ID: 37
rec_id: 37
depname: Tundulu
deptype: 10
depage: 133±7 K-Ar, biotite
json: {"id":"http:\/\/mrdata.usgs.gov\/carbonatite\/record\/37","type":"Feature","geometry":{"type":"Point","coordinates":[35.8075,-15.539166666667]},"properties":{"country":"Malawi","cntrycd":"MLWI","depname":"Tundulu","altname":"Nathache","latitude":"-15.5391666666667","latdeg":-15,"latmin":-32,"latsec":-21,"longitude":"35.8075","londeg":35,"lonmin":48,"lonsec":27,"mintype":"s\u00f6vite","oreton":"3.225","deptype":10,"niobium":"0.53","ree":"2.4","p2o5":"12.9","grades":"Dill (2007); Malawi... (2009); Ministry... (2009)","depage":"133\u00b17 K-Ar, biotite","agemy":"133","tectset":"East African rift system; southern part of Tanganyike-Rukwa-Malawi transcurrent fault zone; Chilwa alkaline province","rocks":"breccia, carbonatite, carbonatite agglomerate, foyaite, nepheline syenite, trachyte","rocksmap":"gneiss, granite, granulite (Precambrian), dolerite dike (Karoo)","orebody_fm":"ring complex","ore_a":"4","ore_area":"11","ore_b":"3.5","alttype":"fenitization","altwidth":"2.5","dep5km":"10","comments":"In apatite % oxides: 0.85 Ce, 0.39 La, and 0.36 Nd; in ilmenite 0.84% Nb2O5 (Dawson, 1996). Three mineralized zones in Nathache Hill area contain 0.6 Mt at 1.77% Re2O3 to 50 m depth (Gupta and Kishnamurthy, 2004). Ngwenya (1994) considers quartz-barite-REE veins hydrothermal.","mineral":[{"role":"ore","name":"anatase"},{"role":"ore","name":"apatite"},{"role":"ore","name":"barite"},{"role":"ore","name":"bastnaesite"},{"role":"ore","name":"celestite"},{"role":"ore","name":"florencite"},{"role":"ore","name":"fluorite"},{"role":"ore","name":"goethite"},{"role":"ore","name":"ilmenite"},{"role":"ore","name":"magnetite"},{"role":"ore","name":"monazite"},{"role":"ore","name":"parisite"},{"role":"ore","name":"pyrochlore"},{"role":"ore","name":"strontianite"},{"role":"ore","name":"synchysite"},{"role":"ore","name":"titanite"},{"role":"gangue","name":"aegerine"},{"role":"gangue","name":"ankerite"},{"role":"gangue","name":"biotite"},{"role":"gangue","name":"calcite"},{"role":"gangue","name":"dolomite"},{"role":"gangue","name":"k-feldspar"},{"role":"gangue","name":"melanite"},{"role":"gangue","name":"quartz"},{"role":"gangue","name":"siderite"}],"reference":["Dawson, J.B., Steele, I.M., Smith, J.V., and Rivers, M.L., 1996, Minor and trace element chemistry of carbonates, apatites and magnetites in some African carbonatites: Mineralogical Magazine, v. 60, no. 3, p. 415\u0096425.","Dill, H.G., 2007, A review of mineral resources in Malawi\u0097With special reference to aluminum variation in mineral deposits: Journal of African Earth Sciences, v. 47, p. 153\u0096173.","Garson, M.S., 1966, Carbonatites in Malawi, in Tuttle, O.F., and Gittins, J., eds., Carbonatites: New York, Interscience Publishers, p. 33\u009671.","Gupta, C.K., and Kishnamurthy, N., 2004, Extractive metallurgy of rare earth: CRC Press, 506 p.","Malawi Geological Surveys Department, 2009, Mineral resources of Malawi, 7 p.,","http:\/\/www.malawi.gov.mw\/publications\/geo\/mineralsdoc.htm (last visited February 18, 2009)","Malunga, G.W.P., 2009, Mineral potential of the Nacala corridor, Malawi, 12 p.,","http:\/\/www.sdnp.org.mw\/geosoc-mw\/mineralpotential.htm (last visited February 18, 2009)","Ministry of Energy and Mines, Republic of Malawi, 2009, Mineral potential of Malawi, 8 p.,","http:\/\/www.bgs.ac.uk\/downloads\/start.cfm?id=1239 (last visited February 18, 2009)","Ngwenya, B.T., 1994, Hydrothermal rare earth mineralisation in carbonatites of the Tundulu complex, Malawi: Geochimica and Cosmochimica Acta, v. 58, no. 9, p. 2061\u00962072.","Tiercelin, J.J., Chorowicz, J., Belloni, H., Richert, J.P., Mwanbene, J.T., and Walgenwitz, F., 1988, East African Rift System\u0097Offset, age and tectonic significance of the Tanganyika-Rukwa-Malawi intracontinental transcurrent fault zone: Tectonophysics, v. 148, p. 241\u0096252","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=37