AbstractGet full access to this articleView all access options for this article.Get accessReferences1. McCreath JA , Finch AA , Herd DA , Armour-Brown A. 2013. Geochemistry of pyrochlore minerals from the Motzfeldt Center, South Greenland: the mineralogy of a syenite-hosted Ta, Nb deposit. Am Mineral. 98:426–438. doi: 10.2138/am.2013.4068