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Photography
Dalyite
from
Portugal
Dalyite
Água de Pau Volcano, São Miguel, Azores, Portugal
Dalyite
Água de Pau Volcano, São Miguel, Azores, Portugal
Dalyite
Água de Pau Volcano, São Miguel, Azores, Portugal
Dalyite
Água de Pau Volcano, São Miguel, Azores, Portugal
Dalyite
Água de Pau Volcano, São Miguel, Azores, Portugal
Dalyite
Água de Pau Volcano, São Miguel, Azores, Portugal
Dalyite
Água de Pau Volcano, São Miguel, Azores, Portugal
Dalyite
Água de Pau Volcano, São Miguel, Azores, Portugal
Dalyite
Água de Pau Volcano, São Miguel, Azores, Portugal
Dalyite
Água de Pau Volcano, São Miguel, Azores, Portugal
Dalyite
Água de Pau Volcano, São Miguel, Azores, Portugal
Dalyite
Água de Pau Volcano, São Miguel, Azores, Portugal
Portugal
Azores
ⓘ
São Miguel
Woolley, Alan R. (2019)
Alkaline Rocks and Carbonatites of the World. Part 4: Antarctica, Asia and Europe (excluding the former USSR), Australasia and Oceanic Islands
. The Geological Society of London.
doi:10.1144/mpar4
Larrea, P., França, Z., Widom, E., & Lago, M. (2018). Petrology of the Azores Islands. In Volcanoes of the Azores (pp. 197-249). Springer, Berlin, Heidelberg.
Gaspar, J. L., Guest, J. E., Duncan, A. M., Barriga, F. J. A. S., & Chester, D. K. (Eds.). (2015, October). Volcanic Geology of São Miguel Island (Azores Archipelago). Geological Society of London, 44. doi.org/10.1144/M44.1
Elliott, T., Blichert-Toft, J., Heumann, A., Koetsier, G., & Forjaz, V. (2007). The origin of enriched mantle beneath São Miguel, Azores. Geochimica et Cosmochimica Acta, 71(1), 219-240. doi.org/10.1016/j.gca.2006.07.043
Beier, C., Haase, K. M., & Hansteen, T. H. (2006). Magma evolution of the Sete Cidades volcano, São Miguel, Azores. Journal of Petrology, 47(7), 1375-1411. doi.org/10.1093/petrology/egl014
Snyder, D. C., Widom, E., Pietruszka, A. J., & Carlson, R. W. (2004). The role of open-system processes in the development of silicic magma chambers: a chemical and isotopic investigation of the Fogo A trachyte deposit, São Miguel, Azores. Journal of Petrology, 45(4), 723-738. doi.org/10.1093/petrology/egg104
Ridolfi, F., Renzulli, A., Santi, P., & 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 (São Miguel, Azores Islands). Mineralogical Magazine, 67(4), 749-767. doi.org/10.1180/0026461036740131
Renzulli, A., & Santi, P. (2000). Two-stage fractionation history of the alkali basalt-trachyte series of Sete Cidades volcano (São Miguel Island, Azores). European Journal of Mineralogy, 12(2), 469-494.
Mattiolil, M., Upton, B. G. J., & Renzulli, A. (1997). Sub-volcanic crystallization at Sete Cidades volcano, São Miguel, Azores, inferred from mafic and ultramafic plutonic nodules. Mineralogy and Petrology, 60(1-2), 1-26. doi.org/10.1007/BF01163132
Widom, E., Carlson, R. W., Gill, J. B., & Schmincke, H. U. (1997). Th–Sr–Nd–Pb isotope and trace element evidence for the origin of the Sao Miguel, Azores, enriched mantle source. Chemical Geology, 140(1-2), 49-68. doi.org/10.1016/S0009-2541(97)00041-7
ⓘ
Água de Pau Volcano
Ridolfi, F., Renzulli, A., Santi, P., Upton, B. G. J. (2003): Evolutionary stages of crystallisation of weakly peralkaline syenites: evidence from ejecta in the plinian deposits of Agua de Pau volcano (São Miguel, Azores Islands). Mineralogical Magazine, 67, 749-767.
Widom, E., Gill, J. B., 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
Cann, J. R. (1967) A second occurrence of dalyite and the petrology of some ejected syenite blocks from São Miguel, Azores.
Mineralogical Magazine and Journal of the Mineralogical Society
, 36 (278) 227-232
doi:10.1180/minmag.1967.036.278.05
Ribeira Grande
ⓘ
Pumice quarry
Pedro Alves collection and analytical data.
ⓘ
Ruins of Lombadas syenite xenolith occurrence
Knut Edvard Larsen collection, july 2019 (identified by UV-light)
Knut Edvard Larsen collection 2019
Terceira
Angra do Heroísmo
ⓘ
Caldeira-Castelinho Ignimbrite Formation
Jeffery, A.J., Gertisser, R., Jackson, R.A., O'Driscoll, B., Kronz, A. (2016): On the compositional variability of dalyite, K2ZrSi6O15: a new occurrence from Terceira, Azores. Mineralogical Magazine, 80, 547-565.
Mineral
and/or Locality
Água de Pau Volcano, São Miguel, Azores, Portugal