| | Journal (article/letter/editorial) | 2000 Lakeshore Drive, New Orleans, Louisiana 70148, USA Sarah L. HANSON Geology Department, Adrian College... 110 S. Madison Street, Adrian, Michigan 49221, USA Alexander U. FALSTER and Karen L.WEBBER Department...2000 Lakeshore Drive, New Orleans, Louisiana 70148, USA Abstract Pegmatites enriched in the rare-earth elements...southwestern trend from Wisconsin through Colorado to Arizona. Four widely geographically spaced pegmatite districts...northwestern Arizona. The extreme enrichment of HREE in minerals such as polycrase-(Y), euxenite-(Y), samarskite-(Y) | | | Book | '.:. :,.· ~'. ', •• 1, •,· \:_)\_?. '.:,y::_.;:' • .-.,··: ..,;'.-·.:·.;:/f/t'l.._._._,, '···••::::••...Inc., Tucson, Arizona Copyright~ 2016 The Mineralogical Record. Inc. Tucson, Arizona All rights reserved...last, at www.MineralogicalRecord.com I IIMORIITE-(Y) EUROPE FRANCE Trimouns quarry, Luzenac, Ariege....extremely rare yttrium silicate-carbonate iimoriite-(Y) occurs at Trimouns as colorless, pink and pale brown...long (Marty, 2004 ). AFRICA widely in Litchfield County, where good crystals were taken from quartz veins |
|