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Petrochemical evidence for the genesis of a Lower Carboniferous transitional basaltic suite in the Midland Valley of Scotland

Published online by Cambridge University Press:  03 November 2011

J. G. MacDonald  and
F. Whyte
J. G. MacDonald
Affiliation:
Department of Adult and Continuing Education, University of Glasgow, Glasgow G12 8LW, Scotland.
F. Whyte
Affiliation:
Department of Geology, University of Dundee, Dundee DDI 4HN, Scotland.
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Abstract

Studies of the chemistry of Lower Carboniferous igneous rocks in the Midland Valley of Scotland throw light on the nature and magmatic evolution of transitional basaltic suites. Major oxide and trace element chemistry of least altered lavas of the Campsie Fells reveals a lower group of basalts, basaltic hawaiites and hawaiites, and an upper, more variable group, ranging from basalt to trachyte. Chemical composition of associated vent intrusions confirms their association with the lower group of flows. The magmatically evolved condition of the erupted material indicates high-pressure fractionation of clinopyroxene at depth followed by fractional crystallisation of olivine, plagioclase and Ti-Fe ores at lower pressures. In the case of the upper lavas, further differentiation appears to have taken place in a shallow magma chamber under a central volcano.

The observed chemical variations in the Campsie Fells and other areas of Lower Carboniferousvolcanic activity can be attributed to a number of different factors during the evolution of the magmas. Detailed studies of the cumulative phases of the lavas may throw further light on the various stages involved.

Keywords

differentiation modelfractionationhawaiitehigh-pressure clinopyroxeneliquidusmagmaolivineplagioclasepolybarictrachytevent intrusionwithin-plate.
Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 72 , Issue 2 , 1981 , pp. 75 - 88
Copyright
Copyright © Royal Society of Edinburgh 1981

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References

Alomari, M. I. 1980. Geological interpretations of the gravity field of the western Midland Valley of Scotland. Unpublished Ph.D. Thesis, Glasgow University.Google Scholar
Assumpçao, M. & Bamford, D. 1978. LISPB-V. Studies of crustal shear waves. GEOPHYS J R ASTRON SOC 54, 61–74.CrossRefGoogle Scholar
Bailey, E. B. & Grabham, G. W. 1909. Albitisation of basic plagioclase felspar. GEOL MAG 6, 250–6.CrossRefGoogle Scholar
Barberi, F., Fernard, G., Santacroce, R., Trevil, M. & Varet, J. 1975. A transitional basalt-pantellerite sequence of fractional crystallisation, the Boina Centre (Afar Rift, Ethiopia). J PETROL 16, 57–79.CrossRefGoogle Scholar
Bluck, B. J. 1978. Sedimentation in a late orogenic basin: the Old Red Sandstone of the Midland Valley of Scotland. In Bowes, D. R. & Leake, B. E. (eds) Crustal evolution in northwestern Britain and adjacent regions, 249–78. GEOL J SPEC ISSUE 10.Google Scholar
Bluck, B. J. 1980. Evolution of a strike-slip controlled basin, Upper Old Red Sandstone, Scotland. SPEC PUBL INT ASSOC SEDIMENTOL 4, 63–78.Google Scholar
Carmichael, I. S. E. 1964. The petrology of Thingmuli, a Tertiary volcano in Eastern Iceland. J PETROL 5, 435–60.CrossRefGoogle Scholar
Chapman, N. A. 1976. Inclusions and megacrysts from undersaturated tuffs and basanites, East Fife, Scotland. J PETROL 17, 472–98.CrossRefGoogle Scholar
Clark, R. H. 1956. A petrochemical study of the Arthur's Seat Volcano. TRANS R SOC EDINBURGH 63, 37–70.CrossRefGoogle Scholar
Coombs, D. S. 1963. Trends and affinities of basaltic magmas as illustrated on the diopside-silica-olivine diagram. SPEC PAP MINERAL SOC AM 1, 227–50.Google Scholar
Coombs, D. S. & Wilkinson, J. F. G. 1969. Lineages and fractionation trends in undersaturated volcanic rocks from East Otago Volcanic Province (New Zealand) and related rocks. J PETROL 10, 440–501.CrossRefGoogle Scholar
Cotton, W. R. 1968. A geophysical survey of the Campsie and Kilpatrick Hills. Univ. Glasgow Ph.D. thesis (unpubl.).Google Scholar
Craig, P. M. & Hall, I. H. S. 1975. The Lower Carboniferous rocks of the Campsie-Kilpatrick area. SCOTT J GEOL 11, 171–4.CrossRefGoogle Scholar
El-Hinnawi, E. E. 1964. Petrochemical characters of African volcanic rocks. Part II East Africa. NEUES JAHRB MINERAL, 166–87.Google Scholar
Ford, C. E. & Macdonald, R. 1978. Melting relations of a Midland Valley alkali basalt. In Progress in experimental petrology (4th progress report 1975–8), 196–7. Manchester: Natural Environment Research Council.Google Scholar
Goswami, G. 1968. A magnetic and chemical study of the titanium-bearing ore minerals of Carboniferous igneous rocks of the Midland Valley of Scotland. Unpublished Ph.D. Thesis, Glasgow University.Google Scholar
Goswami, G. 1969. Water content in natural cation-deficient Fe-Ti spinel. J ASSAM SCI SOC 12, 98–104.Google Scholar
Hamilton, J. 1956. Mineralogy of basalts from the western Kilpat-rick Hills and its bearing on the petrogenesis of Scottish Carboniferous olivine basalts. TRANS EDINBURGH GEOL SOC 16, 280–98.CrossRefGoogle Scholar
Macdonald, G. A. & Katsura, T. 1964. Chemical composition of Hawaiian lavas. J PETROL 5, 83–133.CrossRefGoogle Scholar
MacDonald, J. G. 1965. The Petrology of the Clyde Plateau Lavas of the Campsie and Kilpatrick Hills. Unpublished Ph.D. Thesis, Glasgow University.Google Scholar
MacDonald, J. G. 1967. Variations within a Scottish Lower Carboniferous lava flow. SCOTT J GEOL 3, 34–45.CrossRefGoogle Scholar
MacDonald, J. G. 1973. Carbon-dioxide metasomatism in the Campsie Lavas. MINERAL MAG 39, 119–21.CrossRefGoogle Scholar
Macdonald, R. 1975. Petrochemistry of the Early Carboniferous (Dinantian) lavas of Scotland. SCOTT J GEOL 11, 269–314.CrossRefGoogle Scholar
Macdonald, R. 1980. Trace element evidence for mantle heterogeneity beneath the Scottish Midland Valley in the Carboniferous and Permian. PHILOS TRANS R SOC LONDON A297, 245–57.Google Scholar
Macdonald, R., Thomas, J. E. & Rizzello, S. A. 1977. Variations in basalt chemistry with time in the Midland Valley province during the Carboniferous and Permian. SCOTT J GEOL 13, 11–22.CrossRefGoogle Scholar
MacGregor, A. G. 1928. The classification of Scottish Carboniferous olivine-basalts and mugearites. TRANS GEOL SOC GLASGOW 18, 324–60.CrossRefGoogle Scholar
Macgregor, M., Dinham, C. H., Bailey, E. B. & Anderson, E. M. 1925. The geology of the Glasgow district (2nd edn). MEM GEOL SURV UK.Google Scholar
Manson, V. 1967. Geochemistry of basaltic rocks: major elements. In Hess, H. H. & Poldervaart, A. (eds) Basalts, vol. 1, 215–69. New York: John Wiley.Google Scholar
Osborn, E. F. 1959. Role of oxygen pressure in the crystallisation and differentiation of basaltic magma. AM J SCI 257, 609–47.CrossRefGoogle Scholar
Pearce, J. A. & Cann, J. R. 1973. Tectonic setting of basic vojcanic rocks determined using trace element analyses. EARTH PLANET SCI LETT 19, 290–300.CrossRefGoogle Scholar
Powell, D. W. 1978. Gravity and magnetic anomalies attributable to basement sources under northern Britain. In Bowes, D. R. & Leake, B. E. (eds) Crustal evolution in northwestern Britain and adjacent regions, 107–14. GEOL J SPEC ISSUE 10.Google Scholar
Riley, J. P. 1958a. The rapid analysis of silicate rocks and minerals. ANAL CHIM ACTA 19, 413–28.CrossRefGoogle Scholar
Riley, J. P. 1958b. Simultaneous determination of water and carbon dioxide in rocks and minerals. ANALYST 83, 42.CrossRefGoogle Scholar
Shapiro, L. & Brannock, W. W. 1962. Rapid analysis of silicate, carbonate and phosphate rocks. BULL U S GEOL SURV 1144A.Google Scholar
Stormer, J. C. & Nicholls, J. 1978. XLFRAC: a program for the interactive testing of magma tic differentiation models. COMPUT GEOSCI 4, 143–59.CrossRefGoogle Scholar
Thompson, R. N. 1974a. Primary Basalts and Magma Genesis I. Skye, North-West Scotland. CONTRIB MINERAL PETROL 45, 317⁁11.CrossRefGoogle Scholar
Thompson, R. N. 1974b. Some high-pressure pyroxenes. MINERAL MAG 39, 768–87.CrossRefGoogle Scholar
Thompson, R. N., Esson, J. & Dunham, A. C. 1972. Major element chemical variation in the Eocene lavas of the Isle of Skye, Scotland. J PETROL 13, 219–53.CrossRefGoogle Scholar
Thompson, R. N. & Kushiro, I. 1972. The oxygen fugacity within graphite capsules in piston-cylinder apparatus at high pressures. CARNEGIE INST WASHINGTON YEARB 71, 615–6.Google Scholar
Thornton, C. P. & Tuttle, O. F. 1960. Chemistry of Igneous Rocks I. Differentiation Index. AM J SCI 258, 664–84.CrossRefGoogle Scholar
Tomkeieff, S. I. 1937. Petrochemistry of the Scottish Carboniferous-Permian igneous rocks. BULL VOLCANOL (2)1, 59–87.CrossRefGoogle Scholar
Wedepohl, K. H. 1975. The contribution of chemical data to assumptions about the origin of magmas from the mantle. FORTSCHR MINERAL 52, 141–72.Google Scholar
Whyte, F. 1966. Dumbarton rock. SCOTT J GEOL 2, 107–21.CrossRefGoogle Scholar
Whyte, F. & MacDonald, J. G. 1974. Lower Carboniferous vul-canicity in the northern part of the Clyde Plateau. SCOTT JGEOL 10, 187–98.CrossRefGoogle Scholar