ID: 14
rec_id: 14
depname: Upper Fir
deptype: 10
depage: 328±30 U-Pb, zircon
json: {"id":"http:\/\/mrdata.usgs.gov\/carbonatite\/record\/14","type":"Feature","geometry":{"type":"Point","coordinates":[-119.175,52.309444444444]},"properties":{"country":"Canada","cntrycd":"CNBC","stprov":"British Columbia","depname":"Upper Fir","includes":"Fir","latitude":"52.3094444444444","latdeg":52,"latmin":18,"latsec":34,"longitude":"-119.175","londeg":-119,"lonmin":-10,"lonsec":-30,"discdate":"1949","mintype":"beforsite, s\u00f6vite","oreton":"26.45","deptype":10,"niobium":"0.12","ree":"0","p2o5":"3.2","grades":"Gorham (2007); Commerce Res. Corp. (2008)","depage":"328\u00b130 U-Pb, zircon","agemy":"360","tectset":"Neoproterozoic metamorphic complex of Omineca crystalline belt of Canadian Cordillera","rocks":"carbonatite, mafic rocks, nepheline syenite","rocksmap":"gneiss (Neoproterozoic)","orebody_fm":"series of sills ?80 m thick","ore_a":"3","ore_area":"2.8","ore_b":"1.2","alttype":"fenitization (0.5 m selvages)","altwidth":"0","dep10km":"10","comments":"0.02% Ta2O5 in ore at 0.015% Ta2O5 cut-off. Carbonatite sills and associated rocks are folded and boudinaged.","mineral":[{"role":"ore","name":"apatite"},{"role":"ore","name":"columbite"},{"role":"ore","name":"fersmite"},{"role":"ore","name":"pyrite"},{"role":"ore","name":"pyrochlore"},{"role":"ore","name":"pyrrhotite"},{"role":"ore","name":"sphene"},{"role":"gangue","name":"aegerine-augite"},{"role":"gangue","name":"amphibole"},{"role":"gangue","name":"calcite"},{"role":"gangue","name":"columbite"},{"role":"gangue","name":"dolomite"},{"role":"gangue","name":"olivine"},{"role":"gangue","name":"phlogopite"},{"role":"gangue","name":"pyroxene"},{"role":"gangue","name":"sphene"}],"reference":["Commerce Resources Corporation, 2008, Upper Fir Project, 10 p.,","http:\/\/www.commerceresources.com\/s\/UpperFir.asp (last visited February 9, 2009)","Gorham, J.G., 2007, Technical Report on the Upper Fir tantalum-niobium-bearing carbonatite: Commerce Resources Corporation, 66p., http:\/\/www.commerceresources.com\/i\/pdf\/NI43-101UpperFir.pdf (last visited February 9, 2009)","Pell, J., 1994, Carbonatites, nepheline syenites, kimberlites and related rocks in British Columbia: British Columbia Ministry of Energy, Mines and Petroleum Bulletin 88, 136 p.","Pell, J., and H\u00f6y, T., 1989, Carbonatite in a continental margin environment\u0096the Canadian Cordillera, in in Bell, K., ed., Carbonatites: genesis and evolution: London, Unwin Hyman, p. 200\u0096220.","Resource Investor, 2008, Commerce Resources Corp. expands tantalum and niobium mineralization at the Upper Fir deposit, 3 p., http:\/\/www.resourceinvestor.com\/s\/pebble.asp?relid=40810 (last visited February 9, 2009)","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=14