ID: 33
rec_id: 33
depname: Mrima Hill
deptype: 10
depage: post-Karroo
json: {"id":"http:\/\/mrdata.usgs.gov\/carbonatite\/record\/33","type":"Feature","geometry":{"type":"Point","coordinates":[39.252777777778,-4.4861111111111]},"properties":{"country":"Kenya","cntrycd":"KNYA","stprov":"Coast","depname":"Mrima Hill","latitude":"-4.48611111111111","latdeg":-4,"latmin":-29,"latsec":-10,"longitude":"39.2527777777778","londeg":39,"lonmin":15,"lonsec":10,"discdate":"1952","mintype":"beforsite, s\u00f6vite","oreton":"49","deptype":10,"niobium":"0.7","ree":"0.61","p2o5":"0","grades":"Deans (1966)","depage":"post-Karroo","agemy":"0","tectset":"Early-Middle Jurassic Kenya Coast rift","rocks":"carbonatite, carbonatite agglomerate, monchiquite","rocksmap":"sandstone, shale, siltstone (Jurassic)","orebody_fm":"oval plug","ore_a":"2.2","ore_area":"2.4","ore_b":"1.4","alttype":"fenitization, argillization (mostly supergene)","altwidth":"0","comments":"Resources of lateritic soil ?100 m thick. According to Deans (1966), 49 Mt of residual ore include 6 Mt at 5% Re2O3, ore contains 0.04\u00960.2% MoO3.","mineral":[{"role":"ore","name":"anatase"},{"role":"ore","name":"apatite"},{"role":"ore","name":"ba-pyrochlore"},{"role":"ore","name":"barite"},{"role":"ore","name":"brookite"},{"role":"ore","name":"florencite"},{"role":"ore","name":"galena"},{"role":"ore","name":"gorceixite"},{"role":"ore","name":"goyazite"},{"role":"ore","name":"hematite"},{"role":"ore","name":"ilmenite"},{"role":"ore","name":"limonite"},{"role":"ore","name":"magnetite"},{"role":"ore","name":"marcasite"},{"role":"ore","name":"monazite"},{"role":"ore","name":"perovskite"},{"role":"ore","name":"psilomelane"},{"role":"ore","name":"pyrite"},{"role":"ore","name":"pyrochlore"},{"role":"ore","name":"pyrrhotite"},{"role":"ore","name":"rutile"},{"role":"ore","name":"sphalerite"},{"role":"ore","name":"zircon"},{"role":"gangue","name":"amphibole"},{"role":"gangue","name":"biotite"},{"role":"gangue","name":"calcite"},{"role":"gangue","name":"chlorite"},{"role":"gangue","name":"dolomite"},{"role":"gangue","name":"epidote"},{"role":"gangue","name":"feldspar"},{"role":"gangue","name":"kaolinite"},{"role":"gangue","name":"melilite"},{"role":"gangue","name":"phlogopite"},{"role":"gangue","name":"quartz"},{"role":"gangue","name":"scapolite"},{"role":"gangue","name":"spinel"}],"reference":["Deans, T., 1966, Economic mineralogy of African carbonatites, in Tuttle, O.F., and Gittins, J., eds., Carbonatites: New York, Interscience Publishers, p. 385\u0096413.","Goetze, G.L., and Edwards, C.B., 1959, The Mrima Hill carbonatite, Coast province, Kenya: Transactions of the Geological Society of South Africa, v. 62, p. 373\u0096396.","Harris, P.M., 1965, Pandaite from the Mrima Hill niobium deposit (Kenya): Mineralogical Magazine, v. 35, p. 277\u0096290.","Horkel, A.D., 1984, Notes on the geology and mineral resources of the southern Kenyan cost: Mitteilungen \u00d6sterreichische Geologische Gesellschaft, Band 77, p. 151\u0096159.","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=33