Significance of REE-mineral inclusions in aegirine from an alkali syenite, Negev, Israel
Bogoch, Ron; Weissbrod, Tuvia; Bar-Matthews, Miriyam
European Journal of Mineralogy Volume 4 Number 6 (1992), p. 1337 - 1346
published: Dec 15, 1992
manuscript accepted: Feb 18, 1992
manuscript received: Nov 12, 1990
ArtNo. ESP147050406013, Price: 29.00 €
Abstract The mineral assemblage of a sub-volcanic alkali syenite in the Negev, Israel, has been modified by late-stage Na-enriched fluid, also leading to relatively high REE, Y and Nb contents. Three rare earth element minerals (lanthanum monazite-(Ce), neodymium synchysite- (La) (bastnasite group) and lanthanite-Ce, occurring mainly as inclusions within the aegirine and formed from these fluids. Sr and Ba were removed from the system with escaping volatiles.