The role of ternary projections in colour displays for geochemical maps and in economic mineralogy and petrology

Journal of Geochemical Exploration - Tập 63 - Trang 123-144 - 1998
P.A. Sabine1, R.J. Howarth2
1Lark Rise, Camp Road, Gerrards Cross, Buckinghamshire SL9 7PF, UK
2Research School for Geological and Geophysical Sciences, Birkbeck College and University College, Gower Street, London WC1E 6BT, UK

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Aitchison, 1982, The statistical analysis of compositional data (with discussion), J. R. Stat. Soc., Ser. B, 44, 139 Alderton, 1986, Hessite and electrum from the Ratagain intrusion, north-west Scotland, Mineral. Mag., 50, 179, 10.1180/minmag.1986.050.355.25 Alderton, 1988, Ag–Au–Te mineralization in the Ratagain complex, northwest Scotland, Trans. Inst. Min. Metall., Sect. B, Appl. Earth Sci., 97, 171 Applied Geochemistry Research Unit ICST (Imperial College of Science and Technology), Experimental Cartography Unit NERC/RCA (Natural Environment Research Council/Royal College of Art) and Graphic Evaluation Group RCA, 1972. Experimental Geochemical Map of Part of Northern Ireland, 5a. Experimental Cartography Unit, Royal College of Art, London. Avery, 1973, Soil classification in the Soil Survey of England and Wales, J. Soil Sci., 24, 324, 10.1111/j.1365-2389.1973.tb00769.x Bancroft, 1897, A triangular diagram, J. Phys. Chem., 1, 403, 10.1021/j150589a002 Barbier, 1979, Images géochimiques du socle hercynien dans le Massif Central français, Bull. Bur. Rech. Géol. Min., Paris Ser., 2, 175 Becke, 1896, Gesteine der Columbretes, Tschermaks Mineral. Petrogr. Mitt., 16, 308, 10.1007/BF02993208 Blencoe, 1976, RECPLT and TRIPLT: FORTRAN Printer-plotting routines for rectangular and triangular plots, Comput. Geosci., 2, 171, 10.1016/0098-3004(76)90106-0 Bolivar, S.L., Balog, S.H., Campbell, K., Fugelso, L.E., Weaver, T.A., Weshung, G.W., 1981. Multisource data set integration and characterisation of uranium mineralisation for the Montrose Quadrangle, Colorado. Report LA-8807-MS, April 1981, Los Alamos Scientific Laboratory, Los Alamos, NM, 172 pp. Bowie, 1974, Modern methods in the search for metalliferous ores in Britain, Proc. R. Soc., Ser. A, 399, 299, 10.1098/rspa.1974.0123 Bowles, 1988, Definition and range of composition of naturally occurring minerals with the pseudobrookite structure, Am. Mineral., 73, 1377 British Geological Survey, 1987. Regional Geochemical Atlas. Great Glen. British Geological Survey, Keyworth and Edinburgh, 29 sheets + xvi pp. British Geological Survey, 1990. Regional Geochemical Atlas. Argyll. British Geological Survey, Keyworth and Edinburgh, 33 sheets + xviii pp. British Geological Survey, 1991. Regional Geochemical Atlas. East Grampians Area. British Geological Survey, Keyworth and Edinburgh, 95 pp. British Geological Survey, 1992. Regional Geochemistry of the Lake District and adjacent areas. British Geological Survey, Keyworth, 98 pp. British Geological Survey, 1993. Regional geochemistry of southern Scotland and part of northern England. British Geological Survey, Keyworth, 96 pp. British Geological Survey, 1996. Annual Report of the British Geological Survey 1995–6. Natural Environment Research Council, Swindon, 52 pp. Brown, 1963, Melting relations of Tertiary granitic rocks in Skye and Rhum, Mineral. Mag., 33, 534, 10.1180/minmag.1963.033.262.02 Browning, 1992, Petrological programs for the Mac. 1, Terra Nova, 4, 413, 10.1111/j.1365-3121.1992.tb00830.x Browning, 1992, Petrological programs for the Mac. 2, Terra Nova, 4, 514, 10.1111/j.1365-3121.1992.tb00588.x Burley, A.J., 1976. Report on geophysical surveys at Struy, Inverness-shire. Mineral Reconnaissance Programme Report, Institute of Geological Sciences, London. Butler, 1975, Occurrence of negative open variances in ternary systems, Math. Geol., 7, 31, 10.1007/BF02080632 Butler, 1979, Trends in ternary petrologic variation diagrams — fact or fantasy?, Am. Mineral., 64, 1115 Canning, 1996, Geochemistry of late Caledonian minettes from Northern Britain: implications for the Caledonian sub-continental lithospheric mantle, Mineral. Mag., 60, 221, 10.1180/minmag.1996.060.398.15 Chang, L.L.Y., Howie, R.A., Zussmann, J., 1996. Rock-forming Minerals, Vol. 5B. Non-Silicates: Sulphates, Carbonates, Phosphates, Halides. Longman, Harlow, 383 pp. Chayes, 1960, On correlation between variables of constant sum, J. Geophys. Res., 65, 4185, 10.1029/JZ065i012p04185 Chayes, F., 1971. Ratio Correlation. A Manual for Students of Petrology and Geochemistry. University of Chicago Press, Chicago, IL, 99 pp. Chayes, F., Yoder, H.S., 1971. Some anomalies in the norms of extremely unsaturated lavas. Annual Report of the Director for 1970–71. Geophysical Laboratory, Carnegie Institution, Washington, DC, pp. 204–206. Colman, 1994, Titanium distribution in Britain, Miner. Ind. Int., Bull. Inst. Min. Metall., 1016, 17 Cross, W., Iddings, J.P., Pirsson, L.V., Washington, H.S., 1903. Quantitative Classification of Igneous Rocks. University of Chicago Press, Chicago, IL, 286 pp. Dataplotting Services Inc., 1983. Spectrometer Survey 1:50,000 3-element colour map, Don Mills, Ontario. Deer, 1938, The diorites and associated rocks of the Glen Tilt Complex, Perthshire, Geol. Mag., 75, 174, 10.1017/S0016756800089433 Dott, 1964, Wacke, graywacke and matrix — what approach to immature sandstone classification?, J. Sediment. Petrol., 34, 625 Duval, 1983, Composite colour images of aerial gamma-ray spectrometric data, Geophysics, 48, 722, 10.1190/1.1441502 FitzPatrick, E.A., 1983. Soils. Their Formation, Classification and Distribution. Longman, Harlow, 353 pp. Folk, 1954, The distinction between grain size and mineral composition in sedimentary rock nomenclature, J. Geol., 62, 334, 10.1086/626171 Folk, 1959, Practical petrographic classification of limestones, Bull. Am. Assoc. Pet. Geol., 43, 1 Forbes, E.G., 1971. Tobias Mayer's Opera Inedita. The first translation of the Lichtenberg Edition of 1775, Macmillan, London, 171 pp. Freeman, 1983, Display techniques for integrated data sets, Comput. Geosci., 9, 59, 10.1016/0098-3004(83)90037-7 Gallagher, 1984, Methods of exploration for strata-bound mineral deposits in the Appalachian Caledonian Orogen, Econ. Geol., 79, 1749, 10.2113/gsecongeo.79.7.1749 Gallagher, M.J., Smith, R.T., 1976. Molybdenite mineralisation in Precambrian rocks, near Lairg, Scotland. Mineral Reconnaissance Programme, Report Institute of Geological Sciences 3, Institute of Geological Sciences, London, 77 pp. Gallagher, 1974, Molybdenite mineralization in Precambrian rocks near Lairg, Scotland, Trans. Inst. Min. Metall., Sect. B, Appl. Earth Sci., 83, B81 Garson, 1984, Fenites, breccia dykes, albitites, and carbonatitic veins near the Great Glen Fault, Inverness, Scotland, Q. J. Geol. Soc., 141, 711, 10.1144/gsjgs.141.4.0711 Gibbs, J.W., 1875. On the equilibrium of heterogenous substances, I. Trans. Conn. Acad. 3 (Oct. 1875–May 1876), pp. 108–248. Gibbs, J.W., 1906. The Scientific Papers of J. Willard Gibbs. Longmans, Green, London, 434 pp. Green, 1984, Digital image processing of integrated geochemical and geological information, J. Geol. Soc., 141, 941, 10.1144/gsjgs.141.5.0941 Green, P.M., Bide, P.J., 1986. Identification of mineral exploration targets by use of digital image analysis of interpreted earth sciences information. In: Jones, M.J. (Ed.), Prospecting in Areas of Glacial Terrain 1986. Institution of Mining and Metallurgy, London, pp. 49–60. Guppy, E.M., Sabine, P.A., 1956. Chemical Analyses of Igneous Rocks, Metamorphic Rocks and Minerals 1931–1954. Memoirs of the Geological Survey of Great Britain, Her Majesty's Stationery Office, London, 78 pp. Harker, A., 1909. The Natural History of Igneous Rocks. Methuen, London, 384 pp. Hastie, T.J., Tibshirani, R.J., 1990. Generalised Additive Models. Chapman and Hall, London, 335 pp. Hodge, 1915, The composition of waters in mines of sulphide ores, Econ. Geol., 10, 123, 10.2113/gsecongeo.10.2.123 Holmes, A., 1921. Petrographic Methods and Calculations with Some Examples of Results Achieved. Murby, London, 506 pp. Holmes, A., 1930. Petrographic Methods and Calculations with Some Examples of Results Achieved, 2nd ed. Murby, London, 515 pp. Howarth, 1971, FORTRAN IV Program for grey-level mapping of spatial data, Math. Geol., 3, 95, 10.1007/BF02045955 Howarth, 1996, Sources for a history of the ternary diagram, Br. J. Hist. Sci., 29, 337, 10.1017/S000708740003449X Howarth, 1976, Three-component colour maps from lineprinter output, Trans. Inst. Min. Metall., Sect. B, Appl. Earth Sci., B 85, 234 Howarth, R.J., Sinding-Larsen, R., 1983. Multivariate analysis in statistics and data analysis in geochemical prospecting. In: Govett, G.J.S. (Ed.), Handbook of Exploration Geochemistry, Vol. 2. Elsevier, Amsterdam, pp. 207–289. Iddings, 1892, The eruptive rocks of Electric Peak and Sepulchre Mountain Yellowstone National Park, Annu. Rep. U.S. Geol. Surv., 12, 577 Institute of Geological Sciences, 1978. Regional Geochemical Atlas. Shetland. Institute of Geological Sciences, London and Edinburgh, 22 sheets + xi pp. Institute of Geological Sciences, 1982. Regional Geochemical Atlas. Sutherland. Institute of Geological Sciences, London and Edinburgh, 21 sheets + xii pp. Institute of Geological Sciences, 1983. Regional Geochemical Atlas. The Hebrides. Institute of Geological Sciences, London and Edinburgh, 30 sheets + xiv pp. Krumbein, W.C., Pettijohn, F.J., 1938. Manual of Sedimentary Petrography. Appleton-Century-Crofts, New York and London, 549 pp. Kuno, H., 1968. Differentiation of basalt magmas. In: Hess, H.H., Poldervaart, A. (Eds.), Basalts: The Poldervaart Treatise on Rocks of Basaltic Composition. Interscience, New York, pp. 623–688. Le Bas, 1992, The construction of the total alkali–silica chemical classification of volcanic rocks, Mineral. Petrol., 46, 1, 10.1007/BF01160698 Le Maitre, 1976, Some problems of projection of chemical data into mineralogical classifications, Contrib. Mineral. Petrol., 56, 181, 10.1007/BF00399603 Le Maitre, 1976, The chemical variability of some common igneous rocks, J. Petrol., 17, 589, 10.1093/petrology/17.4.589 Le Maitre, R.W., 1982. Numerical Petrology. Statistical Interpretation of Geochemical Data. Elsevier, Amsterdam, 281 pp. Le Maitre, R.W., Bateman, P., Dudek, A., Keller, J., Lameyre, F., Le Bas, M.J., Sabine, P.A., Schmid, R., Sørensen, H., Streckeisen, A., Woolley, A.R., Zanettin, B., 1989. A Classification of Igneous Rocks and Glossary of Terms. Blackwell, Oxford, 193 pp. Le Maitre, R.W., Bateman, P., Dudek, A., Keller, J., Lameyre, F., Le Bas, M.J., Sabine, P.A., Schmid, R., Sørensen, H., Streckeisen, A., Woolley, A.R., Zanettin, B., 1990. A Classification of Igneous Rocks and Glossary of Terms (flow sheet, in Chinese). Geological Publishing House, Beijing, 1 pp. Le Maitre, R.W., Bateman, P., Dudek, A., Keller, J., Lameyre, F., Le Bas, M.J., Sabine, P.A., Schmid, R., Sørensen, H., Streckeisen, A., Woolley, A.R., Zanettin, B., 1991. A Classification of Igneous Rocks and Glossary of Terms (in Chinese). Geological Publishing House, Beijing, 253 pp. Lindén, A.H., Åkerblom, G., 1976. Method of detecting small or indistinct radioactive sources by airborne gamma-ray spectrometry. In: Jones, M.J. (Ed.), Geology, Mining and Extractive Processing of Uranium. Institution of Mining and Metallurgy, London, pp. 113–120. Lowenstein, P.L., Howarth, R.J., 1972. Automated colour-mapping of three-component systems and its application to regional geochemical reconnaissance. In: Jones, M.J. (Ed.), Geochemical Exploration 1972. Proceedings of the Fourth International Geochemical Exploration Symposium. Institution of Mining and Metallurgy, London, pp. 297–304. Mancey, S.J., Howarth, R.J., 1978. Factor Score Maps of Regional Geochemical Data from England and Wales. Applied Geochemistry Research Group, Imperial College of Science and Technology, London, 2 sheets. Maxwell, J.C., 1848. To find the form of the central bars seen by polarised light in pieces of an unannealed glass. In: Harman, P.M. (Ed.), The Scientific Letters and Papers of James Clerk Maxwell, I. 1846–1862. Cambridge University Press, Cambridge, pp. 101–103. May, F., Peacock, J.D., Smith, D.I., Barber, A.J., 1993. Geology of the Kintail district. Memoir for 1:50,000 British Geological Survey Sheet 72W and part of 71E (Scotland). Her Majesty's Stationery Office, London. McLaurin, 1991, Mineral exploration in the 1990s — discoveries by improved technology?, Miner. Ind. Int., Bull. Inst. Min. Metall., 998, 5 Mead, 1915, Occurrence and origin of the bauxite deposits of Arkansas, Econ. Geol., 10, 28, 10.2113/gsecongeo.10.1.28 Mertie, 1964, Transformation of trilinear and quadriplanar coordinates to and from cartesian coordinates, Am. Mineral., 49, 926 Michel-Lévy, 1897, Note sur la classification des magmas des roches éruptives, Bull. Soc. Géol. Fr. Ser. 3, 25, 326 Miller, W.H., 1857. On the application of elementary geometry to crystallography. Philos. Mag. Ser. 4, 13, 1–8. Nichol, I., Garrett, R.G., Webb, J.S., 1966. Automatic data plotting and mathematical and statistical interpretation of geochemical data. Pap. 66-54, Geological Survey of Canada, Ottawa, pp. 195–210. Nichol, I., Thornton, I., Webb, J.S., Fletcher, E.K., Horsnail, R.F., Khaleelee, J., Taylor, D., 1970. Regional geochemical reconnaissance of the Derbyshire area. Report 70/2, Institute of Geological Sciences, London, 37 pp. Nicholls, 1951, The Glenelg–Ratagain igneous complex, Q. J. Geol. Soc. London, 106, 309, 10.1144/GSL.JGS.1950.106.01-04.17 Niggli, P., 1948. Gesteine und Minerallagerstätten, Vol. I. Birkhauser, Basel. (Transl. R.L. Parker, 1954. Rocks and Mineral Deposits. Freeman, San Francisco, CA, 559 pp.) Nockolds, 1948, The geochemistry of some Caledonian plutonic rocks: a study in the relationship between the major and trace elements of igneous rocks and their minerals, Trans. R. Soc. Edinburgh, 56, 533 Osann, 1900, Versuch einer chemischen Klassifikation der Eruptivgesteine, Tschermaks Mineral. Petrogr. Mitt., 19, 351, 10.1007/BF02994993 Osann, 1903, Versuch einer chemischen Klassifikation der Eruptivgesteine, IV, Tschermaks Mineral. Petrogr. Mitt., 22, 322, 10.1007/BF02996149 O'Sullivan, 1991, A map for all reasons: the role of image processing in mineral exploration, Miner. Ind. Int., Bull. Inst. Min. Metall., 998, 8 Parsons, I., 1979. The Assynt alkaline suite. In: Harris, A.L., Holland, C.H., Leake, B.E. (Eds.), The Caledonides of the British Isles — Reviewed. Geological Society of London Special Publication, Scottish Academic Press, Edinburgh, pp. 677–781. Peach, R.N., Horne, J., Gunn, W., Hinxman, L.W., Cadell, H.M., 1892. Geological Survey of Scotland. One Inch to One Mile Geological Map. Ullapool, Sheet 101. Ordnance Survey Office, Southampton. Peach, B.N., Horn, J., Gunn, G., Clough, C.T., Hinxman, L., 1907. The Geological Structure of the North-West Highlands of Scotland. Memoirs of the Geological Survey, Scotland, His Majesty's Stationery Office, Glasgow, 668 pp. Peach, B.N., Horne, J., Woodward, H.B., Clough, C.T., Harker, A., Wedd, C.B., 1910. The Geology of Glenelg, Lochalsh and South-East Part of Skye: Explanation of One-inch Map 71. Memoir of the Geological Survey, Scotland, Her Majesty's Stationery Office, Edinburgh, 206 pp. Peach, B.N., Gunn, W., Clough, C.T., Hinxman, B.A., Crampton, C.R., Anderson, E.M., 1912. The Geology of Ben Wyvis, Carn Chuinneag, Inchbae and the Surrounding Country. Memoirs of the Geological Survey, Scotland, His Majesty's Stationery Office, Edinburgh, 189 pp. Peach, B.N., Horne, J., Hinxman, L.W., Crampton, C.B., Anderson, E.M., Carruthers, R.G., 1913. The Geology of Central Ross-shire. Memoirs of the Geological Survey, Scotland, His Majesty's Stationery Office, Edinburgh, 114 pp. Peach, R.N., Horn, J., Clough, C.T., Hinxman, L.W., Cadell, H.M., Dinham, C.H., 1923. Geological Survey of Scotland. One Inch to One Mile Geological Map. Assynt District. Parts of Sheets 101, 102, 107 and 108. Ordnance Survey Office, Southampton. Pichler, H., Stengelin, R., 1973. Application of the Rittmann Norm Method to petrological problems. The problem of the classification of volcanic rocks. In: Rittman, A. (Ed.), Stable Mineral Assemblages of Igneous Rocks. A Method of Calculation. Springer, Berlin, pp. 225–231. Piper, 1944, A graphic procedure in the geochemical interpretation of water-analyses, Trans. Am. Geophys. Union, 25, 914, 10.1029/TR025i006p00914 Plant, 1979, Regional geochemical mapping and interpretation in Britain, Philos. Trans. R. Soc. Ser. B, 288, 95, 10.1098/rstb.1979.0093 Plant, 1974, Mapping minerals, Geogr. Mag., 46, 123 Plant, 1989, The gold pathfinder elements As, Sb and Bi — their distribution and significance in the southwest Highlands of Scotland, Trans. Inst. Min. Metall., Sect. B, Appl. Earth Sci., 98, B91 Plant, 1991, Regional distribution of As, Sb and Bi in the Grampian Highlands of Scotland and the English Lake District: implications for gold metallogeny, Trans. Inst. Min. Metall., Sect. B, Appl. Earth Sci., 100, B135 Read, H.H., Ross, G., Phemister, J., 1925. The Geology of the Country around Golspie, Sutherlandshire. Memoirs of the Geological Survey, Scotland, His Majesty's Stationery Office, Edinburgh, 143 pp. Read, H.H., Phemister, J., Dinman, C.H., Macgregor, M., 1926. The Geology of Strath Oykell and Lower Loch Shin. Memoirs of the Geological Survey, Scotland, His Majesty's Stationery Office, Edinburgh, 220 pp. Rhind, 1974, High speed maps by laser beam, Geogr. Mag., 46, 393 Rhind, 1973, Experimental geochemical maps. A case study in cartographic techniques for scientific research, Cartogr. J., 10, 112, 10.1179/000870473786934707 Richardson, K.A., 1983. Airborne gamma-ray spectrometric survey of the NEA/IAEA Athabasca test area. In: Cameron, E.M. (Ed.), Uranium Exploration in Athabasca Basin, Saskatchewan, Canada. Geol. Surv. Can. Pap. 82-11, 167–170. Richey, 1939, The dykes of Scotland, Trans. Edinburgh Geol. Soc., 13, 393, 10.1144/transed.13.4.393 Rittman, 1952, Nomenclature of volcanic rocks, Bull. Volcanol., 2, 75, 10.1007/BF02596015 Rittman, A., Gottini, V., Hewers, W., Pichler, H., Stengelin, R., 1973. Stable Mineral Assemblages of Igneous Rocks. A Method of Calculation. Springer, Berlin, 262 pp. Robinson, G.W., 1949. Soils, their Origin, Constitution and Classification. Murby, London, 573 pp. Rock, 1984, Nature and origin of calc-alkaline lamprophyres: minettes, vogesites, kersantites and spessartites, Trans. R. Soc. Edinburgh, 74, 193, 10.1017/S0263593300013663 Rock, N.M.S., 1991. Lamprophyres. Blackie, Glasgow, 285 pp. Rock, 1988, Late Caledonian dyke-swarms of Northern Britain: some preliminary petrogenetic and tectonic implications of their province-wide distribution and chemical variation, Can. Mineral., 26, 3 Rollinson, H.R., 1993. Using Geochemical Data: Evaluation, Presentation, Interpretation. Longman, Harlow, 352 pp. Rosenbusch, H., Osann, A., 1923. Elemente der Gesteinslehre. Schweizerbart, Stuttgart, 779 pp. Sabine, 1989, Setting standards in petrology: The Commission on Systematics in Petrology, Episodes, 12, 84, 10.18814/epiiugs/1989/v12i2/004 Sabine, P.A., 1951. The Post-Cambrian Sills and Dykes of Assynt and the Adjoining Districts of North-West Scotland. PhD Thesis, London University, 342 pp. (unpubl.) Sabine, 1953, The petrography and geological significance of the post-Cambrian minor intrusions of Assynt and the adjoining districts of North-west Scotland, Q. J. Geol. Soc. London, 109, 137, 10.1144/GSL.JGS.1953.109.01-04.08 Sabine, 1963, The Strontian granite complex, Argyllshire, Bull. Geol. Surv. G. B., 20, 6 Shand, 1994, Late Caledonian lamprophyre dyke swarms of South-Eastern England, Mineral. Petrol., 51, 277, 10.1007/BF01159733 Shepard, 1954, Nomenclature based on sand–silt–clay ratios, J. Sediment. Petrol., 24, 151 Sidder, 1994, PETRO.CALC.PLOT, Microsoft EXCEL macros to aid petrologic interpretation, Comput. Geosci., 20, 1041, 10.1016/0098-3004(94)90040-X Simpson, 1996, High resolution regional hydrogeochemical baseline mapping of stream water of Wales, the Welsh borders and West midlands region, Appl. Geochem., 11, 621, 10.1016/S0883-2927(96)00001-7 Smith, D.I., 1979. Caledonian minor intrusions of the N Highlands of Scotland. In: Harris, A.L., Holland, C.H., Leake, B.E. (Eds.), The Caledonides of the British Isles — Reviewed. Geological Society of London Special Publication, Scottish Academic Press, Edinburgh, pp. 683–697. Soper, 1963, The structure of the Rogart igneous complex, Sutherland, Scotland, Q. J. Geol. Soc., 119, 445, 10.1144/gsjgs.119.1.0445 Spear, F.S., Ferry, J.M., Rumble, D., 1982a. Analytical formulation of phase equilibria: the Gibbs' Method. In: Ferry, J.M. (Ed.), Characterisation of Metamorphism Through Mineral Equilibria. Reviews in Mineralogy, Mineralogical Society of America, Washington, DC, pp. 105–152. Spear, F.S., Rumble, D., Ferry, J.M., 1982b. Linear algebraic manipulation of n-dimensional composition space. In: Ferry, J.M. (Ed.), Characterisation of Metamorphism Through Mineral Equilibria. Reviews in Mineralogy, Mineralogical Society of America, Washington, DC, pp. 53–104. Stone, 1991, Geochemistry characterizes provenance in southern Scotland, Geol. Today, 1991, 171 Stone, 1995, Lithostratigraphic and structural controls on distribution of As and Au in southwest Southern Uplands, Scotland, Trans. Inst. Min. Metall., Sect. B, Appl. Earth Sci., 104, B111 Streckeisen, 1976, To each plutonic rock its proper name, Earth Sci. Rev., 12, 1, 10.1016/0012-8252(76)90052-0 Streckeisen, 1979, Classification and nomenclature of volcanic rocks, lamprophyres, carbonatites and melilitic rocks: recommendations and suggestions of the IUGS Subcommission on the Systematics of Igneous Rocks, Geology, 7, 331, 10.1130/0091-7613(1979)7<331:CANOVR>2.0.CO;2 Sutherland, D.S., Pankhurst, R.J., 1982. Chemical analyses of Caledonian intrusive rocks (Appendix B). In: Sutherland, D.S. (Ed.), Igneous Rocks of the British Isles. Wiley, Chichester, pp. 554–555, 557. Thompson, 1957, The graphical analysis of mineral assemblages in pelitic schists, Am. Mineral., 42, 842 Thompson, J.B., 1982a. Composition space: an algebraic and geometric approach. In: Ferry, J.M. (Ed.), Characterisation of Metamorphism Through Mineral Equilibria. Reviews in Mineralogy, Mineralogical Society of America, Washington, DC, pp. 1–31. Thompson, R.N., 1982b. Geochemistry and magma genesis. In: Sutherland, D.S. (Ed.), Igneous Rocks of the British Isles. Wiley, Chichester, pp. 461–477. Tomkeieff, 1934, Clay minerals and bauxitic minerals. A review and classification based on a statistical method, Mineral. Mag., 23, 463, 10.1180/minmag.1933.023.143.04 Topley, 1984, TRIGPLOT: an interactive program in BASIC for plotting triangular diagrams, Comput. Geosci., 10, 277, 10.1016/0098-3004(84)90027-X Tuttle, O.F., Bowen, N.L., 1958. Origin of Granite in the Light of Experimental Studies in the System NaAlSi3O8–KAlSi3O8–SiO2–H2O. Memoir 74, Geological Society of America, Washington, DC, 153 pp. Upton, 1994, Picturing the 1992 British general election, J. R. Stat. Soc., Ser. A, 157, 231, 10.2307/2983360 Vaughan, 1996, A tectonomagmatic model for the genesis and emplacement of Caledonian calc-alkaline lamprophyres, J. Geol. Soc., 153, 613, 10.1144/gsjgs.153.4.0613 von Philipsborn, 1928, Zur graphischen Behandlung quaternärer Systeme, Neues Jahrb. Mineral., Geol. Paläontol. Mugge-Festband, 57A, 973 Wainer, 1995, Trilinear plots, Chance, 8, 48, 10.1080/09332480.1995.11884560 Wainer, 1996, Using trilinear plots for NEAP data, J. Educ. Measurement, 33, 41, 10.1111/j.1745-3984.1996.tb00478.x Weale, 1957, Trichromatic ideas in the seventeenth and eighteenth centuries, Nature, 179, 648, 10.1038/179648a0 Webb, 1979, Regional geochemical mapping, Philos. Trans. R. Soc. Ser. B, 288, 81, 10.1098/rstb.1979.0092 Webb, J.S., Fortescue, J., Nichol, I., Tooms, J.S., 1964a. Regional Geochemical Reconnaissance in the Namwala Concession Areas, Zambia. Technical Communication 47, Geochemical Prospecting Research Centre, Imperial College of Science and Technology, London, 42 pp. Webb, J.S., Fortescue, J., Nichol, I., Tooms, J.S., 1964b. Regional Geochemical Maps of the Namwala Concession Areas, Zambia, Based on a Reconnaissance Stream Sediment Survey. Geological Survey of Zambia, Lusaka, 11 sheets. Webb, J.S., Nichol, I., Foster, R., Lowenstein, P.L., Howarth, R.J., 1973. Provisional Geochemical Atlas of Northern Ireland. Technical Communication 60, Applied Geochemistry Research Group, Imperial College of Science and Technology, London, 33 sheets + v pp. Webb, J.S., Thornton, I., Thompson, M., Howarth, R.J., Lowenstein, P.L., 1978. The Wolfson Geochemical Atlas of England and Wales. Oxford University Press, Oxford, 50 sheets + 14 pp. Whewell, W., 1825. A general method of calculating the angles made by any planes of crystals, and the laws according to which they are formed. Philos. Trans. R. Soc. 115, 87–130. Wilson, G.V., Flett, J.S., 1921. The Lead, Zinc, Copper, and Nickel Ores of Scotland. Memoirs of the Geological Survey, Scotland, Special Reports on the Mineral Resources of Great Britain, 27, Her Majesty's Stationery Office, Edinburgh, 159 pp. Woolley, 1996, Classification of lamprophyres, lamproites, kimberlites and the kalsilitic, melilitic and leucitic rocks, Can. Mineral., 34, 175 Wright, W.D., 1967. The Rays are not Coloured. Adam Hilger, London, 154 pp. Yoder, 1986, Linear alkali correlation in oceanic alkali basalts, Bull. Geol. Soc. Finl., 58, 81, 10.17741/bgsf/58.1.006 Zaporozec, 1972, Graphical interpretation of water-quality data, Ground Water, 10, 32, 10.1111/j.1745-6584.1972.tb02912.x