Barberton material does not show this feature but instead displays significant heavy REE depletion. The separation of garnet from these liquids is suggested as a possible mechanism for the high CaO/Al2O3 ratios, (Al loss) and the heavy REE and Sc depletion. The REE data on Barberton material is equivocal on the derivation of the so-called basaltic komatiites from the peridotitic komatiites. However, REE analyses on STPK and high magnesian lavas from elsewhere suggests that crystal fractionation is not a viable mechanism to produce one from the other. We suggest instead, that varying amounts of partial melting of different sources is responsible for the spectrum of compositions. The STB appear to be an easily recognised rock type within the Archaean. They are characterised by quench (clinopyroxene) textures and a light REE enriched pattern. It is suggested that these are near primary melts and that their REE patterns mirror their mantle source. We propose a two stage model for the 2.7 b.y. mafic complexes, in which, prior to the generation of ultrabasic magmas, the source underwent a small amount of partial melting which resulted in the removal of a melt enriched in incompatible elements. The depletion process could be achieved either during mantle diapirism or by upward migration of interstitial melts into an Archaean low velocity zone. The spread of La/Sm ratios in STPK and STB is used as an argument that the Archaean mantle was chemically heterogeneous and that the degree of heterogeneity was similar to that observed in modern ocean volcanics. As a result, partial melting of the mantle under different P-T conditions produced a spectrum of magma types. The information presently available on Archaean mafic and silicic magmatism and the incompleteness of geochemical data on present day tectonic environments are two major obstacles in formulating Archaean tectonic models. In addition a comparison of present day and Archaean ultramafic and silicic rocks suggests that plate tectonic models as presently understood may not be suitable analogues for all Archaean tectonic environments.

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References

  • Anhaeusser, C.R., Mason, R., Viljoen, M.J., Viljoen, R.P.: A reappraisal of some aspects of precambrian shield geology. Geol. Soc. Am. Bull. 80, 2175–2200 (1969)

    Google Scholar 

  • Arndt, N.T.: Melting relations of ultramafic lavas (komatiites) at one atmosphere and high pressure. Carnegie Inst. Wash. Yearbook 75, 555–561 (1976)

    Google Scholar 

  • Arndt, N.T., Naldrett, A.J., Pyke, D.R.: Komatiitic lavas of Munro Township: Their field, petrographic and chemical characteristics. J. Petrol. 18, 319–369 (1977)

    Google Scholar 

  • Arth, J.G., Hanson, G.N.: Geochemistry and origin of the early Precambrian crust of northeastern Minnesota. Geochim. Cosmochim. Acta 39, 325–362 (1975)

    Google Scholar 

  • Baragar, W.R.A.: Major-element geochemistry of the Noranda volcanic belt, Quebec-Ontario. Can. J. Earth Sci. 5, 773–790 (1968)

    Google Scholar 

  • Baxter, D.R.: The petrology and geochemistry of an ultramafic body near Ravensthorpe, Phillips River Goldfield, Western Australia. Unpubl. Hons. thesis, Adelaide Univ. (1971)

  • Bickle, M.J., Martin, A., Nisbet, E.G.: Basaltic and peridotitic komatiites and stromatolites above a basal unconformity in the Belingwe greenstone belt, Rhodesia. Earth Planet. Sci. Lett. 27, 155–162 (1975)

    Google Scholar 

  • Bridgwater, D., McGregor, V.R., Myers, J.S.: A horizontal tectonic regime in the Archaean of Greenland and its implications for early crustal thickening. Precambrian Res. 1, 179–197 (1974)

    Google Scholar 

  • Cawthorn, R.G., Strong, D.F.: The petrogenesis of komatiites and related rocks as evidence for a layered upper mantle. Earth Planet. Sci. Lett. 23, 369–375 (1974)

    Google Scholar 

  • Clarke, D.B.: Tertiary basalts of Baffin Bay: Possible primary magma from the mantle. Contrib. Mineral. Petrol. 25, 203–224 (1970)

    Google Scholar 

  • Condie, K.C.: Trace element geochemistry of Archaean greenstone belts. Earth-Sci. Rev. 12, 393–417 (1976)

    Google Scholar 

  • Condie, K.C., Baragar, W.R.A.: Rare-earth element distributions in volcanic rocks from Archaean greenstone belts. Contrib. Mineral. Petrol. 45, 237–246 (1974)

    Google Scholar 

  • Condie, K.C., Harrison, N.M.: Geochemistry of the Archaean Bulawayan Group, Midlands Greenstone Belt, Rhodesia. Precambrian Res. 3, 253–271 (1976)

    Google Scholar 

  • Dale, I.M., Henderson, P.: The partition of transition elements in phenocryst bearing basalts and the implications about melt structure. Twentyfourth Internat. Geol. Congress. Section 10, 105–111 (1972)

    Google Scholar 

  • Frey, F.A.: Rare earth abundances in a high-temperature peridotite intrusion. Geochim. Cosmochim. Acta 33, 1429–1447 (1969)

    Google Scholar 

  • Frey, F.A., Bryan, W.B., Thompson, G.: Atlantic Ocean floor: Geochemistry and petrology of basalts from Legs 2 and 3 of the Deep-Sea Drilling Project. J. Geophys. Res. 79, 5507–5527 (1974)

    Google Scholar 

  • Frey, F., Green, D.H.: The mineralogy, geochemistry, and origin of lherzolite inclusions in Victorian basanites. Geochim. Cosmochim. Acta 38, 1023–1059 (1974)

    Google Scholar 

  • Frey, F.A., Haskin, M.A., Poetz, J.A., Haskin, L.A.: Rare earth abundances in some basic rocks. J. Geophys. Res. 73, 6085–6098 (1968)

    Google Scholar 

  • Gast, P.W.: Trace element fractionation and the origin of tholeiitic and alkaline magma types. Geochim. Cosmochim, Acta 32, 1057–1086 (1968)

    Google Scholar 

  • Gill, R.C.O., Bridgwater, D.: The Ameralik dykes of west Greenland, the earliest known basaltic rocks intruding stable continental crust. Earth Planet. Sci. Lett. 29, 276–282 (1976)

    Google Scholar 

  • Glikson, A.Y.: Stratigraphy and evolution of primary and secondary greenstones; significance of data from shields of the southern hemisphere. In: The early history of the earth (B.F. Windley, ed.), 257–277. London: John Wiley and Sons 1976a

    Google Scholar 

  • Glikson, A.Y.: Trace element geochemistry and origin of early Precambrian acid igneous series, Barberton Mountain Land, Transvaal. Geochim. Cosmochim. Acta 40, 1261–1280 (1976b)

    Google Scholar 

  • Goodwin, A.M.: Metallogenic patterns and evolution of the Canadian shield. Geol. Soc. Australia Spec. Publ. No. 3, 157–174 (1971)

    Google Scholar 

  • Green, D.H.: Composition of basaltic magmas as indicators of conditions of origin: application to oceanic volcanism. Phil. Trans. Roy. Soc. London, Ser. A 268, 707–725 (1971)

    Google Scholar 

  • Green, D.H.: Genesis of Archaean peridotitic magmas and constraints on Archaean geothermal gradients and tectonics. Geology 3, 15–18 (1975)

    Google Scholar 

  • Green, D.H., Liebermann, R.C.: Phase equilibria and elastic properties of a pyrolite model for the oceanic upper mantle. Tectonophys. 32, 61–92 (1976)

    Google Scholar 

  • Green, D.H., Nesbitt, R.W., Sun, S-S.: Experimental evidence for primary liquids, extrusion temperature and conditions of origin of Archaean ultramafic liquids. (In preparation)

  • Green, D.H., Nicholls, I.A., Viljoen, M.J., Viljoen, R.P.: Experimental demonstration of the existence of peridotitic liquids in earliest Archaean magmatism. Geology 3, 11–14 (1975)

    Google Scholar 

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

    Google Scholar 

  • Hanson, G.N.: Rare earth analysis by isotopic dilution. 7th Material Research Symposium, Accuracy in trace analysis. National Bureau of Standards (in press)

  • Hart, S.R., Brooks, C.: The geochemistry and evolution of early precambrian mantle. Carnegie Inst. Wash. Yearbook 73, 967–970 (1974)

    Google Scholar 

  • Hart, S.R., Brooks, C., Krogh, T.E., Davis, G.L., Nava, D.: Ancient and modern volcanic rocks: A trace element model. Earth Planet. Sci. Lett. 10, 17–28 (1970)

    Google Scholar 

  • Hawkesworth, C.J., O'Nions, R.K.: The petrogenesis of some Archaean volcanic rocks from southern Africa. J. Petrol. (in press)

  • Jahn, B-M., Nyquist, L.E.: Crustal evolution in the early earthmoon system: contraints from Rb-Sr studies. In: Early history of the earth (B.F. Windley, ed.), pp. 55–76. J. Wiley and Sons 1976

  • Jahn, B-M., Shih, C-Y.: On the age of the Onverwacht Group, Swaziland sequence, South Africa. Geochim. Cosmochim. Acta 38, 873–885 (1974)

    Google Scholar 

  • Jahn, B-M., Shih, C-Y., Rama Murthy, V.: Trace element geochemistry of Archaean volcanic rocks. Geochim. Cosmochim. Acta 38, 611–627 (1974)

    Google Scholar 

  • Kay, R.W., Gast, P.W.: The rare earth content and origin of alkali-rich basalts. J. Geol. 81, 653–682 (1973)

    Google Scholar 

  • Kay, R., Hubbard, N.J., Gast, P.W.: Chemical characteristics and origin of oceanic ridge volcanic rocks, J. Geophys. Res. 75, 1585–1613 (1970)

    Google Scholar 

  • Kay, R.W., Senechal, R.G.: The rare earth geochemistry of the Troodos ophiolite complex. J. Geophys. Res. 81, 964–970 (1976)

    Google Scholar 

  • Langmuir, C.H., Bender, J.F., Bence, A.E., Hanson, G.N., Taylor, S.R.: Petrogenesis of basalts from the FAMOUS area: Mid-Atlantic Ridge. Earth Planet. Sci. Lett. 36, 133–156 (1977)

    Google Scholar 

  • Liou, J.G.: Mineralogy and chemistry of glassy basalts, Coastal Range ophiolites, Taiwan. Geol. Soc. Am. Bull. 85, 1–10 (1974)

    Google Scholar 

  • Loubet, M., Shimizu, N., Allegre, C.J.: Rare earth elements in alpine peridotites. Contrib. Mineral. Petrol. 53, 1–12 (1975)

    Google Scholar 

  • Masuda, Y., Nakamura, N., Kurasawa, H., Tanaka, T.: Precise determination of rare-earth elements in the Apollo 14 and 15 samples. Proc. Third Lunar Sci. Conf. Geochim. Cosmochim. Acta, Suppl. 3, 1307–1313 (1972)

    Google Scholar 

  • Moorbath, S., O'Nions, R.K., Pankhurst, R.J.: The evolution of early Precambrian crustal rocks at Isua, west Greenland — Geochemical and isotopic evidence. Earth Planet. Sci. Lett. 27, 229–239 (1975)

    Google Scholar 

  • Naldrett, A.J., Turner, A.R.: The geology and petrogenesis of a greenstone belt and related nickel sulfide mineralization. Precambrian Res. 5, 43–103 (1977)

    Google Scholar 

  • Naqvi, S.M., Rao, V.D., Narain, H.: The protocontinental growth of the Indian shield and the antiquity of its rift valleys. Precambrian Res. 1, 345–398 (1974)

    Google Scholar 

  • Nesbitt, R.W.: Skeletal crystal forms in the ultramafic rocks of the Yilgarn Block, Western Australia: Evidence for an Archean ultramafic liquid. Geol. Soc. Spec. Publ. 3, 331–350 (1971)

    Google Scholar 

  • Nesbitt, R.W., Mastins, H., Stolz, G.W., Bruce, D.R.: Matrix Corrections in trace element analysis by X-ray fluorescence: An extension of the Compton Scattering technique to long wavelengths. Chem. Geol. 18, 203–213 (1976)

    Google Scholar 

  • Nesbitt, R.W., Sun, S-S.: Geochemistry of Archaean spinifex textured peridotites and magnesian and low magnesian tholeiites. Earth Planet. Sci. Lett. 31, 433–453 (1976)

    Google Scholar 

  • Nesbitt, R.W., Sun, S-S.: Geochemistry of Archaean spinifex-textured peridotites and related mafic rocks —the komatiite problem. (In preparation)

  • Nisbet, E.G., Bickle, M.J., Martin, A.: The mafic and ultramafic lavas of the Belingwe greenstone belt. J. Petrol. (in press)

  • O'Nions, R.K., Clarke, D.B.: Comparative trace element geochemistry of Tertiary basalts from Baffin Bay. Earth Planet. Sci. Lett. 15, 436–446 (1972)

    Google Scholar 

  • Onuma, N., Higuchi, H.H., Wakita, H., Nagasawa, H.: Trace element partition between two pyroxenes and the host lava. Earth Planet. Sci. Lett. 5, 47–51 (1968)

    Google Scholar 

  • Purvis, A.C., Nesbitt, R.W., Sun, S-S.: Application of Sc in the study of Archaean spinifex-textured peridotites, basalts and associated late differentiates. (In preparation)

  • Pyke, D.R., Naldrett, A.J., Eckstrand, O.R.: Archean ultramafic flows in Munro Township, Ontario. Geol. Soc. Am. Bull. 84, 955–978 (1973)

    Google Scholar 

  • Ross, J.R., Hopkins, G.M.F.: Kambalda Nickel sulfide deposits. In: Economic geology of Australia and Papua New Guinea, Monogr. C.L. Knight, ed., 5, 101–121. Australian Inst. Min. Metall. 1975

  • Schilling, J-G.: Sea-floor evolution: rare earth evidence. Phil. Trans. Roy. Soc. London, Ser. A. 268, 663–706 (1971)

    Google Scholar 

  • Schilling, J-G.: Azores mantle blob: Rare-earth evidence. Earth Planet. Sci. Lett. 25, 103–115 (1975a)

    Google Scholar 

  • Schilling, J-G.: Rare earth variations across ‘normal sections’ of the Reykjanes Ridge, 60 ° −53 °N, mid-Atlantic Ridge, 29 °S, and East Pacific Rise, 2 ° −19 °S, and evidence on the composition of the underlying low-velocity layer. J. Geophys. Res. 80, 1459–1473 (1975b)

    Google Scholar 

  • Schnetzler, C.C., Philpotts, J.A.: Partition coefficients of rare earth elements between igneous matrix material and rock forming mineral phenocrysts. -II. Geochim. Cosmochim. Acta 34, 331–340 (1970)

    Google Scholar 

  • Shaw, D.M.: Trace element fractionation during anatexis. Geochim. Cosmochim. Acta 34, 237–243 (1970)

    Google Scholar 

  • Shih, C. Y.: The rare earth geochemistry of oceanic igneous rocks. Unpubl. Ph. D. thesis. Columbia University (1972)

  • Shih, C.Y., Sun, S.S., Liou, J.G., Yen, T.P., Rhodes, J.M., Hsu, I.C.: Petrology and geochemistry of the Coastal Range ophiolites of Taiwan. EOS 53, 535 (1972)

    Google Scholar 

  • Shimizu, N., Kushiro, I.: The partitioning of rare earth elements between garnet and liquid at high pressures: preliminary experiments. Geophys. Res. Lett. 2, 413–416 (1975)

    Google Scholar 

  • Sun, C-O., Williams, R.J., Sun, S-S.: Distribution coefficients of Eu and Sr for plagioclase/liquid and clinopyroxene/liquid equilibria in ocean ridge basalt, an experimental study. Geochim. Cosmochim. Acta 38, 1415–1433 (1974)

    Google Scholar 

  • Sun, S-S., Hanson, G.N.: Origin of Ross Island basanitoids and limitations upon the heterogeneity of mantle sources for alkali basalts and nephelinites. Contrib. Mineral. Petrol. 52, 77–106 (1975)

    Google Scholar 

  • Sun, S-S., Nesbitt, R.W.: Chemical heterogeneity of the Archaean mantle, composition of the earth and mantle evolution. Earth Planet. Sci. Lett. 35, 429–448 (1977)

    Google Scholar 

  • Tarney, J., Dalziel, I.W.E., de Wit, M.J.: Marginal basin “Rocas Verdes” complex from S. Chile: a model for Archaean greenstone belt formation. In: The early history of the earth (B.F. Windley, ed.), pp. 131–146. London: John Wiley and Sons 1976

    Google Scholar 

  • Viljoen, M.J., Viljoen, R.P.: The geology and geochemistry of the Lower Ultramafic unit of the Onverwacht Group and a proposed new class of igneous rocks. Spec. publ. Geol. Soc. S. Africa, No. 2, 55–86 (1969a)

    Google Scholar 

  • Viljoen, M.J., Viljoen, R.P.: The geological and geochemical significance of the upper formations of the Onverwacht Group. Spec. publ. Geol. Soc. S. Africa, No. 2, 113–152 (1969b)

    Google Scholar 

  • Viljoen, R.P., Viljoen, M.J.: Evidence for the composition of the primitive mantle and its products of partial melting from a study of the rocks of the Barberton Mountain Land. Spec. publ. Geol. Soc. S. Africa No. 2, 275–295 (1969c)

    Google Scholar 

  • Williams, D.A.C.: Archaean ultramafic, mafic and associated rocks, Mt. Monger, Western Australia. J. Geol. Soc. Australia 19, 163–188 (1972)

    Google Scholar 

  • Windley, B.F., Smith, J.V.: Archaean high grade complexes and modern continental margins. Nature 260, 671–674 (1976)

    Google Scholar 

  • Wood, D.A., Gibson, I.L., Thompson, R.N.: Elemental mobility during zeolite facies metamorphism of the Tertiary basalts of eastern Iceland. Contrib. Mineral. Petrol. 55, 241–254 (1976)

    Google Scholar 

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  1. Department of Geology and Mineralogy, The University of Adelaide, Box 498, G.P.O., 5001, Adelaide, South Australia, Australia

    Shen -Su Sun & Robert W. Nesbitt

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  1. Shen -Su Sun
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Sun, S.S., Nesbitt, R.W. Petrogenesis of Archaean ultrabasic and basic volcanics: Evidence from rare earth elements. Contrib. Mineral. and Petrol. 65, 301–325 (1978). https://doi.org/10.1007/BF00375516

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