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Weathering of the primary rock-forming minerals: processes, products and rates

Published online by Cambridge University Press:  09 July 2018

M. J. Wilson
M. J. Wilson*
Affiliation:
The Macaulay Institute, Craigiebuckler, Aberdeen AB15 8QH, UK
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Abstract

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This paper describes the ways in which the major rock-forming primary minerals (olivine, pyroxenes, amphiboles, feldspars, micas and chlorites) break down during weathering, the products that develop during this breakdown and the rates at which this breakdown occurs. The perspective chosen to illustrate this vast topic is that of the residual soil weathering profile. Different physical and chemical conditions characterize the various parts of such a profile. Thus, in the slightly weathered rock at the base of the profile, mineral weathering will take place in microfissures and narrow solution channels and the capillary water in such spatially restricted volumes may be expected to be close to equilibrium with the primary mineral. In these circumstances, the weathering product formed may be closely related to the primary mineral both compositionally and structurally. The saprolite higher up in the weathering profile may or may not retain the fabric and structure of the original parent rock, but in either case the close relationship observed between primary mineral and weathering product in the slightly weathered rock may be lost. This part of the profile will usually be affected by freely flowing drainage waters, the composition of which will be far from equilibrium with specific primary minerals. Weathering products which do form are likely to reflect the interaction between bulk water and bulk parent material. In the soil profile, the situation will be further complicated by organic ligands derived from decomposing organic matter or from the direct activities of soil microbes or plant roots. Thus, biological weathering will assume a much greater significance in this part of the profile compared with the mainly inorganic processes dominating in the saprolite and the slightly weathered rock. The general nature of any particular weathering profile will reflect the interactions between climate, topography, parent material, soil biota and time and superimposed upon this complexity, when considering how individual primary minerals break down in detail, will be factors related to the nature of the mineral itself. Particularly important in this respect is the inherent susceptibility of the mineral to weathering, which is related to overall chemical composition and structure, as well as the distribution and density of defects, dislocations and exsolution features, which often control the progress of the weathering reaction.

Keywords

weatheringolivinepyroxeneamphibolefeldsparbiotitemuscovitechloritesoilsaprolite
Type
Research Article
Information
Clay Minerals , Volume 39 , Issue 3 , September 2004 , pp. 233 - 266
Creative Commons
Creative Common License - CCCreative Common License - BY
Copyright © The Mineralogical Society of Great Britain and Ireland 2004 This is an Open Access article, distributed under the terms of the Creative Commons Attribution license. (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2004

References

Acker, J.B. & Bricker, O.P. (1992) The influence of pH on biotite dissolution and alteration kinetics at low temperature. Geochimica et Cosmochimica Acta, 56, 3073–3092.CrossRefGoogle Scholar
Adams, W.A. (1976) Experimental evidence on the origin of vermiculite in soils on Lower Palaeozoic sediments. Soil Science Society of America Journal, 40, 793–795.CrossRefGoogle Scholar
Adams, W.A & Kassim, J.K. (1983) The origin of vermiculite in soils developed from Lower Palaeozoic sedimentary rocks in Mid-Wales. Soil Science Society of America Journal, 47, 316–320.CrossRefGoogle Scholar
Ahn, J.H. & PeacorD.R. (1987) Kaolinization of biotite: TEM data and implications for an alteration mechanism. American Mineralogist, 72, 353–356.Google Scholar
Anand, R.R. & Gilkes, R.J. (1984) Weathering of hornblende, plagioclase and chlorite in meta-dolerite, Australia. Geoderma, 34, 261–280.CrossRefGoogle Scholar
Anand, R.R., Gilkes, R.J., Armitage, T. & Hillyer, J. (1985) The influence of microenvironment on feldspar weathering in lateritic saprolite. Clays and Clay Minerals. 33, 31–46.CrossRefGoogle Scholar
Anbeek, C. (1992) The dependence of dissolution rates on grain size for some fresh and weathered feldspars. Geochimica et Cosmochimica Acta. 56, 3957–3970.CrossRefGoogle Scholar
Anbeek, C. (1993) The effect of natural weathering on dissolution rates. Geochimica et Cosmochimica Acta, 57, 4963–4975.CrossRefGoogle Scholar
Aouidjit, H., Elsass, F., Righi, D. & Robert, M. (1996) Mica weathering in acidic soils by analytical electron microscopy. Clay Minerals, 31, 319–332.Google Scholar
April, R.H., Hluchy, M.M. & Newton, R.M. (1986) The nature of vermiculite in Adirondack soils and till. Clays and Clay Minerals, 34, 549–556.CrossRefGoogle Scholar
Aspandiar, M.F & Eggleton, R.A. (2002a) Weathering of chlorite. I. Reactions and products in microsystems controlled by the primary mineral. Clays and Clay Minerals, 50, 685–698.Google Scholar
Aspandiar, M.F. & Eggleton, R.A. (2002b) Weathering of chlorite. II. Reactions and products in microsystems controlled by the solution avenues. Clays and Clay Minerals, 50, 699–709.Google Scholar
Awad, A., Koster van Groos, A.F. & Guggenheim, S. (2000) Forsteritic olivine: Effect of crystallographic direction on dissolution kinetics. Geochimica et Cosmochimica Acta, 64, 1765–1772.CrossRefGoogle Scholar
Bain, D.C. (1977) The weathering of ferruginous chlorite in a podzol from Argyllshire, Scotland. Geoderma, 17, 193–208.CrossRefGoogle Scholar
Bain, D.C. & Duthie, D.M.L. (1984) The effect of weathering in the silt fractions on the apparent stability of chlorite in Scottish soil clays. Geoderma, 34, 221–227.CrossRefGoogle Scholar
Bain, D.C., Mellor, A. & Wilson, M.J. (1990) Nature and origin of an aluminous vermiculitic weathering product in acid soils from upland catchments in Scotland. Clay Minerals, 25, 467–475.CrossRefGoogle Scholar
Bain, D.C., Mellor, A., Wilson, M.J. & Duthie, D.M.L. (1994) Chemical and mineralogical weathering rates and processes in an upland granitic till catchment in Scotland. Water, Air and Soil Pollution, 73, 11–27.CrossRefGoogle Scholar
Banfield, J.F. & Barker, W.W. (1994) Direct observation of reactant-product interfaces formed in natural weathering of exsolved defective amphibole to smectite: Evidence for episodic, isovolumetric reactions involving structural inheritance. Geochimica et Cosmochimica Acta, 58, 1419–1429.CrossRefGoogle Scholar
Banfield, J.F. & Eggleton, R.A. (1988) Transmission electron microscope study of biotite weathering. Clays and Clay Minerals, 36, 47–60.CrossRefGoogle Scholar
Banfield, J.F. & Eggleton, R.A. (1990) Analytical transmission electron microscope studies of plagioclase, muscovite and K-feldspar weathering. Clays and Clay Minerals, 38, 77–89.CrossRefGoogle Scholar
Banfield, J.F. & Murakami, T. (1998) Atomic resolution transmission electron microscope evidence for the mechanism by which chlorite weathers to 1:1 semir e g u l a r chlorite–vermiculite. American Mineralogist, 83, 348–357.CrossRefGoogle Scholar
Banfield, J.F., Veblen, D.R. & Jones, B.F. (1990) Transmission electron microscopy of subsolidus oxidation and weathering of olivine. Contributions to Mineralogy and Petrology, 106, 110–123.CrossRefGoogle Scholar
Banfield, J.F., Jones, B.F. & Veblen, D.R. (1991) An AEM-TEM study of weathering and diagenesis, Abert Lake, Oregon: I. Weathering reactions in the volcanics. Geochimica et Cosmochimica Acta, 55, 2781–2793.Google Scholar
Banfield, J.F., Ferruzzi, G.G., Casey, W.H. & Westrich, H.R. (1995) HRTEM study comparing naturally and experimentally weathered pyroxenoids. Geochimica et Cosmochimica Acta, 59, 19–31.CrossRefGoogle Scholar
Banfield, J.F., Barker, W.W., Welch, S.A. & Taunton, A. (1999) Biological impact on mineral dissolution: Application of the lichen model to understanding mineral weathering in the rhizosphere. Proceedings of the National Academy of Science, USA, 96, 3404–3411.CrossRefGoogle ScholarPubMed
Barker, W.W. & Banfield, J.F. (1996) Biologically versus inorganically mediated weathering reactions; relationships between minerals and extracellular microbial polymers in lithobiontic communities. Chemical Geology, 132, 55–69.CrossRefGoogle Scholar
Barker, W.W. & Banfield, J.F. (1998) Zones of chemical and physical interaction at interfaces between microbial communities and minerals; A model. Geomicrobiology Journal, 15, 223–244.CrossRefGoogle Scholar
Barker, W.W., Welch, S.A., Chu, S. & Banfield, J.F. (1998) Experimental observations on the effects of bacteria on aluminosilicate weathering. American Mineralogist, 83, 1551–1563.CrossRefGoogle Scholar
Barnhisel, R.I. & Bertsch, P.M. (1989) Chlorites and Hydroxy Interlayered Vermiculite and Smectite. Pp. 729–788 in: Minerals and Soil Environments (Dixon, J.B. and Weed, S.B., editors). Published by the Soil Science Society of America, Madison, Wisconsin.Google Scholar
Barshad, I. (1948) Vermiculite and its relation to biotite as revealed by base exchange reactions, X-ray analysis, differential thermal curves and water content. American Mineralogist, 33, 655–678.Google Scholar
Barshad, I. & Kishk, F.M. (1968) Oxidation of ferrous iron in vermiculite and biotite alters fixation and replaceability of potassium. Science, 162, 1401–1402.CrossRefGoogle ScholarPubMed
Basham, I.R. (1974) Mineralogical changes associated with deep weathering of gabbro in Aberdeenshire. Clay Minerals, 10, 189–202.CrossRefGoogle Scholar
Bassett, W.A. (1960) Role of hydroxyl orientation in mica alteration. Geological Society of America Bulletin, 71, 449–456.CrossRefGoogle Scholar
Berner, R.A. (1991) A model of atmospheric CO2 over Phanerozoic time. American Journal of Science, 291, 339–376.CrossRefGoogle Scholar
Berner, R.A. & Holdren, G.R. (1977) Mechanism of feldspar weathering: Some observational evidence. Geology, 5, 369–372.2.0.CO;2>CrossRefGoogle Scholar
Berner, R.A. & Holdren, G.R. (1979) Mechanism of feldspar weathering - II. Observations of feldspars from soils. Geochimica et Cosmochimica Acta 43, 1173–1186.CrossRefGoogle Scholar
Berner, R.A. & Schott, J. (1982) Mechanism of pyroxene and amphibole weathering. II Observations of soil grains. American Journal of Science. 282, 1214–1231.CrossRefGoogle Scholar
Berner, R.A., Sjöberg, E.L., Velbel, M.A. & Krom, M.D. (1980) Dissolution of pyroxenes and amphiboles during weathering. Science, 207, 1205–1206.CrossRefGoogle ScholarPubMed
Berner, R.A., Hodren, G.R. & Schott, J. (1985) Surface layers on dissolving silicates. (Comments on “Study of the weathering of albite at room temperature and pressure with a fluidised bed reactor” by Chou, L. & Wollast, R.. Geochimica et Cosmochimica Acta, 49, 1657–1658.Google Scholar
Blum, A.E. & Stillings, L.L (1995) Feldspar dissolution kinetics. Pp. 291–351 in: Chemical Weathering Rates in Silicate Minerals (White, A.F. and Brantley, S.L., editors). Reviews in Mineralogy, 31, Mineralogical Society of America, Washington, D.C.Google Scholar
Blum, A.E., Yund, R.A. & Lasaga, A.C. (1990) The effect of dislocation density on the dissolution rate of quartz. Geochimica et Cosmochimica Acta, 54, 283–297.CrossRefGoogle Scholar
Boyle, J.R., Voigt, G.K. & Sawney, B.L. (1967) Biotite flakes; alteration by chemical and biological treatment. Science, 155, 193–195.CrossRefGoogle ScholarPubMed
Brady, P.V., Dorn, R.I., Brazel, A.J., Clark, J., Moore, R.B. & Glidewell, T. (1999) Direct effects of lichen, rainfall and temperature on silicate weathering. Geochimica et Cosmochimica Acta, 63, 3293–3300.CrossRefGoogle Scholar
Brantley, S.L. & Chen, Y. (1995) Chemical weathering rates of pyroxenes and amphiboles. Pp. 119–172 in: Chemical Weathering Rates in Silicate Minerals (White, A.F. and Brantley, S.L., editors). Reviews in Mineralogy, 31, Mineralogical Society of America, Washington, D.C.Google Scholar
Brantley, S.R. & Stillings, L.L. (1996) Feldspar dissolution at 25°C and low pH. American Journal of Science, 296, 101–127.CrossRefGoogle Scholar
Brown, G. (1953) The dioctahedral analogue of vermiculite. Clay Minerals Bulletin, 2, 64–69.Google Scholar
Brown, G. & Stephen, I. (1959) A structural study of iddingsite from New South Wales, Australia. American Mineralogist, 44, 251–260.Google Scholar
Carnicelli, S., Mirabella, A., Cecchini, G. & Sansi, G. Weathering of chlorite to a low-charge expandable mineral in a Spodosol on the Appenine mountains, Italy. Clays and Clay Minerals, 45, 28–41.Google Scholar
Casey, W.H., Westrich, H.R., Arnold, G.W. & Banfield, J.F. (1989) The surface chemistry of dissolving labradorite feldspar. Geochimica et Cosmochimica Acta, 53, 821–832.CrossRefGoogle Scholar
Casey, W.H., Carr, M.J. & Graham, R.A. (1991a) Crystal defects and the dissolution kinetics of rutile. Geochimica et Cosmochimica Acta, 52, 1545–1556.Google Scholar
Casey, W.H., Westrich, H.R. & Holdren, G.R. (1991b) Dissolution rates of plagioclase at pH = 2 and 3. American Mineralogist, 76, 211–217.Google Scholar
Casey, W.H., Banfield, J.F., Westrich, H.R. & McLaughlin, L. (1993) What do dissolution experiments tell us about natural weathering. Chemical Geology, 105, 1–15.CrossRefGoogle Scholar
Cho, H.D. & Mermut, A.R. (1992) Evidence for halloysite formation from weathering of ferruginous chlorite. Clays and Clay Minerals, 40, 608–619.Google Scholar
Chou, L. & Wollast, R. (1984) Study of the weathering of albite at room temperature and pressure with a fluidised bed reactor. Geochimica et Cosmochimica Acta, 48, 2205–2217.CrossRefGoogle Scholar
Chou, L. & Wollast, R. (1985) Study of the weathering of albite at room temperature and pressure with a fluidised bed reactor. Reply to a comment by Berner, R.A., Holdren, G.R. Jr. and Schott, J.. Geochimica et Cosmochimica Acta, 49, 1659–1660.Google Scholar
Churchman, G.J. (1978) Studies on a climax sequence in soils in tussock grasslands. Mineralogy. New Zealand Journal of Science, 21, 467–480.Google Scholar
Churchman, G.J. (1980) Clay minerals formed from micas and chlorites in some New Zealand soils. Clay Minerals, 15, 59–76.CrossRefGoogle Scholar
Cochran, M.F. & Berner, R.A. (1996) Promotion of chemical weathering by higher plants: field observations on Hawaiian basalts. Chemical Geology, 132, 71–77.Google Scholar
Coleman, N.T., Le Roux, F.H. & Cady, K.G. (1963) Biotite-hydrobiotite-vermiculite in soils. Nature, 198, 409–410.CrossRefGoogle Scholar
Delvigne, J.E. (1998) Atlas of Micromorphology of Mineral Alteration and Weathering. The Canadian Mineralogist, Special Publication No 3. Mineralogical Association of Canada, 495 pp.Google Scholar
Delvigne, J., Bisdom, E.B.A., Sleeman, J. & Stoops, G. (1979) Olivines, their pseudomorphs and secondary products. Pedologie, 29, 247–309.Google Scholar
Denison, I.A., Fry, W.H. & Gile, P.L. (1929) Alteration of muscovite and biotite in the soil. Technical Bulletin, No. 128. US Department of Agriculture, Washington, D.C.Google Scholar
De Kimpe, C. & Tardy, Y. (1968) Etude de l’altération d’une biotite en kaolinite par spectroscopie infrarouge. Bulletin de Groupe français des Argiles, 19, 81–85.Google Scholar
Dong, H., Peacor, D.R. & Murphy, S.F. (1998) TEM study of progressive alteration of igneous biotite to kaolinite throughout a weathered soil profile. Geochimica et Cosmochimica Acta, 62, 1881–1887.CrossRefGoogle Scholar
Drever, J.I. (1994) The effect of land plants on weathering rates of silicate minerals. Geochimica et Cosmochimica Acta, 58, 2325–2332.CrossRefGoogle Scholar
Drever, J.I. & Stillings, L.L. (1997) The role of organic acids in mineral weathering. Colloids and Surfaces. A. Physicochemical and Engineering Aspects, 120, 167–181.CrossRefGoogle Scholar
Eggleton, R.A. (1975) Nontronite topotaxial after hedenbergite. American Mineralogist, 60, 1063–1068.Google Scholar
Eggleton, R.A. (1984) Formation of iddingsite rims on olivine: a transmission electron microscope study. Clays and Clay Minerals, 32, 1–11.CrossRefGoogle Scholar
Eggleton, R.A. & Boland, J.N. (1982) Weathering of enstatite to talc through a sequence of transitional phases. Clays and Clay Minerals, 30, 11 –20.Google Scholar
Eggleton, R.A. & Buseck, P.R. (1980) High resolution electron microscopy of feldspar weathering. Clays and Clay Minerals, 28, 173–178.CrossRefGoogle Scholar
Eswaran, H. & Bin, W.C. (1978) A study of a deep weathering profile on granite in peninsular Malaysia. III. Alteration of feldspars. Soil Science Society of America Journal. 42, 154–158.Google Scholar
Eswaran, H. & Heng, Y.Y. (1976) The weathering of biotite in a profile on gneiss in Malaysia. Geoderma, 16, 9–20.CrossRefGoogle Scholar
Evans, L.J. & Adams, W.A. (1975) Chlorite and illite in some Lower Palaeozoic mudstones of Mid-Wales. Clay Minerals, 10, 387–397.CrossRefGoogle Scholar
Farmer, V.C. & Wilson, M.J. (1970) Experimental conversion of biotite to hydrobiotite. Nature, 226, 841–842.CrossRefGoogle ScholarPubMed
Farmer, V.C., Russell, J.D., McHardy, W.J., Newman, A.C.D., Ahlrichs, J.L. & Rimsaite, J.H.Y. (1971) Evidence for loss of protons and octahedral iron from oxidised biotites and vermiculites. Mineralogical Magazine, 38, 121–137.CrossRefGoogle Scholar
Fordham, A.W. (1990a) Formation of trioctahedral illite from biotite in a soil profile over granite gneiss. Clays and Clay Minerals, 38, 187–195.Google Scholar
Fordham, A.W. (1990b) Weathering of biotite into dioctahedral clay minerals. Clay Minerals, 25, 51–63.Google Scholar
Franke, W.A. & Teschner-Steinhardt, R. (1994) An experimental approach to the sequence of the stability of rock-forming minerals towards chemical stability. Catena, 21, 279–290.CrossRefGoogle Scholar
Ghabru, S.K., Mermut, A.R. & St Arnaud, R.J. (1990) Isolation and characterization of an iron-rich chlorite-like mineral from soil clays. Soil Science Society of America Journal, 54, 281–287.CrossRefGoogle Scholar
Gilkes, R.J. (1973) The alteration products of potassium depleted oxybiotite. Clays and Clay Minerals, 21, 301–313.CrossRefGoogle Scholar
Gilkes, R.J. & Little, I.P. (1972) Weathering of chlorite and some associations of trace elements in Permian phyllites in southeast Queensland. Geoderma, 7, 233–247.CrossRefGoogle Scholar
Gilkes, R.J. & Suddhiprakarn, A. (1979a) Biotite alteration in deeply weathered granite. I. Morphological, mineralogical and chemical properties. Clays and Clay Minerals, 27, 349–360.Google Scholar
Gilkes, R.J. & Suddhiprakarn, A. (1979b) Biotite alteration in deeply weathered granite. II. The oriented growth of secondary minerals. Clays and Clay Minerals, 27, 361–367.Google Scholar
Gilkes, R.J., Young, R.C. & Quirk, J.P. (1972) The oxidation of octahedral iron in biotite. Clays and Clay Minerals, 20, 303–315.CrossRefGoogle Scholar
Gilkes, R.J., Young, R.C. & Quirk, J.P. (1973a) Artificial weathering of oxidised biotite: I. Potassium removal by sodium chloride and sodium tetraphenylboron solutions. Soil Science Society of America Journal, 37, 25–28.Google Scholar
Gilkes, R.J., Young, R.C. & Quirk, J.P. (1973b) Artificial weathering of oxidised biotite: II. Rates of dissolu tion in 0.1, 0.01 and 0.001M HCl. Soil Science Society of America Journal, 37, 29–33.Google Scholar
Goldich, S.S. (1938) A study in rock weathering. Journal of Geology, 46, 17–58.CrossRefGoogle Scholar
Grandstaff, D.E. (1977) Some kinetics of bronzite orthopyroxene dissolution. Geochimica et Cosmochimica Acta, 41, 1097–1103.CrossRefGoogle Scholar
Grandstaff, D.E. (1978) Changes in surface area and morphology and the mechanism of forsterite dissolution. Geochimica et Cosmochimica Acta, 42, 1899–1901.CrossRefGoogle Scholar
Hamer, M., Graham, R.C., Amrhein, C. & Bozhilov, K.N. (2003) Dissolution of ripidolite (Mg,Fe-chlorite) in organic and inorganic acid solutions. Soil Science Society of America Journal, 67, 654–664.Google Scholar
Harris, W.G., Zelazny, L.W., Baker, J.C. & Martens, D.C. (1985a) Biotite kaolinization in Virginia Piedmont soils: I. Extent, profile trends and grain morphological effects. Soil Science Society of America Journal, 49, 1290–1297.Google Scholar
Harris, W.G., Zelazny, L.W. & Bloss, F.D. (1985b) Biotite kaolinization in Virginia Piedmont soils: II. Zonation in single grains. Soil Science Society of America Journal, 49, 1297–1302.Google Scholar
Herbillon, A.J. & Makubi, L. (1975) Weathering of chlorite in a soil derived from a chlorito-schist under humid tropical conditions. Geoderma, 13, 89–104.CrossRefGoogle Scholar
Hettelingh, J., Downing, R. & de Smet, P. (1991) Mapping critical loads for Europe. CCE Technical Report No. 1, RIVM. Report No. 259101001, Co-ordination Center for Effects, RIVM.Google Scholar
Hochella, M.F. & Banfield, J.F. (1996) Chemical weathering of silicates in nature: A microscopic perspective with theoretical considerations. Pp. 353–406 in: Chemical Weathering Rates in Silicate Minerals (White, A.F. and Brantley, S.L., editors). Reviews in Mineralogy 31, Mineralogical Society of America, Washington, D.C.Google Scholar
Hoffland, E., Giesler, R., Jongmans, T. & van Breemen, N. (2002) Increasing feldspar tunnelling by fungi across a north Sweden podzol chronosequence. Ecosystems, 5, 11–22.CrossRefGoogle Scholar
Holdren, G.R. & Berner, R.A. (1979) Mechanism of feldspar weathering–I. Experimental studies. Geochimica et Cosmochimica Acta, 43, 1161–1171.CrossRefGoogle Scholar
Holdren, G.R. and Speyer, P.M. (1985) Reaction ratesurface area relationships during the early stages of weathering. I. Initial observations. Geochimica et Cosmochimica Acta, 49, 675–681.CrossRefGoogle Scholar
Holdren, G.R., Casey, W.H., Westrich, H.R., Carr, M. & Bosclough, M. (1988) Bulk dislocation densities and dissolution rates in a calcic plagioclase feldspar. Chemical Geology, 70, 79.Google Scholar
Huang, W.H. & Keller, W.D. (1970) Dissolution of rockforming minerals in organic acids: Simulated first stage weathering of fresh mineral surfaces. American Mineralogist, 55, 2076–2094.Google Scholar
Huang, W.H. & Kiang, W.C. (1972) Laboratory dissolution of plagioclase in water and organic acids at room temperature. American Mineralogist, 57, 1849–1859.Google Scholar
Inskeep, W.P., Nater, E.A., Bloom, P.R., Vandervoort, D. & Erich, S.R. (1991) Characterization of laboratory weathered labradorite surfaces using X-ray photoelectron spectroscopy and transmission electron microscopy. Geochimica et Cosmochimica Acta, 55, 787–800.CrossRefGoogle Scholar
Ismail, F.T. (1969) Role of ferrous iron oxidation in the alteration of biotite and its effect on the type of clay minerals formed in soils of arid and humid regions. American Mineralogist, 54, 1460–1466.Google Scholar
Ismail, F.T. (1970) Biotite weathering and clay formation in arid and humid regions, California. Soil Science, 109, 257–261.CrossRefGoogle Scholar
Jenny, H. (1941) Factors of Soil Formation: A System of Quantitative Pedology. McGraw Hill, New York, 281 pp.CrossRefGoogle Scholar
Jeong, G.Y. (1998) Vermicular kaolinite epitactic on primary phyllosilicates in the weathering profile of anorthsite. Clays and Clay Minerals, 46, 509–520.Google Scholar
Jeong, G.Y. (2000) The dependence of localized crystallization of halloysite and kaolinite on primary minerals in the weathering profile of granite. Clays and Clay Minerals, 48, 196–203.CrossRefGoogle Scholar
Jeong, G.Y. & Kim, H.B. (2003) Mineralogy and chemistry of oxidized biotite in the weathering profile of granitic rocks. American Mineralogist, 88, 352–364.CrossRefGoogle Scholar
Johnson, L.J (1964) Occurrence of regularly interstratified chlorite vermiculite as a weathering product of chlorite in the soil. American Mineralogist, 49, 556–572.Google Scholar
Jolicoeur, S., Ildefonse Ph. & Bouchard, M. (2000) Kaolinite and gibbsite weathering of biotite within saprolites and soils of central Virginia. Soil Science Society of America Journal, 64, 1118–1129.CrossRefGoogle Scholar
Jones, D., Wilson, M.J. & Tait, J.M. (1980) Weathering of a basalt b. Pertusaria, corallina. The Lichenologist, 12, 277–289.Google Scholar
Jones, D., Wilson, M.J. and McHardy, W.J. (1981) Lichen weathering of rock-forming minerals: application of scanning electron microscopy and microprobe analysis. Journal of Microscopy, 124, 95–104.CrossRefGoogle Scholar
Jongmans, A.G., Van Breemen, N., Lundström, U.S., van Hees, P.A.W., Finlay, R.D., Srinivasam, N., Unestam, T., Giesler, R., Melkerud, P.-A. and Olsson, M. (1997) Rock-eating fungi. Nature, 289, 682–683.Google Scholar
Kalinowski, B.E. & Scheda, P. (1996) Kinetics of muscovite phlogopite and biotite dissolution and alteration at pH 1-4, room remperature. Geochimica et Cosmochimica Acta, 60, 367–385.CrossRefGoogle Scholar
Kapoor, B.S. (1972) Weathering of micaceous clays in some Norwegian podzols. Clay Minerals, 9, 383–394.CrossRefGoogle Scholar
Karathanasis, A.D. (1988) Compositional and solubility relationships between aluminum hydroxy-interlayered soil smectites and vermiculites. Soil Science Society of America Journal, 52, 1500–1508.CrossRefGoogle Scholar
Kato, Y. (1965) Mineralogical study of weathering products of granodiorite at Shinshiro City, Japan. III. Weathering of primary minerals. (2) Mineralogical characteristics of weathered mineral grains. Soil Science and Plant Nutrition, 11, 30–40.Google Scholar
Kawano, M. & Tomita, K. (1996) Amorphous aluminum hydroxide formed at the earliest weathering stages of K-feldspar. Clays and Clay Minerals, 44, 672–676.CrossRefGoogle Scholar
Kirby, S.H. & Wegner, M.W. (1978) Dislocation substructure of mantle-derived olivine as revealed by selective chemical etching and transmission electron microscopy. Physics and Chemistry of Minerals, 3, 309–330.CrossRefGoogle Scholar
Kodama, H., Schnitzer, M. & Jaakkimainen, M. (1983) Chlorite and biotite weathering by fulvic acid solutions in closed and open systems. Candian Journal of Soil Science, 63, 619–629.Google Scholar
Kretzschmar, R., Robarge, W.P., Amoozegar, A. & Veprskas, M.J. (1997) Biotite alteration to halloysite and kaolinite in soil-saprolite profiles developed from mica schist and granite gneiss. Geoderma, 75, 155–170.CrossRefGoogle Scholar
Landeweert, R., Hoffland, E., Finlay, R.D., Kuyper, T.W. & van Breemen, N. (2001) Linking plants to rocks: ectomucorrizhal fungi mobilize nutrients from minerals. Trends in Ecology and Evolution, 16, 248–254.CrossRefGoogle ScholarPubMed
Lee, M.R. & Parsons, I. (1995) Microtextural controls of weathering of perthitic alkali feldspars. Geochimica et Cosmochimica Acta, 59, 4465–4488.CrossRefGoogle Scholar
Lee, M.R. & Parsons, I. (1999) Biomechanical and biochemical weathering of lichen-encrusted granite: textural controls on organic-mineral interactions and deposition of silica-rich layers. Chemical Geology, 161, 385–397.CrossRefGoogle Scholar
Lee, M.R., Hodson, M.E. & Parsons, I. (1998) The role of intergranular microtextures and microstructures in chemical and mechanical weathering: direct comparisons of experimentally and naturally weathered alkali feldspars. Geochimica et Cosmochimica Acta, 62, 2771–2788.CrossRefGoogle Scholar
Leyval, C. & Berthelin, J. (1991) Weathering of mica by roots and rhizospheric microorganisms. Soil Science Society of America Journal, 55, 1009–1016.CrossRefGoogle Scholar
Luce, R.W., Bartlett, W.B. & Parks, G.A. (1972) Dissolution kinetics of magnesium silicates. Geochimica et Cosmochimica Acta, 36, 35–50.CrossRefGoogle Scholar
Locke, W.W. (1986) Rates of hornblende etching in soils on glacial deposits, Baffin Island, Canada. Pp. 129–145 in: Rates of Chemical Weathering of Rocks and Minerals (Colman, S.M. and Dethier, D.P., editors). Academic Press, London, New York.Google Scholar
MacEwan, D.M.C. (1954) “Cardenite’, a trioctahdral montmorillonoid derived from biotite. Clay Minerals Bulletin, 2, 120–126.Google Scholar
Makumbi, L. & Herbillon, A.K. (1972) Vermiculitisation experimentale d’une chlorite. Bulletin de Groupe français des Argiles, 24, 153–164.CrossRefGoogle Scholar
Malmström, M., Banwart, S., Lewenhagen, J., Duro, L. & Bruno, J. (1996) The dissolution of biotite and chlorite at 25 degrees C in the near neutral pH region. Journal of Contaminant Hydrology, 21, 201–213.CrossRefGoogle Scholar
Manley, E.P. & Evans, L.J. (1986) Dissolution of feldspars by low molecular weight aliphatic and aromatic acids. Soil Science, 141, 106–112.CrossRefGoogle Scholar
Martin, H.W. & Sparks, D.L. (1985) On the behaviour of non-exchangeable potassium in soils. Communications in Soil Science and Plant Analysis, 16, 133–162.CrossRefGoogle Scholar
Mast, M.A. & Drever, J.I. (1986) The effect of oxalate on the dissolution rates of oligoclase and tremolite. Geochimica et Cosmochimica Acta, 51, 2559–2568.Google Scholar
Martin-Garcia, J.M., Delgado, G., Sández Maronón, M., Párraga, J.F. & Delgado, R. (1997) Nature of dioctahedral micas in Spanish red soils. Clay Minerals, 32, 107–122.CrossRefGoogle Scholar
Mitsuda, T. (1960) Pseudomorphs of kaolinite after biotite. Studies on mechanism of weathering; 1st Report. Journal of the Faculty of Science, Hokkaido University, Series IV. Geology and Mineralogy, 10, 481–494.Google Scholar
Mogk, D.W. & Locke, W.W. III (1988) Application of Auger Electron Spectroscopy (AES) to naturally weathered hornblende. Geochimica et Cosmochimica Acta, 52, 2537–2542.CrossRefGoogle Scholar
Mojalalli, M. & Weed, S.B. (1978) Weathering of micas by mycorrizhal soybean plants. Soil Science Society of America Proceedings, 42, 367–372.CrossRefGoogle Scholar
Moon, H.S., Song, Y. & Lee, S.Y. (1994) Supergene vermiculitization of phlogopite and biotite in ultramafic and mafic rocks, central Korea. Clays and Clay Minerals, 42, 259–268.CrossRefGoogle Scholar
Mortland, M.M. & Lawton, K. (1961) Relationships between particle size and potassium release from biotite and its analogues. Soil Science Society of America Proceedings, 25, 473–476.CrossRefGoogle Scholar
Mortland, M.M., Lawton, K. & Uehara, G. (1956) Alteration of biotite to vermiculite by plant growth. Soil Science, 82, 477–481.CrossRefGoogle Scholar
Moulton, K.L., West, J. & Berner, R.A. (2000) Solute flux and mineral mass balances approaches to the quantification of plant effects on silicate weathering. American Journal of Science, 300, 539–570.CrossRefGoogle Scholar
Muir, I.J., Bancroft, M.G. & Nesbitt, H.W. (1989) Characteristics of altered labradorite surfaces by SIMS and XPS. Geochimica et Cosmochimica Acta, 53, 1235–1241.CrossRefGoogle Scholar
Muir, I.J., Bancroft, M.G., Shotyk & Nesbitt, H.W. (1990) A SIMS and XPS study of dissolving plagioclase. Geochimica et Cosmochimica Acta, 54, 2247–2256.CrossRefGoogle Scholar
Murakami, T., Isobe, H., Sato, T. & Ohnuki, T. (1996) Weathering of chlorite in a quartz-chlorite schist. I. Mineralogical and chemical changes. Clays and Clay Minerals, 44, 244–256.CrossRefGoogle Scholar
Nahon, D.B. & Colin, F. (1982) Chemical weathering of orthopyroxenes under lateritic conditions. American Journal of Science, 282, 1232–1245.CrossRefGoogle Scholar
Nahon, D., Colin, F. & Tardy, Y. (1982) Formation and distribution of Mg, Fe, Mn-smectites in the first stages of the lateritic weathering of forsterite and tephroite. Clay Minerals, 17, 339–348.CrossRefGoogle Scholar
Nesbitt, H.W. & Muir, I.J. (1988) SIMS depth profiles of weathered plagioclase and processes affecting dissolved Al and Si in some acidic soil solutions. Nature, 334, 336–338.CrossRefGoogle Scholar
Nesbitt, H.W., Macrae, N.D. & Shotyk, W. (1991) Congruent and incongruent dissolution of labradorite in dilute acidic salt solutions. Journal of Geology, 99, 429–442.CrossRefGoogle Scholar
Newman, A.C.D. (1969) Cation exchange properties of micas. I. The relation between mica composition and K-exchange in solutions of different pH. Journal of Soil Science, 20, 357–373.CrossRefGoogle Scholar
Newman, A.C.D. & Brown, G. (1966) Chemical changes during the alteration of micas. Clay Minerals, 6, 297–309.CrossRefGoogle Scholar
Nilsson, J. & Grennfelt, P. (1988) Critical Loads for Sulphur and Nitrogen. Nordic Council of Ministers. Nord. 1988, 15.Google Scholar
Norrish, K. (1973) Factors in the weathering of vermiculite. Proceedings of the International Clay Conference, Madrid (Serratosa, J.M., editor). CSIC, Madrid, pp. 419–432.Google Scholar
Nugent, M.A., Brantley, S.L., Pantano, C.G. & Maurice, P.A (1998) The influence of natural mineral coatings on feldspar weathering. Nature, 395, 588–591.CrossRefGoogle Scholar
Oxburgh, R., Drever, J.I. & Sun, Y.T. (1994) Mechanism of plagioclase dissolution in acid solution at 25°C. Geochimica et Cosmochimica Acta, 58, 661–669.CrossRefGoogle Scholar
Parham, W.P. (1969a) Halloysite-rich tropical weathering products of Hong Kong. Proceedings of the International Clay Conference, Tokyo I, 431–440.Google Scholar
Parham, W.P. (1969b) Formation of halloysite from feldspar: low temperature artificial weathering versus natural weathering. Clays and Clay Minerals, 17, 13–22.Google Scholar
Petit, J.C., Della Mea, G., Dran, J.C., Schott, J. & Berner, R.A. (1987) Mechanism of diopside dissolution from hydrogen depth profiling. Nature, 325, 705–707.CrossRefGoogle Scholar
Petrovic, R., Berner, R.A. & Goldhaber, M.B. (1976) Rate control in dissolution of alkali feldspars-I. Study of residual feldspar grains by X-ray photoelectron spectroscopy. Geochimica et Cosmochimica Acta, 40, 537–548.CrossRefGoogle Scholar
Pokrovsky, O.S. & Schott, J. (2000a) Forsteritic surface composition in aqueous solutions: A combined potentiometric, electrokinetic and spectroscopic approach. Geochimica et Cosmochimica Acta, 64, 3299–3312.Google Scholar
Pokrovsky, O.S. & Schott, J. (2000b) Kinetics and mechanism of forsterite dissolution at 25°C and pH from 1 to 12. Geochimica et Cosmochimica Acta, 64, 3313–3325.Google Scholar
Proust, D. (1982) Supergene alteration of hornblende in an amphibolite from Massif Central, France. Proceedings of the International Clay Conference, 1981 (van Olphen, H. and Veniale, F., editors), pp. 357-364.Google Scholar
Proust, D., Eymery, J.D. & Beaufort, D. (1986) Supergene vermiculitization of a magnesian chlorite; iron and magnesium removal processes. Clays and Clay Minerals, 34, 572–580.CrossRefGoogle Scholar
Prudêncao, M.I., Sequeira-Braga, M.A., Paquet, H., Warenborgh, J.C., Pereira, L.C.J. and Gouveia, M.A. (2002) Clay mineral assemblages in weathered basalt profiles from central and southern Portugal: Climatic significance. Catena, 49, 77–89.Google Scholar
Purvis, O.W. (1984) The occurrence of copper oxalate in lichens growing on copper sulphide-bearing rocks in Scandinavia. The Lichenologist, 16, 197–204.CrossRefGoogle Scholar
Raman, K.V. & Jackson, M.L. (1965) Mica surface morphology changes during weathering. Soil Science Society of America Proceedings, 29, 29–32.CrossRefGoogle Scholar
Rausell-Colom, J.A., Sweatman, T.R., Wells, C.B. & Norrish, K. (1964) Studies in the artificial weathering of mica. Pp. 40–72 in: Experimental Pedology. Butterworths, London.Google Scholar
Rebertus, R.A., Weed, S.B. & Buol, S.W. (1986) Transformations of biotite to kaolinite during saprolite-soil weathering. Soil Science Society of America Journal, 50, 810–819.CrossRefGoogle Scholar
Reed, M.G. & Scott, A.D. (1962) Chemical extraction of potassium from soils and micaceous minerals with solutions containing tetraphenyboron. II. Biotite. Soil Science Society of America Proceedings, 26, 41–45.Google Scholar
Reichenbach, H. Graf von & Rich, C.I. (1969) Potassium release from muscovite as influenced by particle size. Clays and Clay Minerals, 17, 23–29.Google Scholar
Robert, M., Hardy, M. & Elsass, F. (1991) Crystallochemistry, properties and organization of soil clays derived from major saedimentary rocks in France. Clay Minerals, 26, 409–420.CrossRefGoogle Scholar
Robertson, I.D.M. & Eggleton, R.A. (1991) Weathering of granitic muscovite to kaolinite and halloysite and of plagioclase-derived kaolinite to halloysite. Clays and Clay Minerals, 39, 113–126.CrossRefGoogle Scholar
Rodgers, G.P. & Holland, H.D. (1979) Weathering products in microcracks in feldspars. Geology, 7, 278–280.2.0.CO;2>CrossRefGoogle Scholar
Romero, R., Robert, M., Elsass, F. & Garcia, C. (1992) Evidence by transmission electron microscopy of weathering microsystems in soils developed from crystalline rocks. Clay Minerals, 27, 21–34.Google Scholar
Ross, G.J. (1968) Structural decomposition of an orthochlorite during its acid dissolution. The Canadian Mineralogist, 9, 522–530.Google Scholar
Ross, G.J. (1969) Acid dissolution of chlorites; release of magnesium, iron, aluminum and mode of acid attack. Clays and Clay Minerals, 17, 347–354.CrossRefGoogle Scholar
Ross, G.J. & Kodama, H. (1976) Experimental alteration of a chlorite into a regularly interstratified chloritevermiculite by chemical oxidation. Clays and Clay Minerals, 24, 183–190.CrossRefGoogle Scholar
Ross, G.J. & Kodama, H. (1976) Experimental transformation of a chlorite into a vermiculite. Clays and Clay Minerals, 22, 205–211.Google Scholar
Ross, G.J., Wang C, Ozkan, A.I. & Rees, H.W. (1982) Weathering of chlorite and mica in a New Brunswick podzol developed on till derived from chlorite-mica schist. Geoderma, 27, 255–267.CrossRefGoogle Scholar
Ruiz Cruz, M.D. (1999) New data for metamorphic vermiculite. European Journal of Mineralogy, 11, 533–548.Google Scholar
Schott, J. & Berner, R.A. (1983) X-ray photoelectron studies of the mechanism of iron silicate dissolution during weathering. Geochimica et Cosmochimica Acta, 47, 2233–2240.CrossRefGoogle Scholar
Schott, J., Berner, R.A. & Sjöberg, E.L. (1981) Mechanism of pyroxene and amphibole weathering. I. Experimental studies of iron-free minerals. Geochimica et Cosmochimica Acta, 45, 2123–2135.CrossRefGoogle Scholar
Schott, J., Brantley, S.L., Crerar, D., Guy C, Borcsik, M. & Willaime, C. (1989) Dissolution kinetics of strained calcite. Geochimica et Cosmochimica Acta, 53, 373–382.CrossRefGoogle Scholar
Scott, A.D. & Amonette, J. (1988) Role of iron in mica weathering. Pp. 537–623 in: Iron in Soils and Clay Minerals (Stucki, J.W., Goodman, B.A. and Schwertmann, U., editors). NATO ASI Series C: Mathematical and Physical Sciences. D. Reidel Publishing Company, Dordrecht, The Netherlands.Google Scholar
Scott, A.D. and Smith, S.J. (1966) Susceptibility of interlayer potassium in micas to exchange with sodium. Clays and Clay Minerals, 14, 69–81.CrossRefGoogle Scholar
Senkayi, A.L., Dixon, J.B. & Hossner, J.R. (1981) Transformation of chlorite to smectite through regularly interstratified intermediates. Soil Science Society of America Journal, 45, 650–656.CrossRefGoogle Scholar
Shau, Y.H., Peacor, D.R. & Essene, E.J. (1990) Corrensite and mixed layer chlorite corrensite in metabasalt from northern Taiwan; TEM, AEM EMPA, XRD and optical studies. Contributions to Mineralogy and Petrology, 105, 123–142.CrossRefGoogle Scholar
Siever, R. & Woodford, N. (1979) Dissolution kinetics and the weathering of mafic minerals. Geochimica et Cosmochimica Acta, 43, 717–724.CrossRefGoogle Scholar
Singh, B. & Gilkes, R.J. (1991) Weathering of a chromium muscovite to kaolinite. Clays and Clay Minerals, 39, 571–579.CrossRefGoogle Scholar
Singh, B. & Gilkes, R.J. (1993) Weathering of spodumene to smectite in a lateritic environment. Clays and Clay Minerals, 41, 624–630.CrossRefGoogle Scholar
Smith, K.L., Milnes, A.R. & Eggleton, R.A. (1987) Weathering of basalt, formation of iddingsite. Clays and Clay Minerals, 36, 418–428.Google Scholar
Spyridakis, D.E., Chesters, G. & Wilde, S.A. (1967) Kaolinisation of biotite as a result of coniferous and deciduous seedling growth. Soil Science Society of America Proceedings, 31, 203–210.CrossRefGoogle Scholar
Stillings, L.L. & Brantley, S.L. (1995) Feldspar dissolution at 25°C and pH 3: Reaction stoichiometry and the effect of cations. Geochimica et Cosmochimica Acta, 59, 1483–1496.CrossRefGoogle Scholar
Stillings, L.L., Drever, J.I., Brantley, S.L., Sun, Y. & Oxburgh, R. (1996) Rates of feldspar dissolution at pH 3–7 with 0–8 mM oxalic acid. Chemical Geology, 132, 79–89.CrossRefGoogle Scholar
Sverdrup, H. & Warfvinge, P. (1990) The role of weathering and forestry in determining the acidity of lakes in Sweden. Water, Air and Soil Pollution, 52, 71–78.CrossRefGoogle Scholar
Sverdrup, H. de Vries, W. & Henriksen, A. (1990) Mapping critical loads. Miljørapport 1990, 14. Nordic Council of Ministers, Copenhagen.Google Scholar
Sverdrup, H., Warfvinge, P. & Nihlga rd, B. (1994) Assessment of soil acidification effects on forest growth in Sweden. Water, Air and Soil Pollution, 78, 1–36.CrossRefGoogle Scholar
Tazaki, K. (1976) Scanning electron microscopic study of formation of gibbsite from plagioclase. Papers of the Institute for Thermal Springs Research, No 45, 11–24.Google Scholar
Tazaki, K. & Fyfe, W.S. (1987) Primitive clay precursors formed on feldspar. Canadian Journal of Earth Sciences, 24, 506–527.CrossRefGoogle Scholar
Teng, H.H. (2004) Controls by saturation state on etch pit formation during calcite dissolution. Geochimica et Cosmochimica Acta, 68, 253–262.CrossRefGoogle Scholar
Teng, H.H., Fenter, P., Cheng, L. & Sturchio, N.C. (2001) Resolving orthoclase dissolution processes with atomic force microscopy and X-ray reflectivity. Geochimica et Cosmochimica Acta, 65, 3459–3474.CrossRefGoogle Scholar
Tomita, K. (1977) Experimental transformation of 2M sericite into a rectorite-type mixed-layer mineral by treatment with various salts. Clays and Clay Minerals, 25, 302–308.CrossRefGoogle Scholar
Tsuzuki, Y., Nagasawa, K. & Isobe, K. (1968) Weathered biotite from Matsusaka, central Japan. Mineralogical Journal, 5, 365–382.CrossRefGoogle Scholar
Turpault, M.P. & Trotignon, L. (1994) The dissolution of biotite single crystals in dilute HNO3 at 24°C; Evidence of an anisotropic corrosion process of micas in acidic solutions. Geochimica et Cosmochimica Acta, 58, 2761–2775.CrossRefGoogle Scholar
Van Breemen, N., Finlay, R.D., Lundström, U.S., Jongmans, A.G., Giesler, R. & Melkerud, P.-A. (2000) Mycorrhizal weathering: a true case of mineral plant nutrition. Biogeochemistry, 49, 53–67.CrossRefGoogle Scholar
Van Hees, P.A.W., Lundström, U.S. & Mörth CM. (2002) Dissolution of microcline and labradorite in a forest O horizon extract: the effect of naturally occurring organic acids. Chemical Geology, 189, 199–211.CrossRefGoogle Scholar
Varadachari, C., Barman, A.K. & Ghosh, K. (1994) Weathering of silicate minerals by organic acids. II Nature of residual products. Geoderma, 61, 251–268.CrossRefGoogle Scholar
Velbel, M.A. (1985) Geochemical mass balances and weathering rates in forested watersheds of the southern Blue Ridge. American Journal of Science, 285, 904–930.CrossRefGoogle Scholar
Velbel, M.A. (1989) Weathering of hornblende to ferruginous products by a dissolution-reprecipitation mechanism: petrography and stoichiometry. Clays and Clay Minerals, 37, 515–524.CrossRefGoogle Scholar
Violante, P. & Wilson, M.J. (1983) Mineralogy of some Italian Andosols with special reference to the origin of the clay fraction. Geoderma, 29, 157–174.CrossRefGoogle Scholar
Walker, G.F. (1949) The decomposition of biotite in the soil. Mineralogical Magazine, 28, 693–703.Google Scholar
Walker, J.C.G., Hays, P.B. & Kasting, J.F. (1981) A negative feedback mechanism for the long-term stabilisation of the Earth's surface temperature. Journal of Geophysical Research, 86, 9776–9782.CrossRefGoogle Scholar
Wallander, H. (2000) Use of strontium isotopes and foliar K content to estimate weathering of biotite induced by pine seedlings colonised by ectomycorrhizal fungi from two different soils. Plant and Soil, 222, 215–219.CrossRefGoogle Scholar
Wallander, H. & Wickman, T. (1999) Biotite and microcline as potassium sources in ectomycorrhizal and non-mycorrhizal Pinus sylvestris seedlings. Mycorrhiza, 9, 25–32.CrossRefGoogle Scholar
Weed, S.B., Davey, C.B. & Cook, M.G. (1969) Weathering of micas by fungi. Soil Science Society of America Proceedings, 33, 702–706.CrossRefGoogle Scholar
Welch, S.S. & Ullman, W.J. (1993) The effect of organic acids on plagioclase dissolution rates and stoichiometry. Geochimica et Cosmochimica Acta, 57, 2725–2737.CrossRefGoogle Scholar
Welch, S.A. & Banfield, J.F. (2002) Modification of olivine surface morphology and reactivity by microbial activity during microbial weathering. Geochimica et Cosmochimica Acta, 66, 213–221.CrossRefGoogle Scholar
Welch, S.A., Barker, W.W. & Banfield, J.F. (1999) Microbial extracellular polysaccharides and plagioclase dissolution. Geochimica et Cosmochimica Acta, 63, 1405–1419.CrossRefGoogle Scholar
Wilson, M.J. (1966) The weathering of biotite in some Aberdeenshire soils. Mineralogical Magazine, 35, 1080–1093.Google Scholar
Wilson, M.J. (1969) A gibbsitic soil derived from the weathering of an ultrabasic rock on the island of Rhum. Scottish Journal of Geology, 5, 81–89.CrossRefGoogle Scholar
Wilson, M.J. (1970) A study of rock weathering in a soil derived from a biotite-hornblende rock. I. Weathering of biotite. Clay Minerals, 8, 291–303.Google Scholar
Wilson, M.J. (1975) Chemical weathering of some primary rock-forming minerals. Soil Science, 119, 349–345.CrossRefGoogle Scholar
Wilson, M.J. (2004) Weathering of rocks by lichens with special reference to stonework: a review. Land Reconstruction and Management, 3, 51–60.Google Scholar
Wilson, M.J. & Duthie, D.M.L. (1981) Some aspects of interstratal alteration of biotite in Old Red Sandstone. Scottish Journal of Geology, 17, 65–72.CrossRefGoogle Scholar
Wilson, M.J. & Farmer, V.C. (1970) A study of weathering in a soil derived from a biotite-hornblende rock. II Weathering of hornblende. Clay Minerals, 8, 435–444.Google Scholar
Wilson, M.J. & Jones, D. (1983) Lichen weathering of minerals: Implications for pedogenesis. In “Residual Deposits: Surface Related Weathering Processes and Materials.” Special issue of the Journal of the Geological Society, 5–12.Google Scholar
Wilson, M.J. & Jones, D. (1984) The occurrence and significance of manganese oxalate in Pertusaria corallina (Lichenes). Pedobiologia, 26, 373–379.CrossRefGoogle Scholar
Wilson, M.J. & McHardy, W.J. (1980) Experimental etching of a microcline-perthite and implications concerning natural weathering. Journal of Microscopy, 120, 291–302.CrossRefGoogle Scholar
Wilson, M.J., Bain, D.C. & McHardy, W.J. (1971) Clay mineral formation in a deeply weathered boulder conglomerate in north east Scotland. Clays and Clay Minerals, 19, 345–352.CrossRefGoogle Scholar
Wilson, M.J., Jones, D. & McHardy, W.J. (1981) The weathering of serpentinite b. Lecanora atra. The Lichenologist, 13, 167–176.Google Scholar
Wollast, R. (1967) Kinetics of the alteration of Kfeldspar in buffered solutions at low temperature. Geochimica et Cosmochimica Acta, 31, 635–548.CrossRefGoogle Scholar
Zhang, H., Bloom, P.R. & Nater, E.A. (1993) Change in surface area and dissolution rates during hornblende dissolution at pH 4.0. Geochimica et Cosmochimica Acta, 57, 1681–1689.Google Scholar