A river sand sample from the Hongcheon River was magnetically fractionated to concentrate heavy minerals to determine the potential of the river for the recovery of valuable minerals. Separate magnetite/haematite-rich, ilmenite-rich, monazite-rich and zircon-rich fractions were characterised using chemical, X-ray and electron beam techniques. The magnetite particles were high-grade (93.7wt% Fe2O3), fully liberated and with minor or trace amounts of Mn, Mg, and Al. The ilmenite contained, on average, 53.6% Fe2O3 and 50.8% TiO2 and mineral impurities in the fraction included garnet, olivine, and magnetite, present as discrete grains. Two populations of monazite grains were found (Ce-rich and Th-rich), both dominated by LREEs. The zircon fraction contained ∼70% zircon particles with impurity phases including titanite and fluorapatite. Characterisation of the concentrates showed that the ilmenite could be commercially processed but further refinement of the processing conditions is required to generate higher grade concentrates that are potentially suitable for commercial applications.
LiangWHuXGarzantiA. A global database of petrographic composition and heavy minerals in modern river sediment. Geoscience Data Journal DDE Repository 2022; 11: 443–451.
2.
MangeMAWrightDT. Heavy minerals in use. Developments in sedimentology series; volume 58. Amsterdam, The Netherlands: Elsevier, 2007, p. 1283.
3.
MortonAC. Value of heavy minerals in sediments and sedimentary rocks for provenance, transport history and stratigraphic correlation. In: SylvesterP (eds) Quantitative mineralogy and microanalysis of sediments and sedimentary rocks. Mineralogical association of Canada short course series, volume 42. Quebec City, QC, Canada: Mineralogical Association of Canada, 2012, pp.133–165.
4.
GarzantiEAndòS. Heavy minerals for junior woodchucks. Minerals2019; 9: 48.
5.
CobbEH. Placer deposits of Alaska. U.S. Geological Survey Bulletin1973; 1374: 213.
6.
DesboroughGARaymondWHIagminPJ. Distribution of silver and copper in placer gold derived from the northeastern part of the Colorado mineral belt. Economic Geology1970; 65: 937–944.
7.
StepanovSYPalamarchukRSVarlamovDA, et al.Platinum group minerals from Veresovka River deluvial placer, Veresovoborsky Dunite-Clinopyroxenite Massif (Middle Urals). Geol Ore Deposits2019; 61: 767–778.
8.
ForceER. Geology of titanium-mineral deposits. Geol Soc Amer. Special Paper1991; 259.
9.
AralHPowncebyMIImJ. Characterisation and beneficiation of zircon-rich heavy mineral concentrates from Central Kalimantan (Borneo, Indonesia). Trans Inst Min Metall B (Appl Earth Sci)2008; 117: 77–87.
10.
RahmanMAPowncebyMIHaqueN, et al.Characterisation of titanium-rich heavy mineral concentrates from the Brahmaputra River basin. Bangladesh. Trans Inst Min Metall B (Appl Earth Sci)2014; 123: 221–233.
11.
RahmanMAPowncebyMIHaqueN, et al.Valuable heavy minerals from the Brahmaputra river sands of Northern Bangladesh. Trans Inst Min Metall B (Appl Earth Sci)2016; 125: 174–188.
12.
KimWJ. Placer deposits of detrital heavy minerals in Korea. Technical bulletin - united nations, economic and social commission for Asia and the pacific (ESCAP), committee for co-ordination of joint prospecting for mineral resources in Asian offshore areas (CCOP). 1970; 3: 127–136.
13.
ParkJKLeeJHSeoJR. Magnetite-monazite-apatite-strontianite-barite mineralizations, Proterozoic carbonate rocks, Hongcheon-Jaun area, Kangwon-Do, Korea. Korea Inst Geol Min Mater. Report KR-94(C)1-7, 133 pp (in Korean). 1995.
14.
KimSJLeeHKYinJ,et al.Chemistry and origin of monazites from carbonatite dikes in the Hongcheon-Jaeun district, Korea. J Asian Earth Sci2005; 25: 57–67.
15.
KimNCheongACYiK, et al.Post-collisional carbonatite-hosted rare earth element mineralization in the Hongcheon area, central Gyeonggi massif, Korea: ion microprobe monazite U-Th-Pb geochronology and Nd-Sr isotope geochemistry. Ore Geol Rev2016; 79: 78–87.
16.
LeeCHLeeSH. Petrological studies on the genesis of the Hongcheon iron deposits, Korea. J Geol Soc Korea1989; 25: 239–258. (in Korean with English abstract).
17.
LeeSH. Geochemistry of minerals in the Hongcheon magnetite deposits, Korea. J Petrol Soc Korea1998; 7: 98–110. (in Korean with English abstract).
18.
LeeHYParkJKHwangDH. Petrography of Hongcheon Fe-REE deposits. J Petrol Soc Korea2002; 11: 90–102. (in Korean with English abstract).
19.
ParkJKLeeHY. The Fe-REE ore deposit hosted by carbonate-alkali ultrabasic complex in Hongcheon, S. Korea. In: PiestryzinskiA (ed) Mineral deposits at the beginning of the 21st century. 1st ed.London: CRC Press, 2001, pp.623–626.
20.
OhYBParkJRShinDB,et al.Petrography of Hongcheon carbonatite-phoscorite complex. J Geol Soc Korea2010; 46: 367–380. (in Korean with English abstract).
21.
KIGAM. Mineralization and feasibility study of Fe-REE deposits in Hongcheon area, S. Korea. 2000-R-TI02-P-01. Daejeon: Korea Institute of Geoscience and Mineral Resources, 2001, p. 257.
22.
KimSJLeeHKYinJ,et al.Fe-REE mineralization of the Hongcheon-Jaeun district. J Econ Environ Geol2001; 34: 319–328.
23.
AmelinYZaitsevAN. Precise geochronology of phoscorites and carbonatites: the critical role of U-series disequilibrium in age interpretations. Geochimica et Cosmochimica Acta2002; 66: 2399–2419.
24.
KrasnovaNIPetrovTGBalaganskayaEG, et al.Introduction to phoscorites: occurrence, composition, nomenclature and petrogenesis. In: ZaitsevAWallF (eds) Phoscorites and carbonatites from mantle to mine: the key example of the Kola alkaline province. Mineralogical society series, 10. London: Mineralogical Society, 2004, pp.43–72.
25.
ChaoECTBackJMinkinJA,et al.Host-rock controlled epigenetic, hydrothermal metasomatic origin of the Bayan Obo REE–Fe–Nb ore deposit, Inner Mongolia. P.R.C. Appl. Geochem1992; 7: 443–458.
26.
Le BasMJKellerJTaoK, et al.Carbonatite dykes at Bayan Obo, Inner Mongolia. China. Mineralogy and Petrology1992; 46: 195–228.
27.
SmithMPHendersonPCampbellLS. Fractionation of the REE during hydrothermal processes: constraints from the Bayan Obo Fe-REE-Nb deposit, Inner Mongolia, China. Geochimica et Cosmochimica Acta2000; 64: 3141–3160.
28.
AhnJSYoumS-JChoY-C, et al.Geochemical survey of rare earth elements (REEs) in the concealed ore body of Hongcheon, Korea. Environ Earth Sci2014; 72: 2153–2161.
29.
PowncebyMIMacRaeCMWilsonNC. 2001. Electron microprobe mapping – A diagnostic tool for ilmenite characterisation international heavy minerals conference 2001, The Australasian Institution of Mining and Metallurgy, Carlton, pp. 69–74.
30.
PowncebyMIMacRaeCMWilsonNC. Mineral characterisation by EPMA mapping. Minerals Engineering2007; 20: 444–451.
31.
MacRaeCMWilsonNCJohnsonSA, et al.Hyperspectral mapping—combining cathodoluminescence and X-ray collection in an electron microprobe. Microsc Res Tech2005; 67: 271–277.
32.
TorpyAWilsonNCMacRaeCM. Hyperspectral mapping in a FEG-EPMA. In: Griffin BJ, editor. Proceedings of the 20th Australian Conference on Microscopy and Microanalysis (ACMM-20)/4th Congress of the International Union of Microbeam Analysis Societies (IUMAS-IV), Perth, Western Australia. Location: publisher; p. 54–55. 2008.
33.
HarrowfieldIRMacRaeCMWilsonNC. Chemical imaging in electron microprobes. In: Armstrong JT, Porter JR, editors. Proceedings of the 27th Annual MAS Meeting; July; Los Angeles, CA. New York: Microbeam Analysis Society: p. 547–548. 1993.
34.
WilsonNMacRaeCTorpyA. Analysis of combined multi-signal hyperspectral datasets using a clustering algorithm and visualisation tools. Microsc Microanal2008; 14: 764–765.
35.
DutchRA. Monazite chemical dating via electron-probe MicroAnalysis. MESA J2009; 53: 34–40.
36.
CarpenterPK. EPMA Standards: the good, the bad, and the ugly. Microsc Microanal2008; 14: 530–531.
37.
PouchouJ-LPichoirF. “PAP” (φ-ρ-Z) correction procedure for improved quantitative microanalysis. In: ArmstrongJT (eds) Microbeam analysis proceedings. San Francisco: San Francisco Press, 1985, pp.104–106.
38.
PouchouJ-LPichoirF. Quantitative analysis of homogeneous or stratified microvolumes applying the model “PAP”. In: HeinrichKFJNewburyDE (eds) Electron probe quantitation. New York: Plenum Press, 1991, pp.31–75.
39.
IvanyukGYKalashnikovAOPakhomovskyYA, et al.Economic minerals of the Kovdor baddeleyite-apatite-magnetite deposit, Russia: mineralogy, spatial distribution and ore processing optimization. Ore Geol Rev2016; 77: 279–311.
40.
GaraninVKKudryavtsevaGPLapinAV. Typical features of ilmenite from kimberlites, alkali-ultrabasic intrusions, and carbonatites. Int Geol Rev1980; 21: 1025–1105.
41.
LinthoutK. Tripartite division of the system 2REEPO4–CaTh(PO4)2–2ThSiO4, discreditation of brabantite, and recognition of cheralite as the name for members dominated by CaTh(PO4)2. Can. Mineral2007; 45: 503–508.
42.
WallFZaitsevAN. Phoscorites and Carbonatites from Mantle to Mine: the Key Example of the Kola Alkaline Province. The Mineralogical Society Series no. 10. xv + 498 pp. London: The Mineralogical Society of Great Britain and Ireland, 2004.
43.
ChakhmouradianARWilliamsCT. Mineralogy of high-field strength elements (Ti, Nb, Zr, Ta, Hf) in phoscoritic and carbonatitic rocks of the Kola Peninsula, Russia. In: WallFZaitsevA (eds) Phoscorites and carbonatites from mantle to mine: the key example of the Kola alkaline province. The mineralogical society of Great Britain and Ireland. London: Mineralogical Society of Great Britain and Ireland, 2004, pp.293–340.
44.
ChenWHonghuiHBaiT,et al.Geochemistry of monazite within carbonatite related REE deposits. Resources2017; 6: 51.
45.
MitchellRH. Primary and secondary niobium mineral deposits associated with carbonatites. Ore Geol Rev2015; 64: 626–641.
46.
HaggertyS.E., 1976. Opaque mineral oxides in terrestrial igneous rocks, Oxide minerals, short course notes. 3, RumbleD.III editor. Washington, DC. Mineralogical Society of America: 101–300.
47.
HeinrichWAndrehsGFranzG. Monazite-xenotime miscibility gap thermometry. I. An Empirical Calibration. J Metamorphic Geol1997; 15: 3–17.
48.
ElsnerH. Heavy Minerals of Economic Importance, Bundesanstaltfür Geowissenschaften und Rohstoffe (BGR) Assessment Manual. 2010.
49.
GroszAE. Nature and distribution of potential heavy-mineral resources offshore of the Atlantic coast of the United States. Marine Mining1987; 6: 339–357.
50.
PistoriusPC. Ilmenite smelting: the basics. J South African Inst Min Metall2008; 108: 35–43.
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