ID: 31
rec_id: 31
depname: Amba Dongar
deptype: 10
depage: 65±0.3 Ar-Ar, phlogopite
json: {"id":"http:\/\/mrdata.usgs.gov\/carbonatite\/record\/31","type":"Feature","geometry":{"type":"Point","coordinates":[74.061666666667,21.9875]},"properties":{"country":"India","cntrycd":"INDA","stprov":"Gujarat","depname":"Amba Dongar","latitude":"21.9875","latdeg":21,"latmin":59,"latsec":15,"longitude":"74.0616666666667","londeg":74,"lonmin":3,"lonsec":42,"startdate":"1970","mintype":"Fe-carbonatite, s\u00f6vite","oreton":"11.6","deptype":10,"niobium":"0","ree":"1.06","p2o5":"0","grades":"30% CaF2 (Viladkar, 1981); Re2O3 approximate grade calculated from Viladkar and Dulski (1986).","depage":"65\u00b10.3 Ar-Ar, phlogopite","agemy":"65","tectset":"Indian craton; Narmada rift zone","rocks":"carbonatite breccia, carbonatite, nepheline syenite, nephelinite, phonolite","rocksmap":"basalt (Eocene), limestone, sandstone (Cretaceous), fragments of metamorphic rocks (Precambrian), syenite plugs","orebody_fm":"alkali-carbonatite intrusion","ore_a":"4.5","ore_area":"10.6","ore_b":"3","alttype":"fenitization (ring)","altwidth":"0.15","comments":"Produced fluorite only. Fluorite disseminated in carbonatite, mainly postdated hydrothermal veins and replacement bodies in carbonatite and in brecciated sandstone.","mineral":[{"role":"ore","name":"apatite"},{"role":"ore","name":"barite"},{"role":"ore","name":"bastnaesite"},{"role":"ore","name":"chalcopyrite"},{"role":"ore","name":"fluorite"},{"role":"ore","name":"galena"},{"role":"ore","name":"magnetite"},{"role":"ore","name":"pyrochlore"},{"role":"ore","name":"zirconolite"},{"role":"gangue","name":"ankerite"},{"role":"gangue","name":"calcite"},{"role":"gangue","name":"dickite"},{"role":"gangue","name":"phlogopite"},{"role":"gangue","name":"quartz"},{"role":"gangue","name":"siderite"}],"reference":["Gwalani, L.G., Rock, N.M.S., Chang, W.-J., Fernandez, S., All\u00e9gre, C.J., and Prinzhofer, A., 1993, Alkaline rocks and carbonatites of Amba Dongar and adjacent areas, Deccan igneous province, Gujarat, India\u00971. Geology, petrography and petrochemistry: Mineralogy and Petrology, v. 47, p. 219\u0096253.","Palmer, D.A.S., and Williams-Jones, A.E., 1996, Genesis of the carbonatite-hosted fluorite deposit at Amba Dongar, India\u0097Evidence from fluid inclusions, stable isotopes, and whole rock-mineral geochemistry: Economic Geology, v. 91, p. 934\u0096950.","Ray, J.S., Ramesh, R., Pande, K., Trivedi, J.R., Shukla, P.N., and Patel, P.P., 2000, Isotope and rare earth element chemistry of carbonatite-alkaline complexes of Deccan volcanic province\u0097Implications to magmatic and alteration processes: Journal of Asian Earth Sciences, v. 18, p. 177\u0096194.","Simonetti, A., and Bell, K., 1995, Nd, Rb, and Sr isotope systematics of fluorite at the Amba Dongar carbonatite complex, India\u0097Evidence for hydrothermal and crustal fluid mixing: Economic Geology, v. 60, p. 2018\u00962027.","Viladkar, S.G., 1981,The carbonatites of Amba Dongar, Gujarat, India: Bulletin of the Geological Society of Finland, v. 53, p. 17\u009628.","Viladkar, S.G., and Dulski, P., 1986, Rare earth element abundances in carbonatites, alkaline rocks and fenites of the Amba Dongar complex, Gujarat, India: Neues Jahrbuch f\u00fcr Mineralogie, Monatshefte, H. 1, p. 37\u009648."]}}
url: https://mrdata.usgs.gov/carbonatite/show-carbonatite.php?rec_id=31