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7467113 
Book/Book Chapter 
Geochemical and mineralogical characteristics of the Yonghwa phoscorite-carbonatite complex, Korea 
Choi, SG; Cho, JM; Kim, DW; Seo, J; Park, JW; Kim, NW 
2013 
Sveriges Geologiska Undersökning 
Uppsala, Sweden 
Mineral deposit research for a high-tech world: Proceedings 
1702-1704 
English 
WOS:000337983900430 
A recently discovered Yonghwa phoscorite-carbonatite complex in Korea, is dated at 193.4 +/- 4.9 Ma by K-Ar method. The phoscorite mainly consists of olivine, apatite, magnetite, carbonates, amphibole and phlogopite. The carbonatite is predominantly composed of calcite and dolomite with ankerite or siderite as secondary phases. Intensive fenitization occurred along the boundary between the complex and wall rocks of leucocratic banded gneiss and garnet metabasite. Fe contents (20.4-57.8 weight % Fe2O3T) of carbonatite are higher compared to typical ferro-carbonatites due to its high magnetite content. REE trends of the phoscorite and carbonatite are highly fractionated with enrichment of LREE and Nb. Apatite also reflects the fractionated trends of LREE relative to HREE. Apatite from phoscorite is enriched in Sr and shows substitution trends between Ca and Sr. Fe and Mg chemistry of mica may reflect the evolutionary trend of a carbonatite melt without Al substitution. The stable isotope compositions of calcite and dolomite from carbonatites and veins suggest magmatic origin of the melt: ca. -8.2 to -3.4 parts per thousand C-13(V-PDB) and 6.6 to 11 parts per thousand O-18(V-SMOW). 
phoscorite; carbonatite; Nb mineralization; stable isotope; Yonghwa; Korea 
Jonsson, E 
9789174032079 
12th Biennial SGA Meeting on Mineral Deposit Research for a High-Tech World 
Uppsala, Sweden 
August 12-15, 2013