 | | Journal (article/letter/editorial) | | Obo in northern China and the carbonatites of the MianningāDechang belt in SW China. It is proposed that...and Gifford complex) and China (Bayan Obo and the carbonatites of the MianningāDechang belt) are examined...examined. Except for the Mianningā Dechang belt, I have been involved in various degrees with all of the above...Brandberg, Erongo, Gifford Creek, Bayan Obo and Maoniuping. Igneous Cx Rock/mineral dated Method Age...marble Carbonatite dyke Maļ¬c dyke Pyrite Biotite Magnesio-arfvedsonite Biotite in stringer zone 40 133 |  | | Journal (article/letter/editorial) | | currently being investigated. The continentās only hard China, which control the world market for HREEs but have...their exploitaREE ore mineral include Bayan Obo, Maoniuping, and a tion. Many REE occurrences that are currently...deposits in China, and the explored have been considered to be attractive targets by Mountain Pass mine in California...Baringer Hill, TX Xenotime, etc. ā¢ 25 Harding Mine, NM Xenotime, etc. ā¢ 26 Maw Zone/Athabaska, SK...Fluorite and REE mineralization ā¢ 28 Snowbird Mine, MT Parisite Hydrothermal mineralization in syenite |  | Elliott, H.A.L., Wall, F., Chakhmouradian, A.R., Siegfried, P.R., Dahlgren, S., Weatherley, S., Finch, A.A., Marks, M.A.W., Dowman, E., Deady, E. (2018) Fenites associated with carbonatite complexes: A review. Ore Geology Reviews, 93. 38-59 doi:10.1016/j.oregeorev.2017.12.003 | Journal (article/letter/editorial) | | The vast majority of REE production occurs in China (>95 %) (British Geologi- 83 cal Survey, 2017;...233 1966). Feldspar-rich fenites at Bayan Obo, China only extend 2ā4 m into Middle 234 Proterozoic...contains aegirine-augite crystals 495 rimmed by magnesio-arfvedsonite (Le Bas, 2008). Hogarth and Lapointe...phiboles proximal to intrusions have richterite and magnesio-arfvedsonite, alkali-rich 505 compositions....the amphibole is dominated by arfvedsonite and riebeckite 506 compositions with lower alkali content |
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