 | | Journal (article/letter/editorial) | | altered rocks associated with Lemitar carbonatites, central New Mexico, U.S.A. Virginia T, McLemore a...Peter], Modreskib aNew MexIco Bureau of Mines and l'v/lneral Resources, Socorro, NM 87801 (l.J S A.) bU...altered rocks associated with the Lemitar carbonatites, central New Mexico, U.S.A. In: A.R. Woolley and M...Proterozoic gram tic and mafic rocks in the Lemitar Mountains. although hematization, carbonatization and...carbonatizatlOn. Locally the Lemitar dionte/gabbro adjacent to some carbonatites were altered in a thin, discontmuous |  | | Journal (article/letter/editorial) | | Dagegen sind die analysierten δ18O-Werte der Ankerite stark variabel (8,9 ‰ bis 9,7 ‰ δ18O) und zugleich...Sauerstoffisotopendaten der (Mineral) (Mineral) Ankerite der Karbonatite NW-Namibias in Folge einer schwachen...Ku-97-26 Tabelle 9 δ18O- und δ13C-Werte separierter Ankerite und Magnetite der Karbonatite von Swartbooisdrif...Abb. 11 δ13C-δ18O-Zusammensetzungen separierter Ankerite der Karbonatite von Swartbooisdrif (graue Quadrate)...Sauerstoff- und Kohlenstoff-Isotopie separierter Ankerite (8.91-9.73 ‰ δ18O und -6.73 bis 6.98 ‰ δ13C) bestätigt |  | Sheard, E. R., Williams-Jones, A. E., Heiligmann, M., Pederson, C., Trueman, D. L. (2012) Controls on the Concentration of Zirconium, Niobium, and the Rare Earth Elements in the Thor Lake Rare Metal Deposit, Northwest Territories, Canada. Economic Geology, 107 (1) 81-104 doi:10.2113/econgeo.107.1.81 | Journal (article/letter/editorial) | | high field strength elements (HFSE)) and created new secondary REE-bearing phases. Introduction over...(“cleavelandite”). Minor alteration minerals are ankerite, siderite, kutnahorite (Ca(Mn,Mg,Fe)(CO3)2), scapolite... Ca5(PO4)3(OH,F,Cl) (Ce,La,Th)PO4 Carbonates Ankerite Bastnäsite Calcite Dolomite Kutnahorite Lanthanite...redistribution of HREE. However, carbonatization (calcite, ankerite, siderite) may have been associated with REE fluoro-carbonate...breakdown and replacement of primary eudialyte by new pseudomorphing phases in lujavrites from the North |
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