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Geology of carbonatite-alkalic rock complexes in Ontario by R. P. Sage, , Ontario Ministry of Northern Development and Mines, Mines and Minerals Division edition, in EnglishPages: The Ngualla carbonatite complex is located km north northwest of Mbeya, in southwest Tanzania. It was emplaced into the southwest margin of the Tanzania Craton, which is relatively small and thin compared to the West African, Congo and Kalahari Cratons that dominate the African continent (Fig. 1a and b).The southwest margin of the Tanzania Craton is interpreted as a Cited by: 4. Get this from a library! Geology of carbonatite--alkalic rock complexes in Ontario: Prairie Lake Carbonatite Complex, district of Thunder Bay. [R P Sage; Ontario. Ministry of Northern Development and Mines.; Ontario Geological Survey.]. Geology of carbonatite-alkalic rock complexes in Ontario: Schryburt Lake Carbonatite Complex, district of Kenora. [R P Sage] Print book: State or province government publication: EnglishView all editions and formats: Rating: (not yet rated) 0 with reviews - Be the first.
08/15/ (T Pettigrew) - The Carb Lake carbonatite complex is a Proterozoic aged intrusive unit hosted within Archean age domains of the Superior Province. The Carb Lake carbonatite complex has been dated by K-Ar isotope methods at ±97 Ma (Sage, ) and intrudes the Oxford-Stull Domain (Stott, ). The Ashram Zone, which is host to the Ashram Rare Earth Element (REE) Deposit, occurs within the Eldor Carbonatite Complex, Québec, Canada. The complex is located within the Paleoproterozoic New Québec Orogen (Labrador Trough), and has been subjected to greenschist metamorphism and folding during the Hudsonian Orogeny at Ga. The Prairie Lake complex can also be seen to fall within the North American Mid-Continent gravity high and the major regional Carb Structure which includes several carbonatite complexes and extends for a distance of at least km (see Erdosh,). Both magnetic and radiometric positive anomalies super. The complex contains a unique, very high grade residual phosphate deposit associated with a well-developed karst topography now buried under glacial lake clays. During karst development carbonates were dissolved from the carbonatite, and residual minerals, mainly apatite, were concentrated in sink holes and troughs.
Carb Lake carbonatite complex, Carb Lake Area, Kenora District, Ontario, Canada: A remote, unexposed carbonatite complex consisting of sovite and silicocarbonatite rocks, delineated by aeromagnetic survey is estimated to cover an area of 8 km². Some exploratory drilling was done. H. O’Brien, in Mineral Deposits of Finland, Introduction. Carbonatite is a unique igneous rock type, in that it formed predominantly of carbonate minerals (of which it must contain >50 modal % by definition) along with lesser silicates, phosphate minerals, and oxides. The term carbonatite was introduced by Brøgger in in his studies of the Fen complex in Norway (Brøgger, Spine title: Carbonatite-alkalic rock complexes, Killala Lake. One folded col. map in pocket. Description: vii, pages: illustrations, maps (some color) ; 25 cm. Series Title: Ontario Geological Survey study, Other Titles: Killala Lake Alkalic Rock Complex, district of Thunder Bay Carbonatite-alkalic rock complexes, Killala Lake. ⓘ Carb Lake carbonatite complex [ Ancylite-(Ce) ] SAGE, R.P. () Geology of the Carb Lake carbonatite complex. Ontario Geological Survey Open File Report , 68p.