REE minerals at the Songwe Hill carbonatite, Malawi: HREE-enrichment in late-stage apatite

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• 作者：Sam Broom-Fendley^a ; ^b ; ^{s.l.broom-fendley@ex.ac.uk} ; Aoife E. Brady^c ; ¹ ; Frances Wall^a ; Gus Gunn^b ; William Dawes^c
• 关键词：L ; liquid ; V ; vapour ; TREO ; total rare earth oxides
• 刊名：Ore Geology Reviews
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：81
• 期：part_P1
• 页码：23-41
• 全文大小：16139 K
• 卷排序：81

文摘

The highest HREE concentration documented in apatite from a carbonatite Principal REE minerals at Songwe are synchysite-(Ce) and HREE-bearing apatite This combination of minerals gives a REE distribution profile that fits the current economic requirements for Nd and HREE Multiple apatite generations are present, enabling differentiation between various magmatic and hydrothermal stages The HREE-enriched apatite is hydrothermally formed Rapid crystallisation of apatite from a hydrothermal fluid leads to preferential destabilisation of the HREE