ID: 55
rec_id: 55
depname: Magnet Cove
deptype: 10
depage: 97–95±5 K-Ar, biotite;|103±10 fission-track, apatite
json: {"id":"http:\/\/mrdata.usgs.gov\/carbonatite\/record\/55","type":"Feature","geometry":{"type":"Point","coordinates":[-92.854444444444,34.435833333333]},"properties":{"country":"United States","cntrycd":"USAR","stprov":"Arkansas","depname":"Magnet Cove","latitude":"34.4358333333333","latdeg":34,"latmin":26,"latsec":9,"longitude":"-92.8544444444444","londeg":-92,"lonmin":-51,"lonsec":-16,"discdate":"1806","startdate":"1944","mintype":"s\u00f6vite","oreton":"7.26","deptype":10,"niobium":"0.11","ree":"0","p2o5":"0","grades":"Erickson and Blade (1963)","depage":"97\u009695\u00b15 K-Ar, biotite;|103\u00b110 fission-track, apatite","agemy":"101","tectset":"North America Paleozoic midcontinent carbonate platform","rocks":"carbonatite, ijolite, jacupirangite, melteigite, metagabbro, nepheline syenite, phonolite, trachyte","rocksmap":"calc-silicate rocks, chert, conglomerate, limestone, sandstone, shale (Paleozoic)","orebody_fm":"oval alkaline complex 5 x 4.7 km containing carbonatite lenses","ore_a":"5","ore_area":"18.5","ore_b":"4.7","alttype":"fenitization (ring)","altwidth":"0.8","comments":"Past production mainly Ti and Fe, 0.04% Nb2O5 in ore (Kun, 1962). According to Erickson and Blade (1963), reserves contain 4\u00968% TiO2 and 0.05\u00960.15% Nb2O5 or 5.4 t Nb2O5 content.","mineral":[{"role":"ore","name":"anatase"},{"role":"ore","name":"apatite"},{"role":"ore","name":"barite"},{"role":"ore","name":"brookite"},{"role":"ore","name":"chalcopyrite"},{"role":"ore","name":"eudialyte"},{"role":"ore","name":"fluorite"},{"role":"ore","name":"ilmenite"},{"role":"ore","name":"kimzeyite"},{"role":"ore","name":"magnetite"},{"role":"ore","name":"molybdenite"},{"role":"ore","name":"perovskite"},{"role":"ore","name":"pyrite"},{"role":"ore","name":"pyrrhotite"},{"role":"ore","name":"rutile"},{"role":"ore","name":"synchysite"},{"role":"gangue","name":"actinolite"},{"role":"gangue","name":"aegerine"},{"role":"gangue","name":"ankerite"},{"role":"gangue","name":"biotite"},{"role":"gangue","name":"calcite"},{"role":"gangue","name":"garnet"},{"role":"gangue","name":"gypsum"},{"role":"gangue","name":"hercynite"},{"role":"gangue","name":"kaolinite"},{"role":"gangue","name":"montichellite"},{"role":"gangue","name":"phlogopite"},{"role":"gangue","name":"quartz"},{"role":"gangue","name":"smectite"},{"role":"gangue","name":"vesuvianite"},{"role":"gangue","name":"wollastonite"},{"role":"gangue","name":"zeolite"}],"reference":["Erickson, R.L., and Blade, L.V., 1963, Geochemistry and petrology of the alkalic igneous complex at Magnet Cove, Arkansas: U.S. Geological Survey Professional Paper 425, 94 p.","Flohr, M.J., 1994, Titanium, vanadium, and niobium mineralization and alkali metasomatism from the Magnet Cove complex, Arkansas: Economic Geology, v. 89, p. 105\u0096130.","Flohr, M.J., and Ross, M., 1990, Alkaline igneous rocks of Magnet Cove, Arkansas\u0097Mineralogy and geochemistry of syenites: Lithos, v. 26, p. 67\u009698.","Howard, J.M., and Chandler, A., 2007, Magnet Cove, a synopsis of its geology, lithology and mineralogy: AGES Brochure Series 004, 11 p., http:\/\/www.geology.arkansas.gov\/pdf\/pamphlets\/magnet_cove.pdf (last visited April 15, 2009)","Kun de, N., 1962, The economic geology of columbium (niobium) and of tantalum: Economic Geology, v. 57, p. 377\u0096404.","Nesbitt, B.E., and Kelly, W.C., 1977, Magmatic and hydrothermal inclusions in carbonatite of the Magnet Cove complex, Arkansas: Contributions to Mineralogy and Petrology, v. 63, p.272\u0096294.","Woolley, A.R., 1987, Alkaline rocks and carbonatites of the world, Part 1\u0097North and South America: London, British Museum (Natural History), 216 p."]}}
url: https://mrdata.usgs.gov/carbonatite/show-carbonatite.php?rec_id=55