ID: 1
rec_id: 1
depname: Bonga
deptype: 10
depage: 138–130 K-Ar; 112±8 Rb-Sr (biotite)
json: {"id":"http:\/\/mrdata.usgs.gov\/carbonatite\/record\/1","type":"Feature","geometry":{"type":"Point","coordinates":[13.967222222222,-14.268055555556]},"properties":{"country":"Angola","cntrycd":"ANGL","stprov":"Benguela","depname":"Bonga","latitude":"-14.2680555555556","latdeg":-14,"latmin":-16,"latsec":-5,"longitude":"13.9672222222222","londeg":13,"lonmin":58,"lonsec":2,"discdate":"1950","mintype":"apatitic carbonatite, rauhaugite, s\u00f6vite","oreton":"824","deptype":10,"niobium":"0.48","ree":"0","p2o5":"0","grades":"Kamitani and Hirano (1990)","depage":"138\u0096130 K-Ar; 112\u00b18 Rb-Sr (biotite)","agemy":"130","tectset":"Cretaceous Mo\u00e7amedes Arch in easternmost part of Paran\u00e1-Angola-Etendeka alkaline province at junction of Brazilian and Angolan shields","rocks":"carbonatite, fenite","rocksmap":"granite gneiss (Proterozoic); alkali gabbro, ijolite, nepheline syenite, phonolite, tephrite (Cretaceous Mt. Tchivira complex)","orebody_fm":"plug","ore_a":"4","ore_area":"12.6","ore_b":"4","alttype":"brecciation, fenitization (ring)","altwidth":"0.5","dep5km":"10","mineral":[{"role":"ore","name":"apatite"},{"role":"ore","name":"barite"},{"role":"ore","name":"magnetite"},{"role":"ore","name":"parisite"},{"role":"ore","name":"pyrite"},{"role":"ore","name":"pyrochlore"},{"role":"ore","name":"rutile"},{"role":"ore","name":"strontianite"},{"role":"ore","name":"synchysite"},{"role":"gangue","name":"ankerite"},{"role":"gangue","name":"biotite"},{"role":"gangue","name":"calcite"},{"role":"gangue","name":"dolomite"},{"role":"gangue","name":"garnet"}],"reference":["Alberti, A, Castorina, F., Censi, P., Comin-Chiaramonti, P., and Gomes, C.B., 1999, Geochemical characteristics of Cretaceous carbonatites from Angola: Journal of African Earth Sciences, v. 29, no. 4, p. 736\u0096759.","Coltorti, M., Alberti, A., Beccaluva, L., Dos Santos, A.B., Mazzucchelli, M., Morais, E., Rivalenti, G., and Siena F., 1993, The Tchivira-Bonga alkaline-carbonatite complex (Angola)\u0097petrological study and comparison with some Brazilian analogues: The European Journal of Mineralogy, v. 5, no. 6, p. 1001\u00961024.","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.","Woolley, A.R., 2001, Alkaline rocks and carbonatites of the world, Part 3\u0097Africa: London, The Geological Society, 372 p."]}}
url: https://mrdata.usgs.gov/carbonatite/show-carbonatite.php?rec_id=1