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Origin of infracrustal (I-type) granite magmas

Published online by Cambridge University Press:  03 November 2011

B. W. Chappell  and
W. E. Stephens
B. W. Chappell
Affiliation:
Department of Geology, The Australian National University, GPO Box 4, Canberra, ACT 2601, Australia.
W. E. Stephens
Affiliation:
Department of Geology, The University of St Andrews, Purdie Building, St Andrews, Fife KY16 9ST, Scotland, U.K.
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Abstract

I-type granites are produced by partial melting of older igneous rocks that are metaluminous and hence have not undergone any significant amount of chemical weathering. In the Lachlan Fold Belt of southeastern Australia and the Caledonian Fold Belt of Britain and Ireland there was a major magmatic event close to 400 Ma ago involving a massive introduction of heat into the crust. In both areas, that Caledonian-age event produced large volumes of I-type granite and related volcanic rocks. Granites of these two areas are not identical in character but they do show many similarities and are markedly different from many of the granites found in Mesozoic and younger fold belts. These younger, dominantly tonalitic, granites have compositions similar to those of the more felsic volcanic rocks forming at the present time above subduction zones. The Palaeozoic granites show little evidence of such a direct relationship to subduction. Within both the Caledonian and Lachlan belts there are some granites with a composition close to the younger tonalites. A particularly interesting case is that of the Tuross Head Tonalite of the Lachlan Fold Belt, which can be shown to have formed from slightly older source rocks by a process that we refer to as remagmatisation which has caused no significant change in composition. Since remagmatisation has reproduced the former source composition in the younger rocks, the wrong inference would result from the use of that composition to deduce the tectonic conditions at the time of formation of the tonalite. Granites, particularly the more mafic ones, will generally have compositions reflecting the compositions of their source rocks, and attempts to use granite compositions to reconstruct the tectonic environment at the time of formation of the granite may be looking instead at an older event. This is probably also the case for some andesites formed at continental margins.

Several arguments can be presented in favour of a general model for the production of I-type granite sources by underplating the crust, so that the source rocks are infracrustal. Such sources may contain a component of subducted sediments with the consequence that some of the compositional characteristics of sedimentary rocks may be present in I-type source rocks and in the granites derived from them. The small bodies of mafic granite and gabbro associated with island arc volcanism have an origin that can be related to the partial melting of subducted oceanic crust or of mantle material overlying such slabs and can be referred to as M-type. These rocks have compositions indistinguishable from those of the related volcanic rocks, except for a small component of cumulative material. The tonalitic I-type granites characteristic of the Cordillera are probably derived from such M-type rocks of basaltic to andesitic composition, which had been underplated beneath the crust. Some of the more mafic tonalites of the Caledonian-age fold belts may also have had a similar origin. More commonly, however, the plutonic rocks of the older belts are granodioritic and these probably represent the products of partial melting of older tonalitic I-type source rocks in the deep crust, these having compositions and origins analogous to the tonalites of the Cordillera. In this way, multiple episodes of partial melting, accompanied by fractionation of the magmas, can produce quite felsic rocks from original source rocks in the mantle or mantle wedge. These are essential processes in the evolution of the crust, since the first stages in this process produce new crust and the later magmatic events redistribute this material vertically without the addition of significant amounts of new crust.

Keywords

Caledoniancrustal meltingLachlanremagmatisationsource rocksunderplating
Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 79 , Issue 2-3: The Origin of Granites , 1988 , pp. 71 - 86
Copyright
Copyright © Royal Society of Edinburgh 1988

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References

Bateman, P. C. 1983. A summary of critical relations in the central part of the Sierra Nevada batholith, California, U.S.A. In Roddick, J. A. (ed.) Circum-Pacific Plutonic Terranes. MEM GEOL SOC AM 159, 241–254.Google Scholar
Borg, S. G., Stump, E., Chappell, B. W., McCulloch, M. T., Wyborn, D., Armstrong, R. L. & Holloway, J. R. 1987. Granitoids of northern Victoria Land, Antarctica: implications of chemical and isotopic variations to regional crustal structure and tectonics. AM J SCI 287, 127–169.Google Scholar
Brown, G. C., Francis, E. H., Kennan, P. & Stillman, C. J. 1985. Caledonian igneous rocks of Britain and Ireland. In Harris, A. L. (ed.) The nature and timing of Orogenic activity in the Caledonian rocks of the British Isles. MEM GEOL SOC LONDON 9, 1–15.Google Scholar
Brown, P. E. 1983. Caledonian and earlier Magmatism. In Craig, G. Y. (ed.) Geology of Scotland, 167–204. Edinburgh: Scottish Academic Press.Google Scholar
Cas, R. A. F. & Wright, J. V. 1987. Volcanic successions modern and ancient. London: Allen & Unwin.Google Scholar
Chappell, B. W. 1978. Granitoids from the Moonbi district, New England Batholith, eastern Australia. J GEOL SOC AUST 25, 267–283.Google Scholar
Chappell, B. W. 1979. Granites as images of their source rocks. GEOL SOC AM PROG ABSTR 11, 400.Google Scholar
Chappell, B. W. 1984. Source rocks of I- and S-type granites in the Lachlan Fold Belt, southeastern Australia. PHILOS TRANS R SOC LONDON A310, 693–707.Google Scholar
Chappell, B. W., White, A. J. R. & Wyborn, D. 1987. The importance of residual source material (restite) in granite petrogenesis. J PETROL 28, 1111–1138.CrossRefGoogle Scholar
Chappell, B. W., White, A. J. R. & Hine, R. 1988a. Granite provinces and basement terranes in the Lachlan Fold Belt, southeastern Australia. AUST J EARTH SCI (in press).Google Scholar
Chappell, B. W., Beams, S. D., McCulloch, M. T. & White, A. J. R. 1988b. The Bega Batholith: a petrographically, chemically and isotopically asymmetrical plutonic compex of Devonian age in the Lachlan Fold Belt, southeastern Australia (in prep).Google Scholar
Chappell, B. W. & White, A. J. R. 1974. Two contrasting granite types. PAC GEOL 8, 173–174.Google Scholar
Chappell, B. W. & White, A. J. R. 1984. I- and S-type granites in the Lachlan Fold Belt, southeastern Australia. In Keqin, Xu & Guangchi, Tu (eds) Geology of Granites and Their Metallogenic Relations, 87–101. Beijing: Science Press.Google Scholar
Cobbing, E. J. & Pitcher, W. S. 1972. The Coastal Batholith of central Peru. J GEOL SOC LONDON 128, 421–460.CrossRefGoogle Scholar
Cobbing, E. J. & Pitcher, W. S. 1983. Andean plutonism in Peru and its relationship to volcanism and metallogenesis at a segmented plate edge. MEM GEOL SOC AM 159, 277–291.Google Scholar
Collins, W. J., Beams, S. D., White, A. J. R. & Chappell, B. W. 1982. Nature and origin of A-type granites with particular reference to southeastern Australia. CONTRIB MINERAL PETROL 80, 189–200.Google Scholar
Compston, W. & Chappell, B. W. 1979. Sr-isotope evolution of granitoid source rocks. In McElhinny, M. W. (ed.) The Earth: Its Origin, Structure and Evolution, 377–426. London: Academic Press.Google Scholar
DePaolo, D. J. 1981. A neodymium and strontium isotopic study of the Mesozoic calc-alkaline granitic batholiths of the Sierra Nevada and Peninsular Ranges, California. J GEOPHYS RES 86, 10470–10488.CrossRefGoogle Scholar
Ewart, A. 1979. A review of the mineralogy and chemistry of Tertiary-Recent dacitic, latitic, rhyolitic, and related salic volcanic rocks. In Barker, F. (ed.) Trondhjemites, dacites and related rocks, 13–121. Amsterdam: Elsevier.CrossRefGoogle Scholar
Frost, C. D. & O'Nions, R. K. 1985. Caledonian magma genesis and crustal recycling. J PETROL 26, 515–544.CrossRefGoogle Scholar
Gray, C. M. 1984. An isotopic mixing model for the origin of granitic rocks in southeastern Australia. EARTH PLANET SCI LETT 70, 47–60.CrossRefGoogle Scholar
Griffin, T. J., White, A. J. R. & Chappell, B. W. 1978. The Moruya Batholith and geochemical contrasts between the Moruya and Jindabyne Suites. J GEOL SOC AUST 25, 235–247.Google Scholar
Gromet, L. P. & Silver, L. T. 1987. REE variations across the Peninsular Ranges batholith: implications for batholithic petrogenesis and crustal growth in magmatic arcs. J PETROL 28, 75–125.CrossRefGoogle Scholar
Halliday, A. N., Fallick, A. E., Dickin, A. P., Mackenzie, A. B., Stephens, W. E. & Hildreth, W. 1983. The isotopic and chemical evolution of Mount St Helens. EARTH PLANET SCI LETT 63, 241–256.CrossRefGoogle Scholar
Halliday, A. N., Stephens, W. E., Hunter, R. H., Menzies, M. A., Dickin, A. P. & Hamilton, P. J. 1985. Isotopic and chemical constraints on the building of the deep Scottish lithosphere. SCOTT J GEOL 21, 465–491.Google Scholar
Halliday, A. N. & Stephens, W. E. 1984. Crustal controls on the genesis of the 400 Ma old Caledonian granites. PHYS EARTH PLANET INT 35, 89–104.CrossRefGoogle Scholar
Hamilton, P. J., O'Nions, R. K. & Pankhurst, R. J. 1980. Isotopic evidence for the provenance of some Caledonian granites. NATURE 287, 279–284.CrossRefGoogle Scholar
Harmon, R. S., Halliday, A. N., Clayburn, J. A. P. & Stephens, W. E. 1984. Chemical and isotopic systematics of the Caledonian intrusions of Scotland and Northern England: a guide to magma source region and magma-crust interaction. PHILOS TRANS R SOC LONDON A310, 709–742.Google Scholar
Harris, A. L. (ed.) 1985. The nature and timing of Orogenic activity in the Caledonian rocks of the British Isles. MEM GEOL SOC LONDON 9.Google Scholar
Hensel, H. D., McCulloch, M. T. & Chappell, B. W. 1985. The New England Batholith: constraints on its derivation from Nd and Sr isotopic studies of granitoids and country rocks. GEOCHIM COSMOCHIM ACTA 49, 369–384.Google Scholar
Hine, R., Williams, I. S., Chappell, B. W. & White, A. J. R. 1978. Contrasts between I- and S-type granitoids of the Kosciusko Batholith. J GEOL SOC AUST 25, 219–234.Google Scholar
Huppert, H. E. & Sparks, R. S. J. 1988. The generation of granitic magmas by intrusion of basalt into continental crust. J PETROL (in press).CrossRefGoogle Scholar
Johnson, R. W. 1987. Delayed partial melting of subduction-modified magma sources in western Melanesia: new results from the late Cainozoic. Pacific Rim Congress 87, 211–214. Melbourne: The Australasian Institute of Mining and Metallurgy.Google Scholar
Johnson, R. W. & Chappell, B. W. 1979. Chemical analyses of rocks from the late Cainozoic volcanoes of north-central New Britain and the Witu Islands, Papua New Guinea. REP BMR GEOL GEOPHYS 209.Google Scholar
Kistler, R. W. & Peterman, Z. E. 1973. Variations in Sr, Rb, K, Na and initial Sr87/Sr86 in Mesozoic granitic rocks and intruded wall rocks in central California. BULL GEOL SOC AM 84, 3489–3512.2.0.CO;2>CrossRefGoogle Scholar
Kistler, R. W. & Peterman, Z. E. 1978. Reconstruction of crustal blocks of California on the basis of initial strontium isotopic compositions of Mesozoic granitic rocks. PROF PAP US GEOL SURV 1071.Google Scholar
Larsen, E. S. 1948. Batholith and associated rocks of Corona, Elsinore, and San Luis Rey quadrangles, southern California. MEM GEOL SOC AM 29.Google Scholar
Le, Bas M. J. 1982. The Caledonian granites and diorites of England and Wales. In Sutherland, D. S. (ed.) Igneous rocks of the British Isles, 191–201. New York: Wiley.Google Scholar
McBirney, A. R. & White, C. M. 1982. The Cascade province. In Thorpe, R. S. (ed.) Andesites, 115–135. New York: Wiley.Google Scholar
McCulloch, M. T. & Chappell, B. W. 1982. Nd isotopic characteristics of S- and I-type granites. EARTH PLANET SCI LETT 58, 51–64.Google Scholar
Murray, C. G. 1986. Metallogeny and tectonic development of the Tasman Fold Belt in Queensland. ORE GEOL REV 1, 315–400.CrossRefGoogle Scholar
O'Brien, C., Plant, J. A., Simpson, P. R. & Tarney, J. 1985. The geochemistry, metasomatism and petrogenesis of the granites of the English Lake District. J GEOL SOC LONDON 142, 1139–1157.CrossRefGoogle Scholar
O'Connor, P. J. & Brück, P. M. 1978. Age and origin of the Leinster granite. J EARTH SCI R DUBLIN SOC 1, 105–113.Google Scholar
Oliver, R. L. 1956. The origin of garnets in the Borrowdale Volcanic Series and associated rocks, English Lake District. GEOL MAG 93, 121–139.Google Scholar
O'Neil, J. R. & Chappell, B. W. 1977. Oxygen and hydrogen isotope relations in the Berridale batholith. J GEOL SOC LONDON 133, 559–571.Google Scholar
Pankhurst, R. J. & Sutherland, D. S. 1982. Caledonian granites and diorites of Scotland and Ireland. In Sutherland, D. S. (ed.) Igneous rocks of the British Isles, 149–190. New York: Wiley.Google Scholar
Pearce, J. A., Harris, M. B. W. & Tindle, A. G. 1984. Trace element discrimination diagrams for the tectonic interpretation of granitic rocks. J PETROL 25, 956–983.CrossRefGoogle Scholar
Pidgeon, R. T. & Aftalion, M. 1978. Cogenetic and inherited zircon U-Pb systems in granites of Scotland and England, In Bowes, D. R. & Leake, B. W. (eds) Crustal Evolution in Northwestern Britain and Adjacent Regions. GEOL J SPECIAL ISSUE 10, 183–220.Google Scholar
Pitcher, W. S. 1974. The Mesozoic and Cenozoic batholiths of Peru. PAC GEOL 8, 51–62.Google Scholar
Pitcher, W. S. 1982. Granite type and tectonic environment. In Hsu, K. J. (ed.) Mountain Building Processes, 19–40. London: Academic Press.Google Scholar
Plant, J. A., Brown, G. C., Simpson, P. R. & Smith, R. T. 1980. Signature of metalliferous granites in the Scottish Caledonides. TRANS INST MIN MET 89, B198–210.Google Scholar
Richards, D. N. G. 1980. Palaeozoic granitoids of northeastern Australia. In Henderson, R. A. & Stephenson, P. J. (eds) The Geology and Geophysics of Northeastern Australia, 229–246. Brisbane: Geological Society of Australia, Queensland Division.Google Scholar
Richards, J. R. & Singleton, O. P. 1981. Palaeozoic Victoria, Australia: igneous rocks, ages and their interpretation. J GEOL SOC AUST 28, 395–421.CrossRefGoogle Scholar
Rutherford, M. J., Sigurdsson, H., Carey, S. & Davis, A. 1985. The May 18, 1980, eruption of Mount St. Helens 1. Melt composition and experimental phase equilibria. J GEOPHYS RES 90, 2929–2947.CrossRefGoogle Scholar
Shaw, S. E. & Flood, R. H. 1981. The New England Batholith, eastern Australia: geochemical variations in time and space. J GEOPHYS RES 86, 10530–10544.Google Scholar
Silver, L. T., Taylor, H. P. & Chappell, B. W. 1979. Some petrological, geochemical and geochronological observations of the Peninsular Ranges batholith near the international border of the U.S.A. and Mexico, In Abbott, P. L. & Todd, V. R. (eds), GEOL SOC AM 1979 GUIDEB, 83–110.Google Scholar
Silver, L. T. & Chappell, B. W. 1988. The Peninsular Ranges Batholith: an insight into the evolution of the Cordilleran batholiths of southwestern North America. TRANS R SOC EDINBURGH EARTH SCI 79, 105–121.Google Scholar
Stephens, W. E. 1988. Granitoid plutonism in the Caledonian orogen of Europe. In Harris, A. L. & Fettes, D. J. (eds) The Caledonian-Appalachian Orogen. GEOL SOC LONDON SPEC PUBL 38, 389–404.Google Scholar
Stephens, W. E. & Halliday, A. N. 1984. Geochemical contrasts between late Caledonian granitoid plutons of northern, central and southern Scotland. TRANS R SOC EDINBURGH EARTH SCI 75, 259–273.Google Scholar
Stump, E., White, A. J. R. & Borg, S. G. 1986. Reconstruction of Australia and Antarctica: evidence from granites and recent mapping. EARTH PLANET SCI LETT 79, 348–360.CrossRefGoogle Scholar
Sweetman, T. M. 1987. The geochemistry of the Blackstairs Unit of the Leinster Granite, Ireland. J GEOL SOC LONDON 144, 971–984.CrossRefGoogle Scholar
Taylor, H. P. & Sheppard, S. M. F. 1986. Igneous rocks: I. Processes of isotopic fractionation and isotope systematics. In Valley, J. W., Taylor, H. P. & O'Neil, J. R. (eds) Stable isotopes in high temperature geological processes. MIN SOC AM REV MINERAL 16, 227–271.Google Scholar
Taylor, S. R. & McLennan, S. M. 1985. The continental crust: its composition and evolution. Oxford: Blackwell.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 LONDON 138, 123–138.CrossRefGoogle Scholar
Thirlwall, M. F. 1982. Systematic variation in chemistry and Nd-Sr isotopes across a Caledonian calc-alkalíne volcanic arc:implications for source materials. EARTH PLANET SCI LETT 58, 27–50.CrossRefGoogle Scholar
Thirlwall, M. F. & Fitton, J. G. 1983. Sm-Nd garnet age for the Ordovician Borrowdale Volcanic Group, English Lake District. J GEOL SOC LONDON 140, 511–518.CrossRefGoogle Scholar
Tulloch, A. J. 1983. Granitoid rocks of New Zealand—a brief review. In Roddick, J. A. (ed.) Circum-Pacific Plutonic Terranes. MEM GEOL SOC AM 159, 5–20.Google Scholar
Wall, V. J., Clemens, J. D. & Clarke, D. B. 1987. Models for granitoid evolution and source compositions. J GEOL 95, 731–749.Google Scholar
Whalen, J. B. 1980. Aspects of granites and associated mineralization. Ph.D. Thesis, The Australian National University, Canberra.Google Scholar
Whalen, J. B. 1985. Geochemistry of an island-arc plutonic suite: the Uasilau-Yau Yau Intrusive Complex, New Britain, P.N.G. J PETROL 26, 603–632.CrossRefGoogle Scholar
White, A. J. R., Williams, I. S. & Chappell, B. W. 1976. The Jindabyne thrust and its tectonic, physiographic and petrogenetic significance. J GEOL SOC AUST 23, 105–112.Google Scholar
White, A. J. R., Clemens, J. C., Holloway, J. R., Silver, L. T., Chappell, B. W. & Wall, V. J. 1986. S-type granites and their probable absence in southwestern North America. GEOLOGY 14, 115–118.2.0.CO;2>CrossRefGoogle Scholar
White, A. J. R. & Chappell, B. W. 1977. Ultrametamorphism and granitoid genesis. TECTONOPHYSICS 43, 7–22.Google Scholar
White, A. J. R. & Chappell, B. W. 1983. Granitoid types and their distribution in the Lachlan Fold Belt, southeastern Australia. In Roddick, J. A. (ed.) Circum-Pacific Plutonic Terranes. MEM GEOL SOC AM 159, 21–34.Google Scholar
White, A. J. R. & Chappell, B. W. 1988. Some supracrustal (S-type) granites of the Lachlan Fold Belt. TRANS R SOC EDINBURGH EARTH SCI 79, 169–181.Google Scholar
Williams, I. S., Compston, W., Chappell, B. W. & Shirahase, T. 1975. Rubidium-strontium age determinations on micas from a geologically controlled, composite batholith. J GEOL SOC AUST 22, 497–505.CrossRefGoogle Scholar
Williams, I. S., Chen, Y., Chappell, B. W. & Compston, W. 1988. Dating the sources of Bega Batholith granites by ion microprobe. GEOL SOC AUST ABSTR 21, 424.Google Scholar
Wones, D. R. 1980. A comparison between granitic plutons of New England, U.S.A. and the Sierra Nevada Batholith, California. In Wones, D. R. (ed.) The Caledonides in the USA. DEPT GEOL SCI VIRGINIA POLYTECH INST AND STATE UNIV MEM 2, 123–130.Google Scholar
Wyborn, D., Chappell, B. W. & Johnston, R. M. 1981. Three S-type volcanic suites from the Lachlan Fold Belt, southeast Australia. J GEOPHYS RES 86, 10335–10348.Google Scholar
Wyborn, D., Turner, B. S. & Chappell, B. W. 1987. The Boggy Plain Supersuite: a distinctive belt of I-type igneous rocks of potential economic significance in the Lachlan Fold Belt. AUST J EARTH SCI 34, 21–43.Google Scholar
Wyborn, D. & Chappell, B. W. 1986. The petrogenetic significance of chemically related plutonic and volcanic rock units. GEOL MAG 123, 619–628.Google Scholar
Wyborn, L. A. I., Page, R. W. & Parker, A. J. 1987. Geochemical and geochronological signatures in Australian Proterozoic igneous rocks. In Pharaoh, T. C., Beckinsale, R. D. & Rickard, D. (eds) Geochemistry and Mineralization of Proterozoic Volcanic Suites. GEOL SOC LONDON SPEC PUBL 33, 377–394.CrossRefGoogle Scholar
Wyborn, L. A. I., Wyborn, D., Chappell, B. W., Sheraton, J., Tarney, J. F., Collins, W. J. & Drummond, B. J. 1988. Geological evolution of granite compositions with time in the Australian continent—implications for tectonic and mantle processes. GEOL SOC AUST ABSTR 21, 434–435.Google Scholar