Niobium ore genesis in a capsule-Reference-Cited by-同舟云学术

Niobium ore genesis in a capsule

Published:2024-04-25 Issue:7 Volume:52 Page:560-564
ISSN:0091-7613
Container-title:Geology
language:en
Short-container-title:

Author:

Williams-Jones A.E.¹^ORCID,Vasyukova O.V.¹,Kostyuk A.V.²

Affiliation:

1. 1Department of Earth and Planetary Sciences, McGill University, Montréal, Canada H3A 0E8

2. 2Korzhinskii Institute of Experimental Mineralogy, Russian Academy of Sciences, Chernogolovka 142432, Russia

Abstract

Abstract Experiments were conducted to test the hypothesis that carbonatite-hosted Nb deposits owe their origin to the metasomatic alteration of K-feldspar-rich fenite by carbonatitic magma. This involved reacting K-feldspar with a synthetic mixture of CaCO3, MgCO3, Mg(OH)2, CaF2, and Nb2O5. At the experimental conditions, a phlogopite-rich calcite-bearing metasomatic rind containing pyrochlore formed on the K-feldspar. This supports the above hypothesis and also explains the origin of fenite-associated glimmerite, the association of glimmerite with calcite carbonatite, and the genesis of the carbonatite-hosted ores that supply the bulk of the world's niobium.

Publisher

Geological Society of America

Link

https://pubs.geoscienceworld.org/gsa/geology/article-pdf/52/7/560/6508663/g52169.1.pdf

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