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      "rel" : "collection",
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      "title" : "The collection document"
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      "href" : "https://energy.usgs.gov/arcgis/rest/services/MRData/Carbonatite/OGCFeatureServer/collections/1/items/10?f=json",
      "rel" : "self",
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      "title" : "This document as JSON"
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    "depname" : "Serra Negra",
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    "depage" : "81.6 K-Ar, biotite",
    "json" : "{\"id\":\"http:\\/\\/mrdata.usgs.gov\\/carbonatite\\/record\\/10\",\"type\":\"Feature\",\"geometry\":{\"type\":\"Point\",\"coordinates\":[-46.886666666667,-18.920277777778]},\"properties\":{\"country\":\"Brazil\",\"cntrycd\":\"BRZL\",\"stprov\":\"Minas Gerais\",\"depname\":\"Serra Negra\",\"latitude\":\"-18.9202777777778\",\"latdeg\":-18,\"latmin\":-55,\"latsec\":-13,\"longitude\":\"-46.8866666666667\",\"londeg\":-46,\"lonmin\":-53,\"lonsec\":-12,\"mintype\":\"s\\u00f6vite\",\"oreton\":\"200\",\"deptype\":10,\"niobium\":\"0\",\"ree\":\"0.9\",\"p2o5\":\"0\",\"grades\":\"(Kamitani and Hirano, 1990), REE grade approximately calculated\",\"depage\":\"81.6 K-Ar, biotite\",\"agemy\":\"82\",\"tectset\":\"Cretaceous Alta Parana\\u00edba igneous province in the Proterozoic Brasilia belt dividing S\\u00e3o Francisco craton and Paran\\u00e1 basin\",\"rocks\":\"carbonatite, dunite, jacupirangite, peridotite, shonkinite\",\"rocksmap\":\"phyllite, quartzite (Precambrian)\",\"orebody_fm\":\"oval carbonatite-alkaline intrusive complex\",\"ore_area\":\"65\",\"alttype\":\"fenitization (weak)\",\"altwidth\":\"0\",\"comments\":\"200 Mt at 27.63% TiO2 (Kamitani and Hirano, 1990); \u003e3% Re2O3 in concentrate, extracted as byproduct (Orris and Grauch, 2002). Lateritic cover 150 m thick at oval intrusive complex 65 sq. km.\",\"mineral\":[{\"role\":\"ore\",\"name\":\"anatase\"},{\"role\":\"ore\",\"name\":\"apatite\"},{\"role\":\"ore\",\"name\":\"baddeleyite\"},{\"role\":\"ore\",\"name\":\"perovskite\"},{\"role\":\"ore\",\"name\":\"pyrochlore\"},{\"role\":\"ore\",\"name\":\"th and u minerals (disseminated)\"},{\"role\":\"gangue\",\"name\":\"biotite\"},{\"role\":\"gangue\",\"name\":\"calcite\"},{\"role\":\"gangue\",\"name\":\"quartz\"}],\"reference\":[\"Gomes, C.B., Ruberti, E., and Morbidelli, L., 1990, Carbonatite complexes from Brazil\\u0097A review: Journal of South American Earth Sciences, v. 3, no. 1, p. 51\\u009663.\",\"Kamitani, M., and Hirano, H., 1990, Important carbonatite-alkaline\\/alkaline complexes and related mineral resources in the world: Bulletin of the Geological Survey of Japan, v. 41, no. 11, p. 631\\u0096640.\",\"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.\",\"Ulbrich, H.H.G.J., and Gomes, C.B., 1981, Alkaline rocks from continental Brazil: Earth-Science Reviews, v. 17, p. 135\\u0096154.\",\"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=10"
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