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Geochemistry of late Caledonian minettes from Northern Britain: implications for the Caledonian sub-continental lithospheric mantle

Published online by Cambridge University Press:  05 July 2018

Jason C. Canning ,
P. J. Henney ,
M. A. Morrison  and
J. W. Gaskarth
Jason C. Canning
Affiliation:
School of Earth Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
P. J. Henney
Affiliation:
British Geological Survey, Keyworth, Nottingham, NG12 5GG, UK
M. A. Morrison
Affiliation:
School of Earth Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
J. W. Gaskarth
Affiliation:
School of Earth Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
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Abstract

The geochemistry of late Caledonian minettes from across the orogenic belt is compared in order to constrain the composition of the Caledonian sub-continental lithospheric mantle (SCLM). All the minettes are similar petrographically and chemically and several samples have characteristics typical of near primary mantle melts. Samples from the Northern Highlands and the Caledonian foreland show enrichment in many trace elements (notably LILE and LREE) relative to those from the Grampians, the Southern Uplands and northern England, coupled with distinct Nd and Sr isotope characteristics. Processes such as fractional crystallization, crustal assimilation, and partial melting played a negligible role in creating the differences between the two groups which reflect long-term, time-integrated differences in the compositions of their SCLM sources. The Great Glen Fault appears to represent the boundary between these two lithospheric mantle domains. Other currently exposed Caledonian tectonic dislocations cannot be correlated directly with compositional changes within the SCLM. The chemical provinciality displayed by the minettes shows some resemblance to that within other late Caledonian igneous suites, including the newer granites, suggesting that the minettes may represent the lithospheric mantle contributions to these rocks.

Keywords

Caledoniancontinental lithospheric mantleminettenewer granitesGreat Glen fault
Type
The 1995 Hallimond Lecture
Information
Mineralogical Magazine , Volume 60 , Issue 398 , February 1996 , pp. 221 - 236
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1996

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References

Bachinski, S.W. and Simpson, E.L. (1984) Ti-phlogo- pites of the Shaws cove minette: a comparison with micas from other lamprophyres, potassic rocks, kimberlites and mantle xenoliths. Amer. Mineral., 69, 41–56.Google Scholar
Barnes, R.P., Rock, N.M.S. and Gaskarth, J.W. (1986) Late Caledonian dyke swarms of southern Scotland; new field, petrologic and geochemical data for the Wigtown peninsula, Galloway. Geol. J., 21, 101-25.CrossRefGoogle Scholar
Bluck, B.J. (1985) The Scottish paratectonic Caledonides. Scon. J. 21 437—64.Google Scholar
Clayburn, J.A.P. (1988) The crustal evolution of central Scotland and the nature of the lower crust: Pb, Nd and Sr evidence from Caledonian granites. Earth Planet. Sci. Lett., 90, 41–51.CrossRefGoogle Scholar
Esang, C.B. and Piper, J.D.A. (1984) Palaeomagnetism of Caledonian intrusive suites in the Northern Highlands of Scotland: constraints to tectonic movements within the Caledonian orogenic belt. Tectonophysics, 104, 1–34.CrossRefGoogle Scholar
Esperança, S. and Holloway, J.R. (1987) On the origin of some mica-lamprophyres: experimental evidence from a mafic minette. Contrib. Mineral. Petrol., 95, 207–16.CrossRefGoogle Scholar
Fowler, M.B. (1988) Elemental evidence for crustal contamination of mantle-derived Caledonian syenite by metasediment anatexis and magma mixing. Chem. Geol., 69, 1 — 16.CrossRefGoogle Scholar
Freeman, B., Klemperer, S.L. and Hobbs, R.W. (1988) The deep structure of northern England and the Iapetus Suture zone from BIRPS deep seismic reflection profiles. J. Geol. Soc. Lond., 145, 727–40.CrossRefGoogle Scholar
Frost, C.D. and O'Nions, R.K. (1985) Caledonian magma genesis and crustal recycling. J. Petrol. 26, 515—44.CrossRefGoogle Scholar
Gibson, S.A., Thompson, R.N., Leat, P.T., Morrison, M.A., Hendry, G.L., Dickin, A.P. and Mitchell, J.G. (1992) Asthenosphere-derived magmatism in the Rio Grande rift, western USA: implications for continental break-up. In Magmatism and the causes of continental break up( Storey, B.C., Alabaster, T. and Pankhurst, R.J., eds.), Geol. Soc. Spec. Pub., 68, 61–89.Google Scholar
Gibson, S.A., Thompson, R.N., Leat, P.T., Morrison, M.A., Hendry, G.L., Dickin, A.P. and Mitchell, J.G. (1993) Ultrapotassic magmas along the flanks of the Oligo-Miocene Rio Grande Rift, USA: monitors of the zone of lithospheric mantle extension and thinning beneath a continental rift. J. Petrol., 34, 187–228.CrossRefGoogle Scholar
Gibson, S.A., Thompson, R.N., Leonardos, O.H., Dickin, A.P. and Mitchell, J.G, (1995) The late Cretaceous impact of the Trinidade mantle plume: evidence from large-volume, mafic, potassic magmatism in SE Brazil. J. Petrol., 36, 189–229.CrossRefGoogle Scholar
Halliday, A.N. (1984) Coupled Sm-Nd and U-Pb systematics in late Caledonian granites and basement under northern Britain. Nature, 307, 229–33.CrossRefGoogle Scholar
Halliday, A.N., Stephen, W.E., Hunter, R.H., Menzies, M.A., Dickin, A.P. and Hamilton, P.J. (1985) Isotopic and chemical constraints on the building of the deep Scottish lithosphere. Scott. J. Geol., 21, 456–91.CrossRefGoogle Scholar
Henney, P.J. (1991) The geochemistry and petrogenesis of the minor intrusive suite associated with the late Caledonian Cr iff ell-Dalbeattie pluton, S. W. Scotland. Ph.D thesis (unpubl.), University of Aston in Birmingham, 301 pp.Google Scholar
Hutton, D.H. (1987) Strike-slip terranes and a model for the evolution of the British and Irish Caledonides. Geol. Mag., 124, 405–25.CrossRefGoogle Scholar
Hutton, D.H. (1988) Igneous emplacement in a shear zone termination: the biotite granite at Strontian, Scotland. Geol. Soc. Amer. Bull., 100, 1392–9.2.3.CO;2>CrossRefGoogle Scholar
Klemperer, S.L. and Hobbs, R.W. (1992) The BIRPS Atlas: deep seismic reflection profiles around the British Isles. Cambridge University Press, 128 pp.+100 seismic sections.Google Scholar
Klemperer, S.L. and Peddy, C. (1992) Seismic reflection profiling and the structure of the continental lithosphere. In Understanding the Earth (Brown, G.C., Hawkesworth, C.J. and Wilson, R.C.L., eds.) Cambridge University Press, 249—74.Google Scholar
Luhr, J.F., Allan, J.F., Carmichael, I.S.E., Nelson, S.A. and Hasenaka, T. (1989) Primitive calc-alkaline and alkaline rock types from the Western Mexican Volcanic Belt. J. Geophys. Res., 94, 4515–30.CrossRefGoogle Scholar
Macdonald, R., Thorpe, R.S., Gaskarth, J.W. and Grindrod, A.R. (1985) Multi-component origin of Caledonian lamprophyres of Northern England. Mineral. Mag., 49, 485–94.CrossRefGoogle Scholar
Macdonald, R., Rock, N.M.S., Rundle, C.C. and Russell, O. J. (1986) Relationships between late Caledonian lamprophyric, syenitic and granitic rtiagmas in a differentiated dyke, southern Scotland. Mineral Mag., 50, 547–57.CrossRefGoogle Scholar
McKenzie, D.P. (1989) Some remarks on the movement of small melt fractions in the mantle. Earth. Planet. Sci. Lett., 95, 53–72.CrossRefGoogle Scholar
McKenzie, D.P. and O'Nions, R.K. (1991) Partial melt distributions from inversion of rare earth element concentrations. J. Petrol., 32, 1021–91.CrossRefGoogle Scholar
Morrison, M.A., Hendry, G.L. and Leat, P.T. (1987) Regional and tectonic implications of parallel Caledonian and Permo-Carboniferous lamprophyre dyke swarms from Lismore, Ardgour. Trans. Roy. Soc. Edin., Earth Sciences, 77, 279–88.CrossRefGoogle Scholar
Nakamura, N. (1974) Determination of REE, Ba, Fe, Mg, Na, and K in carbonaceous and ordinary chondrites. Geochim. Cosmochim. Acta., 38, 757–75.CrossRefGoogle Scholar
Powell, D., Anderson, T.B., Drake, A.A.Jr., Hall, L. and Keppie, J.D. (1988) The age and distribution of basement rocks in the Caledonide orogen of the N. Atlantic. In The Caledonian-Appalachian orogen. (Harris, A.L. and Fettes, D.J., eds.) Geol. Soc. Spec. Publ., 38, 63-74.Google Scholar
Rock, N.M.S. (1984) Nature and origin of calc-alkaline lamprophyres: minettes, vogesites, kersantites and spessartites. Trans. Roy. Soc. Edin., Earth Sciences, 74, 193–227.CrossRefGoogle Scholar
Rock, N.M.S. (1991) Lamprophyres. Blackie, Glasgow. 285 pp.Google Scholar
Rock, N.M.S. and Rundle, C.C. (1986) Lower Old Red Sandstone age for the ‘Great (Basal) Conglomerate of the Scottish Borders. Scott. J. Geol., 22, 285—8.Google Scholar
Rock, N.M.S. and Hunter, R.H. (1987) Late Caledonian dyke swarms of northern Britain: spatial and temporal intimacy between lamprophyric and granitic magmatism around the Ross of Mull pluton, Inner Hebrides. Geol. Rundsch., 76, 805–26.CrossRefGoogle Scholar
Rock, N.M.S., Cooper, C. and Gaskarth, J.W. (1986a) Late Caledonian subvolcanic vents and associated dykes in the Kirkcudbright area, Galloway, southwest Scotland. Proc. Yorks. Geol Soc., 46, 29–37.CrossRefGoogle Scholar
Rock, N.M.S., Gaskarth, J.W. and Rundle, C.C. (1986^) Late Caledonian dyke-swarms in Southern Scotland: a regional zone of primitive K-rich lamprophyres and associated vents. J. Geol., 94, 505–22.CrossRefGoogle Scholar
Rock, N.M.S., Gaskarth, J.W., Henney, P.J. and Shand, P. (1988) Late Caledonian dyke swarms of northern Britain: some preliminary petrogenetic and tectonic implications of their province-wide distribution and chemical variation. Can. Miner., 26, 3–22.Google Scholar
Rogers, D.A., Marshall J.E.A. and Astin, T.R. (1989) Devonian and later movements on the Great Glen fault system, Scotland. J. Geol. Soc. Lond., 146, 369–72.CrossRefGoogle Scholar
Rogers, G. and Dunning, G.R. (1991) Geochronology of appinitic and related granitic magmatism in the W. Highlands of Scotland: constraints on the timing of transcurrent fault movement. J. Geol. Soc. Lond., 148, 17–27.CrossRefGoogle Scholar
Shand, P. (1989) Late Caledonian magmagenesis in southern Scotland. Ph.D thesis, (unpubl.), University of Aston in Birmingham, 225 pp.Google Scholar
Shand, P., Gaskarth, J.W., Thirlwall, M.F. and Rock, N.M.S. (1994) Late Caledonian lamprophyre dyke swarms of South-Eastern Scotland. Mineral Petrol., 51, 277–98.CrossRefGoogle Scholar
Sheppard, S. and Taylor, W.R. (1992) Barium- and LREE-nch olivine-mica-lamprophyres with affinities to lamproites, Mt. Bundey, Northern Territory, Australia. Lithos, 28, 303–25.Google Scholar
Stephens, W.E. and Halliday, A.N. (1984) Geochemical contrasts between late Caledonian granitoid plutons of northern, central and southern Scotland. Trans. Roy. Soc. Edinb., Earth Sci., IS, 259—73.Google Scholar
Thirlwall, M.F. (1981) Implications for Caledonian plate tectonic models of chemical data from volcanic rocks of the British Old Red Sandstone. J. Geol. Soc. Lond., 138, 123–38.CrossRefGoogle Scholar
Thirlwall, M.F. (1982) Systematic variation in chemistry and Nd-Sr isotopes across a Caledonian calc-alkaline volcanic arc: implications for source materials. Earth. Planet. Sci. Lett., 58, 27–50.CrossRefGoogle Scholar
Thirlwall, M.F. (1986) Lead isotope evidence for the nature of the mantle beneath Caledonian Scotland. Earth. Planet. Sci. Lett., 80, 55–70.CrossRefGoogle Scholar
Thirlwall, M.F. (1988) Geochronology of late Caledonian magmatism in northern Britain. J. Geol. Soc. Lond., 145, 951–67.CrossRefGoogle Scholar
Thirlwall, M.F. (1989) Movement on proposed terrane boundaries in northern Britain: constraints from Ordovician-Devonian igneous rocks. J. Geol Soc. Loud., 146, 373–6.CrossRefGoogle Scholar
Thompson, R.N. and Fowler, M.B. (1986) Subduction- related shoshonitic and ultra-potassic magmatism: a study of Siluro-Ordovician syenites from the Scottish Caledonides. Contrib. Mineral. Petrol., 94, 507–22.CrossRefGoogle Scholar
Thompson, R.N. and Gibson, S.A. (1994) Magmatic expression of thinning across continental rifts. Tectonophysics, 223, 41–68.CrossRefGoogle Scholar
Thompson, R.N., Morrison, M.A., Hendry, G.L. and Parry, S.J. (1984) An assessment of the relative roles of crust and mantle in magma genesis: an elemental approach. Phil. Trans. Roy. Soc. Lond. A310, 549–90.Google Scholar
Thompson, R.N., Morrison, M.A., Dickin, A.P., Gibson, I. L. and Harmon, R.S. (1986) Two contrasting styles of interaction between basic magmas and continental crust in the British Tertiary Volcanic Province. J. Geophys. Res., 91, 5985–97.CrossRefGoogle Scholar
Thompson, R.N., Leat, P.T., Dickin, A.P., Morrison, M.A., Hendry, G .and Gibson, S.A. (1989) Strongly potassic mafic magmas from lithospheric mantle sources during continental extension and heating: evidence from Miocene minettes of northwest Colorado, USA. Earth. Planet. Sci. Lett., 98, 139–53.CrossRefGoogle Scholar
Thompson, R.N., Gibson, S.A., Leat, P.T., Mitchell, J. G., Morrison, M.A., Hendry, G.L. and Dickin, A.P. (1993) Early Miocene continental extension-related basaltic magmatism at Walton Peak, northwest Colorado: further evidence on continental basalt genesis. J. Geol. Soc. Lond., 150, 277–92.CrossRefGoogle Scholar
van Breeman, O. and Hawkesworth, C.J. (1980) Sm-Nd isotope study of garnet and their metamorphic host rocks. Trans. Roy. Soc. Edinb., Earth Sci., 71, 97–102.CrossRefGoogle Scholar
van Der Voo, R. and Scotese, C.R. (1981) Palaeomagnetic evidence for a large (∼2000 km) sinistral offset along the Great Glen fault during Carboniferous times. Geology, 9, 583–9.2.0.CO;2>CrossRefGoogle Scholar
Walsh, J.N., Buckley, F. and Barker, J. (1981) The simultaneous determination of the rare-earth elements in rocks using inductively coupled plasma source spectrometry. Chem. Geol., 33, 141–53.CrossRefGoogle Scholar
Watson, J.V. (1984) The ending of the Caledonian orogeny in Scotland. J. Geol. Soc. Lond., 141 193-214.Google Scholar
Weaver, B.W. and Tarney, J. (1980) Rare earth geochemistry of Lewisian granulite-facies gneisses, northwest Scotland: implications for the petrogenesis of the Archaean lower continental crust. Earth Planet. Sci. Lett., 51, 279–96.CrossRefGoogle Scholar
Weaver, B.W. and Tarney, J. (1981) Lewisian gneiss geochemistry and Archaean crustal development models. Earth Planet. Sci. Lett., 55, 171–80.CrossRefGoogle Scholar