ID: 30
rec_id: 30
depname: Mabounie
deptype: 10
depage: 660±13 K-Ar, phlogopite
json: {"id":"http:\/\/mrdata.usgs.gov\/carbonatite\/record\/30","type":"Feature","geometry":{"type":"Point","coordinates":[10.368888888889,-0.59277777777778]},"properties":{"country":"Gabon","cntrycd":"GABN","stprov":"Moyen-Ogoou\u00e9","depname":"Mabounie","latitude":"-0.592777777777778","latmin":-35,"latsec":-34,"longitude":"10.3688888888889","londeg":10,"lonmin":22,"lonsec":8,"discdate":"1986","mintype":"beforsite, s\u00f6vite","oreton":"380","deptype":10,"niobium":"1.02","ree":"2.52","p2o5":"24","grades":"Orris and Chernoff (2002), REE grade from Jackson and Christiansen (1993)","depage":"660\u00b113 K-Ar, phlogopite","agemy":"660","tectset":"Western branch of Pan-African tectonic belt; Ikoye-Ikobe fault system","rocks":"carbonatite, fenite, syenite","rocksmap":"gneiss, migmatite (Precambrian), trachyte dike","orebody_fm":"central plug in carbonatite-alkaline complex","ore_a":"1.2","ore_area":"0.8","ore_b":"1.2","alttype":"fenitization (ring)","altwidth":"1","comments":"Resource of residual lateritic cover 30\u0096120 m thick.","mineral":[{"role":"ore","name":"apatite"},{"role":"ore","name":"baddeleyite"},{"role":"ore","name":"barite (veins)"},{"role":"ore","name":"bastnaesite"},{"role":"ore","name":"crandallite"},{"role":"ore","name":"florencite"},{"role":"ore","name":"goethite"},{"role":"ore","name":"hematite"},{"role":"ore","name":"ilmenite"},{"role":"ore","name":"magnetite"},{"role":"ore","name":"monazite"},{"role":"ore","name":"pyrite"},{"role":"ore","name":"pyrochlore"},{"role":"ore","name":"pyrrhotite"},{"role":"ore","name":"synchysite"},{"role":"ore","name":"xenotime"},{"role":"gangue","name":"calcite"},{"role":"gangue","name":"dolomite"},{"role":"gangue","name":"kaolinite"},{"role":"gangue","name":"phlogopite"},{"role":"gangue","name":"quartz"}],"reference":["Jackson, W.D., and Christiansen, G., 1993, International strategic inventory summary report-\u0096rare-earth oxides: U.S. Geological Survey Circular 930-N, 68 p.","Laval, M., Johan, V., and Tourli\u00e9re, B., 1988, La carbonatite de Mabouni\u00e9: exemple de formation d\u0092un g\u00eete r\u00e9siduel \u00e0 pyrochlore: Chronique de la Recherche Miniere, v. 56, no. 491, p. 125\u0096136.","Laval, M., and Piantone, P., 1989, Niobium deposit of Mabounie (Gabon): 28th International Geological Congress, Abstracts, v. 2, p. 2-263.","Laval, M., Piantone, P., Freyssinet, P., and Kosakevitch, A., 1993, Role of florencite and pyrochlore in the behavior of REE during lateritization\u0097Example of Mabounie carbonatite (Gabon): Terra Abstracts v. 5, no. 3, p. 25\u009626.","Milesi, J.P., Toteu, S.F., Deschamps, Y., and others, 2006, An overview of the geology and major ore deposits of Central Africa: explanatory note for the 1:4,000,000 map \u0093Geology and major ore deposits of Central Africa\u0094: Journal of African Earth Sciences, v. 44, p. 571\u0096595.","Orris, G.J., and Chernoff, C.B., 2002, Data set of world phosphate mines, deposits, and occurrences\u0097Part B. Location and mineral economic data: U.S. Geological Survey, Open-File Report 02-0156B, 328 p.","Piantone, P., Itard, Y., Pillard, F., and Boulingui, B., 1995, Compositional variation in pyrochlores from the weathered Mabouni\u00e9 carbonatite (Gabon), in Pasava, J., Kribek, B., and Zak, K., eds., Mineral deposits; from their origin to their environmental impacts: Rotterdam, A.A. Balkema Publishers, Third Biennial SGA Meeting, p. 629\u0096632.","Woolley, A.R., 2001, Alkaline rocks and carbonatites of the world \u0096 Part 3: Africa: London, The Geological Society, 372 p."]}}
url: https://mrdata.usgs.gov/carbonatite/show-carbonatite.php?rec_id=30