{
  "type" : "Feature",
  "links" : [
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      "href" : "https://energy.usgs.gov/arcgis/rest/services/MRData/Carbonatite/OGCFeatureServer/collections/1/items?f=application%2fjson",
      "rel" : "collection",
      "type" : "application/geo+json",
      "title" : "The collection document"
    },
    {
      "href" : "https://energy.usgs.gov/arcgis/rest/services/MRData/Carbonatite/OGCFeatureServer/collections/1/items/18?f=json",
      "rel" : "self",
      "type" : "application/geo+json",
      "title" : "This document as JSON"
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    {
      "href" : "https://energy.usgs.gov/arcgis/rest/services/MRData/Carbonatite/OGCFeatureServer/collections/1/items/18?f=text/html",
      "rel" : "alternate",
      "type" : "text/html",
      "title" : "This document as text/html"
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    {
      "href" : "https://energy.usgs.gov/arcgis/rest/services/MRData/Carbonatite/OGCFeatureServer/collections/1/items/18?f=application/geo+json",
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      "title" : "This document as application/geo+json"
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  "LayerId" : 1,
  "LayerName" : "mrdata.carbonatite.carbonatitev",
  "id" : "18",
  "properties" : {
    "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"
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}