Hostname: page-component-cd9895bd7-mkpzs Total loading time: 0 Render date: 2024-12-23T19:17:17.814Z Has data issue: false hasContentIssue false
  • English
  • Français

On the compositional variability of dalyite, K2ZrSi6O15: a new occurrence from Terceira, Azores

Published online by Cambridge University Press:  02 January 2018

A. J. Jeffery ,
R. Gertisser ,
R. A. Jackson ,
B. O'Driscoll  and
A. Kronz
A. J. Jeffery*
Affiliation:
School of Physical and Geographical Sciences, Keele University, Keele, Staffordshire ST5 5BG, UK
R. Gertisser
Affiliation:
School of Physical and Geographical Sciences, Keele University, Keele, Staffordshire ST5 5BG, UK
R. A. Jackson
Affiliation:
School of Physical and Geographical Sciences, Keele University, Keele, Staffordshire ST5 5BG, UK
B. O'Driscoll
Affiliation:
School of Physical and Geographical Sciences, Keele University, Keele, Staffordshire ST5 5BG, UK School of Earth, Atmospheric and Environmental Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, UK
A. Kronz
Affiliation:
Geowissenschaftliches Zentrum Göttingen, Goldschmidtstrasse 3, D-37077 Göttingen, Germany
*
*E-mail: [email protected]
Get access Rights & Permissions [Opens in a new window]

Abstract

The rare potassium zirconium silicate dalyite has been identified for the first time on Terceira, Azores, within syenitic ejecta of the Caldeira-Castelinho Ignimbrite Formation. New quantitative analyses of this dalyite were combined with the small number of published analyses from various locations worldwide to evaluate the mineral's compositional variability. Additionally, solid-state modelling has been applied to assess the site allocations of substituting elements. The new analyses yield the average formula (K1.84Na0.15)∑=1.99(Zr0.94Ti0.012Hf0.011Fe0.004)∑=0.967Si6.03O15. Model results predict the placement of substituting Hf and Ti in the octahedral site, and highlight the overall complexity in the incorporation of Fe, Mg and Ba. The combined dataset reveals that dalyite found within peralkaline granites and syenites is generally defined by higher Na↔K substitution and lower Ti↔Zr substitution relative to dalyite from highly potassic rocks. The Terceira dalyite exhibits a bimodal variation in the degree of Na↔K substitution which is attributed to a K-enrichment trend induced by late-stage pore wall crystallization and albitization, coupled with the control of pore size upon the degree of supersaturation required to initiate nucleation of dalyite in pores of varying size.

Keywords

dalyiteperalkalinesyeniteoceanic island magmatismTerceiraAzores
Type
Research Article
Information
Mineralogical Magazine , Volume 80 , Issue 4 , June 2016 , pp. 547 - 565
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2016

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Akhtar, M.J. and Waseem, S. (2001) Atomistic simulation studies of zircon. Chemical Physics, 11 A, 109—120.Google Scholar
Andersen, T, Erambert, M., Larsen, A.O. and Selbekk, R.S. (2010) Petrology of nepheline syenite pegmatites in the Oslo Rift, Norway: zirconium silicate mineral assemblages as indicators of alkalinity and volatile fugacity in mildly agpaitic magma. Journal of Petrology, 51, 2303–2325.CrossRefGoogle Scholar
Armstrong, I.T. (1995) CITZAF: a package of correction programs for the quantitative electron microbeam X-ray analysis of thick polished materials, thin films, and particles. Microbeam Analysis, 4, 177—200.Google Scholar
Bigg, E.K. (1953) The supercooling of water. Proceedings of the Physical Society (London), 66B, 688–694.CrossRefGoogle Scholar
Birkett, T.C., Miller, R.R., Roberts, A.C. and Mariano, A.N. (1992) Zirconium-bearing minerals of the Strange Lake Intrusive Complex, Quebec-Labrador. The Canadian Mineralogist, 30, 191–205.Google Scholar
Borley, G.D. (1963) Amphiboles from the Younger Granites of Nigeria. I. Chemical classification. Mineralogical Magazine, 33, 358—376.Google Scholar
Brenan, J.M., Neroda, E., Lundstrom, C.C., Shaw, H.F., Ryerson, F.J. and Phinney, D.L. (1998) Behaviour of boron, beryllium, and lithium during melting and crystallization: constraints from mineral-melt parti-tioning experiments. Geochimica et Cosmochimica Ada, 62, 2129–2141.CrossRefGoogle Scholar
Brod, J.A. (1999) Petrology and geochemistry of the Tapira alkaline complex, Minas Gerais state, Brazil., PhD thesis, Durham University, UK, 486.ppGoogle Scholar
Cann, J.R. (1967) A second occurrence of dalyite and the petrology of some ejected syenite blocks from Sao Miguel, Azores. Mineralogical Magazine, 36, 227–232.CrossRefGoogle Scholar
Chakhmouradian, A.R. and Mitchell, R.H. (2002) The mineralogy of Ba- and Zr-rich alkaline pegmatites from Gordon Butte, Crazy Mountains (Montanaa, USA): comparisons between potassic and sodic agpaitic pegmatites. Contributions to Mineralogy and Petrology, 143, 93–114.CrossRefGoogle Scholar
Dolivo-Dobrovol'skiy, D.Y. and Yevdokimov, M.D. (1991) Zirconium mineralisation of the alkali metaso-matites of the Murun Complex. International Geology Review, 33, 490–496.CrossRefGoogle Scholar
Fleet, S.G. (1965) The crystal structure of dalyite. Zeitschrift fur Kristallographie, 121, 349–368.CrossRefGoogle Scholar
Fumes, P.L, Mitchell, J.G., Robins, B., Ryan, P. and Skjerlie, F.J. (1982) Petrography and geochemistry of peralkaline, ultrapotassic syenite dykes of Middle Permian age, Sunnfjord, West Norway. Norsk Geologisk Tidsskrift, 62, 147–159.Google Scholar
Gale, J.D. (1997) GULP: A computer program for the symmetry-adapted simulation of solids. Journal of the Chemical Society, Faraday Transactions, 93, 629—637.CrossRefGoogle Scholar
Gente, P., Dyment, I, Maia, M. and Goslin, J. (2003) Interaction between the Mid-Atlantic Ridge and the Azores hot spot during the last 85 Myr: emplacement and rifting of the hotspot derived plateaus. Geochemistry, Geophysics, Geosystems, 4, doi: 10.1029/2003GC000527.CrossRefGoogle Scholar
Gertisser, R., Self, S., Gaspar, J.L., Kelley, S.P., Pimentel, A., Eikenberg, J., Barry, T.L., Pacheco, J.M., Queiroz, G. and Vespa, M. (2010) Ignimbrite stratigraphy and chronology on Terceira Island, Azores. The Geological Society of America, Special Paper, 464, 133–154.Google Scholar
Harris, C. and Rickard, R.S. (1987) Rare-earth-rich eudialyte and dalyite from a peralkaline granite dyke at Straumsvola, Dronning Maud Land, Antarctica. The Canadian Mineralogist, 25, 755—762.Google Scholar
Harris, C, Cressey, G., Bell, J.D., Atkins, F.B. and Beswetherick, S. (1982) An occurrence of rare-earth-rich eudialyte from Ascension Island, South Atlantic. Mineralogical Magazine, 46, 421—425.CrossRefGoogle Scholar
Hawthorne, F.C., Oberti, R., Ottolini, L. and Foord, E.E. (1996) Lithium-bearing fluor-arfvedsonite from Hurricane Mountain, New Hampshire: a crystal-chemical study. The Canadian Mineralogist, 34, 1015–1019.Google Scholar
Hawthorne, F.C., Oberti, R., Cannillo, E., Ottolini, L., Roelofsen, IN. and Martin, R.F. (2001) Li-bearing arfvedsonitic amphiboles from the Strange Lake peralkaline granite, Quebec. The Canadian Mineralogist, 39, 1161–1170.CrossRefGoogle Scholar
Holness, M.B. and Sawyer, E.W. (2008) On the pseudomorphing of melt-filled pores during crystallization of migmatites. Journal of Petrology, 49, 1343–1363.CrossRefGoogle Scholar
Holness, M.B., Anderson, A.T., Martin, VM, Maclennan, J., Passmore, E. and Schwindinger, K. (2007) Textures in partially solidified crystalline nodules: a window into the pore structure of slowly cooled mafic intrusions. Journal of Petrology, 48, 1243—1264.CrossRefGoogle Scholar
Jeffery, A.J. (2016) Petrogenesis and contrasting eruption styles of peralkaline silicic magmas from Terceira and Sao Miguel, Azores., Unpublished PhD thesis, Keele University, UK Google Scholar
Khomyakov, A.P. (1995) Mineralogy of Hyperagpaitic Alkaline Rocks., Oxford Science Publications, Oxford, UK, 222.ppGoogle Scholar
Konev, A.A., Vorob'ev, E.I. and Lasebnik, LA. (1996) The Mineralogy of the Murun Alkaline Massif., Siberian Branch of the Russian Academy, Scientific Press, Novosibirsk [in Russian] Google Scholar
Krause, D.C. and Watkins, N.D. (1970) North Atlantic crustal genesis in the vicinity of the Azores. Geophysical Journal of the Royal Astronomical Society, 19, 261–283.CrossRefGoogle Scholar
Kroger, F.A. and Vink, H.J. (1956) Relations between the concentrations of imperfections in crystalline solids. Solid State Physics, 3, 307–435.CrossRefGoogle Scholar
Lazebnik, L.A. and Makhotko, V.F. (1982) Dalyite, the first finding in the USSR. Zapiski Vsesoyuznogo Mineralogicheskogo Obschestva, 111, 587—593.Google Scholar
Lee, M.R. and Parsons, I. (1997) Dislocation formation and albitization in alkali feldspars from the Shap granite. American Mineralogist, 82, 557—570.CrossRefGoogle Scholar
Linthout, K., Nobel, F.A. and Lustenhouwer, W.J. (1988) First occurrence of dalyite in extrusive rock. Mineralogical Magazine, 52, 705—708.CrossRefGoogle Scholar
Mariano, A.N. and Francis, C.A. (1989) Dalyite from fenites in carbonatite complexes of the Minas Gerais — Goias belt, Brazil. Geological Society of America Abstract Programs, 21, A46.Google Scholar
Mariano, A.N. and Marchetto, M. (1991) Serra Negra and Salitre - carbonatite alkaline igneous complex. Pp. 75-79 in: 5th International Kimberlite Conference (Field Guide Book), (O.H. Leonardos, H.O.A.. Meyer and J.C. Gaspar, editors). Araxa, Brazil , CPRM, Special publication, 3/91 Google Scholar
Marks, M.A.W.., Hettmann, K, Schilling, J., Frost, B.R. and Markl, G. (2011) The mineralogical diversity of alkaline igneous rocks: critical factors for the transition from miaskitic to agpaitic phase assemblages. Journal of Petrology, 52, 439–455.CrossRefGoogle Scholar
Melia, T.P. and Moffitt, W.P. (1964) Crystallisation from aqueous solution. Journal of Colloid Science, 19, 433–47.CrossRefGoogle Scholar
Mitchell, R.H. and Bergman, S.C. (1991) Petrology of Lamproites., Plenum Press, New York/Londo 447.pp.CrossRefGoogle Scholar
Mujaji, M., Burrows J. and Jackson, R.A. (2014) Optical spectroscopy of the Nd3+ and Nd3+ - Gd3+/Yb3+centres in BaF2 single crystals and calculations on lanthanide-doped BaF2 . Journal of Luminescence, 151, 106–110.CrossRefGoogle Scholar
Putnis, A. and Mauthe, G. (2001) The effect of pore size on cementation in porous rocks. Geofluids, 1, 37—41.CrossRefGoogle Scholar
Putnis, A., Prieto, M. and Fernandez-Diaz, L. (1995) Supersaturation and crystallisation in porous media. Geological Magazine, 132, 1—13.CrossRefGoogle Scholar
Raade, G. and Mladeck, M.H. (1983) Janhaugite, Na3Mn3Ti2Si4Oi5(OH,F,O)3, a new mineral from Norway. American Mineralogist, 68, 1216—1219.Google Scholar
Reguir, E. (2001) Aspects of the mineralogy of the Murun alkaline complex, Yakutia, Russia., MSc thesis, Lakehead University, Canad 193.pp.Google Scholar
Ridolfi, F, Renzulli, A., Santi, P. and Upton, B.G.J. (2003) Evolutionary stages of crystallization of weakly peralkaline syenites: evidence from ejecta in the plinian deposits of Agua de Pau volcano (Sao Miguel, Azores Islands). Mineralogical Magazine, 67, 749–767.CrossRefGoogle Scholar
Robins, B., Fumes, H. and Ryan, P. (1983) A new occurrence of dalyite. Mineralogical Magazine, 47, 93–94.CrossRefGoogle Scholar
Saleh, G.M. (2006) Geologic relationships and mineralisation of peralkaline/alkaline granite-syenite of the Zargat Na'am ring complex, Southeastern Desert, Egypt. Chinese Journal of Geochemistry, 25, 97—111.CrossRefGoogle Scholar
Salvi, S. and Williams-Jones, A.E. (1995) Zirconosilicate phase relations in the Strange Lake (Lac Brisson) pluton, Quebec-Labrador, Canada. American Mineralogist, 80, 1031–1040.CrossRefGoogle Scholar
Salvioli-Mariani, E. and Venturelli, G. (1996) Temperature of crystallisation and evolution of the Jumilla and Cancarix lamproites (SE Spain) as suggested by melt and solid inclusions in minerals. European Journal of Mineralogy, 8, 1027—1039.CrossRefGoogle Scholar
Scherer, G.W. (1999) Crystallization in pores. Cement and Concrete Research, 29, 1347–1358.CrossRefGoogle Scholar
Schmitt, A.K., Emmermann, R., Trumbull, R.B., Buhn, B. and Henjes-Kunst, F (2000) Petrogenesis and 40Ar/39Ar geochronology of the Brandberg Complex, Namibia: evidence for a major mantle contribution in metaluminous and peralkaline granites. Journal of Petrology, 41, 1207–1239.CrossRefGoogle Scholar
Self, S. (1974) Recent volcanism on Terceira, Azores., PhD thesis, Imperial College, UK 236.pp.Google Scholar
Self, S. (1976) The recent volcanology of Terceira, Azores. Journal of the Geological Society, 132, 645–666.CrossRefGoogle Scholar
Stepnova, Y.A., Zalishchak, B.L. and Pakhomova, V.A. (2013) Rare-earth mineralisation of alkali magma of the Russian Far East: on the example of the Shibanovsky massif. Геология, Вестник, 3, 44-51.[in Russian].Google Scholar
Van Tassel, R. (1952) Dalyite, a new potassium zirconium silicate, from Ascension Island, Atlantic. Mineralogical Magazine, 29, 850-857.Google Scholar
Venturelli, G., Capedri, S., Di Battistini, G., Crawford, A., Kogarko, L.N. and Celestini, S. (1984) The ultrapotassic rocks from southeastern Spain. Lithos, 17, 37–54.CrossRefGoogle Scholar
Widom, E., Gill, J.B. and Schmincke, H.-U. (1993) Syenite nodules as a long-term record of magmatic activity in Agua de Pau volcano, São Miguel, Azores. Journal of Petrology, 34, 929–953.CrossRefGoogle Scholar