ID: 18
rec_id: 18
depname: Martinson Lake
deptype: 10
json: {"id":"http:\/\/mrdata.usgs.gov\/carbonatite\/record\/18","type":"Feature","geometry":{"type":"Point","coordinates":[-83.151388888889,50.4125]},"properties":{"country":"Canada","cntrycd":"CNON","stprov":"Ontario","depname":"Martinson Lake","latitude":"50.4125","latdeg":50,"latmin":24,"latsec":45,"longitude":"-83.1513888888889","londeg":-83,"lonmin":-9,"lonsec":-5,"discdate":"1981","mintype":"beforsite, s\u00f6vite","oreton":"145","deptype":10,"niobium":"0.35","ree":"0","p2o5":"20.1","grades":"Potapoff (1989)","agemy":"0","tectset":"Canadian shield Superior province; NW flank of Kapuskasing structural zone","rocks":"carbonatite, ultramafic breccia","rocksmap":"granite, granite gneiss (Archean)","orebody_fm":"intrusive complex 31sq. km (three plugs at distance ?2 km, main plug 4 sq. km)","ore_a":"3","ore_area":"4","ore_b":"1.7","alttype":"fenitization?","altwidth":"0","comments":"The area covered by glacial till 30\u009690 m thick. Tonnage and grades estimated for residuum of coarse apatite sand 170 m thick containing also ~0.12% La2O3 and possible U-mineralization.","mineral":[{"role":"ore","name":"apatite"},{"role":"ore","name":"magnetite"},{"role":"ore","name":"pyrite"},{"role":"ore","name":"pyrochlore"},{"role":"gangue","name":"biotite"},{"role":"gangue","name":"calcite"},{"role":"gangue","name":"dolomite"},{"role":"gangue","name":"olivine"},{"role":"gangue","name":"phlogopite"},{"role":"gangue","name":"serpentine"}],"reference":["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.","Potapoff, P., 1989, The Martinson carbonatite deposit, in Notholt, A.J.G., Sheldon, R.P., and Davidson, D.F., eds., Phosphate deposits of the world, v. 2: Cambridge University Press, p. 71\u009678.","Sage, R.P., 1979, Alkalic rocks carbonatite complexes: Ontario Geological Survey,Summary of field work, 1979, Miscellaneous Paper, v. 90, p. 70\u009675.","Sage, R., and Watkinson, D.H., 1991, Alkalic rock-carbonatite complexes of the Superior structural province, northern Ontario, Canada: Chronique de la Recherche Miniere, no. 504, p. 5\u009619.","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."]}}
url: https://mrdata.usgs.gov/carbonatite/show-carbonatite.php?rec_id=18