 | | Journal (article/letter/editorial) | | which have only 5–10 wt% K2O. Keywords: fenite, carbonatite, sodic metasomatism, potassic metasomatism, K-feldspar...(Traduit par la Rédaction) Mots-clés: fénite, carbonatite, métasomatose sodique, métasomatose potassique...understood to be “alkali silicate and associated carbonatite igneous activity”. Although a side issue from...descent relationship between silicate magma and carbonatite magma”, and therefore the word § E-mail address:...within 20 km of each other; each has coexisting carbonatite and nephelinite. In this contribution, I consider |  | | Book | | GeoGuide Peter Kresten Valentin R. Troll The Alnö Carbonatite Complex, Central Sweden GeoGuide Series editors... Peter Kresten Valentin R. Troll • The Alnö Carbonatite Complex, Central Sweden 123 Peter Kresten...works where a magmatic origin was proposed for carbonatite—alkaline silicate rock associations focused on...Archaean to the present. The only currently active carbonatite volcano, Oldoinyo Lengai (Fig. 1a) in the East...northern Tanzania, stands out from the other carbonatite occurrences in the world because of its unusually |  | | Journal (article/letter/editorial) | | island of São Vicente has the most abundant carbonatite outcrops in the Cape Verde Islands. A field survey...extrusive carbonatites, carbonatite dykes and small apophyses of intrusive carbonatite. These outcrops are...nephelinite crystallization and high-temperature carbonatite immiscibility. The carbonatitic melts crystallized...1993). São Vicente has the greatest number of carbonatite exposures (Gerlach et al., 1988), including calcitic...they must also be studied to fully understand carbonatite genesis. In this work we present field, petrographic |  | Dolníček, Zdeněk, Kropáč, Kamil, Uher, Pavel, Polách, Martin (2010) Mineralogical and geochemical evidence for multi-stage origin of mineral veins hosted by teschenites at Tichá, Outer Western Carpathians, Czech Republic. Geochemistry, 70 (3) 267-282 doi:10.1016/j.chemer.2010.03.003 | Journal (article/letter/editorial) | | first stage is composed of titanite, aegirine-augite to aegirine, annite, analcime and strontian apatite...390–510 1C for early phases, titanite and aegirine-augite. The second stage is formed by calcite, chlorite...Hydrothermal alteration Mineralogy Geochemistry Aegirine Fluid inclusions Stable isotopes Outer Western...assemblage involving, inter alii, also titanite, aegirine-augite and Sr-minerals. The specific mineral composition...phenocrysts of clinopyroxene (augite to diopside with rare aegirine-augite rims), brown amphibole (kaersutite) |
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