 | | Journal (article/letter/editorial) | | production of Nb, with the primary St. Honoré carbonatite and other sources accounting for only for 7 and...individual petrographically-defined units of carbonatite contain distinct suites of pyrochlore. Bulk rock...10 times or more above those of the primary carbonatite. Commonly, pyrochlores in laterites are fine grained...and 1%, respectively. Mining at the Catalão-I carbonatite was discontinued in 2001, although there is a...(Cordeiro et al., 2011). Many other occurrences of carbonatite are currently being evaluated [e.g. Aley and |  | | Journal (article/letter/editorial) | | niobium, metallogeny of tantalum, tantaloniobates, carbonatite, nepheline syenite, alkali granite, syenite,...(Fennoscandian) Shield, namely, Siilinjärvi carbonatite and Saharjok nepheline–syenite (Zozulya et al...(13) Bayan Obo; (14) Nemegosenda; (15) Luesh; (16) Bingo; (17) Ghurayyah; (18) Halzan Buregtei; (19) Ulug-Tanzek;...Motzfeldt Seis Lagos Bayan Obo Nemegosenda Luesh Bingo Ghurayyah Halzan Buregtei Ulug-Tanzek Zashihinskoe...means alkali granite; as, alkali syenite; cb, carbonatite; h, hydrothermal ore; ns, nepheline syenite; |  | | 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 |  | Thompson, R., Smith, P., Gibson, S., Mattey, D., Dickin, A. (2002) Ankerite carbonatite from Swartbooisdrif, Namibia: the first evidence for magmatic ferrocarbonatite. Contributions to Mineralogy and Petrology, 143 (3) 377-396 doi:10.1007/s00410-002-0350-0 | Journal (article/letter/editorial) | | Gibson D.P. Mattey Æ A.P. Dickin Ankerite carbonatite from Swartbooisdrif, Namibia: the first evidence...analysis of magnetite and pyrochlore from the carbonatite allows calculation of their modal amounts from...01) are appropriate for an 1,100-Ma magmatic carbonatite. Likewise, carbonate d18O=8.0 and d13C=–7.36...Tanzania, are incontrovertible evidence of Na-rich carbonatite melts (Bell and Keller 1995). An array of volcanological...proposed for deciding whether an individual carbonatite occurrence has a magmatic origin. Experimental |  | | 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 |
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