ID: 21
rec_id: 21
depname: Oka
deptype: 10
depage: 114±7 K-Ar, and 95±5 Rb-Sr, biotite
json: {"id":"http:\/\/mrdata.usgs.gov\/carbonatite\/record\/21","type":"Feature","geometry":{"type":"Point","coordinates":[-74.022222222222,45.504166666667]},"properties":{"country":"Canada","cntrycd":"CNQU","stprov":"Quebec","depname":"Oka","latitude":"45.5041666666667","latdeg":45,"latmin":30,"latsec":15,"longitude":"-74.0222222222222","londeg":-74,"lonmin":-1,"lonsec":-20,"mintype":"s\u00f6vite","oreton":"221","deptype":10,"niobium":"0.23","ree":"0.1","p2o5":"0","grades":"Singer (1998)","depage":"114\u00b17 K-Ar, and 95\u00b15 Rb-Sr, biotite","agemy":"105","tectset":"Canadian shield, eastern part of Paleozoic Ottawa-Bonnechere regional graben; Lower Cretaceous Monteregian alkaline petrologic province","rocks":"alnoite, carbonatite, ijolite, melteigite, okaite, urtite","rocksmap":"gneiss (Archean)","orebody_fm":"oval double-ring complex","ore_a":"7","ore_area":"13.7","ore_b":"2.5","alttype":"fenitization","altwidth":"0","comments":"Tonnge-grade includes 4.0 Mt at 0.31% Nb2O5, 0.39% Re2O3, and 3.8% P2O5 (Orris and Grauch (2002). Area covered by glacial sediments 60\u0096120 m thick.","mineral":[{"role":"ore","name":"apatite"},{"role":"ore","name":"britholite"},{"role":"ore","name":"ilmenite"},{"role":"ore","name":"magnetite"},{"role":"ore","name":"niocalite"},{"role":"ore","name":"perovskite"},{"role":"ore","name":"pyrite"},{"role":"ore","name":"pyrochlore"},{"role":"ore","name":"pyrrhotite"},{"role":"gangue","name":"biotite"},{"role":"gangue","name":"calcite"},{"role":"gangue","name":"dolomite"},{"role":"gangue","name":"hauyne"},{"role":"gangue","name":"melanite"},{"role":"gangue","name":"melilite"},{"role":"gangue","name":"nepheline"},{"role":"gangue","name":"pyroxene"},{"role":"gangue","name":"richterite"},{"role":"gangue","name":"wollastonite"}],"reference":["Eby, G.N., 1973, Scandium geochemistry of the Oka carbonatite complex, Oka, Quebec: American Mineralogist, v. 58, p. 819\u0096825.","Eby, G.N., 1975, Abundance and distribution of the rare-earth elements and yttrium in the rocks and minerals of the Oka carbonatite complex, Quebec: Geochemica et Cosmochemica Acta, v. 39, p. 597\u0096620.","Orris, G.J., and Grauch, R.I., 2002, Rare earth element mines, deposits, and occurrences: U.S. Geological Survey Open-File Report 02-189, 174 p.","Singer, D.A., 1998, Revised grade and tonnage model of carbonatite deposits: U.S. Geological Survey Open-File Report 98-235, 8 p.","Treiman, A.H., and Essene, E.J., 1985, The Oka carbonatite complex, Quebec\u0097Geology and evidence for silicate-carbonate liquid immiscibility: American Mineralogist, v. 70, p. 1101\u00961113.","Woolley, A.R., 1987, Alkaline rocks and carbonatites of the world \u0096 Part 1: North and South America: London, British Museum (Natural History), 216 p.","Zurevinski, S.E., and Mitchell, R., 2004, Extreme compositional variation of pyrochlore-group minerals at the Oka carbonatite complex, Quebec\u0097Evidence of magma mixing?: The Canadian Mineralogist, v. 42, p. 1159\u00961168."]}}
url: https://mrdata.usgs.gov/carbonatite/show-carbonatite.php?rec_id=21