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The genesis of the Archaean Welcome Well volcanic complex, Western Australia

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Abstract

The Welcome Well volcanic complex east of Leonora, Western Australia, is interpreted to be the eroded remnant of an Archaean stratovolcano. Andesitic flows and intercalated mudflow deposits comprising the volcanic centre give way to coarse, poorly-sorted lithic wackes that were deposited in alluvial fans skirting the lower slopes or base of the subaerial volcanic edifice. These deposits are succeeded both laterally and vertically by fine-grained, subaqueous, turbiditic sediments that are intercalated with pillowed, tholeiitic basalts.

There is a complete petrographic and geochemical gradation from porphyritic basalt through porphyritic andesite to porphyritic dacite. In general, the rocks show calc-alkaline patterns of elemental behaviour, consistent with fractionation of variable proportions of the modal minerals amphibole, plagioclase, clinopyroxene and Ti-magnetite. Among these minerals, amphibole appears to have assumed a major role in producing the geochemical characteristics of the high-Si andesites and dacites as evidenced by the behaviour of Zr, Nb, Y and REE. In order to account for the geochemical variability of the basalts and low-Si andesites, it is proposed that they differentiated from primitive basic parents which had a range of major and LIL element contents. The most plausible origin for the primary magmas involves shallow, hydrous melting of a LIL element-enriched mantle source over a significant pressure range.

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References

  • Anderson AT, Gottfried D (1971) Contrasting behavior of P, Ti, and Nb in a differentiated high-alumina olivine tholeiite and a calcalkaline andesite suite. Bull Geol Soc Am 82:1929–1942

    Google Scholar 

  • Arth JG (1976) Behavior of trace elements during magmatic processes-a summary of theoretical models and their applications. J Res USGS 4:41–47

    Google Scholar 

  • Barley ME (1981) Relations between volcanic rocks in the Warrawoona Group: continuous or cyclic evolution? Geol Soc Australia Spec Publ 7:263–293

    Google Scholar 

  • Binns RA, Gunthorpe RJ, Groves DI (1976) Metamorphic patterns and development of greenstone belts in the eastern Yilgarn Block, Western Australia. In: Windley BF (ed) The early history of the earth. John Wiley, London, pp 303–313

    Google Scholar 

  • Carmichael ISE (1964) The petrology of Thingmuli, a Tertiary volcano in eastern Iceland. J Petrol 5:435–460

    Google Scholar 

  • Cawthorn RG, Curran EB, Arculus RJ (1973) A petrogenetic model for the origin of the calc-alkaline suite of Grenada, Lesser Antilles. J Petrol 14:327–337

    Google Scholar 

  • Condie KC (1976) Trace-element geochemistry of Archean greenstone belts. Earth Sci Rev 12:393–417

    Google Scholar 

  • Condie KC, Harrison NM (1976) Geochemistry of the Archaean Bulawayan Group, Midlands greenstone belt, Rhodesia. Precambrian Res 3:253–271

    Google Scholar 

  • Ewart A (1976) Mineralogy and chemistry of modern orogenic lavas — Some statistics and implications. Earth Planet Sci Lett 31:417–432

    Google Scholar 

  • Fiske RS, Hopson CA, Waters AC (1963) Geology of Mt. Rainier National Park, Washington. US Geol Surv Prof Pap 444:93 pp

  • Frey FA, Green DH, Roy SD (1978) Integrated models of basalt petrogenesis: a study of quartz tholeiites to olivine melilitites from southeastern Australia utilizing geochemical and experimental petrological data. J Petrol 19:463–513

    Google Scholar 

  • Fryer BJ, Jenner GA (1978) Geochemistry and origin of the Archean Prince Albert Group volcanics, western Melville Peninsula, North-west Territories, Canada. Geochim Cosmochim Acta 42:1645–1654

    Google Scholar 

  • Gee RD, Baxter, JL, Wilde SA, Williams IR (1981) Crustal development in the Archaean Yilgarn Block, Western Australia. Geol Soc Australia Spec Publ 7:43–56

    Google Scholar 

  • Giles CW (1980) A comparative study of Archaean and Proterozoic felsic volcanic associations in southern Australia. PhD thesis, Univ Adelaide (unpubl), 220 pp

  • Giles CW (1981) Archaean calc-alkaline volcanism in the Eastern Goldfields Province, Western Australia. Geol Soc Australia Spec Publ 7:275–286

    Google Scholar 

  • Gill JB (1978) Role of trace element partition coefficients in models of andesite genesis. Geochim Cosmochim Acta 42:709–724

    Google Scholar 

  • Goodwin AM (1974) Precambrian belts, plumes and shield development. Am J Sci 274:987–1028

    Google Scholar 

  • Goodwin AM, Smith IEM (1980) Chemical discontinuities in Archean metavolcanic terrains and the development of Archean crust. Precambrian Res 10:301–311

    Google Scholar 

  • Green DH (1971) Compositions of basaltic magmas as indicators of conditions of origin: application to oceanic volcanism. Philos Trans R Soc London, Ser A 268:707–725

    Google Scholar 

  • Green DH (1973) Experimental melting studies on a model upper mantle composition at high pressure under water-saturated and water-undersaturated conditions. Earth Planet Sci Lett 19:37–53

    Google Scholar 

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

    Google Scholar 

  • Green DH (1976) Experimental testing of “equilibrium” partial melting of peridotite under water-saturated, high-pressure conditions. Can Miner 14:255–268

    Google Scholar 

  • Green DH, Liebermann RC (1976) Phase equilibria and elastic properties of a pyrolite model for the oceanic upper mantle. Tectonophysics 32:61–92

    Google Scholar 

  • Green TH (1981) Experimental evidence for the role of accessory phases in magma genesis. J Volcanol Geotherm Res 10:405–422

    Google Scholar 

  • Green TH, Ringwood AE (1968) Genesis of the calc-alkaline igneous rock suite. Contrib Mineral Petrol 18:105–162

    Google Scholar 

  • Hallberg JA (1980) Archaean geology of the Leonora-Laverton area. International Archaean Symposium, Perth, 1980 Northeast Yilgarn Block Excusion Guide, 37 pp

  • Hallberg JA, Williams DAC (1972) Archaean mafic and ultramafic rock associations in the Eastern Goldfields region, Western Australia. Earth Planet Sci Lett 15:191–200

    Google Scholar 

  • Hallberg JA, Johnston C, Bye SM (1976a) The Archaean Marda igneous complex, Western Australia. Precambrian Res 3:111–136

    Google Scholar 

  • Hallberg JA, Carter DN, West KN (1976b) Archaean volcanism and sedimentation near Meekatharra, Western Australia. Precambrian Res 3:577–595

    Google Scholar 

  • Hallberg JA, Giles CW (in prep) Archaean felsic volcanism in the Leonora-Laverton district, Yilgarn Block, Western Australia

  • Hawkesworth CJ, O'Nions RK (1977) The petrogenesis of some rocks from southern Africa. J Petrol 18:487–520

    Google Scholar 

  • Irvine TN, Baragar WRA (1971) A guide to the chemical classification of the common volcanic rocks. Can J Earth Sci 8:523–548

    Google Scholar 

  • Lambert IB, Wyllie PJ (1968) Stability of hornblende and nature of the low velocity zone. Nature 219:1240–1241

    Google Scholar 

  • Lambert RS, Holland JG, Owen PF (1974) Chemical petrology of a suite of calc-alkaline lavas from Mt. Ararat, Turkey. J Geol 82:419–438

    Google Scholar 

  • Lopez-Escobar L, Frey FA, Vergara M (1977) Andesites and high-alumina basalts from the central-south Chile High Andes; geo-chemical evidence bearing on their petrogenesis. Contrib Mineral Petrol 63:199–228

    Google Scholar 

  • Macdonald GA (1972) “Volcanoes” Prentice Hall, New Jersey 510 pp

    Google Scholar 

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

    Google Scholar 

  • Pearce JA, Norry MJ (1979) Petrogenetic implications of Ti, Zr, Y and Nb variations in volcanic rocks. Contrib Mineral Petrol 69:33–47

    Google Scholar 

  • Ringwood AE (1966) The chemical composition and origin of the earth. In: Hurley PM (ed) Advances in Earth Science M.I.T. Press, Cambridge, Mass, pp 287–356

    Google Scholar 

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

    Google Scholar 

  • Sun SS, Nesbitt RW (1978) Petrogenesis of Archaean ultrabasic and basic volcanics: evidence from rare earth elements. Contrib Mineral Petrol 65:301–325

    Google Scholar 

  • Taylor SR (1969) Trace element chemistry of andesites and associated calc-alkaline rocks. In McBirney AR (ed) “Proceedings of the an-desite conference”. Bull Oregon Dept Mineral Ind 65:43–63

  • Taylor SR, Hallberg JA (1977) Rare earth elements in the Marda calc-alkaline suite: an Archean geochemical analogue of Andean-type volcanism. Geochim Cosmochim Acta 41:1125–1129

    Google Scholar 

  • Thorpe RS, Potts PJ, Francis PW (1976) Rare earth data and petrogenesis of andesite from the north Chilean Andes. Contrib Mineral Petrol 54:65–78

    Google Scholar 

  • Wilson HDB, Morrice MG (1977) The volcanic sequence in Archaean shields. Geol Assoc Canada, Spec Pap 16:355–376

    Google Scholar 

  • Wyllie PJ (1971) Role of water in magma generation and initiation of diapiric uprise in the mantle. J Geophys Res 76:1328–1338

    Google Scholar 

Download references

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Authors and Affiliations

  1. Department of Geology, The University of Adelaide, 5000, Adelaide, South Australia

    C. W. Giles

  2. Division of Mineralogy, CSIRO, Private Bag, P.O., 6014, Wembley, Western Australia

    J. A. Hallberg

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  1. C. W. Giles
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  2. J. A. Hallberg
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Giles, C.W., Hallberg, J.A. The genesis of the Archaean Welcome Well volcanic complex, Western Australia. Contr. Mineral. and Petrol. 80, 307–318 (1982). https://doi.org/10.1007/BF00378003

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  • DOI: https://doi.org/10.1007/BF00378003

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