Browsing by Subject "Nepheline syenite"
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The mineralogy and petrology of layered series nepheline syenite within Center II of the Coldwell Complex (2018)The Coldwell Complex is situated within the Archean Schreiber-White River metavolcanic and metasediment of the Superior Province. Spanning over 25km in diameter, it is the largest alkaline intrusion in North America. The ...